drivers/gpu/drm/i915/intel_display.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Eric Anholt <eric@anholt.net>
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/input.h>
  29 #include <linux/i2c.h>
  30 #include <linux/kernel.h>
  31 #include <linux/slab.h>
  32 #include <linux/vgaarb.h>
  33 #include "drmP.h"
  34 #include "intel_drv.h"
  35 #include "i915_drm.h"
  36 #include "i915_drv.h"
  37 #include "i915_trace.h"
  38 #include "drm_dp_helper.h"
  39
  40 #include "drm_crtc_helper.h"
  41
  42 #define HAS_eDP (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
  43
  44 bool intel_pipe_has_type (struct drm_crtc *crtc, int type);
  45 static void intel_update_watermarks(struct drm_device *dev);
  46 static void intel_increase_pllclock(struct drm_crtc *crtc, bool schedule);
  47 static void intel_crtc_update_cursor(struct drm_crtc *crtc);
  48
  49 typedef struct {
  50     /* given values */
  51     int n;
  52     int m1, m2;
  53     int p1, p2;
  54     /* derived values */
  55     int dot;
  56     int vco;
  57     int m;
  58     int p;
  59 } intel_clock_t;
  60
  61 typedef struct {
  62     int min, max;
  63 } intel_range_t;
  64
  65 typedef struct {
  66     int dot_limit;
  67     int p2_slow, p2_fast;
  68 } intel_p2_t;
  69
  70 #define INTEL_P2_NUM                  2
  71 typedef struct intel_limit intel_limit_t;
  72 struct intel_limit {
  73     intel_range_t   dot, vco, n, m, m1, m2, p, p1;
  74     intel_p2_t      p2;
  75     bool (* find_pll)(const intel_limit_t *, struct drm_crtc *,
  76                       int, int, intel_clock_t *);
  77 };
  78
  79 #define I8XX_DOT_MIN              25000
  80 #define I8XX_DOT_MAX             350000
  81 #define I8XX_VCO_MIN             930000
  82 #define I8XX_VCO_MAX            1400000
  83 #define I8XX_N_MIN                    3
  84 #define I8XX_N_MAX                   16
  85 #define I8XX_M_MIN                   96
  86 #define I8XX_M_MAX                  140
  87 #define I8XX_M1_MIN                  18
  88 #define I8XX_M1_MAX                  26
  89 #define I8XX_M2_MIN                   6
  90 #define I8XX_M2_MAX                  16
  91 #define I8XX_P_MIN                    4
  92 #define I8XX_P_MAX                  128
  93 #define I8XX_P1_MIN                   2
  94 #define I8XX_P1_MAX                  33
  95 #define I8XX_P1_LVDS_MIN              1
  96 #define I8XX_P1_LVDS_MAX              6
  97 #define I8XX_P2_SLOW                  4
  98 #define I8XX_P2_FAST                  2
  99 #define I8XX_P2_LVDS_SLOW             14
 100 #define I8XX_P2_LVDS_FAST             7
 101 #define I8XX_P2_SLOW_LIMIT       165000
 102
 103 #define I9XX_DOT_MIN              20000
 104 #define I9XX_DOT_MAX             400000
 105 #define I9XX_VCO_MIN            1400000
 106 #define I9XX_VCO_MAX            2800000
 107 #define PINEVIEW_VCO_MIN                1700000
 108 #define PINEVIEW_VCO_MAX                3500000
 109 #define I9XX_N_MIN                    1
 110 #define I9XX_N_MAX                    6
 111 /* Pineview's Ncounter is a ring counter */
 112 #define PINEVIEW_N_MIN                3
 113 #define PINEVIEW_N_MAX                6
 114 #define I9XX_M_MIN                   70
 115 #define I9XX_M_MAX                  120
 116 #define PINEVIEW_M_MIN                2
 117 #define PINEVIEW_M_MAX              256
 118 #define I9XX_M1_MIN                  10
 119 #define I9XX_M1_MAX                  22
 120 #define I9XX_M2_MIN                   5
 121 #define I9XX_M2_MAX                   9
 122 /* Pineview M1 is reserved, and must be 0 */
 123 #define PINEVIEW_M1_MIN               0
 124 #define PINEVIEW_M1_MAX               0
 125 #define PINEVIEW_M2_MIN               0
 126 #define PINEVIEW_M2_MAX               254
 127 #define I9XX_P_SDVO_DAC_MIN           5
 128 #define I9XX_P_SDVO_DAC_MAX          80
 129 #define I9XX_P_LVDS_MIN               7
 130 #define I9XX_P_LVDS_MAX              98
 131 #define PINEVIEW_P_LVDS_MIN                   7
 132 #define PINEVIEW_P_LVDS_MAX                  112
 133 #define I9XX_P1_MIN                   1
 134 #define I9XX_P1_MAX                   8
 135 #define I9XX_P2_SDVO_DAC_SLOW                10
 136 #define I9XX_P2_SDVO_DAC_FAST                 5
 137 #define I9XX_P2_SDVO_DAC_SLOW_LIMIT      200000
 138 #define I9XX_P2_LVDS_SLOW                    14
 139 #define I9XX_P2_LVDS_FAST                     7
 140 #define I9XX_P2_LVDS_SLOW_LIMIT          112000
 141
 142 /*The parameter is for SDVO on G4x platform*/
 143 #define G4X_DOT_SDVO_MIN           25000
 144 #define G4X_DOT_SDVO_MAX           270000
 145 #define G4X_VCO_MIN                1750000
 146 #define G4X_VCO_MAX                3500000
 147 #define G4X_N_SDVO_MIN             1
 148 #define G4X_N_SDVO_MAX             4
 149 #define G4X_M_SDVO_MIN             104
 150 #define G4X_M_SDVO_MAX             138
 151 #define G4X_M1_SDVO_MIN            17
 152 #define G4X_M1_SDVO_MAX            23
 153 #define G4X_M2_SDVO_MIN            5
 154 #define G4X_M2_SDVO_MAX            11
 155 #define G4X_P_SDVO_MIN             10
 156 #define G4X_P_SDVO_MAX             30
 157 #define G4X_P1_SDVO_MIN            1
 158 #define G4X_P1_SDVO_MAX            3
 159 #define G4X_P2_SDVO_SLOW           10
 160 #define G4X_P2_SDVO_FAST           10
 161 #define G4X_P2_SDVO_LIMIT          270000
 162
 163 /*The parameter is for HDMI_DAC on G4x platform*/
 164 #define G4X_DOT_HDMI_DAC_MIN           22000
 165 #define G4X_DOT_HDMI_DAC_MAX           400000
 166 #define G4X_N_HDMI_DAC_MIN             1
 167 #define G4X_N_HDMI_DAC_MAX             4
 168 #define G4X_M_HDMI_DAC_MIN             104
 169 #define G4X_M_HDMI_DAC_MAX             138
 170 #define G4X_M1_HDMI_DAC_MIN            16
 171 #define G4X_M1_HDMI_DAC_MAX            23
 172 #define G4X_M2_HDMI_DAC_MIN            5
 173 #define G4X_M2_HDMI_DAC_MAX            11
 174 #define G4X_P_HDMI_DAC_MIN             5
 175 #define G4X_P_HDMI_DAC_MAX             80
 176 #define G4X_P1_HDMI_DAC_MIN            1
 177 #define G4X_P1_HDMI_DAC_MAX            8
 178 #define G4X_P2_HDMI_DAC_SLOW           10
 179 #define G4X_P2_HDMI_DAC_FAST           5
 180 #define G4X_P2_HDMI_DAC_LIMIT          165000
 181
 182 /*The parameter is for SINGLE_CHANNEL_LVDS on G4x platform*/
 183 #define G4X_DOT_SINGLE_CHANNEL_LVDS_MIN           20000
 184 #define G4X_DOT_SINGLE_CHANNEL_LVDS_MAX           115000
 185 #define G4X_N_SINGLE_CHANNEL_LVDS_MIN             1
 186 #define G4X_N_SINGLE_CHANNEL_LVDS_MAX             3
 187 #define G4X_M_SINGLE_CHANNEL_LVDS_MIN             104
 188 #define G4X_M_SINGLE_CHANNEL_LVDS_MAX             138
 189 #define G4X_M1_SINGLE_CHANNEL_LVDS_MIN            17
 190 #define G4X_M1_SINGLE_CHANNEL_LVDS_MAX            23
 191 #define G4X_M2_SINGLE_CHANNEL_LVDS_MIN            5
 192 #define G4X_M2_SINGLE_CHANNEL_LVDS_MAX            11
 193 #define G4X_P_SINGLE_CHANNEL_LVDS_MIN             28
 194 #define G4X_P_SINGLE_CHANNEL_LVDS_MAX             112
 195 #define G4X_P1_SINGLE_CHANNEL_LVDS_MIN            2
 196 #define G4X_P1_SINGLE_CHANNEL_LVDS_MAX            8
 197 #define G4X_P2_SINGLE_CHANNEL_LVDS_SLOW           14
 198 #define G4X_P2_SINGLE_CHANNEL_LVDS_FAST           14
 199 #define G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT          0
 200
 201 /*The parameter is for DUAL_CHANNEL_LVDS on G4x platform*/
 202 #define G4X_DOT_DUAL_CHANNEL_LVDS_MIN           80000
 203 #define G4X_DOT_DUAL_CHANNEL_LVDS_MAX           224000
 204 #define G4X_N_DUAL_CHANNEL_LVDS_MIN             1
 205 #define G4X_N_DUAL_CHANNEL_LVDS_MAX             3
 206 #define G4X_M_DUAL_CHANNEL_LVDS_MIN             104
 207 #define G4X_M_DUAL_CHANNEL_LVDS_MAX             138
 208 #define G4X_M1_DUAL_CHANNEL_LVDS_MIN            17
 209 #define G4X_M1_DUAL_CHANNEL_LVDS_MAX            23
 210 #define G4X_M2_DUAL_CHANNEL_LVDS_MIN            5
 211 #define G4X_M2_DUAL_CHANNEL_LVDS_MAX            11
 212 #define G4X_P_DUAL_CHANNEL_LVDS_MIN             14
 213 #define G4X_P_DUAL_CHANNEL_LVDS_MAX             42
 214 #define G4X_P1_DUAL_CHANNEL_LVDS_MIN            2
 215 #define G4X_P1_DUAL_CHANNEL_LVDS_MAX            6
 216 #define G4X_P2_DUAL_CHANNEL_LVDS_SLOW           7
 217 #define G4X_P2_DUAL_CHANNEL_LVDS_FAST           7
 218 #define G4X_P2_DUAL_CHANNEL_LVDS_LIMIT          0
 219
 220 /*The parameter is for DISPLAY PORT on G4x platform*/
 221 #define G4X_DOT_DISPLAY_PORT_MIN           161670
 222 #define G4X_DOT_DISPLAY_PORT_MAX           227000
 223 #define G4X_N_DISPLAY_PORT_MIN             1
 224 #define G4X_N_DISPLAY_PORT_MAX             2
 225 #define G4X_M_DISPLAY_PORT_MIN             97
 226 #define G4X_M_DISPLAY_PORT_MAX             108
 227 #define G4X_M1_DISPLAY_PORT_MIN            0x10
 228 #define G4X_M1_DISPLAY_PORT_MAX            0x12
 229 #define G4X_M2_DISPLAY_PORT_MIN            0x05
 230 #define G4X_M2_DISPLAY_PORT_MAX            0x06
 231 #define G4X_P_DISPLAY_PORT_MIN             10
 232 #define G4X_P_DISPLAY_PORT_MAX             20
 233 #define G4X_P1_DISPLAY_PORT_MIN            1
 234 #define G4X_P1_DISPLAY_PORT_MAX            2
 235 #define G4X_P2_DISPLAY_PORT_SLOW           10
 236 #define G4X_P2_DISPLAY_PORT_FAST           10
 237 #define G4X_P2_DISPLAY_PORT_LIMIT          0
 238
 239 /* Ironlake / Sandybridge */
 240 /* as we calculate clock using (register_value + 2) for
 241    N/M1/M2, so here the range value for them is (actual_value-2).
 242  */
 243 #define IRONLAKE_DOT_MIN         25000
 244 #define IRONLAKE_DOT_MAX         350000
 245 #define IRONLAKE_VCO_MIN         1760000
 246 #define IRONLAKE_VCO_MAX         3510000
 247 #define IRONLAKE_M1_MIN          12
 248 #define IRONLAKE_M1_MAX          22
 249 #define IRONLAKE_M2_MIN          5
 250 #define IRONLAKE_M2_MAX          9
 251 #define IRONLAKE_P2_DOT_LIMIT    225000 /* 225Mhz */
 252
 253 /* We have parameter ranges for different type of outputs. */
 254
 255 /* DAC & HDMI Refclk 120Mhz */
 256 #define IRONLAKE_DAC_N_MIN      1
 257 #define IRONLAKE_DAC_N_MAX      5
 258 #define IRONLAKE_DAC_M_MIN      79
 259 #define IRONLAKE_DAC_M_MAX      127
 260 #define IRONLAKE_DAC_P_MIN      5
 261 #define IRONLAKE_DAC_P_MAX      80
 262 #define IRONLAKE_DAC_P1_MIN     1
 263 #define IRONLAKE_DAC_P1_MAX     8
 264 #define IRONLAKE_DAC_P2_SLOW    10
 265 #define IRONLAKE_DAC_P2_FAST    5
 266
 267 /* LVDS single-channel 120Mhz refclk */
 268 #define IRONLAKE_LVDS_S_N_MIN   1
 269 #define IRONLAKE_LVDS_S_N_MAX   3
 270 #define IRONLAKE_LVDS_S_M_MIN   79
 271 #define IRONLAKE_LVDS_S_M_MAX   118
 272 #define IRONLAKE_LVDS_S_P_MIN   28
 273 #define IRONLAKE_LVDS_S_P_MAX   112
 274 #define IRONLAKE_LVDS_S_P1_MIN  2
 275 #define IRONLAKE_LVDS_S_P1_MAX  8
 276 #define IRONLAKE_LVDS_S_P2_SLOW 14
 277 #define IRONLAKE_LVDS_S_P2_FAST 14
 278
 279 /* LVDS dual-channel 120Mhz refclk */
 280 #define IRONLAKE_LVDS_D_N_MIN   1
 281 #define IRONLAKE_LVDS_D_N_MAX   3
 282 #define IRONLAKE_LVDS_D_M_MIN   79
 283 #define IRONLAKE_LVDS_D_M_MAX   127
 284 #define IRONLAKE_LVDS_D_P_MIN   14
 285 #define IRONLAKE_LVDS_D_P_MAX   56
 286 #define IRONLAKE_LVDS_D_P1_MIN  2
 287 #define IRONLAKE_LVDS_D_P1_MAX  8
 288 #define IRONLAKE_LVDS_D_P2_SLOW 7
 289 #define IRONLAKE_LVDS_D_P2_FAST 7
 290
 291 /* LVDS single-channel 100Mhz refclk */
 292 #define IRONLAKE_LVDS_S_SSC_N_MIN       1
 293 #define IRONLAKE_LVDS_S_SSC_N_MAX       2
 294 #define IRONLAKE_LVDS_S_SSC_M_MIN       79
 295 #define IRONLAKE_LVDS_S_SSC_M_MAX       126
 296 #define IRONLAKE_LVDS_S_SSC_P_MIN       28
 297 #define IRONLAKE_LVDS_S_SSC_P_MAX       112
 298 #define IRONLAKE_LVDS_S_SSC_P1_MIN      2
 299 #define IRONLAKE_LVDS_S_SSC_P1_MAX      8
 300 #define IRONLAKE_LVDS_S_SSC_P2_SLOW     14
 301 #define IRONLAKE_LVDS_S_SSC_P2_FAST     14
 302
 303 /* LVDS dual-channel 100Mhz refclk */
 304 #define IRONLAKE_LVDS_D_SSC_N_MIN       1
 305 #define IRONLAKE_LVDS_D_SSC_N_MAX       3
 306 #define IRONLAKE_LVDS_D_SSC_M_MIN       79
 307 #define IRONLAKE_LVDS_D_SSC_M_MAX       126
 308 #define IRONLAKE_LVDS_D_SSC_P_MIN       14
 309 #define IRONLAKE_LVDS_D_SSC_P_MAX       42
 310 #define IRONLAKE_LVDS_D_SSC_P1_MIN      2
 311 #define IRONLAKE_LVDS_D_SSC_P1_MAX      6
 312 #define IRONLAKE_LVDS_D_SSC_P2_SLOW     7
 313 #define IRONLAKE_LVDS_D_SSC_P2_FAST     7
 314
 315 /* DisplayPort */
 316 #define IRONLAKE_DP_N_MIN               1
 317 #define IRONLAKE_DP_N_MAX               2
 318 #define IRONLAKE_DP_M_MIN               81
 319 #define IRONLAKE_DP_M_MAX               90
 320 #define IRONLAKE_DP_P_MIN               10
 321 #define IRONLAKE_DP_P_MAX               20
 322 #define IRONLAKE_DP_P2_FAST             10
 323 #define IRONLAKE_DP_P2_SLOW             10
 324 #define IRONLAKE_DP_P2_LIMIT            0
 325 #define IRONLAKE_DP_P1_MIN              1
 326 #define IRONLAKE_DP_P1_MAX              2
 327
 328 /* FDI */
 329 #define IRONLAKE_FDI_FREQ               2700000 /* in kHz for mode->clock */
 330
 331 static bool
 332 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 333                     int target, int refclk, intel_clock_t *best_clock);
 334 static bool
 335 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 336                         int target, int refclk, intel_clock_t *best_clock);
 337
 338 static bool
 339 intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
 340                       int target, int refclk, intel_clock_t *best_clock);
 341 static bool
 342 intel_find_pll_ironlake_dp(const intel_limit_t *, struct drm_crtc *crtc,
 343                            int target, int refclk, intel_clock_t *best_clock);
 344
 345 static const intel_limit_t intel_limits_i8xx_dvo = {
 346         .dot = { .min = I8XX_DOT_MIN,           .max = I8XX_DOT_MAX },
 347         .vco = { .min = I8XX_VCO_MIN,           .max = I8XX_VCO_MAX },
 348         .n   = { .min = I8XX_N_MIN,             .max = I8XX_N_MAX },
 349         .m   = { .min = I8XX_M_MIN,             .max = I8XX_M_MAX },
 350         .m1  = { .min = I8XX_M1_MIN,            .max = I8XX_M1_MAX },
 351         .m2  = { .min = I8XX_M2_MIN,            .max = I8XX_M2_MAX },
 352         .p   = { .min = I8XX_P_MIN,             .max = I8XX_P_MAX },
 353         .p1  = { .min = I8XX_P1_MIN,            .max = I8XX_P1_MAX },
 354         .p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
 355                  .p2_slow = I8XX_P2_SLOW,       .p2_fast = I8XX_P2_FAST },
 356         .find_pll = intel_find_best_PLL,
 357 };
 358
 359 static const intel_limit_t intel_limits_i8xx_lvds = {
 360         .dot = { .min = I8XX_DOT_MIN,           .max = I8XX_DOT_MAX },
 361         .vco = { .min = I8XX_VCO_MIN,           .max = I8XX_VCO_MAX },
 362         .n   = { .min = I8XX_N_MIN,             .max = I8XX_N_MAX },
 363         .m   = { .min = I8XX_M_MIN,             .max = I8XX_M_MAX },
 364         .m1  = { .min = I8XX_M1_MIN,            .max = I8XX_M1_MAX },
 365         .m2  = { .min = I8XX_M2_MIN,            .max = I8XX_M2_MAX },
 366         .p   = { .min = I8XX_P_MIN,             .max = I8XX_P_MAX },
 367         .p1  = { .min = I8XX_P1_LVDS_MIN,       .max = I8XX_P1_LVDS_MAX },
 368         .p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
 369                  .p2_slow = I8XX_P2_LVDS_SLOW,  .p2_fast = I8XX_P2_LVDS_FAST },
 370         .find_pll = intel_find_best_PLL,
 371 };
 372
 373 static const intel_limit_t intel_limits_i9xx_sdvo = {
 374         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
 375         .vco = { .min = I9XX_VCO_MIN,           .max = I9XX_VCO_MAX },
 376         .n   = { .min = I9XX_N_MIN,             .max = I9XX_N_MAX },
 377         .m   = { .min = I9XX_M_MIN,             .max = I9XX_M_MAX },
 378         .m1  = { .min = I9XX_M1_MIN,            .max = I9XX_M1_MAX },
 379         .m2  = { .min = I9XX_M2_MIN,            .max = I9XX_M2_MAX },
 380         .p   = { .min = I9XX_P_SDVO_DAC_MIN,    .max = I9XX_P_SDVO_DAC_MAX },
 381         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 382         .p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
 383                  .p2_slow = I9XX_P2_SDVO_DAC_SLOW,      .p2_fast = I9XX_P2_SDVO_DAC_FAST },
 384         .find_pll = intel_find_best_PLL,
 385 };
 386
 387 static const intel_limit_t intel_limits_i9xx_lvds = {
 388         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
 389         .vco = { .min = I9XX_VCO_MIN,           .max = I9XX_VCO_MAX },
 390         .n   = { .min = I9XX_N_MIN,             .max = I9XX_N_MAX },
 391         .m   = { .min = I9XX_M_MIN,             .max = I9XX_M_MAX },
 392         .m1  = { .min = I9XX_M1_MIN,            .max = I9XX_M1_MAX },
 393         .m2  = { .min = I9XX_M2_MIN,            .max = I9XX_M2_MAX },
 394         .p   = { .min = I9XX_P_LVDS_MIN,        .max = I9XX_P_LVDS_MAX },
 395         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 396         /* The single-channel range is 25-112Mhz, and dual-channel
 397          * is 80-224Mhz.  Prefer single channel as much as possible.
 398          */
 399         .p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
 400                  .p2_slow = I9XX_P2_LVDS_SLOW,  .p2_fast = I9XX_P2_LVDS_FAST },
 401         .find_pll = intel_find_best_PLL,
 402 };
 403
 404     /* below parameter and function is for G4X Chipset Family*/
 405 static const intel_limit_t intel_limits_g4x_sdvo = {
 406         .dot = { .min = G4X_DOT_SDVO_MIN,       .max = G4X_DOT_SDVO_MAX },
 407         .vco = { .min = G4X_VCO_MIN,            .max = G4X_VCO_MAX},
 408         .n   = { .min = G4X_N_SDVO_MIN,         .max = G4X_N_SDVO_MAX },
 409         .m   = { .min = G4X_M_SDVO_MIN,         .max = G4X_M_SDVO_MAX },
 410         .m1  = { .min = G4X_M1_SDVO_MIN,        .max = G4X_M1_SDVO_MAX },
 411         .m2  = { .min = G4X_M2_SDVO_MIN,        .max = G4X_M2_SDVO_MAX },
 412         .p   = { .min = G4X_P_SDVO_MIN,         .max = G4X_P_SDVO_MAX },
 413         .p1  = { .min = G4X_P1_SDVO_MIN,        .max = G4X_P1_SDVO_MAX},
 414         .p2  = { .dot_limit = G4X_P2_SDVO_LIMIT,
 415                  .p2_slow = G4X_P2_SDVO_SLOW,
 416                  .p2_fast = G4X_P2_SDVO_FAST
 417         },
 418         .find_pll = intel_g4x_find_best_PLL,
 419 };
 420
 421 static const intel_limit_t intel_limits_g4x_hdmi = {
 422         .dot = { .min = G4X_DOT_HDMI_DAC_MIN,   .max = G4X_DOT_HDMI_DAC_MAX },
 423         .vco = { .min = G4X_VCO_MIN,            .max = G4X_VCO_MAX},
 424         .n   = { .min = G4X_N_HDMI_DAC_MIN,     .max = G4X_N_HDMI_DAC_MAX },
 425         .m   = { .min = G4X_M_HDMI_DAC_MIN,     .max = G4X_M_HDMI_DAC_MAX },
 426         .m1  = { .min = G4X_M1_HDMI_DAC_MIN,    .max = G4X_M1_HDMI_DAC_MAX },
 427         .m2  = { .min = G4X_M2_HDMI_DAC_MIN,    .max = G4X_M2_HDMI_DAC_MAX },
 428         .p   = { .min = G4X_P_HDMI_DAC_MIN,     .max = G4X_P_HDMI_DAC_MAX },
 429         .p1  = { .min = G4X_P1_HDMI_DAC_MIN,    .max = G4X_P1_HDMI_DAC_MAX},
 430         .p2  = { .dot_limit = G4X_P2_HDMI_DAC_LIMIT,
 431                  .p2_slow = G4X_P2_HDMI_DAC_SLOW,
 432                  .p2_fast = G4X_P2_HDMI_DAC_FAST
 433         },
 434         .find_pll = intel_g4x_find_best_PLL,
 435 };
 436
 437 static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
 438         .dot = { .min = G4X_DOT_SINGLE_CHANNEL_LVDS_MIN,
 439                  .max = G4X_DOT_SINGLE_CHANNEL_LVDS_MAX },
 440         .vco = { .min = G4X_VCO_MIN,
 441                  .max = G4X_VCO_MAX },
 442         .n   = { .min = G4X_N_SINGLE_CHANNEL_LVDS_MIN,
 443                  .max = G4X_N_SINGLE_CHANNEL_LVDS_MAX },
 444         .m   = { .min = G4X_M_SINGLE_CHANNEL_LVDS_MIN,
 445                  .max = G4X_M_SINGLE_CHANNEL_LVDS_MAX },
 446         .m1  = { .min = G4X_M1_SINGLE_CHANNEL_LVDS_MIN,
 447                  .max = G4X_M1_SINGLE_CHANNEL_LVDS_MAX },
 448         .m2  = { .min = G4X_M2_SINGLE_CHANNEL_LVDS_MIN,
 449                  .max = G4X_M2_SINGLE_CHANNEL_LVDS_MAX },
 450         .p   = { .min = G4X_P_SINGLE_CHANNEL_LVDS_MIN,
 451                  .max = G4X_P_SINGLE_CHANNEL_LVDS_MAX },
 452         .p1  = { .min = G4X_P1_SINGLE_CHANNEL_LVDS_MIN,
 453                  .max = G4X_P1_SINGLE_CHANNEL_LVDS_MAX },
 454         .p2  = { .dot_limit = G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT,
 455                  .p2_slow = G4X_P2_SINGLE_CHANNEL_LVDS_SLOW,
 456                  .p2_fast = G4X_P2_SINGLE_CHANNEL_LVDS_FAST
 457         },
 458         .find_pll = intel_g4x_find_best_PLL,
 459 };
 460
 461 static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
 462         .dot = { .min = G4X_DOT_DUAL_CHANNEL_LVDS_MIN,
 463                  .max = G4X_DOT_DUAL_CHANNEL_LVDS_MAX },
 464         .vco = { .min = G4X_VCO_MIN,
 465                  .max = G4X_VCO_MAX },
 466         .n   = { .min = G4X_N_DUAL_CHANNEL_LVDS_MIN,
 467                  .max = G4X_N_DUAL_CHANNEL_LVDS_MAX },
 468         .m   = { .min = G4X_M_DUAL_CHANNEL_LVDS_MIN,
 469                  .max = G4X_M_DUAL_CHANNEL_LVDS_MAX },
 470         .m1  = { .min = G4X_M1_DUAL_CHANNEL_LVDS_MIN,
 471                  .max = G4X_M1_DUAL_CHANNEL_LVDS_MAX },
 472         .m2  = { .min = G4X_M2_DUAL_CHANNEL_LVDS_MIN,
 473                  .max = G4X_M2_DUAL_CHANNEL_LVDS_MAX },
 474         .p   = { .min = G4X_P_DUAL_CHANNEL_LVDS_MIN,
 475                  .max = G4X_P_DUAL_CHANNEL_LVDS_MAX },
 476         .p1  = { .min = G4X_P1_DUAL_CHANNEL_LVDS_MIN,
 477                  .max = G4X_P1_DUAL_CHANNEL_LVDS_MAX },
 478         .p2  = { .dot_limit = G4X_P2_DUAL_CHANNEL_LVDS_LIMIT,
 479                  .p2_slow = G4X_P2_DUAL_CHANNEL_LVDS_SLOW,
 480                  .p2_fast = G4X_P2_DUAL_CHANNEL_LVDS_FAST
 481         },
 482         .find_pll = intel_g4x_find_best_PLL,
 483 };
 484
 485 static const intel_limit_t intel_limits_g4x_display_port = {
 486         .dot = { .min = G4X_DOT_DISPLAY_PORT_MIN,
 487                  .max = G4X_DOT_DISPLAY_PORT_MAX },
 488         .vco = { .min = G4X_VCO_MIN,
 489                  .max = G4X_VCO_MAX},
 490         .n   = { .min = G4X_N_DISPLAY_PORT_MIN,
 491                  .max = G4X_N_DISPLAY_PORT_MAX },
 492         .m   = { .min = G4X_M_DISPLAY_PORT_MIN,
 493                  .max = G4X_M_DISPLAY_PORT_MAX },
 494         .m1  = { .min = G4X_M1_DISPLAY_PORT_MIN,
 495                  .max = G4X_M1_DISPLAY_PORT_MAX },
 496         .m2  = { .min = G4X_M2_DISPLAY_PORT_MIN,
 497                  .max = G4X_M2_DISPLAY_PORT_MAX },
 498         .p   = { .min = G4X_P_DISPLAY_PORT_MIN,
 499                  .max = G4X_P_DISPLAY_PORT_MAX },
 500         .p1  = { .min = G4X_P1_DISPLAY_PORT_MIN,
 501                  .max = G4X_P1_DISPLAY_PORT_MAX},
 502         .p2  = { .dot_limit = G4X_P2_DISPLAY_PORT_LIMIT,
 503                  .p2_slow = G4X_P2_DISPLAY_PORT_SLOW,
 504                  .p2_fast = G4X_P2_DISPLAY_PORT_FAST },
 505         .find_pll = intel_find_pll_g4x_dp,
 506 };
 507
 508 static const intel_limit_t intel_limits_pineview_sdvo = {
 509         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX},
 510         .vco = { .min = PINEVIEW_VCO_MIN,               .max = PINEVIEW_VCO_MAX },
 511         .n   = { .min = PINEVIEW_N_MIN,         .max = PINEVIEW_N_MAX },
 512         .m   = { .min = PINEVIEW_M_MIN,         .max = PINEVIEW_M_MAX },
 513         .m1  = { .min = PINEVIEW_M1_MIN,                .max = PINEVIEW_M1_MAX },
 514         .m2  = { .min = PINEVIEW_M2_MIN,                .max = PINEVIEW_M2_MAX },
 515         .p   = { .min = I9XX_P_SDVO_DAC_MIN,    .max = I9XX_P_SDVO_DAC_MAX },
 516         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 517         .p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
 518                  .p2_slow = I9XX_P2_SDVO_DAC_SLOW,      .p2_fast = I9XX_P2_SDVO_DAC_FAST },
 519         .find_pll = intel_find_best_PLL,
 520 };
 521
 522 static const intel_limit_t intel_limits_pineview_lvds = {
 523         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
 524         .vco = { .min = PINEVIEW_VCO_MIN,               .max = PINEVIEW_VCO_MAX },
 525         .n   = { .min = PINEVIEW_N_MIN,         .max = PINEVIEW_N_MAX },
 526         .m   = { .min = PINEVIEW_M_MIN,         .max = PINEVIEW_M_MAX },
 527         .m1  = { .min = PINEVIEW_M1_MIN,                .max = PINEVIEW_M1_MAX },
 528         .m2  = { .min = PINEVIEW_M2_MIN,                .max = PINEVIEW_M2_MAX },
 529         .p   = { .min = PINEVIEW_P_LVDS_MIN,    .max = PINEVIEW_P_LVDS_MAX },
 530         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 531         /* Pineview only supports single-channel mode. */
 532         .p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
 533                  .p2_slow = I9XX_P2_LVDS_SLOW,  .p2_fast = I9XX_P2_LVDS_SLOW },
 534         .find_pll = intel_find_best_PLL,
 535 };
 536
 537 static const intel_limit_t intel_limits_ironlake_dac = {
 538         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 539         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 540         .n   = { .min = IRONLAKE_DAC_N_MIN,        .max = IRONLAKE_DAC_N_MAX },
 541         .m   = { .min = IRONLAKE_DAC_M_MIN,        .max = IRONLAKE_DAC_M_MAX },
 542         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 543         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 544         .p   = { .min = IRONLAKE_DAC_P_MIN,        .max = IRONLAKE_DAC_P_MAX },
 545         .p1  = { .min = IRONLAKE_DAC_P1_MIN,       .max = IRONLAKE_DAC_P1_MAX },
 546         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 547                  .p2_slow = IRONLAKE_DAC_P2_SLOW,
 548                  .p2_fast = IRONLAKE_DAC_P2_FAST },
 549         .find_pll = intel_g4x_find_best_PLL,
 550 };
 551
 552 static const intel_limit_t intel_limits_ironlake_single_lvds = {
 553         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 554         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 555         .n   = { .min = IRONLAKE_LVDS_S_N_MIN,     .max = IRONLAKE_LVDS_S_N_MAX },
 556         .m   = { .min = IRONLAKE_LVDS_S_M_MIN,     .max = IRONLAKE_LVDS_S_M_MAX },
 557         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 558         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 559         .p   = { .min = IRONLAKE_LVDS_S_P_MIN,     .max = IRONLAKE_LVDS_S_P_MAX },
 560         .p1  = { .min = IRONLAKE_LVDS_S_P1_MIN,    .max = IRONLAKE_LVDS_S_P1_MAX },
 561         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 562                  .p2_slow = IRONLAKE_LVDS_S_P2_SLOW,
 563                  .p2_fast = IRONLAKE_LVDS_S_P2_FAST },
 564         .find_pll = intel_g4x_find_best_PLL,
 565 };
 566
 567 static const intel_limit_t intel_limits_ironlake_dual_lvds = {
 568         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 569         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 570         .n   = { .min = IRONLAKE_LVDS_D_N_MIN,     .max = IRONLAKE_LVDS_D_N_MAX },
 571         .m   = { .min = IRONLAKE_LVDS_D_M_MIN,     .max = IRONLAKE_LVDS_D_M_MAX },
 572         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 573         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 574         .p   = { .min = IRONLAKE_LVDS_D_P_MIN,     .max = IRONLAKE_LVDS_D_P_MAX },
 575         .p1  = { .min = IRONLAKE_LVDS_D_P1_MIN,    .max = IRONLAKE_LVDS_D_P1_MAX },
 576         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 577                  .p2_slow = IRONLAKE_LVDS_D_P2_SLOW,
 578                  .p2_fast = IRONLAKE_LVDS_D_P2_FAST },
 579         .find_pll = intel_g4x_find_best_PLL,
 580 };
 581
 582 static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
 583         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 584         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 585         .n   = { .min = IRONLAKE_LVDS_S_SSC_N_MIN, .max = IRONLAKE_LVDS_S_SSC_N_MAX },
 586         .m   = { .min = IRONLAKE_LVDS_S_SSC_M_MIN, .max = IRONLAKE_LVDS_S_SSC_M_MAX },
 587         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 588         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 589         .p   = { .min = IRONLAKE_LVDS_S_SSC_P_MIN, .max = IRONLAKE_LVDS_S_SSC_P_MAX },
 590         .p1  = { .min = IRONLAKE_LVDS_S_SSC_P1_MIN,.max = IRONLAKE_LVDS_S_SSC_P1_MAX },
 591         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 592                  .p2_slow = IRONLAKE_LVDS_S_SSC_P2_SLOW,
 593                  .p2_fast = IRONLAKE_LVDS_S_SSC_P2_FAST },
 594         .find_pll = intel_g4x_find_best_PLL,
 595 };
 596
 597 static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
 598         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 599         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 600         .n   = { .min = IRONLAKE_LVDS_D_SSC_N_MIN, .max = IRONLAKE_LVDS_D_SSC_N_MAX },
 601         .m   = { .min = IRONLAKE_LVDS_D_SSC_M_MIN, .max = IRONLAKE_LVDS_D_SSC_M_MAX },
 602         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 603         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 604         .p   = { .min = IRONLAKE_LVDS_D_SSC_P_MIN, .max = IRONLAKE_LVDS_D_SSC_P_MAX },
 605         .p1  = { .min = IRONLAKE_LVDS_D_SSC_P1_MIN,.max = IRONLAKE_LVDS_D_SSC_P1_MAX },
 606         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 607                  .p2_slow = IRONLAKE_LVDS_D_SSC_P2_SLOW,
 608                  .p2_fast = IRONLAKE_LVDS_D_SSC_P2_FAST },
 609         .find_pll = intel_g4x_find_best_PLL,
 610 };
 611
 612 static const intel_limit_t intel_limits_ironlake_display_port = {
 613         .dot = { .min = IRONLAKE_DOT_MIN,
 614                  .max = IRONLAKE_DOT_MAX },
 615         .vco = { .min = IRONLAKE_VCO_MIN,
 616                  .max = IRONLAKE_VCO_MAX},
 617         .n   = { .min = IRONLAKE_DP_N_MIN,
 618                  .max = IRONLAKE_DP_N_MAX },
 619         .m   = { .min = IRONLAKE_DP_M_MIN,
 620                  .max = IRONLAKE_DP_M_MAX },
 621         .m1  = { .min = IRONLAKE_M1_MIN,
 622                  .max = IRONLAKE_M1_MAX },
 623         .m2  = { .min = IRONLAKE_M2_MIN,
 624                  .max = IRONLAKE_M2_MAX },
 625         .p   = { .min = IRONLAKE_DP_P_MIN,
 626                  .max = IRONLAKE_DP_P_MAX },
 627         .p1  = { .min = IRONLAKE_DP_P1_MIN,
 628                  .max = IRONLAKE_DP_P1_MAX},
 629         .p2  = { .dot_limit = IRONLAKE_DP_P2_LIMIT,
 630                  .p2_slow = IRONLAKE_DP_P2_SLOW,
 631                  .p2_fast = IRONLAKE_DP_P2_FAST },
 632         .find_pll = intel_find_pll_ironlake_dp,
 633 };
 634
 635 static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc)
 636 {
 637         struct drm_device *dev = crtc->dev;
 638         struct drm_i915_private *dev_priv = dev->dev_private;
 639         const intel_limit_t *limit;
 640         int refclk = 120;
 641
 642         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 643                 if (dev_priv->lvds_use_ssc && dev_priv->lvds_ssc_freq == 100)
 644                         refclk = 100;
 645
 646                 if ((I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) ==
 647                     LVDS_CLKB_POWER_UP) {
 648                         /* LVDS dual channel */
 649                         if (refclk == 100)
 650                                 limit = &intel_limits_ironlake_dual_lvds_100m;
 651                         else
 652                                 limit = &intel_limits_ironlake_dual_lvds;
 653                 } else {
 654                         if (refclk == 100)
 655                                 limit = &intel_limits_ironlake_single_lvds_100m;
 656                         else
 657                                 limit = &intel_limits_ironlake_single_lvds;
 658                 }
 659         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
 660                         HAS_eDP)
 661                 limit = &intel_limits_ironlake_display_port;
 662         else
 663                 limit = &intel_limits_ironlake_dac;
 664
 665         return limit;
 666 }
 667
 668 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
 669 {
 670         struct drm_device *dev = crtc->dev;
 671         struct drm_i915_private *dev_priv = dev->dev_private;
 672         const intel_limit_t *limit;
 673
 674         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 675                 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
 676                     LVDS_CLKB_POWER_UP)
 677                         /* LVDS with dual channel */
 678                         limit = &intel_limits_g4x_dual_channel_lvds;
 679                 else
 680                         /* LVDS with dual channel */
 681                         limit = &intel_limits_g4x_single_channel_lvds;
 682         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
 683                    intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
 684                 limit = &intel_limits_g4x_hdmi;
 685         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
 686                 limit = &intel_limits_g4x_sdvo;
 687         } else if (intel_pipe_has_type (crtc, INTEL_OUTPUT_DISPLAYPORT)) {
 688                 limit = &intel_limits_g4x_display_port;
 689         } else /* The option is for other outputs */
 690                 limit = &intel_limits_i9xx_sdvo;
 691
 692         return limit;
 693 }
 694
 695 static const intel_limit_t *intel_limit(struct drm_crtc *crtc)
 696 {
 697         struct drm_device *dev = crtc->dev;
 698         const intel_limit_t *limit;
 699
 700         if (HAS_PCH_SPLIT(dev))
 701                 limit = intel_ironlake_limit(crtc);
 702         else if (IS_G4X(dev)) {
 703                 limit = intel_g4x_limit(crtc);
 704         } else if (IS_I9XX(dev) && !IS_PINEVIEW(dev)) {
 705                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 706                         limit = &intel_limits_i9xx_lvds;
 707                 else
 708                         limit = &intel_limits_i9xx_sdvo;
 709         } else if (IS_PINEVIEW(dev)) {
 710                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 711                         limit = &intel_limits_pineview_lvds;
 712                 else
 713                         limit = &intel_limits_pineview_sdvo;
 714         } else {
 715                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 716                         limit = &intel_limits_i8xx_lvds;
 717                 else
 718                         limit = &intel_limits_i8xx_dvo;
 719         }
 720         return limit;
 721 }
 722
 723 /* m1 is reserved as 0 in Pineview, n is a ring counter */
 724 static void pineview_clock(int refclk, intel_clock_t *clock)
 725 {
 726         clock->m = clock->m2 + 2;
 727         clock->p = clock->p1 * clock->p2;
 728         clock->vco = refclk * clock->m / clock->n;
 729         clock->dot = clock->vco / clock->p;
 730 }
 731
 732 static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
 733 {
 734         if (IS_PINEVIEW(dev)) {
 735                 pineview_clock(refclk, clock);
 736                 return;
 737         }
 738         clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
 739         clock->p = clock->p1 * clock->p2;
 740         clock->vco = refclk * clock->m / (clock->n + 2);
 741         clock->dot = clock->vco / clock->p;
 742 }
 743
 744 /**
 745  * Returns whether any output on the specified pipe is of the specified type
 746  */
 747 bool intel_pipe_has_type (struct drm_crtc *crtc, int type)
 748 {
 749     struct drm_device *dev = crtc->dev;
 750     struct drm_mode_config *mode_config = &dev->mode_config;
 751     struct drm_encoder *l_entry;
 752
 753     list_for_each_entry(l_entry, &mode_config->encoder_list, head) {
 754             if (l_entry && l_entry->crtc == crtc) {
 755                     struct intel_encoder *intel_encoder = enc_to_intel_encoder(l_entry);
 756                     if (intel_encoder->type == type)
 757                             return true;
 758             }
 759     }
 760     return false;
 761 }
 762
 763 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
 764 /**
 765  * Returns whether the given set of divisors are valid for a given refclk with
 766  * the given connectors.
 767  */
 768
 769 static bool intel_PLL_is_valid(struct drm_crtc *crtc, intel_clock_t *clock)
 770 {
 771         const intel_limit_t *limit = intel_limit (crtc);
 772         struct drm_device *dev = crtc->dev;
 773
 774         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
 775                 INTELPllInvalid ("p1 out of range\n");
 776         if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
 777                 INTELPllInvalid ("p out of range\n");
 778         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
 779                 INTELPllInvalid ("m2 out of range\n");
 780         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
 781                 INTELPllInvalid ("m1 out of range\n");
 782         if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
 783                 INTELPllInvalid ("m1 <= m2\n");
 784         if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
 785                 INTELPllInvalid ("m out of range\n");
 786         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
 787                 INTELPllInvalid ("n out of range\n");
 788         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 789                 INTELPllInvalid ("vco out of range\n");
 790         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
 791          * connector, etc., rather than just a single range.
 792          */
 793         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 794                 INTELPllInvalid ("dot out of range\n");
 795
 796         return true;
 797 }
 798
 799 static bool
 800 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 801                     int target, int refclk, intel_clock_t *best_clock)
 802
 803 {
 804         struct drm_device *dev = crtc->dev;
 805         struct drm_i915_private *dev_priv = dev->dev_private;
 806         intel_clock_t clock;
 807         int err = target;
 808
 809         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
 810             (I915_READ(LVDS)) != 0) {
 811                 /*
 812                  * For LVDS, if the panel is on, just rely on its current
 813                  * settings for dual-channel.  We haven't figured out how to
 814                  * reliably set up different single/dual channel state, if we
 815                  * even can.
 816                  */
 817                 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
 818                     LVDS_CLKB_POWER_UP)
 819                         clock.p2 = limit->p2.p2_fast;
 820                 else
 821                         clock.p2 = limit->p2.p2_slow;
 822         } else {
 823                 if (target < limit->p2.dot_limit)
 824                         clock.p2 = limit->p2.p2_slow;
 825                 else
 826                         clock.p2 = limit->p2.p2_fast;
 827         }
 828
 829         memset (best_clock, 0, sizeof (*best_clock));
 830
 831         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 832              clock.m1++) {
 833                 for (clock.m2 = limit->m2.min;
 834                      clock.m2 <= limit->m2.max; clock.m2++) {
 835                         /* m1 is always 0 in Pineview */
 836                         if (clock.m2 >= clock.m1 && !IS_PINEVIEW(dev))
 837                                 break;
 838                         for (clock.n = limit->n.min;
 839                              clock.n <= limit->n.max; clock.n++) {
 840                                 for (clock.p1 = limit->p1.min;
 841                                         clock.p1 <= limit->p1.max; clock.p1++) {
 842                                         int this_err;
 843
 844                                         intel_clock(dev, refclk, &clock);
 845
 846                                         if (!intel_PLL_is_valid(crtc, &clock))
 847                                                 continue;
 848
 849                                         this_err = abs(clock.dot - target);
 850                                         if (this_err < err) {
 851                                                 *best_clock = clock;
 852                                                 err = this_err;
 853                                         }
 854                                 }
 855                         }
 856                 }
 857         }
 858
 859         return (err != target);
 860 }
 861
 862 static bool
 863 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 864                         int target, int refclk, intel_clock_t *best_clock)
 865 {
 866         struct drm_device *dev = crtc->dev;
 867         struct drm_i915_private *dev_priv = dev->dev_private;
 868         intel_clock_t clock;
 869         int max_n;
 870         bool found;
 871         /* approximately equals target * 0.00585 */
 872         int err_most = (target >> 8) + (target >> 9);
 873         found = false;
 874
 875         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 876                 int lvds_reg;
 877
 878                 if (HAS_PCH_SPLIT(dev))
 879                         lvds_reg = PCH_LVDS;
 880                 else
 881                         lvds_reg = LVDS;
 882                 if ((I915_READ(lvds_reg) & LVDS_CLKB_POWER_MASK) ==
 883                     LVDS_CLKB_POWER_UP)
 884                         clock.p2 = limit->p2.p2_fast;
 885                 else
 886                         clock.p2 = limit->p2.p2_slow;
 887         } else {
 888                 if (target < limit->p2.dot_limit)
 889                         clock.p2 = limit->p2.p2_slow;
 890                 else
 891                         clock.p2 = limit->p2.p2_fast;
 892         }
 893
 894         memset(best_clock, 0, sizeof(*best_clock));
 895         max_n = limit->n.max;
 896         /* based on hardware requirement, prefer smaller n to precision */
 897         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
 898                 /* based on hardware requirement, prefere larger m1,m2 */
 899                 for (clock.m1 = limit->m1.max;
 900                      clock.m1 >= limit->m1.min; clock.m1--) {
 901                         for (clock.m2 = limit->m2.max;
 902                              clock.m2 >= limit->m2.min; clock.m2--) {
 903                                 for (clock.p1 = limit->p1.max;
 904                                      clock.p1 >= limit->p1.min; clock.p1--) {
 905                                         int this_err;
 906
 907                                         intel_clock(dev, refclk, &clock);
 908                                         if (!intel_PLL_is_valid(crtc, &clock))
 909                                                 continue;
 910                                         this_err = abs(clock.dot - target) ;
 911                                         if (this_err < err_most) {
 912                                                 *best_clock = clock;
 913                                                 err_most = this_err;
 914                                                 max_n = clock.n;
 915                                                 found = true;
 916                                         }
 917                                 }
 918                         }
 919                 }
 920         }
 921         return found;
 922 }
 923
 924 static bool
 925 intel_find_pll_ironlake_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 926                            int target, int refclk, intel_clock_t *best_clock)
 927 {
 928         struct drm_device *dev = crtc->dev;
 929         intel_clock_t clock;
 930
 931         /* return directly when it is eDP */
 932         if (HAS_eDP)
 933                 return true;
 934
 935         if (target < 200000) {
 936                 clock.n = 1;
 937                 clock.p1 = 2;
 938                 clock.p2 = 10;
 939                 clock.m1 = 12;
 940                 clock.m2 = 9;
 941         } else {
 942                 clock.n = 2;
 943                 clock.p1 = 1;
 944                 clock.p2 = 10;
 945                 clock.m1 = 14;
 946                 clock.m2 = 8;
 947         }
 948         intel_clock(dev, refclk, &clock);
 949         memcpy(best_clock, &clock, sizeof(intel_clock_t));
 950         return true;
 951 }
 952
 953 /* DisplayPort has only two frequencies, 162MHz and 270MHz */
 954 static bool
 955 intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 956                       int target, int refclk, intel_clock_t *best_clock)
 957 {
 958     intel_clock_t clock;
 959     if (target < 200000) {
 960         clock.p1 = 2;
 961         clock.p2 = 10;
 962         clock.n = 2;
 963         clock.m1 = 23;
 964         clock.m2 = 8;
 965     } else {
 966         clock.p1 = 1;
 967         clock.p2 = 10;
 968         clock.n = 1;
 969         clock.m1 = 14;
 970         clock.m2 = 2;
 971     }
 972     clock.m = 5 * (clock.m1 + 2) + (clock.m2 + 2);
 973     clock.p = (clock.p1 * clock.p2);
 974     clock.dot = 96000 * clock.m / (clock.n + 2) / clock.p;
 975     clock.vco = 0;
 976     memcpy(best_clock, &clock, sizeof(intel_clock_t));
 977     return true;
 978 }
 979
 980 /**
 981  * intel_wait_for_vblank - wait for vblank on a given pipe
 982  * @dev: drm device
 983  * @pipe: pipe to wait for
 984  *
 985  * Wait for vblank to occur on a given pipe.  Needed for various bits of
 986  * mode setting code.
 987  */
 988 void intel_wait_for_vblank(struct drm_device *dev, int pipe)
 989 {
 990         struct drm_i915_private *dev_priv = dev->dev_private;
 991         int pipestat_reg = (pipe == 0 ? PIPEASTAT : PIPEBSTAT);
 992
 993         /* Clear existing vblank status. Note this will clear any other
 994          * sticky status fields as well.
 995          *
 996          * This races with i915_driver_irq_handler() with the result
 997          * that either function could miss a vblank event.  Here it is not
 998          * fatal, as we will either wait upon the next vblank interrupt or
 999          * timeout.  Generally speaking intel_wait_for_vblank() is only
1000          * called during modeset at which time the GPU should be idle and
1001          * should *not* be performing page flips and thus not waiting on
1002          * vblanks...
1003          * Currently, the result of us stealing a vblank from the irq
1004          * handler is that a single frame will be skipped during swapbuffers.
1005          */
1006         I915_WRITE(pipestat_reg,
1007                    I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
1008
1009         /* Wait for vblank interrupt bit to set */
1010         if (wait_for((I915_READ(pipestat_reg) &
1011                       PIPE_VBLANK_INTERRUPT_STATUS),
1012                      50, 0))
1013                 DRM_DEBUG_KMS("vblank wait timed out\n");
1014 }
1015
1016 /**
1017  * intel_wait_for_vblank_off - wait for vblank after disabling a pipe
1018  * @dev: drm device
1019  * @pipe: pipe to wait for
1020  *
1021  * After disabling a pipe, we can't wait for vblank in the usual way,
1022  * spinning on the vblank interrupt status bit, since we won't actually
1023  * see an interrupt when the pipe is disabled.
1024  *
1025  * So this function waits for the display line value to settle (it
1026  * usually ends up stopping at the start of the next frame).
1027  */
1028 void intel_wait_for_vblank_off(struct drm_device *dev, int pipe)
1029 {
1030         struct drm_i915_private *dev_priv = dev->dev_private;
1031         int pipedsl_reg = (pipe == 0 ? PIPEADSL : PIPEBDSL);
1032         unsigned long timeout = jiffies + msecs_to_jiffies(100);
1033         u32 last_line;
1034
1035         /* Wait for the display line to settle */
1036         do {
1037                 last_line = I915_READ(pipedsl_reg) & DSL_LINEMASK;
1038                 mdelay(5);
1039         } while (((I915_READ(pipedsl_reg) & DSL_LINEMASK) != last_line) &&
1040                  time_after(timeout, jiffies));
1041
1042         if (time_after(jiffies, timeout))
1043                 DRM_DEBUG_KMS("vblank wait timed out\n");
1044 }
1045
1046 /* Parameters have changed, update FBC info */
1047 static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1048 {
1049         struct drm_device *dev = crtc->dev;
1050         struct drm_i915_private *dev_priv = dev->dev_private;
1051         struct drm_framebuffer *fb = crtc->fb;
1052         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1053         struct drm_i915_gem_object *obj_priv = to_intel_bo(intel_fb->obj);
1054         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1055         int plane, i;
1056         u32 fbc_ctl, fbc_ctl2;
1057
1058         dev_priv->cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE;
1059
1060         if (fb->pitch < dev_priv->cfb_pitch)
1061                 dev_priv->cfb_pitch = fb->pitch;
1062
1063         /* FBC_CTL wants 64B units */
1064         dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
1065         dev_priv->cfb_fence = obj_priv->fence_reg;
1066         dev_priv->cfb_plane = intel_crtc->plane;
1067         plane = dev_priv->cfb_plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
1068
1069         /* Clear old tags */
1070         for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
1071                 I915_WRITE(FBC_TAG + (i * 4), 0);
1072
1073         /* Set it up... */
1074         fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | plane;
1075         if (obj_priv->tiling_mode != I915_TILING_NONE)
1076                 fbc_ctl2 |= FBC_CTL_CPU_FENCE;
1077         I915_WRITE(FBC_CONTROL2, fbc_ctl2);
1078         I915_WRITE(FBC_FENCE_OFF, crtc->y);
1079
1080         /* enable it... */
1081         fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;
1082         if (IS_I945GM(dev))
1083                 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
1084         fbc_ctl |= (dev_priv->cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
1085         fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;
1086         if (obj_priv->tiling_mode != I915_TILING_NONE)
1087                 fbc_ctl |= dev_priv->cfb_fence;
1088         I915_WRITE(FBC_CONTROL, fbc_ctl);
1089
1090         DRM_DEBUG_KMS("enabled FBC, pitch %ld, yoff %d, plane %d, ",
1091                   dev_priv->cfb_pitch, crtc->y, dev_priv->cfb_plane);
1092 }
1093
1094 void i8xx_disable_fbc(struct drm_device *dev)
1095 {
1096         struct drm_i915_private *dev_priv = dev->dev_private;
1097         u32 fbc_ctl;
1098
1099         if (!I915_HAS_FBC(dev))
1100                 return;
1101
1102         if (!(I915_READ(FBC_CONTROL) & FBC_CTL_EN))
1103                 return; /* Already off, just return */
1104
1105         /* Disable compression */
1106         fbc_ctl = I915_READ(FBC_CONTROL);
1107         fbc_ctl &= ~FBC_CTL_EN;
1108         I915_WRITE(FBC_CONTROL, fbc_ctl);
1109
1110         /* Wait for compressing bit to clear */
1111         if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10, 0)) {
1112                 DRM_DEBUG_KMS("FBC idle timed out\n");
1113                 return;
1114         }
1115
1116         DRM_DEBUG_KMS("disabled FBC\n");
1117 }
1118
1119 static bool i8xx_fbc_enabled(struct drm_device *dev)
1120 {
1121         struct drm_i915_private *dev_priv = dev->dev_private;
1122
1123         return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
1124 }
1125
1126 static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1127 {
1128         struct drm_device *dev = crtc->dev;
1129         struct drm_i915_private *dev_priv = dev->dev_private;
1130         struct drm_framebuffer *fb = crtc->fb;
1131         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1132         struct drm_i915_gem_object *obj_priv = to_intel_bo(intel_fb->obj);
1133         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1134         int plane = (intel_crtc->plane == 0 ? DPFC_CTL_PLANEA :
1135                      DPFC_CTL_PLANEB);
1136         unsigned long stall_watermark = 200;
1137         u32 dpfc_ctl;
1138
1139         dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
1140         dev_priv->cfb_fence = obj_priv->fence_reg;
1141         dev_priv->cfb_plane = intel_crtc->plane;
1142
1143         dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
1144         if (obj_priv->tiling_mode != I915_TILING_NONE) {
1145                 dpfc_ctl |= DPFC_CTL_FENCE_EN | dev_priv->cfb_fence;
1146                 I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
1147         } else {
1148                 I915_WRITE(DPFC_CHICKEN, ~DPFC_HT_MODIFY);
1149         }
1150
1151         I915_WRITE(DPFC_CONTROL, dpfc_ctl);
1152         I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
1153                    (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
1154                    (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
1155         I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
1156
1157         /* enable it... */
1158         I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);
1159
1160         DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
1161 }
1162
1163 void g4x_disable_fbc(struct drm_device *dev)
1164 {
1165         struct drm_i915_private *dev_priv = dev->dev_private;
1166         u32 dpfc_ctl;
1167
1168         /* Disable compression */
1169         dpfc_ctl = I915_READ(DPFC_CONTROL);
1170         dpfc_ctl &= ~DPFC_CTL_EN;
1171         I915_WRITE(DPFC_CONTROL, dpfc_ctl);
1172
1173         DRM_DEBUG_KMS("disabled FBC\n");
1174 }
1175
1176 static bool g4x_fbc_enabled(struct drm_device *dev)
1177 {
1178         struct drm_i915_private *dev_priv = dev->dev_private;
1179
1180         return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
1181 }
1182
1183 static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1184 {
1185         struct drm_device *dev = crtc->dev;
1186         struct drm_i915_private *dev_priv = dev->dev_private;
1187         struct drm_framebuffer *fb = crtc->fb;
1188         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1189         struct drm_i915_gem_object *obj_priv = to_intel_bo(intel_fb->obj);
1190         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1191         int plane = (intel_crtc->plane == 0) ? DPFC_CTL_PLANEA :
1192                                                DPFC_CTL_PLANEB;
1193         unsigned long stall_watermark = 200;
1194         u32 dpfc_ctl;
1195
1196         dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
1197         dev_priv->cfb_fence = obj_priv->fence_reg;
1198         dev_priv->cfb_plane = intel_crtc->plane;
1199
1200         dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
1201         dpfc_ctl &= DPFC_RESERVED;
1202         dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
1203         if (obj_priv->tiling_mode != I915_TILING_NONE) {
1204                 dpfc_ctl |= (DPFC_CTL_FENCE_EN | dev_priv->cfb_fence);
1205                 I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
1206         } else {
1207                 I915_WRITE(ILK_DPFC_CHICKEN, ~DPFC_HT_MODIFY);
1208         }
1209
1210         I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
1211         I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
1212                    (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
1213                    (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
1214         I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
1215         I915_WRITE(ILK_FBC_RT_BASE, obj_priv->gtt_offset | ILK_FBC_RT_VALID);
1216         /* enable it... */
1217         I915_WRITE(ILK_DPFC_CONTROL, I915_READ(ILK_DPFC_CONTROL) |
1218                    DPFC_CTL_EN);
1219
1220         DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
1221 }
1222
1223 void ironlake_disable_fbc(struct drm_device *dev)
1224 {
1225         struct drm_i915_private *dev_priv = dev->dev_private;
1226         u32 dpfc_ctl;
1227
1228         /* Disable compression */
1229         dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
1230         dpfc_ctl &= ~DPFC_CTL_EN;
1231         I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
1232
1233         DRM_DEBUG_KMS("disabled FBC\n");
1234 }
1235
1236 static bool ironlake_fbc_enabled(struct drm_device *dev)
1237 {
1238         struct drm_i915_private *dev_priv = dev->dev_private;
1239
1240         return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
1241 }
1242
1243 bool intel_fbc_enabled(struct drm_device *dev)
1244 {
1245         struct drm_i915_private *dev_priv = dev->dev_private;
1246
1247         if (!dev_priv->display.fbc_enabled)
1248                 return false;
1249
1250         return dev_priv->display.fbc_enabled(dev);
1251 }
1252
1253 void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1254 {
1255         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
1256
1257         if (!dev_priv->display.enable_fbc)
1258                 return;
1259
1260         dev_priv->display.enable_fbc(crtc, interval);
1261 }
1262
1263 void intel_disable_fbc(struct drm_device *dev)
1264 {
1265         struct drm_i915_private *dev_priv = dev->dev_private;
1266
1267         if (!dev_priv->display.disable_fbc)
1268                 return;
1269
1270         dev_priv->display.disable_fbc(dev);
1271 }
1272
1273 /**
1274  * intel_update_fbc - enable/disable FBC as needed
1275  * @crtc: CRTC to point the compressor at
1276  * @mode: mode in use
1277  *
1278  * Set up the framebuffer compression hardware at mode set time.  We
1279  * enable it if possible:
1280  *   - plane A only (on pre-965)
1281  *   - no pixel mulitply/line duplication
1282  *   - no alpha buffer discard
1283  *   - no dual wide
1284  *   - framebuffer <= 2048 in width, 1536 in height
1285  *
1286  * We can't assume that any compression will take place (worst case),
1287  * so the compressed buffer has to be the same size as the uncompressed
1288  * one.  It also must reside (along with the line length buffer) in
1289  * stolen memory.
1290  *
1291  * We need to enable/disable FBC on a global basis.
1292  */
1293 static void intel_update_fbc(struct drm_crtc *crtc,
1294                              struct drm_display_mode *mode)
1295 {
1296         struct drm_device *dev = crtc->dev;
1297         struct drm_i915_private *dev_priv = dev->dev_private;
1298         struct drm_framebuffer *fb = crtc->fb;
1299         struct intel_framebuffer *intel_fb;
1300         struct drm_i915_gem_object *obj_priv;
1301         struct drm_crtc *tmp_crtc;
1302         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1303         int plane = intel_crtc->plane;
1304         int crtcs_enabled = 0;
1305
1306         DRM_DEBUG_KMS("\n");
1307
1308         if (!i915_powersave)
1309                 return;
1310
1311         if (!I915_HAS_FBC(dev))
1312                 return;
1313
1314         if (!crtc->fb)
1315                 return;
1316
1317         intel_fb = to_intel_framebuffer(fb);
1318         obj_priv = to_intel_bo(intel_fb->obj);
1319
1320         /*
1321          * If FBC is already on, we just have to verify that we can
1322          * keep it that way...
1323          * Need to disable if:
1324          *   - more than one pipe is active
1325          *   - changing FBC params (stride, fence, mode)
1326          *   - new fb is too large to fit in compressed buffer
1327          *   - going to an unsupported config (interlace, pixel multiply, etc.)
1328          */
1329         list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
1330                 if (tmp_crtc->enabled)
1331                         crtcs_enabled++;
1332         }
1333         DRM_DEBUG_KMS("%d pipes active\n", crtcs_enabled);
1334         if (crtcs_enabled > 1) {
1335                 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
1336                 dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES;
1337                 goto out_disable;
1338         }
1339         if (intel_fb->obj->size > dev_priv->cfb_size) {
1340                 DRM_DEBUG_KMS("framebuffer too large, disabling "
1341                                 "compression\n");
1342                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1343                 goto out_disable;
1344         }
1345         if ((mode->flags & DRM_MODE_FLAG_INTERLACE) ||
1346             (mode->flags & DRM_MODE_FLAG_DBLSCAN)) {
1347                 DRM_DEBUG_KMS("mode incompatible with compression, "
1348                                 "disabling\n");
1349                 dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE;
1350                 goto out_disable;
1351         }
1352         if ((mode->hdisplay > 2048) ||
1353             (mode->vdisplay > 1536)) {
1354                 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
1355                 dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE;
1356                 goto out_disable;
1357         }
1358         if ((IS_I915GM(dev) || IS_I945GM(dev)) && plane != 0) {
1359                 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
1360                 dev_priv->no_fbc_reason = FBC_BAD_PLANE;
1361                 goto out_disable;
1362         }
1363         if (obj_priv->tiling_mode != I915_TILING_X) {
1364                 DRM_DEBUG_KMS("framebuffer not tiled, disabling compression\n");
1365                 dev_priv->no_fbc_reason = FBC_NOT_TILED;
1366                 goto out_disable;
1367         }
1368
1369         /* If the kernel debugger is active, always disable compression */
1370         if (in_dbg_master())
1371                 goto out_disable;
1372
1373         if (intel_fbc_enabled(dev)) {
1374                 /* We can re-enable it in this case, but need to update pitch */
1375                 if ((fb->pitch > dev_priv->cfb_pitch) ||
1376                     (obj_priv->fence_reg != dev_priv->cfb_fence) ||
1377                     (plane != dev_priv->cfb_plane))
1378                         intel_disable_fbc(dev);
1379         }
1380
1381         /* Now try to turn it back on if possible */
1382         if (!intel_fbc_enabled(dev))
1383                 intel_enable_fbc(crtc, 500);
1384
1385         return;
1386
1387 out_disable:
1388         /* Multiple disables should be harmless */
1389         if (intel_fbc_enabled(dev)) {
1390                 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
1391                 intel_disable_fbc(dev);
1392         }
1393 }
1394
1395 int
1396 intel_pin_and_fence_fb_obj(struct drm_device *dev, struct drm_gem_object *obj)
1397 {
1398         struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
1399         u32 alignment;
1400         int ret;
1401
1402         switch (obj_priv->tiling_mode) {
1403         case I915_TILING_NONE:
1404                 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1405                         alignment = 128 * 1024;
1406                 else if (IS_I965G(dev))
1407                         alignment = 4 * 1024;
1408                 else
1409                         alignment = 64 * 1024;
1410                 break;
1411         case I915_TILING_X:
1412                 /* pin() will align the object as required by fence */
1413                 alignment = 0;
1414                 break;
1415         case I915_TILING_Y:
1416                 /* FIXME: Is this true? */
1417                 DRM_ERROR("Y tiled not allowed for scan out buffers\n");
1418                 return -EINVAL;
1419         default:
1420                 BUG();
1421         }
1422
1423         ret = i915_gem_object_pin(obj, alignment);
1424         if (ret != 0)
1425                 return ret;
1426
1427         /* Install a fence for tiled scan-out. Pre-i965 always needs a
1428          * fence, whereas 965+ only requires a fence if using
1429          * framebuffer compression.  For simplicity, we always install
1430          * a fence as the cost is not that onerous.
1431          */
1432         if (obj_priv->fence_reg == I915_FENCE_REG_NONE &&
1433             obj_priv->tiling_mode != I915_TILING_NONE) {
1434                 ret = i915_gem_object_get_fence_reg(obj);
1435                 if (ret != 0) {
1436                         i915_gem_object_unpin(obj);
1437                         return ret;
1438                 }
1439         }
1440
1441         return 0;
1442 }
1443
1444 /* Assume fb object is pinned & idle & fenced and just update base pointers */
1445 static int
1446 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
1447                            int x, int y)
1448 {
1449         struct drm_device *dev = crtc->dev;
1450         struct drm_i915_private *dev_priv = dev->dev_private;
1451         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1452         struct intel_framebuffer *intel_fb;
1453         struct drm_i915_gem_object *obj_priv;
1454         struct drm_gem_object *obj;
1455         int plane = intel_crtc->plane;
1456         unsigned long Start, Offset;
1457         int dspbase = (plane == 0 ? DSPAADDR : DSPBADDR);
1458         int dspsurf = (plane == 0 ? DSPASURF : DSPBSURF);
1459         int dspstride = (plane == 0) ? DSPASTRIDE : DSPBSTRIDE;
1460         int dsptileoff = (plane == 0 ? DSPATILEOFF : DSPBTILEOFF);
1461         int dspcntr_reg = (plane == 0) ? DSPACNTR : DSPBCNTR;
1462         u32 dspcntr;
1463
1464         switch (plane) {
1465         case 0:
1466         case 1:
1467                 break;
1468         default:
1469                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
1470                 return -EINVAL;
1471         }
1472
1473         intel_fb = to_intel_framebuffer(fb);
1474         obj = intel_fb->obj;
1475         obj_priv = to_intel_bo(obj);
1476
1477         dspcntr = I915_READ(dspcntr_reg);
1478         /* Mask out pixel format bits in case we change it */
1479         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
1480         switch (fb->bits_per_pixel) {
1481         case 8:
1482                 dspcntr |= DISPPLANE_8BPP;
1483                 break;
1484         case 16:
1485                 if (fb->depth == 15)
1486                         dspcntr |= DISPPLANE_15_16BPP;
1487                 else
1488                         dspcntr |= DISPPLANE_16BPP;
1489                 break;
1490         case 24:
1491         case 32:
1492                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
1493                 break;
1494         default:
1495                 DRM_ERROR("Unknown color depth\n");
1496                 return -EINVAL;
1497         }
1498         if (IS_I965G(dev)) {
1499                 if (obj_priv->tiling_mode != I915_TILING_NONE)
1500                         dspcntr |= DISPPLANE_TILED;
1501                 else
1502                         dspcntr &= ~DISPPLANE_TILED;
1503         }
1504
1505         if (HAS_PCH_SPLIT(dev))
1506                 /* must disable */
1507                 dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
1508
1509         I915_WRITE(dspcntr_reg, dspcntr);
1510
1511         Start = obj_priv->gtt_offset;
1512         Offset = y * fb->pitch + x * (fb->bits_per_pixel / 8);
1513
1514         DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
1515                       Start, Offset, x, y, fb->pitch);
1516         I915_WRITE(dspstride, fb->pitch);
1517         if (IS_I965G(dev)) {
1518                 I915_WRITE(dspsurf, Start);
1519                 I915_WRITE(dsptileoff, (y << 16) | x);
1520                 I915_WRITE(dspbase, Offset);
1521         } else {
1522                 I915_WRITE(dspbase, Start + Offset);
1523         }
1524         POSTING_READ(dspbase);
1525
1526         if (IS_I965G(dev) || plane == 0)
1527                 intel_update_fbc(crtc, &crtc->mode);
1528
1529         intel_wait_for_vblank(dev, intel_crtc->pipe);
1530         intel_increase_pllclock(crtc, true);
1531
1532         return 0;
1533 }
1534
1535 static int
1536 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
1537                     struct drm_framebuffer *old_fb)
1538 {
1539         struct drm_device *dev = crtc->dev;
1540         struct drm_i915_master_private *master_priv;
1541         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1542         struct intel_framebuffer *intel_fb;
1543         struct drm_i915_gem_object *obj_priv;
1544         struct drm_gem_object *obj;
1545         int pipe = intel_crtc->pipe;
1546         int plane = intel_crtc->plane;
1547         int ret;
1548
1549         /* no fb bound */
1550         if (!crtc->fb) {
1551                 DRM_DEBUG_KMS("No FB bound\n");
1552                 return 0;
1553         }
1554
1555         switch (plane) {
1556         case 0:
1557         case 1:
1558                 break;
1559         default:
1560                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
1561                 return -EINVAL;
1562         }
1563
1564         intel_fb = to_intel_framebuffer(crtc->fb);
1565         obj = intel_fb->obj;
1566         obj_priv = to_intel_bo(obj);
1567
1568         mutex_lock(&dev->struct_mutex);
1569         ret = intel_pin_and_fence_fb_obj(dev, obj);
1570         if (ret != 0) {
1571                 mutex_unlock(&dev->struct_mutex);
1572                 return ret;
1573         }
1574
1575         ret = i915_gem_object_set_to_display_plane(obj);
1576         if (ret != 0) {
1577                 i915_gem_object_unpin(obj);
1578                 mutex_unlock(&dev->struct_mutex);
1579                 return ret;
1580         }
1581
1582         ret = intel_pipe_set_base_atomic(crtc, crtc->fb, x, y);
1583         if (ret) {
1584                 i915_gem_object_unpin(obj);
1585                 mutex_unlock(&dev->struct_mutex);
1586                 return ret;
1587         }
1588
1589         if (old_fb) {
1590                 intel_fb = to_intel_framebuffer(old_fb);
1591                 obj_priv = to_intel_bo(intel_fb->obj);
1592                 i915_gem_object_unpin(intel_fb->obj);
1593         }
1594
1595         mutex_unlock(&dev->struct_mutex);
1596
1597         if (!dev->primary->master)
1598                 return 0;
1599
1600         master_priv = dev->primary->master->driver_priv;
1601         if (!master_priv->sarea_priv)
1602                 return 0;
1603
1604         if (pipe) {
1605                 master_priv->sarea_priv->pipeB_x = x;
1606                 master_priv->sarea_priv->pipeB_y = y;
1607         } else {
1608                 master_priv->sarea_priv->pipeA_x = x;
1609                 master_priv->sarea_priv->pipeA_y = y;
1610         }
1611
1612         return 0;
1613 }
1614
1615 static void ironlake_set_pll_edp (struct drm_crtc *crtc, int clock)
1616 {
1617         struct drm_device *dev = crtc->dev;
1618         struct drm_i915_private *dev_priv = dev->dev_private;
1619         u32 dpa_ctl;
1620
1621         DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", clock);
1622         dpa_ctl = I915_READ(DP_A);
1623         dpa_ctl &= ~DP_PLL_FREQ_MASK;
1624
1625         if (clock < 200000) {
1626                 u32 temp;
1627                 dpa_ctl |= DP_PLL_FREQ_160MHZ;
1628                 /* workaround for 160Mhz:
1629                    1) program 0x4600c bits 15:0 = 0x8124
1630                    2) program 0x46010 bit 0 = 1
1631                    3) program 0x46034 bit 24 = 1
1632                    4) program 0x64000 bit 14 = 1
1633                    */
1634                 temp = I915_READ(0x4600c);
1635                 temp &= 0xffff0000;
1636                 I915_WRITE(0x4600c, temp | 0x8124);
1637
1638                 temp = I915_READ(0x46010);
1639                 I915_WRITE(0x46010, temp | 1);
1640
1641                 temp = I915_READ(0x46034);
1642                 I915_WRITE(0x46034, temp | (1 << 24));
1643         } else {
1644                 dpa_ctl |= DP_PLL_FREQ_270MHZ;
1645         }
1646         I915_WRITE(DP_A, dpa_ctl);
1647
1648         udelay(500);
1649 }
1650
1651 /* The FDI link training functions for ILK/Ibexpeak. */
1652 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
1653 {
1654         struct drm_device *dev = crtc->dev;
1655         struct drm_i915_private *dev_priv = dev->dev_private;
1656         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1657         int pipe = intel_crtc->pipe;
1658         int fdi_tx_reg = (pipe == 0) ? FDI_TXA_CTL : FDI_TXB_CTL;
1659         int fdi_rx_reg = (pipe == 0) ? FDI_RXA_CTL : FDI_RXB_CTL;
1660         int fdi_rx_iir_reg = (pipe == 0) ? FDI_RXA_IIR : FDI_RXB_IIR;
1661         int fdi_rx_imr_reg = (pipe == 0) ? FDI_RXA_IMR : FDI_RXB_IMR;
1662         u32 temp, tries = 0;
1663
1664         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
1665            for train result */
1666         temp = I915_READ(fdi_rx_imr_reg);
1667         temp &= ~FDI_RX_SYMBOL_LOCK;
1668         temp &= ~FDI_RX_BIT_LOCK;
1669         I915_WRITE(fdi_rx_imr_reg, temp);
1670         I915_READ(fdi_rx_imr_reg);
1671         udelay(150);
1672
1673         /* enable CPU FDI TX and PCH FDI RX */
1674         temp = I915_READ(fdi_tx_reg);
1675         temp |= FDI_TX_ENABLE;
1676         temp &= ~(7 << 19);
1677         temp |= (intel_crtc->fdi_lanes - 1) << 19;
1678         temp &= ~FDI_LINK_TRAIN_NONE;
1679         temp |= FDI_LINK_TRAIN_PATTERN_1;
1680         I915_WRITE(fdi_tx_reg, temp);
1681         I915_READ(fdi_tx_reg);
1682
1683         temp = I915_READ(fdi_rx_reg);
1684         temp &= ~FDI_LINK_TRAIN_NONE;
1685         temp |= FDI_LINK_TRAIN_PATTERN_1;
1686         I915_WRITE(fdi_rx_reg, temp | FDI_RX_ENABLE);
1687         I915_READ(fdi_rx_reg);
1688         udelay(150);
1689
1690         for (tries = 0; tries < 5; tries++) {
1691                 temp = I915_READ(fdi_rx_iir_reg);
1692                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1693
1694                 if ((temp & FDI_RX_BIT_LOCK)) {
1695                         DRM_DEBUG_KMS("FDI train 1 done.\n");
1696                         I915_WRITE(fdi_rx_iir_reg,
1697                                    temp | FDI_RX_BIT_LOCK);
1698                         break;
1699                 }
1700         }
1701         if (tries == 5)
1702                 DRM_DEBUG_KMS("FDI train 1 fail!\n");
1703
1704         /* Train 2 */
1705         temp = I915_READ(fdi_tx_reg);
1706         temp &= ~FDI_LINK_TRAIN_NONE;
1707         temp |= FDI_LINK_TRAIN_PATTERN_2;
1708         I915_WRITE(fdi_tx_reg, temp);
1709
1710         temp = I915_READ(fdi_rx_reg);
1711         temp &= ~FDI_LINK_TRAIN_NONE;
1712         temp |= FDI_LINK_TRAIN_PATTERN_2;
1713         I915_WRITE(fdi_rx_reg, temp);
1714         udelay(150);
1715
1716         tries = 0;
1717
1718         for (tries = 0; tries < 5; tries++) {
1719                 temp = I915_READ(fdi_rx_iir_reg);
1720                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1721
1722                 if (temp & FDI_RX_SYMBOL_LOCK) {
1723                         I915_WRITE(fdi_rx_iir_reg,
1724                                    temp | FDI_RX_SYMBOL_LOCK);
1725                         DRM_DEBUG_KMS("FDI train 2 done.\n");
1726                         break;
1727                 }
1728         }
1729         if (tries == 5)
1730                 DRM_DEBUG_KMS("FDI train 2 fail!\n");
1731
1732         DRM_DEBUG_KMS("FDI train done\n");
1733 }
1734
1735 static int snb_b_fdi_train_param [] = {
1736         FDI_LINK_TRAIN_400MV_0DB_SNB_B,
1737         FDI_LINK_TRAIN_400MV_6DB_SNB_B,
1738         FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
1739         FDI_LINK_TRAIN_800MV_0DB_SNB_B,
1740 };
1741
1742 /* The FDI link training functions for SNB/Cougarpoint. */
1743 static void gen6_fdi_link_train(struct drm_crtc *crtc)
1744 {
1745         struct drm_device *dev = crtc->dev;
1746         struct drm_i915_private *dev_priv = dev->dev_private;
1747         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1748         int pipe = intel_crtc->pipe;
1749         int fdi_tx_reg = (pipe == 0) ? FDI_TXA_CTL : FDI_TXB_CTL;
1750         int fdi_rx_reg = (pipe == 0) ? FDI_RXA_CTL : FDI_RXB_CTL;
1751         int fdi_rx_iir_reg = (pipe == 0) ? FDI_RXA_IIR : FDI_RXB_IIR;
1752         int fdi_rx_imr_reg = (pipe == 0) ? FDI_RXA_IMR : FDI_RXB_IMR;
1753         u32 temp, i;
1754
1755         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
1756            for train result */
1757         temp = I915_READ(fdi_rx_imr_reg);
1758         temp &= ~FDI_RX_SYMBOL_LOCK;
1759         temp &= ~FDI_RX_BIT_LOCK;
1760         I915_WRITE(fdi_rx_imr_reg, temp);
1761         I915_READ(fdi_rx_imr_reg);
1762         udelay(150);
1763
1764         /* enable CPU FDI TX and PCH FDI RX */
1765         temp = I915_READ(fdi_tx_reg);
1766         temp |= FDI_TX_ENABLE;
1767         temp &= ~(7 << 19);
1768         temp |= (intel_crtc->fdi_lanes - 1) << 19;
1769         temp &= ~FDI_LINK_TRAIN_NONE;
1770         temp |= FDI_LINK_TRAIN_PATTERN_1;
1771         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1772         /* SNB-B */
1773         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
1774         I915_WRITE(fdi_tx_reg, temp);
1775         I915_READ(fdi_tx_reg);
1776
1777         temp = I915_READ(fdi_rx_reg);
1778         if (HAS_PCH_CPT(dev)) {
1779                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
1780                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
1781         } else {
1782                 temp &= ~FDI_LINK_TRAIN_NONE;
1783                 temp |= FDI_LINK_TRAIN_PATTERN_1;
1784         }
1785         I915_WRITE(fdi_rx_reg, temp | FDI_RX_ENABLE);
1786         I915_READ(fdi_rx_reg);
1787         udelay(150);
1788
1789         for (i = 0; i < 4; i++ ) {
1790                 temp = I915_READ(fdi_tx_reg);
1791                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1792                 temp |= snb_b_fdi_train_param[i];
1793                 I915_WRITE(fdi_tx_reg, temp);
1794                 udelay(500);
1795
1796                 temp = I915_READ(fdi_rx_iir_reg);
1797                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1798
1799                 if (temp & FDI_RX_BIT_LOCK) {
1800                         I915_WRITE(fdi_rx_iir_reg,
1801                                    temp | FDI_RX_BIT_LOCK);
1802                         DRM_DEBUG_KMS("FDI train 1 done.\n");
1803                         break;
1804                 }
1805         }
1806         if (i == 4)
1807                 DRM_DEBUG_KMS("FDI train 1 fail!\n");
1808
1809         /* Train 2 */
1810         temp = I915_READ(fdi_tx_reg);
1811         temp &= ~FDI_LINK_TRAIN_NONE;
1812         temp |= FDI_LINK_TRAIN_PATTERN_2;
1813         if (IS_GEN6(dev)) {
1814                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1815                 /* SNB-B */
1816                 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
1817         }
1818         I915_WRITE(fdi_tx_reg, temp);
1819
1820         temp = I915_READ(fdi_rx_reg);
1821         if (HAS_PCH_CPT(dev)) {
1822                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
1823                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
1824         } else {
1825                 temp &= ~FDI_LINK_TRAIN_NONE;
1826                 temp |= FDI_LINK_TRAIN_PATTERN_2;
1827         }
1828         I915_WRITE(fdi_rx_reg, temp);
1829         udelay(150);
1830
1831         for (i = 0; i < 4; i++ ) {
1832                 temp = I915_READ(fdi_tx_reg);
1833                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1834                 temp |= snb_b_fdi_train_param[i];
1835                 I915_WRITE(fdi_tx_reg, temp);
1836                 udelay(500);
1837
1838                 temp = I915_READ(fdi_rx_iir_reg);
1839                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1840
1841                 if (temp & FDI_RX_SYMBOL_LOCK) {
1842                         I915_WRITE(fdi_rx_iir_reg,
1843                                    temp | FDI_RX_SYMBOL_LOCK);
1844                         DRM_DEBUG_KMS("FDI train 2 done.\n");
1845                         break;
1846                 }
1847         }
1848         if (i == 4)
1849                 DRM_DEBUG_KMS("FDI train 2 fail!\n");
1850
1851         DRM_DEBUG_KMS("FDI train done.\n");
1852 }
1853
1854 static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
1855 {
1856         struct drm_device *dev = crtc->dev;
1857         struct drm_i915_private *dev_priv = dev->dev_private;
1858         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1859         int pipe = intel_crtc->pipe;
1860         int plane = intel_crtc->plane;
1861         int pch_dpll_reg = (pipe == 0) ? PCH_DPLL_A : PCH_DPLL_B;
1862         int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
1863         int dspcntr_reg = (plane == 0) ? DSPACNTR : DSPBCNTR;
1864         int dspbase_reg = (plane == 0) ? DSPAADDR : DSPBADDR;
1865         int fdi_tx_reg = (pipe == 0) ? FDI_TXA_CTL : FDI_TXB_CTL;
1866         int fdi_rx_reg = (pipe == 0) ? FDI_RXA_CTL : FDI_RXB_CTL;
1867         int transconf_reg = (pipe == 0) ? TRANSACONF : TRANSBCONF;
1868         int cpu_htot_reg = (pipe == 0) ? HTOTAL_A : HTOTAL_B;
1869         int cpu_hblank_reg = (pipe == 0) ? HBLANK_A : HBLANK_B;
1870         int cpu_hsync_reg = (pipe == 0) ? HSYNC_A : HSYNC_B;
1871         int cpu_vtot_reg = (pipe == 0) ? VTOTAL_A : VTOTAL_B;
1872         int cpu_vblank_reg = (pipe == 0) ? VBLANK_A : VBLANK_B;
1873         int cpu_vsync_reg = (pipe == 0) ? VSYNC_A : VSYNC_B;
1874         int trans_htot_reg = (pipe == 0) ? TRANS_HTOTAL_A : TRANS_HTOTAL_B;
1875         int trans_hblank_reg = (pipe == 0) ? TRANS_HBLANK_A : TRANS_HBLANK_B;
1876         int trans_hsync_reg = (pipe == 0) ? TRANS_HSYNC_A : TRANS_HSYNC_B;
1877         int trans_vtot_reg = (pipe == 0) ? TRANS_VTOTAL_A : TRANS_VTOTAL_B;
1878         int trans_vblank_reg = (pipe == 0) ? TRANS_VBLANK_A : TRANS_VBLANK_B;
1879         int trans_vsync_reg = (pipe == 0) ? TRANS_VSYNC_A : TRANS_VSYNC_B;
1880         int trans_dpll_sel = (pipe == 0) ? 0 : 1;
1881         u32 temp;
1882         u32 pipe_bpc;
1883
1884         temp = I915_READ(pipeconf_reg);
1885         pipe_bpc = temp & PIPE_BPC_MASK;
1886
1887         /* XXX: When our outputs are all unaware of DPMS modes other than off
1888          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
1889          */
1890         switch (mode) {
1891         case DRM_MODE_DPMS_ON:
1892         case DRM_MODE_DPMS_STANDBY:
1893         case DRM_MODE_DPMS_SUSPEND:
1894                 DRM_DEBUG_KMS("crtc %d/%d dpms on\n", pipe, plane);
1895
1896                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
1897                         temp = I915_READ(PCH_LVDS);
1898                         if ((temp & LVDS_PORT_EN) == 0) {
1899                                 I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
1900                                 POSTING_READ(PCH_LVDS);
1901                         }
1902                 }
1903
1904                 if (!HAS_eDP) {
1905
1906                         /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
1907                         temp = I915_READ(fdi_rx_reg);
1908                         /*
1909                          * make the BPC in FDI Rx be consistent with that in
1910                          * pipeconf reg.
1911                          */
1912                         temp &= ~(0x7 << 16);
1913                         temp |= (pipe_bpc << 11);
1914                         temp &= ~(7 << 19);
1915                         temp |= (intel_crtc->fdi_lanes - 1) << 19;
1916                         I915_WRITE(fdi_rx_reg, temp | FDI_RX_PLL_ENABLE);
1917                         I915_READ(fdi_rx_reg);
1918                         udelay(200);
1919
1920                         /* Switch from Rawclk to PCDclk */
1921                         temp = I915_READ(fdi_rx_reg);
1922                         I915_WRITE(fdi_rx_reg, temp | FDI_SEL_PCDCLK);
1923                         I915_READ(fdi_rx_reg);
1924                         udelay(200);
1925
1926                         /* Enable CPU FDI TX PLL, always on for Ironlake */
1927                         temp = I915_READ(fdi_tx_reg);
1928                         if ((temp & FDI_TX_PLL_ENABLE) == 0) {
1929                                 I915_WRITE(fdi_tx_reg, temp | FDI_TX_PLL_ENABLE);
1930                                 I915_READ(fdi_tx_reg);
1931                                 udelay(100);
1932                         }
1933                 }
1934
1935                 /* Enable panel fitting for LVDS */
1936                 if (dev_priv->pch_pf_size &&
1937                     (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)
1938                     || HAS_eDP || intel_pch_has_edp(crtc))) {
1939                         /* Force use of hard-coded filter coefficients
1940                          * as some pre-programmed values are broken,
1941                          * e.g. x201.
1942                          */
1943                         I915_WRITE(pipe ? PFB_CTL_1 : PFA_CTL_1,
1944                                    PF_ENABLE | PF_FILTER_MED_3x3);
1945                         I915_WRITE(pipe ? PFB_WIN_POS : PFA_WIN_POS,
1946                                    dev_priv->pch_pf_pos);
1947                         I915_WRITE(pipe ? PFB_WIN_SZ : PFA_WIN_SZ,
1948                                    dev_priv->pch_pf_size);
1949                 }
1950
1951                 /* Enable CPU pipe */
1952                 temp = I915_READ(pipeconf_reg);
1953                 if ((temp & PIPEACONF_ENABLE) == 0) {
1954                         I915_WRITE(pipeconf_reg, temp | PIPEACONF_ENABLE);
1955                         I915_READ(pipeconf_reg);
1956                         udelay(100);
1957                 }
1958
1959                 /* configure and enable CPU plane */
1960                 temp = I915_READ(dspcntr_reg);
1961                 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
1962                         I915_WRITE(dspcntr_reg, temp | DISPLAY_PLANE_ENABLE);
1963                         /* Flush the plane changes */
1964                         I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
1965                 }
1966
1967                 if (!HAS_eDP) {
1968                         /* For PCH output, training FDI link */
1969                         if (IS_GEN6(dev))
1970                                 gen6_fdi_link_train(crtc);
1971                         else
1972                                 ironlake_fdi_link_train(crtc);
1973
1974                         /* enable PCH DPLL */
1975                         temp = I915_READ(pch_dpll_reg);
1976                         if ((temp & DPLL_VCO_ENABLE) == 0) {
1977                                 I915_WRITE(pch_dpll_reg, temp | DPLL_VCO_ENABLE);
1978                                 I915_READ(pch_dpll_reg);
1979                         }
1980                         udelay(200);
1981
1982                         if (HAS_PCH_CPT(dev)) {
1983                                 /* Be sure PCH DPLL SEL is set */
1984                                 temp = I915_READ(PCH_DPLL_SEL);
1985                                 if (trans_dpll_sel == 0 &&
1986                                                 (temp & TRANSA_DPLL_ENABLE) == 0)
1987                                         temp |= (TRANSA_DPLL_ENABLE | TRANSA_DPLLA_SEL);
1988                                 else if (trans_dpll_sel == 1 &&
1989                                                 (temp & TRANSB_DPLL_ENABLE) == 0)
1990                                         temp |= (TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
1991                                 I915_WRITE(PCH_DPLL_SEL, temp);
1992                                 I915_READ(PCH_DPLL_SEL);
1993                         }
1994
1995                         /* set transcoder timing */
1996                         I915_WRITE(trans_htot_reg, I915_READ(cpu_htot_reg));
1997                         I915_WRITE(trans_hblank_reg, I915_READ(cpu_hblank_reg));
1998                         I915_WRITE(trans_hsync_reg, I915_READ(cpu_hsync_reg));
1999
2000                         I915_WRITE(trans_vtot_reg, I915_READ(cpu_vtot_reg));
2001                         I915_WRITE(trans_vblank_reg, I915_READ(cpu_vblank_reg));
2002                         I915_WRITE(trans_vsync_reg, I915_READ(cpu_vsync_reg));
2003
2004                         /* enable normal train */
2005                         temp = I915_READ(fdi_tx_reg);
2006                         temp &= ~FDI_LINK_TRAIN_NONE;
2007                         I915_WRITE(fdi_tx_reg, temp | FDI_LINK_TRAIN_NONE |
2008                                         FDI_TX_ENHANCE_FRAME_ENABLE);
2009                         I915_READ(fdi_tx_reg);
2010
2011                         temp = I915_READ(fdi_rx_reg);
2012                         if (HAS_PCH_CPT(dev)) {
2013                                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2014                                 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
2015                         } else {
2016                                 temp &= ~FDI_LINK_TRAIN_NONE;
2017                                 temp |= FDI_LINK_TRAIN_NONE;
2018                         }
2019                         I915_WRITE(fdi_rx_reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
2020                         I915_READ(fdi_rx_reg);
2021
2022                         /* wait one idle pattern time */
2023                         udelay(100);
2024
2025                         /* For PCH DP, enable TRANS_DP_CTL */
2026                         if (HAS_PCH_CPT(dev) &&
2027                             intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
2028                                 int trans_dp_ctl = (pipe == 0) ? TRANS_DP_CTL_A : TRANS_DP_CTL_B;
2029                                 int reg;
2030
2031                                 reg = I915_READ(trans_dp_ctl);
2032                                 reg &= ~(TRANS_DP_PORT_SEL_MASK |
2033                                          TRANS_DP_SYNC_MASK);
2034                                 reg |= (TRANS_DP_OUTPUT_ENABLE |
2035                                         TRANS_DP_ENH_FRAMING);
2036
2037                                 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
2038                                       reg |= TRANS_DP_HSYNC_ACTIVE_HIGH;
2039                                 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
2040                                       reg |= TRANS_DP_VSYNC_ACTIVE_HIGH;
2041
2042                                 switch (intel_trans_dp_port_sel(crtc)) {
2043                                 case PCH_DP_B:
2044                                         reg |= TRANS_DP_PORT_SEL_B;
2045                                         break;
2046                                 case PCH_DP_C:
2047                                         reg |= TRANS_DP_PORT_SEL_C;
2048                                         break;
2049                                 case PCH_DP_D:
2050                                         reg |= TRANS_DP_PORT_SEL_D;
2051                                         break;
2052                                 default:
2053                                         DRM_DEBUG_KMS("Wrong PCH DP port return. Guess port B\n");
2054                                         reg |= TRANS_DP_PORT_SEL_B;
2055                                         break;
2056                                 }
2057
2058                                 I915_WRITE(trans_dp_ctl, reg);
2059                                 POSTING_READ(trans_dp_ctl);
2060                         }
2061
2062                         /* enable PCH transcoder */
2063                         temp = I915_READ(transconf_reg);
2064                         /*
2065                          * make the BPC in transcoder be consistent with
2066                          * that in pipeconf reg.
2067                          */
2068                         temp &= ~PIPE_BPC_MASK;
2069                         temp |= pipe_bpc;
2070                         I915_WRITE(transconf_reg, temp | TRANS_ENABLE);
2071                         I915_READ(transconf_reg);
2072
2073                         if (wait_for(I915_READ(transconf_reg) & TRANS_STATE_ENABLE, 100, 1))
2074                                 DRM_ERROR("failed to enable transcoder\n");
2075                 }
2076
2077                 intel_crtc_load_lut(crtc);
2078
2079                 intel_update_fbc(crtc, &crtc->mode);
2080                 break;
2081
2082         case DRM_MODE_DPMS_OFF:
2083                 DRM_DEBUG_KMS("crtc %d/%d dpms off\n", pipe, plane);
2084
2085                 drm_vblank_off(dev, pipe);
2086                 /* Disable display plane */
2087                 temp = I915_READ(dspcntr_reg);
2088                 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
2089                         I915_WRITE(dspcntr_reg, temp & ~DISPLAY_PLANE_ENABLE);
2090                         /* Flush the plane changes */
2091                         I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
2092                         I915_READ(dspbase_reg);
2093                 }
2094
2095                 if (dev_priv->cfb_plane == plane &&
2096                     dev_priv->display.disable_fbc)
2097                         dev_priv->display.disable_fbc(dev);
2098
2099                 /* disable cpu pipe, disable after all planes disabled */
2100                 temp = I915_READ(pipeconf_reg);
2101                 if ((temp & PIPEACONF_ENABLE) != 0) {
2102                         I915_WRITE(pipeconf_reg, temp & ~PIPEACONF_ENABLE);
2103
2104                         /* wait for cpu pipe off, pipe state */
2105                         if (wait_for((I915_READ(pipeconf_reg) & I965_PIPECONF_ACTIVE) == 0, 50, 1))
2106                                 DRM_ERROR("failed to turn off cpu pipe\n");
2107                 } else
2108                         DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
2109
2110                 udelay(100);
2111
2112                 /* Disable PF */
2113                 I915_WRITE(pipe ? PFB_CTL_1 : PFA_CTL_1, 0);
2114                 I915_WRITE(pipe ? PFB_WIN_SZ : PFA_WIN_SZ, 0);
2115
2116                 /* disable CPU FDI tx and PCH FDI rx */
2117                 temp = I915_READ(fdi_tx_reg);
2118                 I915_WRITE(fdi_tx_reg, temp & ~FDI_TX_ENABLE);
2119                 I915_READ(fdi_tx_reg);
2120
2121                 temp = I915_READ(fdi_rx_reg);
2122                 /* BPC in FDI rx is consistent with that in pipeconf */
2123                 temp &= ~(0x07 << 16);
2124                 temp |= (pipe_bpc << 11);
2125                 I915_WRITE(fdi_rx_reg, temp & ~FDI_RX_ENABLE);
2126                 I915_READ(fdi_rx_reg);
2127
2128                 udelay(100);
2129
2130                 /* still set train pattern 1 */
2131                 temp = I915_READ(fdi_tx_reg);
2132                 temp &= ~FDI_LINK_TRAIN_NONE;
2133                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2134                 I915_WRITE(fdi_tx_reg, temp);
2135                 POSTING_READ(fdi_tx_reg);
2136
2137                 temp = I915_READ(fdi_rx_reg);
2138                 if (HAS_PCH_CPT(dev)) {
2139                         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2140                         temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2141                 } else {
2142                         temp &= ~FDI_LINK_TRAIN_NONE;
2143                         temp |= FDI_LINK_TRAIN_PATTERN_1;
2144                 }
2145                 I915_WRITE(fdi_rx_reg, temp);
2146                 POSTING_READ(fdi_rx_reg);
2147
2148                 udelay(100);
2149
2150                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
2151                         temp = I915_READ(PCH_LVDS);
2152                         I915_WRITE(PCH_LVDS, temp & ~LVDS_PORT_EN);
2153                         I915_READ(PCH_LVDS);
2154                         udelay(100);
2155                 }
2156
2157                 /* disable PCH transcoder */
2158                 temp = I915_READ(transconf_reg);
2159                 if ((temp & TRANS_ENABLE) != 0) {
2160                         I915_WRITE(transconf_reg, temp & ~TRANS_ENABLE);
2161
2162                         /* wait for PCH transcoder off, transcoder state */
2163                         if (wait_for((I915_READ(transconf_reg) & TRANS_STATE_ENABLE) == 0, 50, 1))
2164                                 DRM_ERROR("failed to disable transcoder\n");
2165                 }
2166
2167                 temp = I915_READ(transconf_reg);
2168                 /* BPC in transcoder is consistent with that in pipeconf */
2169                 temp &= ~PIPE_BPC_MASK;
2170                 temp |= pipe_bpc;
2171                 I915_WRITE(transconf_reg, temp);
2172                 I915_READ(transconf_reg);
2173                 udelay(100);
2174
2175                 if (HAS_PCH_CPT(dev)) {
2176                         /* disable TRANS_DP_CTL */
2177                         int trans_dp_ctl = (pipe == 0) ? TRANS_DP_CTL_A : TRANS_DP_CTL_B;
2178                         int reg;
2179
2180                         reg = I915_READ(trans_dp_ctl);
2181                         reg &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
2182                         I915_WRITE(trans_dp_ctl, reg);
2183                         POSTING_READ(trans_dp_ctl);
2184
2185                         /* disable DPLL_SEL */
2186                         temp = I915_READ(PCH_DPLL_SEL);
2187                         if (trans_dpll_sel == 0)
2188                                 temp &= ~(TRANSA_DPLL_ENABLE | TRANSA_DPLLB_SEL);
2189                         else
2190                                 temp &= ~(TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
2191                         I915_WRITE(PCH_DPLL_SEL, temp);
2192                         I915_READ(PCH_DPLL_SEL);
2193
2194                 }
2195
2196                 /* disable PCH DPLL */
2197                 temp = I915_READ(pch_dpll_reg);
2198                 I915_WRITE(pch_dpll_reg, temp & ~DPLL_VCO_ENABLE);
2199                 I915_READ(pch_dpll_reg);
2200
2201                 /* Switch from PCDclk to Rawclk */
2202                 temp = I915_READ(fdi_rx_reg);
2203                 temp &= ~FDI_SEL_PCDCLK;
2204                 I915_WRITE(fdi_rx_reg, temp);
2205                 I915_READ(fdi_rx_reg);
2206
2207                 /* Disable CPU FDI TX PLL */
2208                 temp = I915_READ(fdi_tx_reg);
2209                 I915_WRITE(fdi_tx_reg, temp & ~FDI_TX_PLL_ENABLE);
2210                 I915_READ(fdi_tx_reg);
2211                 udelay(100);
2212
2213                 temp = I915_READ(fdi_rx_reg);
2214                 temp &= ~FDI_RX_PLL_ENABLE;
2215                 I915_WRITE(fdi_rx_reg, temp);
2216                 I915_READ(fdi_rx_reg);
2217
2218                 /* Wait for the clocks to turn off. */
2219                 udelay(100);
2220                 break;
2221         }
2222 }
2223
2224 static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
2225 {
2226         struct intel_overlay *overlay;
2227         int ret;
2228
2229         if (!enable && intel_crtc->overlay) {
2230                 overlay = intel_crtc->overlay;
2231                 mutex_lock(&overlay->dev->struct_mutex);
2232                 for (;;) {
2233                         ret = intel_overlay_switch_off(overlay);
2234                         if (ret == 0)
2235                                 break;
2236
2237                         ret = intel_overlay_recover_from_interrupt(overlay, 0);
2238                         if (ret != 0) {
2239                                 /* overlay doesn't react anymore. Usually
2240                                  * results in a black screen and an unkillable
2241                                  * X server. */
2242                                 BUG();
2243                                 overlay->hw_wedged = HW_WEDGED;
2244                                 break;
2245                         }
2246                 }
2247                 mutex_unlock(&overlay->dev->struct_mutex);
2248         }
2249         /* Let userspace switch the overlay on again. In most cases userspace
2250          * has to recompute where to put it anyway. */
2251
2252         return;
2253 }
2254
2255 static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode)
2256 {
2257         struct drm_device *dev = crtc->dev;
2258         struct drm_i915_private *dev_priv = dev->dev_private;
2259         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2260         int pipe = intel_crtc->pipe;
2261         int plane = intel_crtc->plane;
2262         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
2263         int dspcntr_reg = (plane == 0) ? DSPACNTR : DSPBCNTR;
2264         int dspbase_reg = (plane == 0) ? DSPAADDR : DSPBADDR;
2265         int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
2266         u32 temp;
2267
2268         /* XXX: When our outputs are all unaware of DPMS modes other than off
2269          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
2270          */
2271         switch (mode) {
2272         case DRM_MODE_DPMS_ON:
2273         case DRM_MODE_DPMS_STANDBY:
2274         case DRM_MODE_DPMS_SUSPEND:
2275                 /* Enable the DPLL */
2276                 temp = I915_READ(dpll_reg);
2277                 if ((temp & DPLL_VCO_ENABLE) == 0) {
2278                         I915_WRITE(dpll_reg, temp);
2279                         I915_READ(dpll_reg);
2280                         /* Wait for the clocks to stabilize. */
2281                         udelay(150);
2282                         I915_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
2283                         I915_READ(dpll_reg);
2284                         /* Wait for the clocks to stabilize. */
2285                         udelay(150);
2286                         I915_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
2287                         I915_READ(dpll_reg);
2288                         /* Wait for the clocks to stabilize. */
2289                         udelay(150);
2290                 }
2291
2292                 /* Enable the pipe */
2293                 temp = I915_READ(pipeconf_reg);
2294                 if ((temp & PIPEACONF_ENABLE) == 0)
2295                         I915_WRITE(pipeconf_reg, temp | PIPEACONF_ENABLE);
2296
2297                 /* Enable the plane */
2298                 temp = I915_READ(dspcntr_reg);
2299                 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
2300                         I915_WRITE(dspcntr_reg, temp | DISPLAY_PLANE_ENABLE);
2301                         /* Flush the plane changes */
2302                         I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
2303                 }
2304
2305                 intel_crtc_load_lut(crtc);
2306
2307                 if ((IS_I965G(dev) || plane == 0))
2308                         intel_update_fbc(crtc, &crtc->mode);
2309
2310                 /* Give the overlay scaler a chance to enable if it's on this pipe */
2311                 intel_crtc_dpms_overlay(intel_crtc, true);
2312         break;
2313         case DRM_MODE_DPMS_OFF:
2314                 /* Give the overlay scaler a chance to disable if it's on this pipe */
2315                 intel_crtc_dpms_overlay(intel_crtc, false);
2316                 drm_vblank_off(dev, pipe);
2317
2318                 if (dev_priv->cfb_plane == plane &&
2319                     dev_priv->display.disable_fbc)
2320                         dev_priv->display.disable_fbc(dev);
2321
2322                 /* Disable display plane */
2323                 temp = I915_READ(dspcntr_reg);
2324                 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
2325                         I915_WRITE(dspcntr_reg, temp & ~DISPLAY_PLANE_ENABLE);
2326                         /* Flush the plane changes */
2327                         I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
2328                         I915_READ(dspbase_reg);
2329                 }
2330
2331                 /* Wait for vblank for the disable to take effect */
2332                 intel_wait_for_vblank_off(dev, pipe);
2333
2334                 /* Don't disable pipe A or pipe A PLLs if needed */
2335                 if (pipeconf_reg == PIPEACONF &&
2336                     (dev_priv->quirks & QUIRK_PIPEA_FORCE))
2337                         goto skip_pipe_off;
2338
2339                 /* Next, disable display pipes */
2340                 temp = I915_READ(pipeconf_reg);
2341                 if ((temp & PIPEACONF_ENABLE) != 0) {
2342                         I915_WRITE(pipeconf_reg, temp & ~PIPEACONF_ENABLE);
2343                         I915_READ(pipeconf_reg);
2344                 }
2345
2346                 /* Wait for vblank for the disable to take effect. */
2347                 intel_wait_for_vblank_off(dev, pipe);
2348
2349                 temp = I915_READ(dpll_reg);
2350                 if ((temp & DPLL_VCO_ENABLE) != 0) {
2351                         I915_WRITE(dpll_reg, temp & ~DPLL_VCO_ENABLE);
2352                         I915_READ(dpll_reg);
2353                 }
2354         skip_pipe_off:
2355                 /* Wait for the clocks to turn off. */
2356                 udelay(150);
2357                 break;
2358         }
2359 }
2360
2361 /**
2362  * Sets the power management mode of the pipe and plane.
2363  */
2364 static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
2365 {
2366         struct drm_device *dev = crtc->dev;
2367         struct drm_i915_private *dev_priv = dev->dev_private;
2368         struct drm_i915_master_private *master_priv;
2369         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2370         int pipe = intel_crtc->pipe;
2371         bool enabled;
2372
2373         intel_crtc->dpms_mode = mode;
2374         intel_crtc->cursor_on = mode == DRM_MODE_DPMS_ON;
2375
2376         /* When switching on the display, ensure that SR is disabled
2377          * with multiple pipes prior to enabling to new pipe.
2378          *
2379          * When switching off the display, make sure the cursor is
2380          * properly hidden prior to disabling the pipe.
2381          */
2382         if (mode == DRM_MODE_DPMS_ON)
2383                 intel_update_watermarks(dev);
2384         else
2385                 intel_crtc_update_cursor(crtc);
2386
2387         dev_priv->display.dpms(crtc, mode);
2388
2389         if (mode == DRM_MODE_DPMS_ON)
2390                 intel_crtc_update_cursor(crtc);
2391         else
2392                 intel_update_watermarks(dev);
2393
2394         if (!dev->primary->master)
2395                 return;
2396
2397         master_priv = dev->primary->master->driver_priv;
2398         if (!master_priv->sarea_priv)
2399                 return;
2400
2401         enabled = crtc->enabled && mode != DRM_MODE_DPMS_OFF;
2402
2403         switch (pipe) {
2404         case 0:
2405                 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
2406                 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
2407                 break;
2408         case 1:
2409                 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
2410                 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
2411                 break;
2412         default:
2413                 DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
2414                 break;
2415         }
2416 }
2417
2418 static void intel_crtc_prepare (struct drm_crtc *crtc)
2419 {
2420         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
2421         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
2422 }
2423
2424 static void intel_crtc_commit (struct drm_crtc *crtc)
2425 {
2426         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
2427         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
2428 }
2429
2430 void intel_encoder_prepare (struct drm_encoder *encoder)
2431 {
2432         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
2433         /* lvds has its own version of prepare see intel_lvds_prepare */
2434         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
2435 }
2436
2437 void intel_encoder_commit (struct drm_encoder *encoder)
2438 {
2439         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
2440         /* lvds has its own version of commit see intel_lvds_commit */
2441         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
2442 }
2443
2444 void intel_encoder_destroy(struct drm_encoder *encoder)
2445 {
2446         struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
2447
2448         if (intel_encoder->ddc_bus)
2449                 intel_i2c_destroy(intel_encoder->ddc_bus);
2450
2451         if (intel_encoder->i2c_bus)
2452                 intel_i2c_destroy(intel_encoder->i2c_bus);
2453
2454         drm_encoder_cleanup(encoder);
2455         kfree(intel_encoder);
2456 }
2457
2458 static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
2459                                   struct drm_display_mode *mode,
2460                                   struct drm_display_mode *adjusted_mode)
2461 {
2462         struct drm_device *dev = crtc->dev;
2463         if (HAS_PCH_SPLIT(dev)) {
2464                 /* FDI link clock is fixed at 2.7G */
2465                 if (mode->clock * 3 > IRONLAKE_FDI_FREQ * 4)
2466                         return false;
2467         }
2468         return true;
2469 }
2470
2471 static int i945_get_display_clock_speed(struct drm_device *dev)
2472 {
2473         return 400000;
2474 }
2475
2476 static int i915_get_display_clock_speed(struct drm_device *dev)
2477 {
2478         return 333000;
2479 }
2480
2481 static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
2482 {
2483         return 200000;
2484 }
2485
2486 static int i915gm_get_display_clock_speed(struct drm_device *dev)
2487 {
2488         u16 gcfgc = 0;
2489
2490         pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
2491
2492         if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
2493                 return 133000;
2494         else {
2495                 switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
2496                 case GC_DISPLAY_CLOCK_333_MHZ:
2497                         return 333000;
2498                 default:
2499                 case GC_DISPLAY_CLOCK_190_200_MHZ:
2500                         return 190000;
2501                 }
2502         }
2503 }
2504
2505 static int i865_get_display_clock_speed(struct drm_device *dev)
2506 {
2507         return 266000;
2508 }
2509
2510 static int i855_get_display_clock_speed(struct drm_device *dev)
2511 {
2512         u16 hpllcc = 0;
2513         /* Assume that the hardware is in the high speed state.  This
2514          * should be the default.
2515          */
2516         switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
2517         case GC_CLOCK_133_200:
2518         case GC_CLOCK_100_200:
2519                 return 200000;
2520         case GC_CLOCK_166_250:
2521                 return 250000;
2522         case GC_CLOCK_100_133:
2523                 return 133000;
2524         }
2525
2526         /* Shouldn't happen */
2527         return 0;
2528 }
2529
2530 static int i830_get_display_clock_speed(struct drm_device *dev)
2531 {
2532         return 133000;
2533 }
2534
2535 /**
2536  * Return the pipe currently connected to the panel fitter,
2537  * or -1 if the panel fitter is not present or not in use
2538  */
2539 int intel_panel_fitter_pipe (struct drm_device *dev)
2540 {
2541         struct drm_i915_private *dev_priv = dev->dev_private;
2542         u32  pfit_control;
2543
2544         /* i830 doesn't have a panel fitter */
2545         if (IS_I830(dev))
2546                 return -1;
2547
2548         pfit_control = I915_READ(PFIT_CONTROL);
2549
2550         /* See if the panel fitter is in use */
2551         if ((pfit_control & PFIT_ENABLE) == 0)
2552                 return -1;
2553
2554         /* 965 can place panel fitter on either pipe */
2555         if (IS_I965G(dev))
2556                 return (pfit_control >> 29) & 0x3;
2557
2558         /* older chips can only use pipe 1 */
2559         return 1;
2560 }
2561
2562 struct fdi_m_n {
2563         u32        tu;
2564         u32        gmch_m;
2565         u32        gmch_n;
2566         u32        link_m;
2567         u32        link_n;
2568 };
2569
2570 static void
2571 fdi_reduce_ratio(u32 *num, u32 *den)
2572 {
2573         while (*num > 0xffffff || *den > 0xffffff) {
2574                 *num >>= 1;
2575                 *den >>= 1;
2576         }
2577 }
2578
2579 #define DATA_N 0x800000
2580 #define LINK_N 0x80000
2581
2582 static void
2583 ironlake_compute_m_n(int bits_per_pixel, int nlanes, int pixel_clock,
2584                      int link_clock, struct fdi_m_n *m_n)
2585 {
2586         u64 temp;
2587
2588         m_n->tu = 64; /* default size */
2589
2590         temp = (u64) DATA_N * pixel_clock;
2591         temp = div_u64(temp, link_clock);
2592         m_n->gmch_m = div_u64(temp * bits_per_pixel, nlanes);
2593         m_n->gmch_m >>= 3; /* convert to bytes_per_pixel */
2594         m_n->gmch_n = DATA_N;
2595         fdi_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
2596
2597         temp = (u64) LINK_N * pixel_clock;
2598         m_n->link_m = div_u64(temp, link_clock);
2599         m_n->link_n = LINK_N;
2600         fdi_reduce_ratio(&m_n->link_m, &m_n->link_n);
2601 }
2602
2603
2604 struct intel_watermark_params {
2605         unsigned long fifo_size;
2606         unsigned long max_wm;
2607         unsigned long default_wm;
2608         unsigned long guard_size;
2609         unsigned long cacheline_size;
2610 };
2611
2612 /* Pineview has different values for various configs */
2613 static struct intel_watermark_params pineview_display_wm = {
2614         PINEVIEW_DISPLAY_FIFO,
2615         PINEVIEW_MAX_WM,
2616         PINEVIEW_DFT_WM,
2617         PINEVIEW_GUARD_WM,
2618         PINEVIEW_FIFO_LINE_SIZE
2619 };
2620 static struct intel_watermark_params pineview_display_hplloff_wm = {
2621         PINEVIEW_DISPLAY_FIFO,
2622         PINEVIEW_MAX_WM,
2623         PINEVIEW_DFT_HPLLOFF_WM,
2624         PINEVIEW_GUARD_WM,
2625         PINEVIEW_FIFO_LINE_SIZE
2626 };
2627 static struct intel_watermark_params pineview_cursor_wm = {
2628         PINEVIEW_CURSOR_FIFO,
2629         PINEVIEW_CURSOR_MAX_WM,
2630         PINEVIEW_CURSOR_DFT_WM,
2631         PINEVIEW_CURSOR_GUARD_WM,
2632         PINEVIEW_FIFO_LINE_SIZE,
2633 };
2634 static struct intel_watermark_params pineview_cursor_hplloff_wm = {
2635         PINEVIEW_CURSOR_FIFO,
2636         PINEVIEW_CURSOR_MAX_WM,
2637         PINEVIEW_CURSOR_DFT_WM,
2638         PINEVIEW_CURSOR_GUARD_WM,
2639         PINEVIEW_FIFO_LINE_SIZE
2640 };
2641 static struct intel_watermark_params g4x_wm_info = {
2642         G4X_FIFO_SIZE,
2643         G4X_MAX_WM,
2644         G4X_MAX_WM,
2645         2,
2646         G4X_FIFO_LINE_SIZE,
2647 };
2648 static struct intel_watermark_params g4x_cursor_wm_info = {
2649         I965_CURSOR_FIFO,
2650         I965_CURSOR_MAX_WM,
2651         I965_CURSOR_DFT_WM,
2652         2,
2653         G4X_FIFO_LINE_SIZE,
2654 };
2655 static struct intel_watermark_params i965_cursor_wm_info = {
2656         I965_CURSOR_FIFO,
2657         I965_CURSOR_MAX_WM,
2658         I965_CURSOR_DFT_WM,
2659         2,
2660         I915_FIFO_LINE_SIZE,
2661 };
2662 static struct intel_watermark_params i945_wm_info = {
2663         I945_FIFO_SIZE,
2664         I915_MAX_WM,
2665         1,
2666         2,
2667         I915_FIFO_LINE_SIZE
2668 };
2669 static struct intel_watermark_params i915_wm_info = {
2670         I915_FIFO_SIZE,
2671         I915_MAX_WM,
2672         1,
2673         2,
2674         I915_FIFO_LINE_SIZE
2675 };
2676 static struct intel_watermark_params i855_wm_info = {
2677         I855GM_FIFO_SIZE,
2678         I915_MAX_WM,
2679         1,
2680         2,
2681         I830_FIFO_LINE_SIZE
2682 };
2683 static struct intel_watermark_params i830_wm_info = {
2684         I830_FIFO_SIZE,
2685         I915_MAX_WM,
2686         1,
2687         2,
2688         I830_FIFO_LINE_SIZE
2689 };
2690
2691 static struct intel_watermark_params ironlake_display_wm_info = {
2692         ILK_DISPLAY_FIFO,
2693         ILK_DISPLAY_MAXWM,
2694         ILK_DISPLAY_DFTWM,
2695         2,
2696         ILK_FIFO_LINE_SIZE
2697 };
2698
2699 static struct intel_watermark_params ironlake_cursor_wm_info = {
2700         ILK_CURSOR_FIFO,
2701         ILK_CURSOR_MAXWM,
2702         ILK_CURSOR_DFTWM,
2703         2,
2704         ILK_FIFO_LINE_SIZE
2705 };
2706
2707 static struct intel_watermark_params ironlake_display_srwm_info = {
2708         ILK_DISPLAY_SR_FIFO,
2709         ILK_DISPLAY_MAX_SRWM,
2710         ILK_DISPLAY_DFT_SRWM,
2711         2,
2712         ILK_FIFO_LINE_SIZE
2713 };
2714
2715 static struct intel_watermark_params ironlake_cursor_srwm_info = {
2716         ILK_CURSOR_SR_FIFO,
2717         ILK_CURSOR_MAX_SRWM,
2718         ILK_CURSOR_DFT_SRWM,
2719         2,
2720         ILK_FIFO_LINE_SIZE
2721 };
2722
2723 /**
2724  * intel_calculate_wm - calculate watermark level
2725  * @clock_in_khz: pixel clock
2726  * @wm: chip FIFO params
2727  * @pixel_size: display pixel size
2728  * @latency_ns: memory latency for the platform
2729  *
2730  * Calculate the watermark level (the level at which the display plane will
2731  * start fetching from memory again).  Each chip has a different display
2732  * FIFO size and allocation, so the caller needs to figure that out and pass
2733  * in the correct intel_watermark_params structure.
2734  *
2735  * As the pixel clock runs, the FIFO will be drained at a rate that depends
2736  * on the pixel size.  When it reaches the watermark level, it'll start
2737  * fetching FIFO line sized based chunks from memory until the FIFO fills
2738  * past the watermark point.  If the FIFO drains completely, a FIFO underrun
2739  * will occur, and a display engine hang could result.
2740  */
2741 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
2742                                         struct intel_watermark_params *wm,
2743                                         int pixel_size,
2744                                         unsigned long latency_ns)
2745 {
2746         long entries_required, wm_size;
2747
2748         /*
2749          * Note: we need to make sure we don't overflow for various clock &
2750          * latency values.
2751          * clocks go from a few thousand to several hundred thousand.
2752          * latency is usually a few thousand
2753          */
2754         entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
2755                 1000;
2756         entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
2757
2758         DRM_DEBUG_KMS("FIFO entries required for mode: %d\n", entries_required);
2759
2760         wm_size = wm->fifo_size - (entries_required + wm->guard_size);
2761
2762         DRM_DEBUG_KMS("FIFO watermark level: %d\n", wm_size);
2763
2764         /* Don't promote wm_size to unsigned... */
2765         if (wm_size > (long)wm->max_wm)
2766                 wm_size = wm->max_wm;
2767         if (wm_size <= 0) {
2768                 wm_size = wm->default_wm;
2769                 DRM_ERROR("Insufficient FIFO for plane, expect flickering:"
2770                           " entries required = %ld, available = %lu.\n",
2771                           entries_required + wm->guard_size,
2772                           wm->fifo_size);
2773         }
2774
2775         return wm_size;
2776 }
2777
2778 struct cxsr_latency {
2779         int is_desktop;
2780         int is_ddr3;
2781         unsigned long fsb_freq;
2782         unsigned long mem_freq;
2783         unsigned long display_sr;
2784         unsigned long display_hpll_disable;
2785         unsigned long cursor_sr;
2786         unsigned long cursor_hpll_disable;
2787 };
2788
2789 static const struct cxsr_latency cxsr_latency_table[] = {
2790         {1, 0, 800, 400, 3382, 33382, 3983, 33983},    /* DDR2-400 SC */
2791         {1, 0, 800, 667, 3354, 33354, 3807, 33807},    /* DDR2-667 SC */
2792         {1, 0, 800, 800, 3347, 33347, 3763, 33763},    /* DDR2-800 SC */
2793         {1, 1, 800, 667, 6420, 36420, 6873, 36873},    /* DDR3-667 SC */
2794         {1, 1, 800, 800, 5902, 35902, 6318, 36318},    /* DDR3-800 SC */
2795
2796         {1, 0, 667, 400, 3400, 33400, 4021, 34021},    /* DDR2-400 SC */
2797         {1, 0, 667, 667, 3372, 33372, 3845, 33845},    /* DDR2-667 SC */
2798         {1, 0, 667, 800, 3386, 33386, 3822, 33822},    /* DDR2-800 SC */
2799         {1, 1, 667, 667, 6438, 36438, 6911, 36911},    /* DDR3-667 SC */
2800         {1, 1, 667, 800, 5941, 35941, 6377, 36377},    /* DDR3-800 SC */
2801
2802         {1, 0, 400, 400, 3472, 33472, 4173, 34173},    /* DDR2-400 SC */
2803         {1, 0, 400, 667, 3443, 33443, 3996, 33996},    /* DDR2-667 SC */
2804         {1, 0, 400, 800, 3430, 33430, 3946, 33946},    /* DDR2-800 SC */
2805         {1, 1, 400, 667, 6509, 36509, 7062, 37062},    /* DDR3-667 SC */
2806         {1, 1, 400, 800, 5985, 35985, 6501, 36501},    /* DDR3-800 SC */
2807
2808         {0, 0, 800, 400, 3438, 33438, 4065, 34065},    /* DDR2-400 SC */
2809         {0, 0, 800, 667, 3410, 33410, 3889, 33889},    /* DDR2-667 SC */
2810         {0, 0, 800, 800, 3403, 33403, 3845, 33845},    /* DDR2-800 SC */
2811         {0, 1, 800, 667, 6476, 36476, 6955, 36955},    /* DDR3-667 SC */
2812         {0, 1, 800, 800, 5958, 35958, 6400, 36400},    /* DDR3-800 SC */
2813
2814         {0, 0, 667, 400, 3456, 33456, 4103, 34106},    /* DDR2-400 SC */
2815         {0, 0, 667, 667, 3428, 33428, 3927, 33927},    /* DDR2-667 SC */
2816         {0, 0, 667, 800, 3443, 33443, 3905, 33905},    /* DDR2-800 SC */
2817         {0, 1, 667, 667, 6494, 36494, 6993, 36993},    /* DDR3-667 SC */
2818         {0, 1, 667, 800, 5998, 35998, 6460, 36460},    /* DDR3-800 SC */
2819
2820         {0, 0, 400, 400, 3528, 33528, 4255, 34255},    /* DDR2-400 SC */
2821         {0, 0, 400, 667, 3500, 33500, 4079, 34079},    /* DDR2-667 SC */
2822         {0, 0, 400, 800, 3487, 33487, 4029, 34029},    /* DDR2-800 SC */
2823         {0, 1, 400, 667, 6566, 36566, 7145, 37145},    /* DDR3-667 SC */
2824         {0, 1, 400, 800, 6042, 36042, 6584, 36584},    /* DDR3-800 SC */
2825 };
2826
2827 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
2828                                                          int is_ddr3,
2829                                                          int fsb,
2830                                                          int mem)
2831 {
2832         const struct cxsr_latency *latency;
2833         int i;
2834
2835         if (fsb == 0 || mem == 0)
2836                 return NULL;
2837
2838         for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
2839                 latency = &cxsr_latency_table[i];
2840                 if (is_desktop == latency->is_desktop &&
2841                     is_ddr3 == latency->is_ddr3 &&
2842                     fsb == latency->fsb_freq && mem == latency->mem_freq)
2843                         return latency;
2844         }
2845
2846         DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
2847
2848         return NULL;
2849 }
2850
2851 static void pineview_disable_cxsr(struct drm_device *dev)
2852 {
2853         struct drm_i915_private *dev_priv = dev->dev_private;
2854
2855         /* deactivate cxsr */
2856         I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
2857 }
2858
2859 /*
2860  * Latency for FIFO fetches is dependent on several factors:
2861  *   - memory configuration (speed, channels)
2862  *   - chipset
2863  *   - current MCH state
2864  * It can be fairly high in some situations, so here we assume a fairly
2865  * pessimal value.  It's a tradeoff between extra memory fetches (if we
2866  * set this value too high, the FIFO will fetch frequently to stay full)
2867  * and power consumption (set it too low to save power and we might see
2868  * FIFO underruns and display "flicker").
2869  *
2870  * A value of 5us seems to be a good balance; safe for very low end
2871  * platforms but not overly aggressive on lower latency configs.
2872  */
2873 static const int latency_ns = 5000;
2874
2875 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
2876 {
2877         struct drm_i915_private *dev_priv = dev->dev_private;
2878         uint32_t dsparb = I915_READ(DSPARB);
2879         int size;
2880
2881         size = dsparb & 0x7f;
2882         if (plane)
2883                 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
2884
2885         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
2886                         plane ? "B" : "A", size);
2887
2888         return size;
2889 }
2890
2891 static int i85x_get_fifo_size(struct drm_device *dev, int plane)
2892 {
2893         struct drm_i915_private *dev_priv = dev->dev_private;
2894         uint32_t dsparb = I915_READ(DSPARB);
2895         int size;
2896
2897         size = dsparb & 0x1ff;
2898         if (plane)
2899                 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
2900         size >>= 1; /* Convert to cachelines */
2901
2902         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
2903                         plane ? "B" : "A", size);
2904
2905         return size;
2906 }
2907
2908 static int i845_get_fifo_size(struct drm_device *dev, int plane)
2909 {
2910         struct drm_i915_private *dev_priv = dev->dev_private;
2911         uint32_t dsparb = I915_READ(DSPARB);
2912         int size;
2913
2914         size = dsparb & 0x7f;
2915         size >>= 2; /* Convert to cachelines */
2916
2917         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
2918                         plane ? "B" : "A",
2919                   size);
2920
2921         return size;
2922 }
2923
2924 static int i830_get_fifo_size(struct drm_device *dev, int plane)
2925 {
2926         struct drm_i915_private *dev_priv = dev->dev_private;
2927         uint32_t dsparb = I915_READ(DSPARB);
2928         int size;
2929
2930         size = dsparb & 0x7f;
2931         size >>= 1; /* Convert to cachelines */
2932
2933         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
2934                         plane ? "B" : "A", size);
2935
2936         return size;
2937 }
2938
2939 static void pineview_update_wm(struct drm_device *dev,  int planea_clock,
2940                           int planeb_clock, int sr_hdisplay, int unused,
2941                           int pixel_size)
2942 {
2943         struct drm_i915_private *dev_priv = dev->dev_private;
2944         const struct cxsr_latency *latency;
2945         u32 reg;
2946         unsigned long wm;
2947         int sr_clock;
2948
2949         latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
2950                                          dev_priv->fsb_freq, dev_priv->mem_freq);
2951         if (!latency) {
2952                 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
2953                 pineview_disable_cxsr(dev);
2954                 return;
2955         }
2956
2957         if (!planea_clock || !planeb_clock) {
2958                 sr_clock = planea_clock ? planea_clock : planeb_clock;
2959
2960                 /* Display SR */
2961                 wm = intel_calculate_wm(sr_clock, &pineview_display_wm,
2962                                         pixel_size, latency->display_sr);
2963                 reg = I915_READ(DSPFW1);
2964                 reg &= ~DSPFW_SR_MASK;
2965                 reg |= wm << DSPFW_SR_SHIFT;
2966                 I915_WRITE(DSPFW1, reg);
2967                 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
2968
2969                 /* cursor SR */
2970                 wm = intel_calculate_wm(sr_clock, &pineview_cursor_wm,
2971                                         pixel_size, latency->cursor_sr);
2972                 reg = I915_READ(DSPFW3);
2973                 reg &= ~DSPFW_CURSOR_SR_MASK;
2974                 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
2975                 I915_WRITE(DSPFW3, reg);
2976
2977                 /* Display HPLL off SR */
2978                 wm = intel_calculate_wm(sr_clock, &pineview_display_hplloff_wm,
2979                                         pixel_size, latency->display_hpll_disable);
2980                 reg = I915_READ(DSPFW3);
2981                 reg &= ~DSPFW_HPLL_SR_MASK;
2982                 reg |= wm & DSPFW_HPLL_SR_MASK;
2983                 I915_WRITE(DSPFW3, reg);
2984
2985                 /* cursor HPLL off SR */
2986                 wm = intel_calculate_wm(sr_clock, &pineview_cursor_hplloff_wm,
2987                                         pixel_size, latency->cursor_hpll_disable);
2988                 reg = I915_READ(DSPFW3);
2989                 reg &= ~DSPFW_HPLL_CURSOR_MASK;
2990                 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
2991                 I915_WRITE(DSPFW3, reg);
2992                 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
2993
2994                 /* activate cxsr */
2995                 I915_WRITE(DSPFW3,
2996                            I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
2997                 DRM_DEBUG_KMS("Self-refresh is enabled\n");
2998         } else {
2999                 pineview_disable_cxsr(dev);
3000                 DRM_DEBUG_KMS("Self-refresh is disabled\n");
3001         }
3002 }
3003
3004 static void g4x_update_wm(struct drm_device *dev,  int planea_clock,
3005                           int planeb_clock, int sr_hdisplay, int sr_htotal,
3006                           int pixel_size)
3007 {
3008         struct drm_i915_private *dev_priv = dev->dev_private;
3009         int total_size, cacheline_size;
3010         int planea_wm, planeb_wm, cursora_wm, cursorb_wm, cursor_sr;
3011         struct intel_watermark_params planea_params, planeb_params;
3012         unsigned long line_time_us;
3013         int sr_clock, sr_entries = 0, entries_required;
3014
3015         /* Create copies of the base settings for each pipe */
3016         planea_params = planeb_params = g4x_wm_info;
3017
3018         /* Grab a couple of global values before we overwrite them */
3019         total_size = planea_params.fifo_size;
3020         cacheline_size = planea_params.cacheline_size;
3021
3022         /*
3023          * Note: we need to make sure we don't overflow for various clock &
3024          * latency values.
3025          * clocks go from a few thousand to several hundred thousand.
3026          * latency is usually a few thousand
3027          */
3028         entries_required = ((planea_clock / 1000) * pixel_size * latency_ns) /
3029                 1000;
3030         entries_required = DIV_ROUND_UP(entries_required, G4X_FIFO_LINE_SIZE);
3031         planea_wm = entries_required + planea_params.guard_size;
3032
3033         entries_required = ((planeb_clock / 1000) * pixel_size * latency_ns) /
3034                 1000;
3035         entries_required = DIV_ROUND_UP(entries_required, G4X_FIFO_LINE_SIZE);
3036         planeb_wm = entries_required + planeb_params.guard_size;
3037
3038         cursora_wm = cursorb_wm = 16;
3039         cursor_sr = 32;
3040
3041         DRM_DEBUG("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
3042
3043         /* Calc sr entries for one plane configs */
3044         if (sr_hdisplay && (!planea_clock || !planeb_clock)) {
3045                 /* self-refresh has much higher latency */
3046                 static const int sr_latency_ns = 12000;
3047
3048                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3049                 line_time_us = ((sr_htotal * 1000) / sr_clock);
3050
3051                 /* Use ns/us then divide to preserve precision */
3052                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3053                               pixel_size * sr_hdisplay;
3054                 sr_entries = DIV_ROUND_UP(sr_entries, cacheline_size);
3055
3056                 entries_required = (((sr_latency_ns / line_time_us) +
3057                                      1000) / 1000) * pixel_size * 64;
3058                 entries_required = DIV_ROUND_UP(entries_required,
3059                                            g4x_cursor_wm_info.cacheline_size);
3060                 cursor_sr = entries_required + g4x_cursor_wm_info.guard_size;
3061
3062                 if (cursor_sr > g4x_cursor_wm_info.max_wm)
3063                         cursor_sr = g4x_cursor_wm_info.max_wm;
3064                 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
3065                               "cursor %d\n", sr_entries, cursor_sr);
3066
3067                 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
3068         } else {
3069                 /* Turn off self refresh if both pipes are enabled */
3070                 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
3071                                         & ~FW_BLC_SELF_EN);
3072         }
3073
3074         DRM_DEBUG("Setting FIFO watermarks - A: %d, B: %d, SR %d\n",
3075                   planea_wm, planeb_wm, sr_entries);
3076
3077         planea_wm &= 0x3f;
3078         planeb_wm &= 0x3f;
3079
3080         I915_WRITE(DSPFW1, (sr_entries << DSPFW_SR_SHIFT) |
3081                    (cursorb_wm << DSPFW_CURSORB_SHIFT) |
3082                    (planeb_wm << DSPFW_PLANEB_SHIFT) | planea_wm);
3083         I915_WRITE(DSPFW2, (I915_READ(DSPFW2) & DSPFW_CURSORA_MASK) |
3084                    (cursora_wm << DSPFW_CURSORA_SHIFT));
3085         /* HPLL off in SR has some issues on G4x... disable it */
3086         I915_WRITE(DSPFW3, (I915_READ(DSPFW3) & ~DSPFW_HPLL_SR_EN) |
3087                    (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
3088 }
3089
3090 static void i965_update_wm(struct drm_device *dev, int planea_clock,
3091                            int planeb_clock, int sr_hdisplay, int sr_htotal,
3092                            int pixel_size)
3093 {
3094         struct drm_i915_private *dev_priv = dev->dev_private;
3095         unsigned long line_time_us;
3096         int sr_clock, sr_entries, srwm = 1;
3097         int cursor_sr = 16;
3098
3099         /* Calc sr entries for one plane configs */
3100         if (sr_hdisplay && (!planea_clock || !planeb_clock)) {
3101                 /* self-refresh has much higher latency */
3102                 static const int sr_latency_ns = 12000;
3103
3104                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3105                 line_time_us = ((sr_htotal * 1000) / sr_clock);
3106
3107                 /* Use ns/us then divide to preserve precision */
3108                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3109                               pixel_size * sr_hdisplay;
3110                 sr_entries = DIV_ROUND_UP(sr_entries, I915_FIFO_LINE_SIZE);
3111                 DRM_DEBUG("self-refresh entries: %d\n", sr_entries);
3112                 srwm = I965_FIFO_SIZE - sr_entries;
3113                 if (srwm < 0)
3114                         srwm = 1;
3115                 srwm &= 0x1ff;
3116
3117                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3118                              pixel_size * 64;
3119                 sr_entries = DIV_ROUND_UP(sr_entries,
3120                                           i965_cursor_wm_info.cacheline_size);
3121                 cursor_sr = i965_cursor_wm_info.fifo_size -
3122                             (sr_entries + i965_cursor_wm_info.guard_size);
3123
3124                 if (cursor_sr > i965_cursor_wm_info.max_wm)
3125                         cursor_sr = i965_cursor_wm_info.max_wm;
3126
3127                 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
3128                               "cursor %d\n", srwm, cursor_sr);
3129
3130                 if (IS_I965GM(dev))
3131                         I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
3132         } else {
3133                 /* Turn off self refresh if both pipes are enabled */
3134                 if (IS_I965GM(dev))
3135                         I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
3136                                    & ~FW_BLC_SELF_EN);
3137         }
3138
3139         DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
3140                       srwm);
3141
3142         /* 965 has limitations... */
3143         I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) | (8 << 16) | (8 << 8) |
3144                    (8 << 0));
3145         I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
3146         /* update cursor SR watermark */
3147         I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
3148 }
3149
3150 static void i9xx_update_wm(struct drm_device *dev, int planea_clock,
3151                            int planeb_clock, int sr_hdisplay, int sr_htotal,
3152                            int pixel_size)
3153 {
3154         struct drm_i915_private *dev_priv = dev->dev_private;
3155         uint32_t fwater_lo;
3156         uint32_t fwater_hi;
3157         int total_size, cacheline_size, cwm, srwm = 1;
3158         int planea_wm, planeb_wm;
3159         struct intel_watermark_params planea_params, planeb_params;
3160         unsigned long line_time_us;
3161         int sr_clock, sr_entries = 0;
3162
3163         /* Create copies of the base settings for each pipe */
3164         if (IS_I965GM(dev) || IS_I945GM(dev))
3165                 planea_params = planeb_params = i945_wm_info;
3166         else if (IS_I9XX(dev))
3167                 planea_params = planeb_params = i915_wm_info;
3168         else
3169                 planea_params = planeb_params = i855_wm_info;
3170
3171         /* Grab a couple of global values before we overwrite them */
3172         total_size = planea_params.fifo_size;
3173         cacheline_size = planea_params.cacheline_size;
3174
3175         /* Update per-plane FIFO sizes */
3176         planea_params.fifo_size = dev_priv->display.get_fifo_size(dev, 0);
3177         planeb_params.fifo_size = dev_priv->display.get_fifo_size(dev, 1);
3178
3179         planea_wm = intel_calculate_wm(planea_clock, &planea_params,
3180                                        pixel_size, latency_ns);
3181         planeb_wm = intel_calculate_wm(planeb_clock, &planeb_params,
3182                                        pixel_size, latency_ns);
3183         DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
3184
3185         /*
3186          * Overlay gets an aggressive default since video jitter is bad.
3187          */
3188         cwm = 2;
3189
3190         /* Calc sr entries for one plane configs */
3191         if (HAS_FW_BLC(dev) && sr_hdisplay &&
3192             (!planea_clock || !planeb_clock)) {
3193                 /* self-refresh has much higher latency */
3194                 static const int sr_latency_ns = 6000;
3195
3196                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3197                 line_time_us = ((sr_htotal * 1000) / sr_clock);
3198
3199                 /* Use ns/us then divide to preserve precision */
3200                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3201                               pixel_size * sr_hdisplay;
3202                 sr_entries = DIV_ROUND_UP(sr_entries, cacheline_size);
3203                 DRM_DEBUG_KMS("self-refresh entries: %d\n", sr_entries);
3204                 srwm = total_size - sr_entries;
3205                 if (srwm < 0)
3206                         srwm = 1;
3207
3208                 if (IS_I945G(dev) || IS_I945GM(dev))
3209                         I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
3210                 else if (IS_I915GM(dev)) {
3211                         /* 915M has a smaller SRWM field */
3212                         I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
3213                         I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN);
3214                 }
3215         } else {
3216                 /* Turn off self refresh if both pipes are enabled */
3217                 if (IS_I945G(dev) || IS_I945GM(dev)) {
3218                         I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
3219                                    & ~FW_BLC_SELF_EN);
3220                 } else if (IS_I915GM(dev)) {
3221                         I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN);
3222                 }
3223         }
3224
3225         DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
3226                   planea_wm, planeb_wm, cwm, srwm);
3227
3228         fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
3229         fwater_hi = (cwm & 0x1f);
3230
3231         /* Set request length to 8 cachelines per fetch */
3232         fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
3233         fwater_hi = fwater_hi | (1 << 8);
3234
3235         I915_WRITE(FW_BLC, fwater_lo);
3236         I915_WRITE(FW_BLC2, fwater_hi);
3237 }
3238
3239 static void i830_update_wm(struct drm_device *dev, int planea_clock, int unused,
3240                            int unused2, int unused3, int pixel_size)
3241 {
3242         struct drm_i915_private *dev_priv = dev->dev_private;
3243         uint32_t fwater_lo = I915_READ(FW_BLC) & ~0xfff;
3244         int planea_wm;
3245
3246         i830_wm_info.fifo_size = dev_priv->display.get_fifo_size(dev, 0);
3247
3248         planea_wm = intel_calculate_wm(planea_clock, &i830_wm_info,
3249                                        pixel_size, latency_ns);
3250         fwater_lo |= (3<<8) | planea_wm;
3251
3252         DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
3253
3254         I915_WRITE(FW_BLC, fwater_lo);
3255 }
3256
3257 #define ILK_LP0_PLANE_LATENCY           700
3258 #define ILK_LP0_CURSOR_LATENCY          1300
3259
3260 static void ironlake_update_wm(struct drm_device *dev,  int planea_clock,
3261                        int planeb_clock, int sr_hdisplay, int sr_htotal,
3262                        int pixel_size)
3263 {
3264         struct drm_i915_private *dev_priv = dev->dev_private;
3265         int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
3266         int sr_wm, cursor_wm;
3267         unsigned long line_time_us;
3268         int sr_clock, entries_required;
3269         u32 reg_value;
3270         int line_count;
3271         int planea_htotal = 0, planeb_htotal = 0;
3272         struct drm_crtc *crtc;
3273
3274         /* Need htotal for all active display plane */
3275         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
3276                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3277                 if (intel_crtc->dpms_mode == DRM_MODE_DPMS_ON) {
3278                         if (intel_crtc->plane == 0)
3279                                 planea_htotal = crtc->mode.htotal;
3280                         else
3281                                 planeb_htotal = crtc->mode.htotal;
3282                 }
3283         }
3284
3285         /* Calculate and update the watermark for plane A */
3286         if (planea_clock) {
3287                 entries_required = ((planea_clock / 1000) * pixel_size *
3288                                      ILK_LP0_PLANE_LATENCY) / 1000;
3289                 entries_required = DIV_ROUND_UP(entries_required,
3290                                                 ironlake_display_wm_info.cacheline_size);
3291                 planea_wm = entries_required +
3292                             ironlake_display_wm_info.guard_size;
3293
3294                 if (planea_wm > (int)ironlake_display_wm_info.max_wm)
3295                         planea_wm = ironlake_display_wm_info.max_wm;
3296
3297                 /* Use the large buffer method to calculate cursor watermark */
3298                 line_time_us = (planea_htotal * 1000) / planea_clock;
3299
3300                 /* Use ns/us then divide to preserve precision */
3301                 line_count = (ILK_LP0_CURSOR_LATENCY / line_time_us + 1000) / 1000;
3302
3303                 /* calculate the cursor watermark for cursor A */
3304                 entries_required = line_count * 64 * pixel_size;
3305                 entries_required = DIV_ROUND_UP(entries_required,
3306                                                 ironlake_cursor_wm_info.cacheline_size);
3307                 cursora_wm = entries_required + ironlake_cursor_wm_info.guard_size;
3308                 if (cursora_wm > ironlake_cursor_wm_info.max_wm)
3309                         cursora_wm = ironlake_cursor_wm_info.max_wm;
3310
3311                 reg_value = I915_READ(WM0_PIPEA_ILK);
3312                 reg_value &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
3313                 reg_value |= (planea_wm << WM0_PIPE_PLANE_SHIFT) |
3314                              (cursora_wm & WM0_PIPE_CURSOR_MASK);
3315                 I915_WRITE(WM0_PIPEA_ILK, reg_value);
3316                 DRM_DEBUG_KMS("FIFO watermarks For pipe A - plane %d, "
3317                                 "cursor: %d\n", planea_wm, cursora_wm);
3318         }
3319         /* Calculate and update the watermark for plane B */
3320         if (planeb_clock) {
3321                 entries_required = ((planeb_clock / 1000) * pixel_size *
3322                                      ILK_LP0_PLANE_LATENCY) / 1000;
3323                 entries_required = DIV_ROUND_UP(entries_required,
3324                                                 ironlake_display_wm_info.cacheline_size);
3325                 planeb_wm = entries_required +
3326                             ironlake_display_wm_info.guard_size;
3327
3328                 if (planeb_wm > (int)ironlake_display_wm_info.max_wm)
3329                         planeb_wm = ironlake_display_wm_info.max_wm;
3330
3331                 /* Use the large buffer method to calculate cursor watermark */
3332                 line_time_us = (planeb_htotal * 1000) / planeb_clock;
3333
3334                 /* Use ns/us then divide to preserve precision */
3335                 line_count = (ILK_LP0_CURSOR_LATENCY / line_time_us + 1000) / 1000;
3336
3337                 /* calculate the cursor watermark for cursor B */
3338                 entries_required = line_count * 64 * pixel_size;
3339                 entries_required = DIV_ROUND_UP(entries_required,
3340                                                 ironlake_cursor_wm_info.cacheline_size);
3341                 cursorb_wm = entries_required + ironlake_cursor_wm_info.guard_size;
3342                 if (cursorb_wm > ironlake_cursor_wm_info.max_wm)
3343                         cursorb_wm = ironlake_cursor_wm_info.max_wm;
3344
3345                 reg_value = I915_READ(WM0_PIPEB_ILK);
3346                 reg_value &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
3347                 reg_value |= (planeb_wm << WM0_PIPE_PLANE_SHIFT) |
3348                              (cursorb_wm & WM0_PIPE_CURSOR_MASK);
3349                 I915_WRITE(WM0_PIPEB_ILK, reg_value);
3350                 DRM_DEBUG_KMS("FIFO watermarks For pipe B - plane %d, "
3351                                 "cursor: %d\n", planeb_wm, cursorb_wm);
3352         }
3353
3354         /*
3355          * Calculate and update the self-refresh watermark only when one
3356          * display plane is used.
3357          */
3358         if (!planea_clock || !planeb_clock) {
3359
3360                 /* Read the self-refresh latency. The unit is 0.5us */
3361                 int ilk_sr_latency = I915_READ(MLTR_ILK) & ILK_SRLT_MASK;
3362
3363                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3364                 line_time_us = ((sr_htotal * 1000) / sr_clock);
3365
3366                 /* Use ns/us then divide to preserve precision */
3367                 line_count = ((ilk_sr_latency * 500) / line_time_us + 1000)
3368                                / 1000;
3369
3370                 /* calculate the self-refresh watermark for display plane */
3371                 entries_required = line_count * sr_hdisplay * pixel_size;
3372                 entries_required = DIV_ROUND_UP(entries_required,
3373                                                 ironlake_display_srwm_info.cacheline_size);
3374                 sr_wm = entries_required +
3375                         ironlake_display_srwm_info.guard_size;
3376
3377                 /* calculate the self-refresh watermark for display cursor */
3378                 entries_required = line_count * pixel_size * 64;
3379                 entries_required = DIV_ROUND_UP(entries_required,
3380                                                 ironlake_cursor_srwm_info.cacheline_size);
3381                 cursor_wm = entries_required +
3382                             ironlake_cursor_srwm_info.guard_size;
3383
3384                 /* configure watermark and enable self-refresh */
3385                 reg_value = I915_READ(WM1_LP_ILK);
3386                 reg_value &= ~(WM1_LP_LATENCY_MASK | WM1_LP_SR_MASK |
3387                                WM1_LP_CURSOR_MASK);
3388                 reg_value |= WM1_LP_SR_EN |
3389                              (ilk_sr_latency << WM1_LP_LATENCY_SHIFT) |
3390                              (sr_wm << WM1_LP_SR_SHIFT) | cursor_wm;
3391
3392                 I915_WRITE(WM1_LP_ILK, reg_value);
3393                 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
3394                                 "cursor %d\n", sr_wm, cursor_wm);
3395
3396         } else {
3397                 /* Turn off self refresh if both pipes are enabled */
3398                 I915_WRITE(WM1_LP_ILK, I915_READ(WM1_LP_ILK) & ~WM1_LP_SR_EN);
3399         }
3400 }
3401 /**
3402  * intel_update_watermarks - update FIFO watermark values based on current modes
3403  *
3404  * Calculate watermark values for the various WM regs based on current mode
3405  * and plane configuration.
3406  *
3407  * There are several cases to deal with here:
3408  *   - normal (i.e. non-self-refresh)
3409  *   - self-refresh (SR) mode
3410  *   - lines are large relative to FIFO size (buffer can hold up to 2)
3411  *   - lines are small relative to FIFO size (buffer can hold more than 2
3412  *     lines), so need to account for TLB latency
3413  *
3414  *   The normal calculation is:
3415  *     watermark = dotclock * bytes per pixel * latency
3416  *   where latency is platform & configuration dependent (we assume pessimal
3417  *   values here).
3418  *
3419  *   The SR calculation is:
3420  *     watermark = (trunc(latency/line time)+1) * surface width *
3421  *       bytes per pixel
3422  *   where
3423  *     line time = htotal / dotclock
3424  *     surface width = hdisplay for normal plane and 64 for cursor
3425  *   and latency is assumed to be high, as above.
3426  *
3427  * The final value programmed to the register should always be rounded up,
3428  * and include an extra 2 entries to account for clock crossings.
3429  *
3430  * We don't use the sprite, so we can ignore that.  And on Crestline we have
3431  * to set the non-SR watermarks to 8.
3432   */
3433 static void intel_update_watermarks(struct drm_device *dev)
3434 {
3435         struct drm_i915_private *dev_priv = dev->dev_private;
3436         struct drm_crtc *crtc;
3437         int sr_hdisplay = 0;
3438         unsigned long planea_clock = 0, planeb_clock = 0, sr_clock = 0;
3439         int enabled = 0, pixel_size = 0;
3440         int sr_htotal = 0;
3441
3442         if (!dev_priv->display.update_wm)
3443                 return;
3444
3445         /* Get the clock config from both planes */
3446         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
3447                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3448                 if (intel_crtc->dpms_mode == DRM_MODE_DPMS_ON) {
3449                         enabled++;
3450                         if (intel_crtc->plane == 0) {
3451                                 DRM_DEBUG_KMS("plane A (pipe %d) clock: %d\n",
3452                                           intel_crtc->pipe, crtc->mode.clock);
3453                                 planea_clock = crtc->mode.clock;
3454                         } else {
3455                                 DRM_DEBUG_KMS("plane B (pipe %d) clock: %d\n",
3456                                           intel_crtc->pipe, crtc->mode.clock);
3457                                 planeb_clock = crtc->mode.clock;
3458                         }
3459                         sr_hdisplay = crtc->mode.hdisplay;
3460                         sr_clock = crtc->mode.clock;
3461                         sr_htotal = crtc->mode.htotal;
3462                         if (crtc->fb)
3463                                 pixel_size = crtc->fb->bits_per_pixel / 8;
3464                         else
3465                                 pixel_size = 4; /* by default */
3466                 }
3467         }
3468
3469         if (enabled <= 0)
3470                 return;
3471
3472         dev_priv->display.update_wm(dev, planea_clock, planeb_clock,
3473                                     sr_hdisplay, sr_htotal, pixel_size);
3474 }
3475
3476 static int intel_crtc_mode_set(struct drm_crtc *crtc,
3477                                struct drm_display_mode *mode,
3478                                struct drm_display_mode *adjusted_mode,
3479                                int x, int y,
3480                                struct drm_framebuffer *old_fb)
3481 {
3482         struct drm_device *dev = crtc->dev;
3483         struct drm_i915_private *dev_priv = dev->dev_private;
3484         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3485         int pipe = intel_crtc->pipe;
3486         int plane = intel_crtc->plane;
3487         int fp_reg = (pipe == 0) ? FPA0 : FPB0;
3488         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
3489         int dpll_md_reg = (intel_crtc->pipe == 0) ? DPLL_A_MD : DPLL_B_MD;
3490         int dspcntr_reg = (plane == 0) ? DSPACNTR : DSPBCNTR;
3491         int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
3492         int htot_reg = (pipe == 0) ? HTOTAL_A : HTOTAL_B;
3493         int hblank_reg = (pipe == 0) ? HBLANK_A : HBLANK_B;
3494         int hsync_reg = (pipe == 0) ? HSYNC_A : HSYNC_B;
3495         int vtot_reg = (pipe == 0) ? VTOTAL_A : VTOTAL_B;
3496         int vblank_reg = (pipe == 0) ? VBLANK_A : VBLANK_B;
3497         int vsync_reg = (pipe == 0) ? VSYNC_A : VSYNC_B;
3498         int dspsize_reg = (plane == 0) ? DSPASIZE : DSPBSIZE;
3499         int dsppos_reg = (plane == 0) ? DSPAPOS : DSPBPOS;
3500         int pipesrc_reg = (pipe == 0) ? PIPEASRC : PIPEBSRC;
3501         int refclk, num_connectors = 0;
3502         intel_clock_t clock, reduced_clock;
3503         u32 dpll = 0, fp = 0, fp2 = 0, dspcntr, pipeconf;
3504         bool ok, has_reduced_clock = false, is_sdvo = false, is_dvo = false;
3505         bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
3506         struct intel_encoder *has_edp_encoder = NULL;
3507         struct drm_mode_config *mode_config = &dev->mode_config;
3508         struct drm_encoder *encoder;
3509         const intel_limit_t *limit;
3510         int ret;
3511         struct fdi_m_n m_n = {0};
3512         int data_m1_reg = (pipe == 0) ? PIPEA_DATA_M1 : PIPEB_DATA_M1;
3513         int data_n1_reg = (pipe == 0) ? PIPEA_DATA_N1 : PIPEB_DATA_N1;
3514         int link_m1_reg = (pipe == 0) ? PIPEA_LINK_M1 : PIPEB_LINK_M1;
3515         int link_n1_reg = (pipe == 0) ? PIPEA_LINK_N1 : PIPEB_LINK_N1;
3516         int pch_fp_reg = (pipe == 0) ? PCH_FPA0 : PCH_FPB0;
3517         int pch_dpll_reg = (pipe == 0) ? PCH_DPLL_A : PCH_DPLL_B;
3518         int fdi_rx_reg = (pipe == 0) ? FDI_RXA_CTL : FDI_RXB_CTL;
3519         int fdi_tx_reg = (pipe == 0) ? FDI_TXA_CTL : FDI_TXB_CTL;
3520         int trans_dpll_sel = (pipe == 0) ? 0 : 1;
3521         int lvds_reg = LVDS;
3522         u32 temp;
3523         int sdvo_pixel_multiply;
3524         int target_clock;
3525
3526         drm_vblank_pre_modeset(dev, pipe);
3527
3528         list_for_each_entry(encoder, &mode_config->encoder_list, head) {
3529                 struct intel_encoder *intel_encoder;
3530
3531                 if (encoder->crtc != crtc)
3532                         continue;
3533
3534                 intel_encoder = enc_to_intel_encoder(encoder);
3535                 switch (intel_encoder->type) {
3536                 case INTEL_OUTPUT_LVDS:
3537                         is_lvds = true;
3538                         break;
3539                 case INTEL_OUTPUT_SDVO:
3540                 case INTEL_OUTPUT_HDMI:
3541                         is_sdvo = true;
3542                         if (intel_encoder->needs_tv_clock)
3543                                 is_tv = true;
3544                         break;
3545                 case INTEL_OUTPUT_DVO:
3546                         is_dvo = true;
3547                         break;
3548                 case INTEL_OUTPUT_TVOUT:
3549                         is_tv = true;
3550                         break;
3551                 case INTEL_OUTPUT_ANALOG:
3552                         is_crt = true;
3553                         break;
3554                 case INTEL_OUTPUT_DISPLAYPORT:
3555                         is_dp = true;
3556                         break;
3557                 case INTEL_OUTPUT_EDP:
3558                         has_edp_encoder = intel_encoder;
3559                         break;
3560                 }
3561
3562                 num_connectors++;
3563         }
3564
3565         if (is_lvds && dev_priv->lvds_use_ssc && num_connectors < 2) {
3566                 refclk = dev_priv->lvds_ssc_freq * 1000;
3567                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
3568                                         refclk / 1000);
3569         } else if (IS_I9XX(dev)) {
3570                 refclk = 96000;
3571                 if (HAS_PCH_SPLIT(dev))
3572                         refclk = 120000; /* 120Mhz refclk */
3573         } else {
3574                 refclk = 48000;
3575         }
3576
3577
3578         /*
3579          * Returns a set of divisors for the desired target clock with the given
3580          * refclk, or FALSE.  The returned values represent the clock equation:
3581          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
3582          */
3583         limit = intel_limit(crtc);
3584         ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, &clock);
3585         if (!ok) {
3586                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
3587                 drm_vblank_post_modeset(dev, pipe);
3588                 return -EINVAL;
3589         }
3590
3591         /* Ensure that the cursor is valid for the new mode before changing... */
3592         intel_crtc_update_cursor(crtc);
3593
3594         if (is_lvds && dev_priv->lvds_downclock_avail) {
3595                 has_reduced_clock = limit->find_pll(limit, crtc,
3596                                                             dev_priv->lvds_downclock,
3597                                                             refclk,
3598                                                             &reduced_clock);
3599                 if (has_reduced_clock && (clock.p != reduced_clock.p)) {
3600                         /*
3601                          * If the different P is found, it means that we can't
3602                          * switch the display clock by using the FP0/FP1.
3603                          * In such case we will disable the LVDS downclock
3604                          * feature.
3605                          */
3606                         DRM_DEBUG_KMS("Different P is found for "
3607                                                 "LVDS clock/downclock\n");
3608                         has_reduced_clock = 0;
3609                 }
3610         }
3611         /* SDVO TV has fixed PLL values depend on its clock range,
3612            this mirrors vbios setting. */
3613         if (is_sdvo && is_tv) {
3614                 if (adjusted_mode->clock >= 100000
3615                                 && adjusted_mode->clock < 140500) {
3616                         clock.p1 = 2;
3617                         clock.p2 = 10;
3618                         clock.n = 3;
3619                         clock.m1 = 16;
3620                         clock.m2 = 8;
3621                 } else if (adjusted_mode->clock >= 140500
3622                                 && adjusted_mode->clock <= 200000) {
3623                         clock.p1 = 1;
3624                         clock.p2 = 10;
3625                         clock.n = 6;
3626                         clock.m1 = 12;
3627                         clock.m2 = 8;
3628                 }
3629         }
3630
3631         /* FDI link */
3632         if (HAS_PCH_SPLIT(dev)) {
3633                 int lane = 0, link_bw, bpp;
3634                 /* eDP doesn't require FDI link, so just set DP M/N
3635                    according to current link config */
3636                 if (has_edp_encoder) {
3637                         target_clock = mode->clock;
3638                         intel_edp_link_config(has_edp_encoder,
3639                                               &lane, &link_bw);
3640                 } else {
3641                         /* DP over FDI requires target mode clock
3642                            instead of link clock */
3643                         if (is_dp)
3644                                 target_clock = mode->clock;
3645                         else
3646                                 target_clock = adjusted_mode->clock;
3647                         link_bw = 270000;
3648                 }
3649
3650                 /* determine panel color depth */
3651                 temp = I915_READ(pipeconf_reg);
3652                 temp &= ~PIPE_BPC_MASK;
3653                 if (is_lvds) {
3654                         int lvds_reg = I915_READ(PCH_LVDS);
3655                         /* the BPC will be 6 if it is 18-bit LVDS panel */
3656                         if ((lvds_reg & LVDS_A3_POWER_MASK) == LVDS_A3_POWER_UP)
3657                                 temp |= PIPE_8BPC;
3658                         else
3659                                 temp |= PIPE_6BPC;
3660                 } else if (has_edp_encoder || (is_dp && intel_pch_has_edp(crtc))) {
3661                         switch (dev_priv->edp_bpp/3) {
3662                         case 8:
3663                                 temp |= PIPE_8BPC;
3664                                 break;
3665                         case 10:
3666                                 temp |= PIPE_10BPC;
3667                                 break;
3668                         case 6:
3669                                 temp |= PIPE_6BPC;
3670                                 break;
3671                         case 12:
3672                                 temp |= PIPE_12BPC;
3673                                 break;
3674                         }
3675                 } else
3676                         temp |= PIPE_8BPC;
3677                 I915_WRITE(pipeconf_reg, temp);
3678                 I915_READ(pipeconf_reg);
3679
3680                 switch (temp & PIPE_BPC_MASK) {
3681                 case PIPE_8BPC:
3682                         bpp = 24;
3683                         break;
3684                 case PIPE_10BPC:
3685                         bpp = 30;
3686                         break;
3687                 case PIPE_6BPC:
3688                         bpp = 18;
3689                         break;
3690                 case PIPE_12BPC:
3691                         bpp = 36;
3692                         break;
3693                 default:
3694                         DRM_ERROR("unknown pipe bpc value\n");
3695                         bpp = 24;
3696                 }
3697
3698                 if (!lane) {
3699                         /*
3700                          * Account for spread spectrum to avoid
3701                          * oversubscribing the link. Max center spread
3702                          * is 2.5%; use 5% for safety's sake.
3703                          */
3704                         u32 bps = target_clock * bpp * 21 / 20;
3705                         lane = bps / (link_bw * 8) + 1;
3706                 }
3707
3708                 intel_crtc->fdi_lanes = lane;
3709
3710                 ironlake_compute_m_n(bpp, lane, target_clock, link_bw, &m_n);
3711         }
3712
3713         /* Ironlake: try to setup display ref clock before DPLL
3714          * enabling. This is only under driver's control after
3715          * PCH B stepping, previous chipset stepping should be
3716          * ignoring this setting.
3717          */
3718         if (HAS_PCH_SPLIT(dev)) {
3719                 temp = I915_READ(PCH_DREF_CONTROL);
3720                 /* Always enable nonspread source */
3721                 temp &= ~DREF_NONSPREAD_SOURCE_MASK;
3722                 temp |= DREF_NONSPREAD_SOURCE_ENABLE;
3723                 I915_WRITE(PCH_DREF_CONTROL, temp);
3724                 POSTING_READ(PCH_DREF_CONTROL);
3725
3726                 temp &= ~DREF_SSC_SOURCE_MASK;
3727                 temp |= DREF_SSC_SOURCE_ENABLE;
3728                 I915_WRITE(PCH_DREF_CONTROL, temp);
3729                 POSTING_READ(PCH_DREF_CONTROL);
3730
3731                 udelay(200);
3732
3733                 if (has_edp_encoder) {
3734                         if (dev_priv->lvds_use_ssc) {
3735                                 temp |= DREF_SSC1_ENABLE;
3736                                 I915_WRITE(PCH_DREF_CONTROL, temp);
3737                                 POSTING_READ(PCH_DREF_CONTROL);
3738
3739                                 udelay(200);
3740
3741                                 temp &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
3742                                 temp |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
3743                                 I915_WRITE(PCH_DREF_CONTROL, temp);
3744                                 POSTING_READ(PCH_DREF_CONTROL);
3745                         } else {
3746                                 temp |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
3747                                 I915_WRITE(PCH_DREF_CONTROL, temp);
3748                                 POSTING_READ(PCH_DREF_CONTROL);
3749                         }
3750                 }
3751         }
3752
3753         if (IS_PINEVIEW(dev)) {
3754                 fp = (1 << clock.n) << 16 | clock.m1 << 8 | clock.m2;
3755                 if (has_reduced_clock)
3756                         fp2 = (1 << reduced_clock.n) << 16 |
3757                                 reduced_clock.m1 << 8 | reduced_clock.m2;
3758         } else {
3759                 fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
3760                 if (has_reduced_clock)
3761                         fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
3762                                 reduced_clock.m2;
3763         }
3764
3765         if (!HAS_PCH_SPLIT(dev))
3766                 dpll = DPLL_VGA_MODE_DIS;
3767
3768         if (IS_I9XX(dev)) {
3769                 if (is_lvds)
3770                         dpll |= DPLLB_MODE_LVDS;
3771                 else
3772                         dpll |= DPLLB_MODE_DAC_SERIAL;
3773                 if (is_sdvo) {
3774                         dpll |= DPLL_DVO_HIGH_SPEED;
3775                         sdvo_pixel_multiply = adjusted_mode->clock / mode->clock;
3776                         if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
3777                                 dpll |= (sdvo_pixel_multiply - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
3778                         else if (HAS_PCH_SPLIT(dev))
3779                                 dpll |= (sdvo_pixel_multiply - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
3780                 }
3781                 if (is_dp)
3782                         dpll |= DPLL_DVO_HIGH_SPEED;
3783
3784                 /* compute bitmask from p1 value */
3785                 if (IS_PINEVIEW(dev))
3786                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
3787                 else {
3788                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
3789                         /* also FPA1 */
3790                         if (HAS_PCH_SPLIT(dev))
3791                                 dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
3792                         if (IS_G4X(dev) && has_reduced_clock)
3793                                 dpll |= (1 << (reduced_clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
3794                 }
3795                 switch (clock.p2) {
3796                 case 5:
3797                         dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
3798                         break;
3799                 case 7:
3800                         dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
3801                         break;
3802                 case 10:
3803                         dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
3804                         break;
3805                 case 14:
3806                         dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
3807                         break;
3808                 }
3809                 if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev))
3810                         dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
3811         } else {
3812                 if (is_lvds) {
3813                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
3814                 } else {
3815                         if (clock.p1 == 2)
3816                                 dpll |= PLL_P1_DIVIDE_BY_TWO;
3817                         else
3818                                 dpll |= (clock.p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
3819                         if (clock.p2 == 4)
3820                                 dpll |= PLL_P2_DIVIDE_BY_4;
3821                 }
3822         }
3823
3824         if (is_sdvo && is_tv)
3825                 dpll |= PLL_REF_INPUT_TVCLKINBC;
3826         else if (is_tv)
3827                 /* XXX: just matching BIOS for now */
3828                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
3829                 dpll |= 3;
3830         else if (is_lvds && dev_priv->lvds_use_ssc && num_connectors < 2)
3831                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
3832         else
3833                 dpll |= PLL_REF_INPUT_DREFCLK;
3834
3835         /* setup pipeconf */
3836         pipeconf = I915_READ(pipeconf_reg);
3837
3838         /* Set up the display plane register */
3839         dspcntr = DISPPLANE_GAMMA_ENABLE;
3840
3841         /* Ironlake's plane is forced to pipe, bit 24 is to
3842            enable color space conversion */
3843         if (!HAS_PCH_SPLIT(dev)) {
3844                 if (pipe == 0)
3845                         dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
3846                 else
3847                         dspcntr |= DISPPLANE_SEL_PIPE_B;
3848         }
3849
3850         if (pipe == 0 && !IS_I965G(dev)) {
3851                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
3852                  * core speed.
3853                  *
3854                  * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
3855                  * pipe == 0 check?
3856                  */
3857                 if (mode->clock >
3858                     dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
3859                         pipeconf |= PIPEACONF_DOUBLE_WIDE;
3860                 else
3861                         pipeconf &= ~PIPEACONF_DOUBLE_WIDE;
3862         }
3863
3864         dspcntr |= DISPLAY_PLANE_ENABLE;
3865         pipeconf |= PIPEACONF_ENABLE;
3866         dpll |= DPLL_VCO_ENABLE;
3867
3868
3869         /* Disable the panel fitter if it was on our pipe */
3870         if (!HAS_PCH_SPLIT(dev) && intel_panel_fitter_pipe(dev) == pipe)
3871                 I915_WRITE(PFIT_CONTROL, 0);
3872
3873         DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
3874         drm_mode_debug_printmodeline(mode);
3875
3876         /* assign to Ironlake registers */
3877         if (HAS_PCH_SPLIT(dev)) {
3878                 fp_reg = pch_fp_reg;
3879                 dpll_reg = pch_dpll_reg;
3880         }
3881
3882         if (!has_edp_encoder) {
3883                 I915_WRITE(fp_reg, fp);
3884                 I915_WRITE(dpll_reg, dpll & ~DPLL_VCO_ENABLE);
3885                 I915_READ(dpll_reg);
3886                 udelay(150);
3887         }
3888
3889         /* enable transcoder DPLL */
3890         if (HAS_PCH_CPT(dev)) {
3891                 temp = I915_READ(PCH_DPLL_SEL);
3892                 if (trans_dpll_sel == 0)
3893                         temp |= (TRANSA_DPLL_ENABLE | TRANSA_DPLLA_SEL);
3894                 else
3895                         temp |= (TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
3896                 I915_WRITE(PCH_DPLL_SEL, temp);
3897                 I915_READ(PCH_DPLL_SEL);
3898                 udelay(150);
3899         }
3900
3901         if (HAS_PCH_SPLIT(dev)) {
3902                 pipeconf &= ~PIPE_ENABLE_DITHER;
3903                 pipeconf &= ~PIPE_DITHER_TYPE_MASK;
3904         }
3905
3906         /* The LVDS pin pair needs to be on before the DPLLs are enabled.
3907          * This is an exception to the general rule that mode_set doesn't turn
3908          * things on.
3909          */
3910         if (is_lvds) {
3911                 u32 lvds;
3912
3913                 if (HAS_PCH_SPLIT(dev))
3914                         lvds_reg = PCH_LVDS;
3915
3916                 lvds = I915_READ(lvds_reg);
3917                 lvds |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
3918                 if (pipe == 1) {
3919                         if (HAS_PCH_CPT(dev))
3920                                 lvds |= PORT_TRANS_B_SEL_CPT;
3921                         else
3922                                 lvds |= LVDS_PIPEB_SELECT;
3923                 } else {
3924                         if (HAS_PCH_CPT(dev))
3925                                 lvds &= ~PORT_TRANS_SEL_MASK;
3926                         else
3927                                 lvds &= ~LVDS_PIPEB_SELECT;
3928                 }
3929                 /* set the corresponsding LVDS_BORDER bit */
3930                 lvds |= dev_priv->lvds_border_bits;
3931                 /* Set the B0-B3 data pairs corresponding to whether we're going to
3932                  * set the DPLLs for dual-channel mode or not.
3933                  */
3934                 if (clock.p2 == 7)
3935                         lvds |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
3936                 else
3937                         lvds &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
3938
3939                 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
3940                  * appropriately here, but we need to look more thoroughly into how
3941                  * panels behave in the two modes.
3942                  */
3943                 /* set the dithering flag */
3944                 if (IS_I965G(dev)) {
3945                         if (dev_priv->lvds_dither) {
3946                                 if (HAS_PCH_SPLIT(dev)) {
3947                                         pipeconf |= PIPE_ENABLE_DITHER;
3948                                         pipeconf |= PIPE_DITHER_TYPE_ST01;
3949                                 } else
3950                                         lvds |= LVDS_ENABLE_DITHER;
3951                         } else {
3952                                 if (!HAS_PCH_SPLIT(dev)) {
3953                                         lvds &= ~LVDS_ENABLE_DITHER;
3954                                 }
3955                         }
3956                 }
3957                 I915_WRITE(lvds_reg, lvds);
3958                 I915_READ(lvds_reg);
3959         }
3960         if (is_dp)
3961                 intel_dp_set_m_n(crtc, mode, adjusted_mode);
3962         else if (HAS_PCH_SPLIT(dev)) {
3963                 /* For non-DP output, clear any trans DP clock recovery setting.*/
3964                 if (pipe == 0) {
3965                         I915_WRITE(TRANSA_DATA_M1, 0);
3966                         I915_WRITE(TRANSA_DATA_N1, 0);
3967                         I915_WRITE(TRANSA_DP_LINK_M1, 0);
3968                         I915_WRITE(TRANSA_DP_LINK_N1, 0);
3969                 } else {
3970                         I915_WRITE(TRANSB_DATA_M1, 0);
3971                         I915_WRITE(TRANSB_DATA_N1, 0);
3972                         I915_WRITE(TRANSB_DP_LINK_M1, 0);
3973                         I915_WRITE(TRANSB_DP_LINK_N1, 0);
3974                 }
3975         }
3976
3977         if (!has_edp_encoder) {
3978                 I915_WRITE(fp_reg, fp);
3979                 I915_WRITE(dpll_reg, dpll);
3980                 I915_READ(dpll_reg);
3981                 /* Wait for the clocks to stabilize. */
3982                 udelay(150);
3983
3984                 if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev)) {
3985                         if (is_sdvo) {
3986                                 sdvo_pixel_multiply = adjusted_mode->clock / mode->clock;
3987                                 I915_WRITE(dpll_md_reg, (0 << DPLL_MD_UDI_DIVIDER_SHIFT) |
3988                                         ((sdvo_pixel_multiply - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT));
3989                         } else
3990                                 I915_WRITE(dpll_md_reg, 0);
3991                 } else {
3992                         /* write it again -- the BIOS does, after all */
3993                         I915_WRITE(dpll_reg, dpll);
3994                 }
3995                 I915_READ(dpll_reg);
3996                 /* Wait for the clocks to stabilize. */
3997                 udelay(150);
3998         }
3999
4000         if (is_lvds && has_reduced_clock && i915_powersave) {
4001                 I915_WRITE(fp_reg + 4, fp2);
4002                 intel_crtc->lowfreq_avail = true;
4003                 if (HAS_PIPE_CXSR(dev)) {
4004                         DRM_DEBUG_KMS("enabling CxSR downclocking\n");
4005                         pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
4006                 }
4007         } else {
4008                 I915_WRITE(fp_reg + 4, fp);
4009                 intel_crtc->lowfreq_avail = false;
4010                 if (HAS_PIPE_CXSR(dev)) {
4011                         DRM_DEBUG_KMS("disabling CxSR downclocking\n");
4012                         pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
4013                 }
4014         }
4015
4016         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
4017                 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
4018                 /* the chip adds 2 halflines automatically */
4019                 adjusted_mode->crtc_vdisplay -= 1;
4020                 adjusted_mode->crtc_vtotal -= 1;
4021                 adjusted_mode->crtc_vblank_start -= 1;
4022                 adjusted_mode->crtc_vblank_end -= 1;
4023                 adjusted_mode->crtc_vsync_end -= 1;
4024                 adjusted_mode->crtc_vsync_start -= 1;
4025         } else
4026                 pipeconf &= ~PIPECONF_INTERLACE_W_FIELD_INDICATION; /* progressive */
4027
4028         I915_WRITE(htot_reg, (adjusted_mode->crtc_hdisplay - 1) |
4029                    ((adjusted_mode->crtc_htotal - 1) << 16));
4030         I915_WRITE(hblank_reg, (adjusted_mode->crtc_hblank_start - 1) |
4031                    ((adjusted_mode->crtc_hblank_end - 1) << 16));
4032         I915_WRITE(hsync_reg, (adjusted_mode->crtc_hsync_start - 1) |
4033                    ((adjusted_mode->crtc_hsync_end - 1) << 16));
4034         I915_WRITE(vtot_reg, (adjusted_mode->crtc_vdisplay - 1) |
4035                    ((adjusted_mode->crtc_vtotal - 1) << 16));
4036         I915_WRITE(vblank_reg, (adjusted_mode->crtc_vblank_start - 1) |
4037                    ((adjusted_mode->crtc_vblank_end - 1) << 16));
4038         I915_WRITE(vsync_reg, (adjusted_mode->crtc_vsync_start - 1) |
4039                    ((adjusted_mode->crtc_vsync_end - 1) << 16));
4040         /* pipesrc and dspsize control the size that is scaled from, which should
4041          * always be the user's requested size.
4042          */
4043         if (!HAS_PCH_SPLIT(dev)) {
4044                 I915_WRITE(dspsize_reg, ((mode->vdisplay - 1) << 16) |
4045                                 (mode->hdisplay - 1));
4046                 I915_WRITE(dsppos_reg, 0);
4047         }
4048         I915_WRITE(pipesrc_reg, ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
4049
4050         if (HAS_PCH_SPLIT(dev)) {
4051                 I915_WRITE(data_m1_reg, TU_SIZE(m_n.tu) | m_n.gmch_m);
4052                 I915_WRITE(data_n1_reg, TU_SIZE(m_n.tu) | m_n.gmch_n);
4053                 I915_WRITE(link_m1_reg, m_n.link_m);
4054                 I915_WRITE(link_n1_reg, m_n.link_n);
4055
4056                 if (has_edp_encoder) {
4057                         ironlake_set_pll_edp(crtc, adjusted_mode->clock);
4058                 } else {
4059                         /* enable FDI RX PLL too */
4060                         temp = I915_READ(fdi_rx_reg);
4061                         I915_WRITE(fdi_rx_reg, temp | FDI_RX_PLL_ENABLE);
4062                         I915_READ(fdi_rx_reg);
4063                         udelay(200);
4064
4065                         /* enable FDI TX PLL too */
4066                         temp = I915_READ(fdi_tx_reg);
4067                         I915_WRITE(fdi_tx_reg, temp | FDI_TX_PLL_ENABLE);
4068                         I915_READ(fdi_tx_reg);
4069
4070                         /* enable FDI RX PCDCLK */
4071                         temp = I915_READ(fdi_rx_reg);
4072                         I915_WRITE(fdi_rx_reg, temp | FDI_SEL_PCDCLK);
4073                         I915_READ(fdi_rx_reg);
4074                         udelay(200);
4075                 }
4076         }
4077
4078         I915_WRITE(pipeconf_reg, pipeconf);
4079         I915_READ(pipeconf_reg);
4080
4081         intel_wait_for_vblank(dev, pipe);
4082
4083         if (IS_IRONLAKE(dev)) {
4084                 /* enable address swizzle for tiling buffer */
4085                 temp = I915_READ(DISP_ARB_CTL);
4086                 I915_WRITE(DISP_ARB_CTL, temp | DISP_TILE_SURFACE_SWIZZLING);
4087         }
4088
4089         I915_WRITE(dspcntr_reg, dspcntr);
4090
4091         /* Flush the plane changes */
4092         ret = intel_pipe_set_base(crtc, x, y, old_fb);
4093
4094         intel_update_watermarks(dev);
4095
4096         drm_vblank_post_modeset(dev, pipe);
4097
4098         return ret;
4099 }
4100
4101 /** Loads the palette/gamma unit for the CRTC with the prepared values */
4102 void intel_crtc_load_lut(struct drm_crtc *crtc)
4103 {
4104         struct drm_device *dev = crtc->dev;
4105         struct drm_i915_private *dev_priv = dev->dev_private;
4106         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4107         int palreg = (intel_crtc->pipe == 0) ? PALETTE_A : PALETTE_B;
4108         int i;
4109
4110         /* The clocks have to be on to load the palette. */
4111         if (!crtc->enabled)
4112                 return;
4113
4114         /* use legacy palette for Ironlake */
4115         if (HAS_PCH_SPLIT(dev))
4116                 palreg = (intel_crtc->pipe == 0) ? LGC_PALETTE_A :
4117                                                    LGC_PALETTE_B;
4118
4119         for (i = 0; i < 256; i++) {
4120                 I915_WRITE(palreg + 4 * i,
4121                            (intel_crtc->lut_r[i] << 16) |
4122                            (intel_crtc->lut_g[i] << 8) |
4123                            intel_crtc->lut_b[i]);
4124         }
4125 }
4126
4127 static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
4128 {
4129         struct drm_device *dev = crtc->dev;
4130         struct drm_i915_private *dev_priv = dev->dev_private;
4131         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4132         bool visible = base != 0;
4133         u32 cntl;
4134
4135         if (intel_crtc->cursor_visible == visible)
4136                 return;
4137
4138         cntl = I915_READ(CURACNTR);
4139         if (visible) {
4140                 /* On these chipsets we can only modify the base whilst
4141                  * the cursor is disabled.
4142                  */
4143                 I915_WRITE(CURABASE, base);
4144
4145                 cntl &= ~(CURSOR_FORMAT_MASK);
4146                 /* XXX width must be 64, stride 256 => 0x00 << 28 */
4147                 cntl |= CURSOR_ENABLE |
4148                         CURSOR_GAMMA_ENABLE |
4149                         CURSOR_FORMAT_ARGB;
4150         } else
4151                 cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
4152         I915_WRITE(CURACNTR, cntl);
4153
4154         intel_crtc->cursor_visible = visible;
4155 }
4156
4157 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
4158 {
4159         struct drm_device *dev = crtc->dev;
4160         struct drm_i915_private *dev_priv = dev->dev_private;
4161         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4162         int pipe = intel_crtc->pipe;
4163         bool visible = base != 0;
4164
4165         if (intel_crtc->cursor_visible != visible) {
4166                 uint32_t cntl = I915_READ(pipe == 0 ? CURACNTR : CURBCNTR);
4167                 if (base) {
4168                         cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
4169                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
4170                         cntl |= pipe << 28; /* Connect to correct pipe */
4171                 } else {
4172                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
4173                         cntl |= CURSOR_MODE_DISABLE;
4174                 }
4175                 I915_WRITE(pipe == 0 ? CURACNTR : CURBCNTR, cntl);
4176
4177                 intel_crtc->cursor_visible = visible;
4178         }
4179         /* and commit changes on next vblank */
4180         I915_WRITE(pipe == 0 ? CURABASE : CURBBASE, base);
4181 }
4182
4183 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
4184 static void intel_crtc_update_cursor(struct drm_crtc *crtc)
4185 {
4186         struct drm_device *dev = crtc->dev;
4187         struct drm_i915_private *dev_priv = dev->dev_private;
4188         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4189         int pipe = intel_crtc->pipe;
4190         int x = intel_crtc->cursor_x;
4191         int y = intel_crtc->cursor_y;
4192         u32 base, pos;
4193         bool visible;
4194
4195         pos = 0;
4196
4197         if (intel_crtc->cursor_on && crtc->fb) {
4198                 base = intel_crtc->cursor_addr;
4199                 if (x > (int) crtc->fb->width)
4200                         base = 0;
4201
4202                 if (y > (int) crtc->fb->height)
4203                         base = 0;
4204         } else
4205                 base = 0;
4206
4207         if (x < 0) {
4208                 if (x + intel_crtc->cursor_width < 0)
4209                         base = 0;
4210
4211                 pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
4212                 x = -x;
4213         }
4214         pos |= x << CURSOR_X_SHIFT;
4215
4216         if (y < 0) {
4217                 if (y + intel_crtc->cursor_height < 0)
4218                         base = 0;
4219
4220                 pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
4221                 y = -y;
4222         }
4223         pos |= y << CURSOR_Y_SHIFT;
4224
4225         visible = base != 0;
4226         if (!visible && !intel_crtc->cursor_visible)
4227                 return;
4228
4229         I915_WRITE(pipe == 0 ? CURAPOS : CURBPOS, pos);
4230         if (IS_845G(dev) || IS_I865G(dev))
4231                 i845_update_cursor(crtc, base);
4232         else
4233                 i9xx_update_cursor(crtc, base);
4234
4235         if (visible)
4236                 intel_mark_busy(dev, to_intel_framebuffer(crtc->fb)->obj);
4237 }
4238
4239 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
4240                                  struct drm_file *file_priv,
4241                                  uint32_t handle,
4242                                  uint32_t width, uint32_t height)
4243 {
4244         struct drm_device *dev = crtc->dev;
4245         struct drm_i915_private *dev_priv = dev->dev_private;
4246         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4247         struct drm_gem_object *bo;
4248         struct drm_i915_gem_object *obj_priv;
4249         uint32_t addr;
4250         int ret;
4251
4252         DRM_DEBUG_KMS("\n");
4253
4254         /* if we want to turn off the cursor ignore width and height */
4255         if (!handle) {
4256                 DRM_DEBUG_KMS("cursor off\n");
4257                 addr = 0;
4258                 bo = NULL;
4259                 mutex_lock(&dev->struct_mutex);
4260                 goto finish;
4261         }
4262
4263         /* Currently we only support 64x64 cursors */
4264         if (width != 64 || height != 64) {
4265                 DRM_ERROR("we currently only support 64x64 cursors\n");
4266                 return -EINVAL;
4267         }
4268
4269         bo = drm_gem_object_lookup(dev, file_priv, handle);
4270         if (!bo)
4271                 return -ENOENT;
4272
4273         obj_priv = to_intel_bo(bo);
4274
4275         if (bo->size < width * height * 4) {
4276                 DRM_ERROR("buffer is to small\n");
4277                 ret = -ENOMEM;
4278                 goto fail;
4279         }
4280
4281         /* we only need to pin inside GTT if cursor is non-phy */
4282         mutex_lock(&dev->struct_mutex);
4283         if (!dev_priv->info->cursor_needs_physical) {
4284                 ret = i915_gem_object_pin(bo, PAGE_SIZE);
4285                 if (ret) {
4286                         DRM_ERROR("failed to pin cursor bo\n");
4287                         goto fail_locked;
4288                 }
4289
4290                 ret = i915_gem_object_set_to_gtt_domain(bo, 0);
4291                 if (ret) {
4292                         DRM_ERROR("failed to move cursor bo into the GTT\n");
4293                         goto fail_unpin;
4294                 }
4295
4296                 addr = obj_priv->gtt_offset;
4297         } else {
4298                 int align = IS_I830(dev) ? 16 * 1024 : 256;
4299                 ret = i915_gem_attach_phys_object(dev, bo,
4300                                                   (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
4301                                                   align);
4302                 if (ret) {
4303                         DRM_ERROR("failed to attach phys object\n");
4304                         goto fail_locked;
4305                 }
4306                 addr = obj_priv->phys_obj->handle->busaddr;
4307         }
4308
4309         if (!IS_I9XX(dev))
4310                 I915_WRITE(CURSIZE, (height << 12) | width);
4311
4312  finish:
4313         if (intel_crtc->cursor_bo) {
4314                 if (dev_priv->info->cursor_needs_physical) {
4315                         if (intel_crtc->cursor_bo != bo)
4316                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
4317                 } else
4318                         i915_gem_object_unpin(intel_crtc->cursor_bo);
4319                 drm_gem_object_unreference(intel_crtc->cursor_bo);
4320         }
4321
4322         mutex_unlock(&dev->struct_mutex);
4323
4324         intel_crtc->cursor_addr = addr;
4325         intel_crtc->cursor_bo = bo;
4326         intel_crtc->cursor_width = width;
4327         intel_crtc->cursor_height = height;
4328
4329         intel_crtc_update_cursor(crtc);
4330
4331         return 0;
4332 fail_unpin:
4333         i915_gem_object_unpin(bo);
4334 fail_locked:
4335         mutex_unlock(&dev->struct_mutex);
4336 fail:
4337         drm_gem_object_unreference_unlocked(bo);
4338         return ret;
4339 }
4340
4341 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
4342 {
4343         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4344
4345         intel_crtc->cursor_x = x;
4346         intel_crtc->cursor_y = y;
4347
4348         intel_crtc_update_cursor(crtc);
4349
4350         return 0;
4351 }
4352
4353 /** Sets the color ramps on behalf of RandR */
4354 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
4355                                  u16 blue, int regno)
4356 {
4357         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4358
4359         intel_crtc->lut_r[regno] = red >> 8;
4360         intel_crtc->lut_g[regno] = green >> 8;
4361         intel_crtc->lut_b[regno] = blue >> 8;
4362 }
4363
4364 void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
4365                              u16 *blue, int regno)
4366 {
4367         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4368
4369         *red = intel_crtc->lut_r[regno] << 8;
4370         *green = intel_crtc->lut_g[regno] << 8;
4371         *blue = intel_crtc->lut_b[regno] << 8;
4372 }
4373
4374 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
4375                                  u16 *blue, uint32_t start, uint32_t size)
4376 {
4377         int end = (start + size > 256) ? 256 : start + size, i;
4378         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4379
4380         for (i = start; i < end; i++) {
4381                 intel_crtc->lut_r[i] = red[i] >> 8;
4382                 intel_crtc->lut_g[i] = green[i] >> 8;
4383                 intel_crtc->lut_b[i] = blue[i] >> 8;
4384         }
4385
4386         intel_crtc_load_lut(crtc);
4387 }
4388
4389 /**
4390  * Get a pipe with a simple mode set on it for doing load-based monitor
4391  * detection.
4392  *
4393  * It will be up to the load-detect code to adjust the pipe as appropriate for
4394  * its requirements.  The pipe will be connected to no other encoders.
4395  *
4396  * Currently this code will only succeed if there is a pipe with no encoders
4397  * configured for it.  In the future, it could choose to temporarily disable
4398  * some outputs to free up a pipe for its use.
4399  *
4400  * \return crtc, or NULL if no pipes are available.
4401  */
4402
4403 /* VESA 640x480x72Hz mode to set on the pipe */
4404 static struct drm_display_mode load_detect_mode = {
4405         DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
4406                  704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
4407 };
4408
4409 struct drm_crtc *intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
4410                                             struct drm_connector *connector,
4411                                             struct drm_display_mode *mode,
4412                                             int *dpms_mode)
4413 {
4414         struct intel_crtc *intel_crtc;
4415         struct drm_crtc *possible_crtc;
4416         struct drm_crtc *supported_crtc =NULL;
4417         struct drm_encoder *encoder = &intel_encoder->enc;
4418         struct drm_crtc *crtc = NULL;
4419         struct drm_device *dev = encoder->dev;
4420         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
4421         struct drm_crtc_helper_funcs *crtc_funcs;
4422         int i = -1;
4423
4424         /*
4425          * Algorithm gets a little messy:
4426          *   - if the connector already has an assigned crtc, use it (but make
4427          *     sure it's on first)
4428          *   - try to find the first unused crtc that can drive this connector,
4429          *     and use that if we find one
4430          *   - if there are no unused crtcs available, try to use the first
4431          *     one we found that supports the connector
4432          */
4433
4434         /* See if we already have a CRTC for this connector */
4435         if (encoder->crtc) {
4436                 crtc = encoder->crtc;
4437                 /* Make sure the crtc and connector are running */
4438                 intel_crtc = to_intel_crtc(crtc);
4439                 *dpms_mode = intel_crtc->dpms_mode;
4440                 if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
4441                         crtc_funcs = crtc->helper_private;
4442                         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
4443                         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
4444                 }
4445                 return crtc;
4446         }
4447
4448         /* Find an unused one (if possible) */
4449         list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
4450                 i++;
4451                 if (!(encoder->possible_crtcs & (1 << i)))
4452                         continue;
4453                 if (!possible_crtc->enabled) {
4454                         crtc = possible_crtc;
4455                         break;
4456                 }
4457                 if (!supported_crtc)
4458                         supported_crtc = possible_crtc;
4459         }
4460
4461         /*
4462          * If we didn't find an unused CRTC, don't use any.
4463          */
4464         if (!crtc) {
4465                 return NULL;
4466         }
4467
4468         encoder->crtc = crtc;
4469         connector->encoder = encoder;
4470         intel_encoder->load_detect_temp = true;
4471
4472         intel_crtc = to_intel_crtc(crtc);
4473         *dpms_mode = intel_crtc->dpms_mode;
4474
4475         if (!crtc->enabled) {
4476                 if (!mode)
4477                         mode = &load_detect_mode;
4478                 drm_crtc_helper_set_mode(crtc, mode, 0, 0, crtc->fb);
4479         } else {
4480                 if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
4481                         crtc_funcs = crtc->helper_private;
4482                         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
4483                 }
4484
4485                 /* Add this connector to the crtc */
4486                 encoder_funcs->mode_set(encoder, &crtc->mode, &crtc->mode);
4487                 encoder_funcs->commit(encoder);
4488         }
4489         /* let the connector get through one full cycle before testing */
4490         intel_wait_for_vblank(dev, intel_crtc->pipe);
4491
4492         return crtc;
4493 }
4494
4495 void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
4496                                     struct drm_connector *connector, int dpms_mode)
4497 {
4498         struct drm_encoder *encoder = &intel_encoder->enc;
4499         struct drm_device *dev = encoder->dev;
4500         struct drm_crtc *crtc = encoder->crtc;
4501         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
4502         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
4503
4504         if (intel_encoder->load_detect_temp) {
4505                 encoder->crtc = NULL;
4506                 connector->encoder = NULL;
4507                 intel_encoder->load_detect_temp = false;
4508                 crtc->enabled = drm_helper_crtc_in_use(crtc);
4509                 drm_helper_disable_unused_functions(dev);
4510         }
4511
4512         /* Switch crtc and encoder back off if necessary */
4513         if (crtc->enabled && dpms_mode != DRM_MODE_DPMS_ON) {
4514                 if (encoder->crtc == crtc)
4515                         encoder_funcs->dpms(encoder, dpms_mode);
4516                 crtc_funcs->dpms(crtc, dpms_mode);
4517         }
4518 }
4519
4520 /* Returns the clock of the currently programmed mode of the given pipe. */
4521 static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
4522 {
4523         struct drm_i915_private *dev_priv = dev->dev_private;
4524         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4525         int pipe = intel_crtc->pipe;
4526         u32 dpll = I915_READ((pipe == 0) ? DPLL_A : DPLL_B);
4527         u32 fp;
4528         intel_clock_t clock;
4529
4530         if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
4531                 fp = I915_READ((pipe == 0) ? FPA0 : FPB0);
4532         else
4533                 fp = I915_READ((pipe == 0) ? FPA1 : FPB1);
4534
4535         clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
4536         if (IS_PINEVIEW(dev)) {
4537                 clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
4538                 clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
4539         } else {
4540                 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
4541                 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
4542         }
4543
4544         if (IS_I9XX(dev)) {
4545                 if (IS_PINEVIEW(dev))
4546                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
4547                                 DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
4548                 else
4549                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
4550                                DPLL_FPA01_P1_POST_DIV_SHIFT);
4551
4552                 switch (dpll & DPLL_MODE_MASK) {
4553                 case DPLLB_MODE_DAC_SERIAL:
4554                         clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
4555                                 5 : 10;
4556                         break;
4557                 case DPLLB_MODE_LVDS:
4558                         clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
4559                                 7 : 14;
4560                         break;
4561                 default:
4562                         DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
4563                                   "mode\n", (int)(dpll & DPLL_MODE_MASK));
4564                         return 0;
4565                 }
4566
4567                 /* XXX: Handle the 100Mhz refclk */
4568                 intel_clock(dev, 96000, &clock);
4569         } else {
4570                 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
4571
4572                 if (is_lvds) {
4573                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
4574                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
4575                         clock.p2 = 14;
4576
4577                         if ((dpll & PLL_REF_INPUT_MASK) ==
4578                             PLLB_REF_INPUT_SPREADSPECTRUMIN) {
4579                                 /* XXX: might not be 66MHz */
4580                                 intel_clock(dev, 66000, &clock);
4581                         } else
4582                                 intel_clock(dev, 48000, &clock);
4583                 } else {
4584                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
4585                                 clock.p1 = 2;
4586                         else {
4587                                 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
4588                                             DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
4589                         }
4590                         if (dpll & PLL_P2_DIVIDE_BY_4)
4591                                 clock.p2 = 4;
4592                         else
4593                                 clock.p2 = 2;
4594
4595                         intel_clock(dev, 48000, &clock);
4596                 }
4597         }
4598
4599         /* XXX: It would be nice to validate the clocks, but we can't reuse
4600          * i830PllIsValid() because it relies on the xf86_config connector
4601          * configuration being accurate, which it isn't necessarily.
4602          */
4603
4604         return clock.dot;
4605 }
4606
4607 /** Returns the currently programmed mode of the given pipe. */
4608 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
4609                                              struct drm_crtc *crtc)
4610 {
4611         struct drm_i915_private *dev_priv = dev->dev_private;
4612         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4613         int pipe = intel_crtc->pipe;
4614         struct drm_display_mode *mode;
4615         int htot = I915_READ((pipe == 0) ? HTOTAL_A : HTOTAL_B);
4616         int hsync = I915_READ((pipe == 0) ? HSYNC_A : HSYNC_B);
4617         int vtot = I915_READ((pipe == 0) ? VTOTAL_A : VTOTAL_B);
4618         int vsync = I915_READ((pipe == 0) ? VSYNC_A : VSYNC_B);
4619
4620         mode = kzalloc(sizeof(*mode), GFP_KERNEL);
4621         if (!mode)
4622                 return NULL;
4623
4624         mode->clock = intel_crtc_clock_get(dev, crtc);
4625         mode->hdisplay = (htot & 0xffff) + 1;
4626         mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
4627         mode->hsync_start = (hsync & 0xffff) + 1;
4628         mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
4629         mode->vdisplay = (vtot & 0xffff) + 1;
4630         mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
4631         mode->vsync_start = (vsync & 0xffff) + 1;
4632         mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
4633
4634         drm_mode_set_name(mode);
4635         drm_mode_set_crtcinfo(mode, 0);
4636
4637         return mode;
4638 }
4639
4640 #define GPU_IDLE_TIMEOUT 500 /* ms */
4641
4642 /* When this timer fires, we've been idle for awhile */
4643 static void intel_gpu_idle_timer(unsigned long arg)
4644 {
4645         struct drm_device *dev = (struct drm_device *)arg;
4646         drm_i915_private_t *dev_priv = dev->dev_private;
4647
4648         DRM_DEBUG_DRIVER("idle timer fired, downclocking\n");
4649
4650         dev_priv->busy = false;
4651
4652         queue_work(dev_priv->wq, &dev_priv->idle_work);
4653 }
4654
4655 #define CRTC_IDLE_TIMEOUT 1000 /* ms */
4656
4657 static void intel_crtc_idle_timer(unsigned long arg)
4658 {
4659         struct intel_crtc *intel_crtc = (struct intel_crtc *)arg;
4660         struct drm_crtc *crtc = &intel_crtc->base;
4661         drm_i915_private_t *dev_priv = crtc->dev->dev_private;
4662
4663         DRM_DEBUG_DRIVER("idle timer fired, downclocking\n");
4664
4665         intel_crtc->busy = false;
4666
4667         queue_work(dev_priv->wq, &dev_priv->idle_work);
4668 }
4669
4670 static void intel_increase_pllclock(struct drm_crtc *crtc, bool schedule)
4671 {
4672         struct drm_device *dev = crtc->dev;
4673         drm_i915_private_t *dev_priv = dev->dev_private;
4674         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4675         int pipe = intel_crtc->pipe;
4676         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
4677         int dpll = I915_READ(dpll_reg);
4678
4679         if (HAS_PCH_SPLIT(dev))
4680                 return;
4681
4682         if (!dev_priv->lvds_downclock_avail)
4683                 return;
4684
4685         if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
4686                 DRM_DEBUG_DRIVER("upclocking LVDS\n");
4687
4688                 /* Unlock panel regs */
4689                 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
4690                            PANEL_UNLOCK_REGS);
4691
4692                 dpll &= ~DISPLAY_RATE_SELECT_FPA1;
4693                 I915_WRITE(dpll_reg, dpll);
4694                 dpll = I915_READ(dpll_reg);
4695                 intel_wait_for_vblank(dev, pipe);
4696                 dpll = I915_READ(dpll_reg);
4697                 if (dpll & DISPLAY_RATE_SELECT_FPA1)
4698                         DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");
4699
4700                 /* ...and lock them again */
4701                 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
4702         }
4703
4704         /* Schedule downclock */
4705         if (schedule)
4706                 mod_timer(&intel_crtc->idle_timer, jiffies +
4707                           msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
4708 }
4709
4710 static void intel_decrease_pllclock(struct drm_crtc *crtc)
4711 {
4712         struct drm_device *dev = crtc->dev;
4713         drm_i915_private_t *dev_priv = dev->dev_private;
4714         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4715         int pipe = intel_crtc->pipe;
4716         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
4717         int dpll = I915_READ(dpll_reg);
4718
4719         if (HAS_PCH_SPLIT(dev))
4720                 return;
4721
4722         if (!dev_priv->lvds_downclock_avail)
4723                 return;
4724
4725         /*
4726          * Since this is called by a timer, we should never get here in
4727          * the manual case.
4728          */
4729         if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
4730                 DRM_DEBUG_DRIVER("downclocking LVDS\n");
4731
4732                 /* Unlock panel regs */
4733                 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
4734                            PANEL_UNLOCK_REGS);
4735
4736                 dpll |= DISPLAY_RATE_SELECT_FPA1;
4737                 I915_WRITE(dpll_reg, dpll);
4738                 dpll = I915_READ(dpll_reg);
4739                 intel_wait_for_vblank(dev, pipe);
4740                 dpll = I915_READ(dpll_reg);
4741                 if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
4742                         DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");
4743
4744                 /* ...and lock them again */
4745                 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
4746         }
4747
4748 }
4749
4750 /**
4751  * intel_idle_update - adjust clocks for idleness
4752  * @work: work struct
4753  *
4754  * Either the GPU or display (or both) went idle.  Check the busy status
4755  * here and adjust the CRTC and GPU clocks as necessary.
4756  */
4757 static void intel_idle_update(struct work_struct *work)
4758 {
4759         drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
4760                                                     idle_work);
4761         struct drm_device *dev = dev_priv->dev;
4762         struct drm_crtc *crtc;
4763         struct intel_crtc *intel_crtc;
4764         int enabled = 0;
4765
4766         if (!i915_powersave)
4767                 return;
4768
4769         mutex_lock(&dev->struct_mutex);
4770
4771         i915_update_gfx_val(dev_priv);
4772
4773         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
4774                 /* Skip inactive CRTCs */
4775                 if (!crtc->fb)
4776                         continue;
4777
4778                 enabled++;
4779                 intel_crtc = to_intel_crtc(crtc);
4780                 if (!intel_crtc->busy)
4781                         intel_decrease_pllclock(crtc);
4782         }
4783
4784         if ((enabled == 1) && (IS_I945G(dev) || IS_I945GM(dev))) {
4785                 DRM_DEBUG_DRIVER("enable memory self refresh on 945\n");
4786                 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
4787         }
4788
4789         mutex_unlock(&dev->struct_mutex);
4790 }
4791
4792 /**
4793  * intel_mark_busy - mark the GPU and possibly the display busy
4794  * @dev: drm device
4795  * @obj: object we're operating on
4796  *
4797  * Callers can use this function to indicate that the GPU is busy processing
4798  * commands.  If @obj matches one of the CRTC objects (i.e. it's a scanout
4799  * buffer), we'll also mark the display as busy, so we know to increase its
4800  * clock frequency.
4801  */
4802 void intel_mark_busy(struct drm_device *dev, struct drm_gem_object *obj)
4803 {
4804         drm_i915_private_t *dev_priv = dev->dev_private;
4805         struct drm_crtc *crtc = NULL;
4806         struct intel_framebuffer *intel_fb;
4807         struct intel_crtc *intel_crtc;
4808
4809         if (!drm_core_check_feature(dev, DRIVER_MODESET))
4810                 return;
4811
4812         if (!dev_priv->busy) {
4813                 if (IS_I945G(dev) || IS_I945GM(dev)) {
4814                         u32 fw_blc_self;
4815
4816                         DRM_DEBUG_DRIVER("disable memory self refresh on 945\n");
4817                         fw_blc_self = I915_READ(FW_BLC_SELF);
4818                         fw_blc_self &= ~FW_BLC_SELF_EN;
4819                         I915_WRITE(FW_BLC_SELF, fw_blc_self | FW_BLC_SELF_EN_MASK);
4820                 }
4821                 dev_priv->busy = true;
4822         } else
4823                 mod_timer(&dev_priv->idle_timer, jiffies +
4824                           msecs_to_jiffies(GPU_IDLE_TIMEOUT));
4825
4826         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
4827                 if (!crtc->fb)
4828                         continue;
4829
4830                 intel_crtc = to_intel_crtc(crtc);
4831                 intel_fb = to_intel_framebuffer(crtc->fb);
4832                 if (intel_fb->obj == obj) {
4833                         if (!intel_crtc->busy) {
4834                                 if (IS_I945G(dev) || IS_I945GM(dev)) {
4835                                         u32 fw_blc_self;
4836
4837                                         DRM_DEBUG_DRIVER("disable memory self refresh on 945\n");
4838                                         fw_blc_self = I915_READ(FW_BLC_SELF);
4839                                         fw_blc_self &= ~FW_BLC_SELF_EN;
4840                                         I915_WRITE(FW_BLC_SELF, fw_blc_self | FW_BLC_SELF_EN_MASK);
4841                                 }
4842                                 /* Non-busy -> busy, upclock */
4843                                 intel_increase_pllclock(crtc, true);
4844                                 intel_crtc->busy = true;
4845                         } else {
4846                                 /* Busy -> busy, put off timer */
4847                                 mod_timer(&intel_crtc->idle_timer, jiffies +
4848                                           msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
4849                         }
4850                 }
4851         }
4852 }
4853
4854 static void intel_crtc_destroy(struct drm_crtc *crtc)
4855 {
4856         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4857
4858         drm_crtc_cleanup(crtc);
4859         kfree(intel_crtc);
4860 }
4861
4862 static void intel_unpin_work_fn(struct work_struct *__work)
4863 {
4864         struct intel_unpin_work *work =
4865                 container_of(__work, struct intel_unpin_work, work);
4866
4867         mutex_lock(&work->dev->struct_mutex);
4868         i915_gem_object_unpin(work->old_fb_obj);
4869         drm_gem_object_unreference(work->pending_flip_obj);
4870         drm_gem_object_unreference(work->old_fb_obj);
4871         mutex_unlock(&work->dev->struct_mutex);
4872         kfree(work);
4873 }
4874
4875 static void do_intel_finish_page_flip(struct drm_device *dev,
4876                                       struct drm_crtc *crtc)
4877 {
4878         drm_i915_private_t *dev_priv = dev->dev_private;
4879         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4880         struct intel_unpin_work *work;
4881         struct drm_i915_gem_object *obj_priv;
4882         struct drm_pending_vblank_event *e;
4883         struct timeval now;
4884         unsigned long flags;
4885
4886         /* Ignore early vblank irqs */
4887         if (intel_crtc == NULL)
4888                 return;
4889
4890         spin_lock_irqsave(&dev->event_lock, flags);
4891         work = intel_crtc->unpin_work;
4892         if (work == NULL || !work->pending) {
4893                 spin_unlock_irqrestore(&dev->event_lock, flags);
4894                 return;
4895         }
4896
4897         intel_crtc->unpin_work = NULL;
4898         drm_vblank_put(dev, intel_crtc->pipe);
4899
4900         if (work->event) {
4901                 e = work->event;
4902                 do_gettimeofday(&now);
4903                 e->event.sequence = drm_vblank_count(dev, intel_crtc->pipe);
4904                 e->event.tv_sec = now.tv_sec;
4905                 e->event.tv_usec = now.tv_usec;
4906                 list_add_tail(&e->base.link,
4907                               &e->base.file_priv->event_list);
4908                 wake_up_interruptible(&e->base.file_priv->event_wait);
4909         }
4910
4911         spin_unlock_irqrestore(&dev->event_lock, flags);
4912
4913         obj_priv = to_intel_bo(work->pending_flip_obj);
4914
4915         /* Initial scanout buffer will have a 0 pending flip count */
4916         if ((atomic_read(&obj_priv->pending_flip) == 0) ||
4917             atomic_dec_and_test(&obj_priv->pending_flip))
4918                 DRM_WAKEUP(&dev_priv->pending_flip_queue);
4919         schedule_work(&work->work);
4920
4921         trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
4922 }
4923
4924 void intel_finish_page_flip(struct drm_device *dev, int pipe)
4925 {
4926         drm_i915_private_t *dev_priv = dev->dev_private;
4927         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
4928
4929         do_intel_finish_page_flip(dev, crtc);
4930 }
4931
4932 void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
4933 {
4934         drm_i915_private_t *dev_priv = dev->dev_private;
4935         struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
4936
4937         do_intel_finish_page_flip(dev, crtc);
4938 }
4939
4940 void intel_prepare_page_flip(struct drm_device *dev, int plane)
4941 {
4942         drm_i915_private_t *dev_priv = dev->dev_private;
4943         struct intel_crtc *intel_crtc =
4944                 to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
4945         unsigned long flags;
4946
4947         spin_lock_irqsave(&dev->event_lock, flags);
4948         if (intel_crtc->unpin_work) {
4949                 if ((++intel_crtc->unpin_work->pending) > 1)
4950                         DRM_ERROR("Prepared flip multiple times\n");
4951         } else {
4952                 DRM_DEBUG_DRIVER("preparing flip with no unpin work?\n");
4953         }
4954         spin_unlock_irqrestore(&dev->event_lock, flags);
4955 }
4956
4957 static int intel_crtc_page_flip(struct drm_crtc *crtc,
4958                                 struct drm_framebuffer *fb,
4959                                 struct drm_pending_vblank_event *event)
4960 {
4961         struct drm_device *dev = crtc->dev;
4962         struct drm_i915_private *dev_priv = dev->dev_private;
4963         struct intel_framebuffer *intel_fb;
4964         struct drm_i915_gem_object *obj_priv;
4965         struct drm_gem_object *obj;
4966         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4967         struct intel_unpin_work *work;
4968         unsigned long flags, offset;
4969         int pipe = intel_crtc->pipe;
4970         u32 pf, pipesrc;
4971         int ret;
4972
4973         work = kzalloc(sizeof *work, GFP_KERNEL);
4974         if (work == NULL)
4975                 return -ENOMEM;
4976
4977         work->event = event;
4978         work->dev = crtc->dev;
4979         intel_fb = to_intel_framebuffer(crtc->fb);
4980         work->old_fb_obj = intel_fb->obj;
4981         INIT_WORK(&work->work, intel_unpin_work_fn);
4982
4983         /* We borrow the event spin lock for protecting unpin_work */
4984         spin_lock_irqsave(&dev->event_lock, flags);
4985         if (intel_crtc->unpin_work) {
4986                 spin_unlock_irqrestore(&dev->event_lock, flags);
4987                 kfree(work);
4988
4989                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
4990                 return -EBUSY;
4991         }
4992         intel_crtc->unpin_work = work;
4993         spin_unlock_irqrestore(&dev->event_lock, flags);
4994
4995         intel_fb = to_intel_framebuffer(fb);
4996         obj = intel_fb->obj;
4997
4998         mutex_lock(&dev->struct_mutex);
4999         ret = intel_pin_and_fence_fb_obj(dev, obj);
5000         if (ret)
5001                 goto cleanup_work;
5002
5003         /* Reference the objects for the scheduled work. */
5004         drm_gem_object_reference(work->old_fb_obj);
5005         drm_gem_object_reference(obj);
5006
5007         crtc->fb = fb;
5008         ret = i915_gem_object_flush_write_domain(obj);
5009         if (ret)
5010                 goto cleanup_objs;
5011
5012         ret = drm_vblank_get(dev, intel_crtc->pipe);
5013         if (ret)
5014                 goto cleanup_objs;
5015
5016         obj_priv = to_intel_bo(obj);
5017         atomic_inc(&obj_priv->pending_flip);
5018         work->pending_flip_obj = obj;
5019
5020         if (IS_GEN3(dev) || IS_GEN2(dev)) {
5021                 u32 flip_mask;
5022
5023                 if (intel_crtc->plane)
5024                         flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
5025                 else
5026                         flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
5027
5028                 BEGIN_LP_RING(2);
5029                 OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
5030                 OUT_RING(0);
5031                 ADVANCE_LP_RING();
5032         }
5033
5034         work->enable_stall_check = true;
5035
5036         /* Offset into the new buffer for cases of shared fbs between CRTCs */
5037         offset = crtc->y * fb->pitch + crtc->x * fb->bits_per_pixel/8;
5038
5039         BEGIN_LP_RING(4);
5040         switch(INTEL_INFO(dev)->gen) {
5041         case 2:
5042                 OUT_RING(MI_DISPLAY_FLIP |
5043                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5044                 OUT_RING(fb->pitch);
5045                 OUT_RING(obj_priv->gtt_offset + offset);
5046                 OUT_RING(MI_NOOP);
5047                 break;
5048
5049         case 3:
5050                 OUT_RING(MI_DISPLAY_FLIP_I915 |
5051                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5052                 OUT_RING(fb->pitch);
5053                 OUT_RING(obj_priv->gtt_offset + offset);
5054                 OUT_RING(MI_NOOP);
5055                 break;
5056
5057         case 4:
5058         case 5:
5059                 /* i965+ uses the linear or tiled offsets from the
5060                  * Display Registers (which do not change across a page-flip)
5061                  * so we need only reprogram the base address.
5062                  */
5063                 OUT_RING(MI_DISPLAY_FLIP |
5064                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5065                 OUT_RING(fb->pitch);
5066                 OUT_RING(obj_priv->gtt_offset | obj_priv->tiling_mode);
5067
5068                 /* XXX Enabling the panel-fitter across page-flip is so far
5069                  * untested on non-native modes, so ignore it for now.
5070                  * pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
5071                  */
5072                 pf = 0;
5073                 pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
5074                 OUT_RING(pf | pipesrc);
5075                 break;
5076
5077         case 6:
5078                 OUT_RING(MI_DISPLAY_FLIP |
5079                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5080                 OUT_RING(fb->pitch | obj_priv->tiling_mode);
5081                 OUT_RING(obj_priv->gtt_offset);
5082
5083                 pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
5084                 pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
5085                 OUT_RING(pf | pipesrc);
5086                 break;
5087         }
5088         ADVANCE_LP_RING();
5089
5090         mutex_unlock(&dev->struct_mutex);
5091
5092         trace_i915_flip_request(intel_crtc->plane, obj);
5093
5094         return 0;
5095
5096 cleanup_objs:
5097         drm_gem_object_unreference(work->old_fb_obj);
5098         drm_gem_object_unreference(obj);
5099 cleanup_work:
5100         mutex_unlock(&dev->struct_mutex);
5101
5102         spin_lock_irqsave(&dev->event_lock, flags);
5103         intel_crtc->unpin_work = NULL;
5104         spin_unlock_irqrestore(&dev->event_lock, flags);
5105
5106         kfree(work);
5107
5108         return ret;
5109 }
5110
5111 static const struct drm_crtc_helper_funcs intel_helper_funcs = {
5112         .dpms = intel_crtc_dpms,
5113         .mode_fixup = intel_crtc_mode_fixup,
5114         .mode_set = intel_crtc_mode_set,
5115         .mode_set_base = intel_pipe_set_base,
5116         .mode_set_base_atomic = intel_pipe_set_base_atomic,
5117         .prepare = intel_crtc_prepare,
5118         .commit = intel_crtc_commit,
5119         .load_lut = intel_crtc_load_lut,
5120 };
5121
5122 static const struct drm_crtc_funcs intel_crtc_funcs = {
5123         .cursor_set = intel_crtc_cursor_set,
5124         .cursor_move = intel_crtc_cursor_move,
5125         .gamma_set = intel_crtc_gamma_set,
5126         .set_config = drm_crtc_helper_set_config,
5127         .destroy = intel_crtc_destroy,
5128         .page_flip = intel_crtc_page_flip,
5129 };
5130
5131
5132 static void intel_crtc_init(struct drm_device *dev, int pipe)
5133 {
5134         drm_i915_private_t *dev_priv = dev->dev_private;
5135         struct intel_crtc *intel_crtc;
5136         int i;
5137
5138         intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
5139         if (intel_crtc == NULL)
5140                 return;
5141
5142         drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
5143
5144         drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
5145         intel_crtc->pipe = pipe;
5146         intel_crtc->plane = pipe;
5147         for (i = 0; i < 256; i++) {
5148                 intel_crtc->lut_r[i] = i;
5149                 intel_crtc->lut_g[i] = i;
5150                 intel_crtc->lut_b[i] = i;
5151         }
5152
5153         /* Swap pipes & planes for FBC on pre-965 */
5154         intel_crtc->pipe = pipe;
5155         intel_crtc->plane = pipe;
5156         if (IS_MOBILE(dev) && (IS_I9XX(dev) && !IS_I965G(dev))) {
5157                 DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
5158                 intel_crtc->plane = ((pipe == 0) ? 1 : 0);
5159         }
5160
5161         BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
5162                dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
5163         dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
5164         dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
5165
5166         intel_crtc->cursor_addr = 0;
5167         intel_crtc->dpms_mode = DRM_MODE_DPMS_OFF;
5168         drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
5169
5170         intel_crtc->busy = false;
5171
5172         setup_timer(&intel_crtc->idle_timer, intel_crtc_idle_timer,
5173                     (unsigned long)intel_crtc);
5174 }
5175
5176 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
5177                                 struct drm_file *file_priv)
5178 {
5179         drm_i915_private_t *dev_priv = dev->dev_private;
5180         struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
5181         struct drm_mode_object *drmmode_obj;
5182         struct intel_crtc *crtc;
5183
5184         if (!dev_priv) {
5185                 DRM_ERROR("called with no initialization\n");
5186                 return -EINVAL;
5187         }
5188
5189         drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
5190                         DRM_MODE_OBJECT_CRTC);
5191
5192         if (!drmmode_obj) {
5193                 DRM_ERROR("no such CRTC id\n");
5194                 return -EINVAL;
5195         }
5196
5197         crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
5198         pipe_from_crtc_id->pipe = crtc->pipe;
5199
5200         return 0;
5201 }
5202
5203 struct drm_crtc *intel_get_crtc_from_pipe(struct drm_device *dev, int pipe)
5204 {
5205         struct drm_crtc *crtc = NULL;
5206
5207         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
5208                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5209                 if (intel_crtc->pipe == pipe)
5210                         break;
5211         }
5212         return crtc;
5213 }
5214
5215 static int intel_encoder_clones(struct drm_device *dev, int type_mask)
5216 {
5217         int index_mask = 0;
5218         struct drm_encoder *encoder;
5219         int entry = 0;
5220
5221         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
5222                 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
5223                 if (type_mask & intel_encoder->clone_mask)
5224                         index_mask |= (1 << entry);
5225                 entry++;
5226         }
5227         return index_mask;
5228 }
5229
5230
5231 static void intel_setup_outputs(struct drm_device *dev)
5232 {
5233         struct drm_i915_private *dev_priv = dev->dev_private;
5234         struct drm_encoder *encoder;
5235         bool dpd_is_edp = false;
5236
5237         if (IS_MOBILE(dev) && !IS_I830(dev))
5238                 intel_lvds_init(dev);
5239
5240         if (HAS_PCH_SPLIT(dev)) {
5241                 dpd_is_edp = intel_dpd_is_edp(dev);
5242
5243                 if (IS_MOBILE(dev) && (I915_READ(DP_A) & DP_DETECTED))
5244                         intel_dp_init(dev, DP_A);
5245
5246                 if (dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
5247                         intel_dp_init(dev, PCH_DP_D);
5248         }
5249
5250         intel_crt_init(dev);
5251
5252         if (HAS_PCH_SPLIT(dev)) {
5253                 int found;
5254
5255                 if (I915_READ(HDMIB) & PORT_DETECTED) {
5256                         /* PCH SDVOB multiplex with HDMIB */
5257                         found = intel_sdvo_init(dev, PCH_SDVOB);
5258                         if (!found)
5259                                 intel_hdmi_init(dev, HDMIB);
5260                         if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
5261                                 intel_dp_init(dev, PCH_DP_B);
5262                 }
5263
5264                 if (I915_READ(HDMIC) & PORT_DETECTED)
5265                         intel_hdmi_init(dev, HDMIC);
5266
5267                 if (I915_READ(HDMID) & PORT_DETECTED)
5268                         intel_hdmi_init(dev, HDMID);
5269
5270                 if (I915_READ(PCH_DP_C) & DP_DETECTED)
5271                         intel_dp_init(dev, PCH_DP_C);
5272
5273                 if (!dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
5274                         intel_dp_init(dev, PCH_DP_D);
5275
5276         } else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
5277                 bool found = false;
5278
5279                 if (I915_READ(SDVOB) & SDVO_DETECTED) {
5280                         DRM_DEBUG_KMS("probing SDVOB\n");
5281                         found = intel_sdvo_init(dev, SDVOB);
5282                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
5283                                 DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
5284                                 intel_hdmi_init(dev, SDVOB);
5285                         }
5286
5287                         if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
5288                                 DRM_DEBUG_KMS("probing DP_B\n");
5289                                 intel_dp_init(dev, DP_B);
5290                         }
5291                 }
5292
5293                 /* Before G4X SDVOC doesn't have its own detect register */
5294
5295                 if (I915_READ(SDVOB) & SDVO_DETECTED) {
5296                         DRM_DEBUG_KMS("probing SDVOC\n");
5297                         found = intel_sdvo_init(dev, SDVOC);
5298                 }
5299
5300                 if (!found && (I915_READ(SDVOC) & SDVO_DETECTED)) {
5301
5302                         if (SUPPORTS_INTEGRATED_HDMI(dev)) {
5303                                 DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
5304                                 intel_hdmi_init(dev, SDVOC);
5305                         }
5306                         if (SUPPORTS_INTEGRATED_DP(dev)) {
5307                                 DRM_DEBUG_KMS("probing DP_C\n");
5308                                 intel_dp_init(dev, DP_C);
5309                         }
5310                 }
5311
5312                 if (SUPPORTS_INTEGRATED_DP(dev) &&
5313                     (I915_READ(DP_D) & DP_DETECTED)) {
5314                         DRM_DEBUG_KMS("probing DP_D\n");
5315                         intel_dp_init(dev, DP_D);
5316                 }
5317         } else if (IS_GEN2(dev))
5318                 intel_dvo_init(dev);
5319
5320         if (SUPPORTS_TV(dev))
5321                 intel_tv_init(dev);
5322
5323         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
5324                 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
5325
5326                 encoder->possible_crtcs = intel_encoder->crtc_mask;
5327                 encoder->possible_clones = intel_encoder_clones(dev,
5328                                                 intel_encoder->clone_mask);
5329         }
5330 }
5331
5332 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
5333 {
5334         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
5335
5336         drm_framebuffer_cleanup(fb);
5337         drm_gem_object_unreference_unlocked(intel_fb->obj);
5338
5339         kfree(intel_fb);
5340 }
5341
5342 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
5343                                                 struct drm_file *file_priv,
5344                                                 unsigned int *handle)
5345 {
5346         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
5347         struct drm_gem_object *object = intel_fb->obj;
5348
5349         return drm_gem_handle_create(file_priv, object, handle);
5350 }
5351
5352 static const struct drm_framebuffer_funcs intel_fb_funcs = {
5353         .destroy = intel_user_framebuffer_destroy,
5354         .create_handle = intel_user_framebuffer_create_handle,
5355 };
5356
5357 int intel_framebuffer_init(struct drm_device *dev,
5358                            struct intel_framebuffer *intel_fb,
5359                            struct drm_mode_fb_cmd *mode_cmd,
5360                            struct drm_gem_object *obj)
5361 {
5362         int ret;
5363
5364         ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
5365         if (ret) {
5366                 DRM_ERROR("framebuffer init failed %d\n", ret);
5367                 return ret;
5368         }
5369
5370         drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
5371         intel_fb->obj = obj;
5372         return 0;
5373 }
5374
5375 static struct drm_framebuffer *
5376 intel_user_framebuffer_create(struct drm_device *dev,
5377                               struct drm_file *filp,
5378                               struct drm_mode_fb_cmd *mode_cmd)
5379 {
5380         struct drm_gem_object *obj;
5381         struct intel_framebuffer *intel_fb;
5382         int ret;
5383
5384         obj = drm_gem_object_lookup(dev, filp, mode_cmd->handle);
5385         if (!obj)
5386                 return ERR_PTR(-ENOENT);
5387
5388         intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
5389         if (!intel_fb)
5390                 return ERR_PTR(-ENOMEM);
5391
5392         ret = intel_framebuffer_init(dev, intel_fb,
5393                                      mode_cmd, obj);
5394         if (ret) {
5395                 drm_gem_object_unreference_unlocked(obj);
5396                 kfree(intel_fb);
5397                 return ERR_PTR(ret);
5398         }
5399
5400         return &intel_fb->base;
5401 }
5402
5403 static const struct drm_mode_config_funcs intel_mode_funcs = {
5404         .fb_create = intel_user_framebuffer_create,
5405         .output_poll_changed = intel_fb_output_poll_changed,
5406 };
5407
5408 static struct drm_gem_object *
5409 intel_alloc_context_page(struct drm_device *dev)
5410 {
5411         struct drm_gem_object *ctx;
5412         int ret;
5413
5414         ctx = i915_gem_alloc_object(dev, 4096);
5415         if (!ctx) {
5416                 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
5417                 return NULL;
5418         }
5419
5420         mutex_lock(&dev->struct_mutex);
5421         ret = i915_gem_object_pin(ctx, 4096);
5422         if (ret) {
5423                 DRM_ERROR("failed to pin power context: %d\n", ret);
5424                 goto err_unref;
5425         }
5426
5427         ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
5428         if (ret) {
5429                 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
5430                 goto err_unpin;
5431         }
5432         mutex_unlock(&dev->struct_mutex);
5433
5434         return ctx;
5435
5436 err_unpin:
5437         i915_gem_object_unpin(ctx);
5438 err_unref:
5439         drm_gem_object_unreference(ctx);
5440         mutex_unlock(&dev->struct_mutex);
5441         return NULL;
5442 }
5443
5444 bool ironlake_set_drps(struct drm_device *dev, u8 val)
5445 {
5446         struct drm_i915_private *dev_priv = dev->dev_private;
5447         u16 rgvswctl;
5448
5449         rgvswctl = I915_READ16(MEMSWCTL);
5450         if (rgvswctl & MEMCTL_CMD_STS) {
5451                 DRM_DEBUG("gpu busy, RCS change rejected\n");
5452                 return false; /* still busy with another command */
5453         }
5454
5455         rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
5456                 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
5457         I915_WRITE16(MEMSWCTL, rgvswctl);
5458         POSTING_READ16(MEMSWCTL);
5459
5460         rgvswctl |= MEMCTL_CMD_STS;
5461         I915_WRITE16(MEMSWCTL, rgvswctl);
5462
5463         return true;
5464 }
5465
5466 void ironlake_enable_drps(struct drm_device *dev)
5467 {
5468         struct drm_i915_private *dev_priv = dev->dev_private;
5469         u32 rgvmodectl = I915_READ(MEMMODECTL);
5470         u8 fmax, fmin, fstart, vstart;
5471
5472         /* 100ms RC evaluation intervals */
5473         I915_WRITE(RCUPEI, 100000);
5474         I915_WRITE(RCDNEI, 100000);
5475
5476         /* Set max/min thresholds to 90ms and 80ms respectively */
5477         I915_WRITE(RCBMAXAVG, 90000);
5478         I915_WRITE(RCBMINAVG, 80000);
5479
5480         I915_WRITE(MEMIHYST, 1);
5481
5482         /* Set up min, max, and cur for interrupt handling */
5483         fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
5484         fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
5485         fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
5486                 MEMMODE_FSTART_SHIFT;
5487         fstart = fmax;
5488
5489         vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
5490                 PXVFREQ_PX_SHIFT;
5491
5492         dev_priv->fmax = fstart; /* IPS callback will increase this */
5493         dev_priv->fstart = fstart;
5494
5495         dev_priv->max_delay = fmax;
5496         dev_priv->min_delay = fmin;
5497         dev_priv->cur_delay = fstart;
5498
5499         DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n", fmax, fmin,
5500                          fstart);
5501
5502         I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
5503
5504         /*
5505          * Interrupts will be enabled in ironlake_irq_postinstall
5506          */
5507
5508         I915_WRITE(VIDSTART, vstart);
5509         POSTING_READ(VIDSTART);
5510
5511         rgvmodectl |= MEMMODE_SWMODE_EN;
5512         I915_WRITE(MEMMODECTL, rgvmodectl);
5513
5514         if (wait_for((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 1, 0))
5515                 DRM_ERROR("stuck trying to change perf mode\n");
5516         msleep(1);
5517
5518         ironlake_set_drps(dev, fstart);
5519
5520         dev_priv->last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
5521                 I915_READ(0x112e0);
5522         dev_priv->last_time1 = jiffies_to_msecs(jiffies);
5523         dev_priv->last_count2 = I915_READ(0x112f4);
5524         getrawmonotonic(&dev_priv->last_time2);
5525 }
5526
5527 void ironlake_disable_drps(struct drm_device *dev)
5528 {
5529         struct drm_i915_private *dev_priv = dev->dev_private;
5530         u16 rgvswctl = I915_READ16(MEMSWCTL);
5531
5532         /* Ack interrupts, disable EFC interrupt */
5533         I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
5534         I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
5535         I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
5536         I915_WRITE(DEIIR, DE_PCU_EVENT);
5537         I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
5538
5539         /* Go back to the starting frequency */
5540         ironlake_set_drps(dev, dev_priv->fstart);
5541         msleep(1);
5542         rgvswctl |= MEMCTL_CMD_STS;
5543         I915_WRITE(MEMSWCTL, rgvswctl);
5544         msleep(1);
5545
5546 }
5547
5548 static unsigned long intel_pxfreq(u32 vidfreq)
5549 {
5550         unsigned long freq;
5551         int div = (vidfreq & 0x3f0000) >> 16;
5552         int post = (vidfreq & 0x3000) >> 12;
5553         int pre = (vidfreq & 0x7);
5554
5555         if (!pre)
5556                 return 0;
5557
5558         freq = ((div * 133333) / ((1<<post) * pre));
5559
5560         return freq;
5561 }
5562
5563 void intel_init_emon(struct drm_device *dev)
5564 {
5565         struct drm_i915_private *dev_priv = dev->dev_private;
5566         u32 lcfuse;
5567         u8 pxw[16];
5568         int i;
5569
5570         /* Disable to program */
5571         I915_WRITE(ECR, 0);
5572         POSTING_READ(ECR);
5573
5574         /* Program energy weights for various events */
5575         I915_WRITE(SDEW, 0x15040d00);
5576         I915_WRITE(CSIEW0, 0x007f0000);
5577         I915_WRITE(CSIEW1, 0x1e220004);
5578         I915_WRITE(CSIEW2, 0x04000004);
5579
5580         for (i = 0; i < 5; i++)
5581                 I915_WRITE(PEW + (i * 4), 0);
5582         for (i = 0; i < 3; i++)
5583                 I915_WRITE(DEW + (i * 4), 0);
5584
5585         /* Program P-state weights to account for frequency power adjustment */
5586         for (i = 0; i < 16; i++) {
5587                 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
5588                 unsigned long freq = intel_pxfreq(pxvidfreq);
5589                 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
5590                         PXVFREQ_PX_SHIFT;
5591                 unsigned long val;
5592
5593                 val = vid * vid;
5594                 val *= (freq / 1000);
5595                 val *= 255;
5596                 val /= (127*127*900);
5597                 if (val > 0xff)
5598                         DRM_ERROR("bad pxval: %ld\n", val);
5599                 pxw[i] = val;
5600         }
5601         /* Render standby states get 0 weight */
5602         pxw[14] = 0;
5603         pxw[15] = 0;
5604
5605         for (i = 0; i < 4; i++) {
5606                 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
5607                         (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
5608                 I915_WRITE(PXW + (i * 4), val);
5609         }
5610
5611         /* Adjust magic regs to magic values (more experimental results) */
5612         I915_WRITE(OGW0, 0);
5613         I915_WRITE(OGW1, 0);
5614         I915_WRITE(EG0, 0x00007f00);
5615         I915_WRITE(EG1, 0x0000000e);
5616         I915_WRITE(EG2, 0x000e0000);
5617         I915_WRITE(EG3, 0x68000300);
5618         I915_WRITE(EG4, 0x42000000);
5619         I915_WRITE(EG5, 0x00140031);
5620         I915_WRITE(EG6, 0);
5621         I915_WRITE(EG7, 0);
5622
5623         for (i = 0; i < 8; i++)
5624                 I915_WRITE(PXWL + (i * 4), 0);
5625
5626         /* Enable PMON + select events */
5627         I915_WRITE(ECR, 0x80000019);
5628
5629         lcfuse = I915_READ(LCFUSE02);
5630
5631         dev_priv->corr = (lcfuse & LCFUSE_HIV_MASK);
5632 }
5633
5634 void intel_init_clock_gating(struct drm_device *dev)
5635 {
5636         struct drm_i915_private *dev_priv = dev->dev_private;
5637
5638         /*
5639          * Disable clock gating reported to work incorrectly according to the
5640          * specs, but enable as much else as we can.
5641          */
5642         if (HAS_PCH_SPLIT(dev)) {
5643                 uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE;
5644
5645                 if (IS_IRONLAKE(dev)) {
5646                         /* Required for FBC */
5647                         dspclk_gate |= DPFDUNIT_CLOCK_GATE_DISABLE;
5648                         /* Required for CxSR */
5649                         dspclk_gate |= DPARBUNIT_CLOCK_GATE_DISABLE;
5650
5651                         I915_WRITE(PCH_3DCGDIS0,
5652                                    MARIUNIT_CLOCK_GATE_DISABLE |
5653                                    SVSMUNIT_CLOCK_GATE_DISABLE);
5654                 }
5655
5656                 I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate);
5657
5658                 /*
5659                  * According to the spec the following bits should be set in
5660                  * order to enable memory self-refresh
5661                  * The bit 22/21 of 0x42004
5662                  * The bit 5 of 0x42020
5663                  * The bit 15 of 0x45000
5664                  */
5665                 if (IS_IRONLAKE(dev)) {
5666                         I915_WRITE(ILK_DISPLAY_CHICKEN2,
5667                                         (I915_READ(ILK_DISPLAY_CHICKEN2) |
5668                                         ILK_DPARB_GATE | ILK_VSDPFD_FULL));
5669                         I915_WRITE(ILK_DSPCLK_GATE,
5670                                         (I915_READ(ILK_DSPCLK_GATE) |
5671                                                 ILK_DPARB_CLK_GATE));
5672                         I915_WRITE(DISP_ARB_CTL,
5673                                         (I915_READ(DISP_ARB_CTL) |
5674                                                 DISP_FBC_WM_DIS));
5675                 }
5676                 /*
5677                  * Based on the document from hardware guys the following bits
5678                  * should be set unconditionally in order to enable FBC.
5679                  * The bit 22 of 0x42000
5680                  * The bit 22 of 0x42004
5681                  * The bit 7,8,9 of 0x42020.
5682                  */
5683                 if (IS_IRONLAKE_M(dev)) {
5684                         I915_WRITE(ILK_DISPLAY_CHICKEN1,
5685                                    I915_READ(ILK_DISPLAY_CHICKEN1) |
5686                                    ILK_FBCQ_DIS);
5687                         I915_WRITE(ILK_DISPLAY_CHICKEN2,
5688                                    I915_READ(ILK_DISPLAY_CHICKEN2) |
5689                                    ILK_DPARB_GATE);
5690                         I915_WRITE(ILK_DSPCLK_GATE,
5691                                    I915_READ(ILK_DSPCLK_GATE) |
5692                                    ILK_DPFC_DIS1 |
5693                                    ILK_DPFC_DIS2 |
5694                                    ILK_CLK_FBC);
5695                 }
5696                 if (IS_GEN6(dev))
5697                         return;
5698         } else if (IS_G4X(dev)) {
5699                 uint32_t dspclk_gate;
5700                 I915_WRITE(RENCLK_GATE_D1, 0);
5701                 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
5702                        GS_UNIT_CLOCK_GATE_DISABLE |
5703                        CL_UNIT_CLOCK_GATE_DISABLE);
5704                 I915_WRITE(RAMCLK_GATE_D, 0);
5705                 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
5706                         OVRUNIT_CLOCK_GATE_DISABLE |
5707                         OVCUNIT_CLOCK_GATE_DISABLE;
5708                 if (IS_GM45(dev))
5709                         dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
5710                 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
5711         } else if (IS_I965GM(dev)) {
5712                 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
5713                 I915_WRITE(RENCLK_GATE_D2, 0);
5714                 I915_WRITE(DSPCLK_GATE_D, 0);
5715                 I915_WRITE(RAMCLK_GATE_D, 0);
5716                 I915_WRITE16(DEUC, 0);
5717         } else if (IS_I965G(dev)) {
5718                 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
5719                        I965_RCC_CLOCK_GATE_DISABLE |
5720                        I965_RCPB_CLOCK_GATE_DISABLE |
5721                        I965_ISC_CLOCK_GATE_DISABLE |
5722                        I965_FBC_CLOCK_GATE_DISABLE);
5723                 I915_WRITE(RENCLK_GATE_D2, 0);
5724         } else if (IS_I9XX(dev)) {
5725                 u32 dstate = I915_READ(D_STATE);
5726
5727                 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
5728                         DSTATE_DOT_CLOCK_GATING;
5729                 I915_WRITE(D_STATE, dstate);
5730         } else if (IS_I85X(dev) || IS_I865G(dev)) {
5731                 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
5732         } else if (IS_I830(dev)) {
5733                 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
5734         }
5735
5736         /*
5737          * GPU can automatically power down the render unit if given a page
5738          * to save state.
5739          */
5740         if (IS_IRONLAKE_M(dev)) {
5741                 if (dev_priv->renderctx == NULL)
5742                         dev_priv->renderctx = intel_alloc_context_page(dev);
5743                 if (dev_priv->renderctx) {
5744                         struct drm_i915_gem_object *obj_priv;
5745                         obj_priv = to_intel_bo(dev_priv->renderctx);
5746                         if (obj_priv) {
5747                                 BEGIN_LP_RING(4);
5748                                 OUT_RING(MI_SET_CONTEXT);
5749                                 OUT_RING(obj_priv->gtt_offset |
5750                                                 MI_MM_SPACE_GTT |
5751                                                 MI_SAVE_EXT_STATE_EN |
5752                                                 MI_RESTORE_EXT_STATE_EN |
5753                                                 MI_RESTORE_INHIBIT);
5754                                 OUT_RING(MI_NOOP);
5755                                 OUT_RING(MI_FLUSH);
5756                                 ADVANCE_LP_RING();
5757                         }
5758                 } else {
5759                         DRM_DEBUG_KMS("Failed to allocate render context."
5760                                       "Disable RC6\n");
5761                         return;
5762                 }
5763         }
5764
5765         if (I915_HAS_RC6(dev) && drm_core_check_feature(dev, DRIVER_MODESET)) {
5766                 struct drm_i915_gem_object *obj_priv = NULL;
5767
5768                 if (dev_priv->pwrctx) {
5769                         obj_priv = to_intel_bo(dev_priv->pwrctx);
5770                 } else {
5771                         struct drm_gem_object *pwrctx;
5772
5773                         pwrctx = intel_alloc_context_page(dev);
5774                         if (pwrctx) {
5775                                 dev_priv->pwrctx = pwrctx;
5776                                 obj_priv = to_intel_bo(pwrctx);
5777                         }
5778                 }
5779
5780                 if (obj_priv) {
5781                         I915_WRITE(PWRCTXA, obj_priv->gtt_offset | PWRCTX_EN);
5782                         I915_WRITE(MCHBAR_RENDER_STANDBY,
5783                                    I915_READ(MCHBAR_RENDER_STANDBY) & ~RCX_SW_EXIT);
5784                 }
5785         }
5786 }
5787
5788 /* Set up chip specific display functions */
5789 static void intel_init_display(struct drm_device *dev)
5790 {
5791         struct drm_i915_private *dev_priv = dev->dev_private;
5792
5793         /* We always want a DPMS function */
5794         if (HAS_PCH_SPLIT(dev))
5795                 dev_priv->display.dpms = ironlake_crtc_dpms;
5796         else
5797                 dev_priv->display.dpms = i9xx_crtc_dpms;
5798
5799         if (I915_HAS_FBC(dev)) {
5800                 if (IS_IRONLAKE_M(dev)) {
5801                         dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
5802                         dev_priv->display.enable_fbc = ironlake_enable_fbc;
5803                         dev_priv->display.disable_fbc = ironlake_disable_fbc;
5804                 } else if (IS_GM45(dev)) {
5805                         dev_priv->display.fbc_enabled = g4x_fbc_enabled;
5806                         dev_priv->display.enable_fbc = g4x_enable_fbc;
5807                         dev_priv->display.disable_fbc = g4x_disable_fbc;
5808                 } else if (IS_I965GM(dev)) {
5809                         dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
5810                         dev_priv->display.enable_fbc = i8xx_enable_fbc;
5811                         dev_priv->display.disable_fbc = i8xx_disable_fbc;
5812                 }
5813                 /* 855GM needs testing */
5814         }
5815
5816         /* Returns the core display clock speed */
5817         if (IS_I945G(dev) || (IS_G33(dev) && ! IS_PINEVIEW_M(dev)))
5818                 dev_priv->display.get_display_clock_speed =
5819                         i945_get_display_clock_speed;
5820         else if (IS_I915G(dev))
5821                 dev_priv->display.get_display_clock_speed =
5822                         i915_get_display_clock_speed;
5823         else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev))
5824                 dev_priv->display.get_display_clock_speed =
5825                         i9xx_misc_get_display_clock_speed;
5826         else if (IS_I915GM(dev))
5827                 dev_priv->display.get_display_clock_speed =
5828                         i915gm_get_display_clock_speed;
5829         else if (IS_I865G(dev))
5830                 dev_priv->display.get_display_clock_speed =
5831                         i865_get_display_clock_speed;
5832         else if (IS_I85X(dev))
5833                 dev_priv->display.get_display_clock_speed =
5834                         i855_get_display_clock_speed;
5835         else /* 852, 830 */
5836                 dev_priv->display.get_display_clock_speed =
5837                         i830_get_display_clock_speed;
5838
5839         /* For FIFO watermark updates */
5840         if (HAS_PCH_SPLIT(dev)) {
5841                 if (IS_IRONLAKE(dev)) {
5842                         if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK)
5843                                 dev_priv->display.update_wm = ironlake_update_wm;
5844                         else {
5845                                 DRM_DEBUG_KMS("Failed to get proper latency. "
5846                                               "Disable CxSR\n");
5847                                 dev_priv->display.update_wm = NULL;
5848                         }
5849                 } else
5850                         dev_priv->display.update_wm = NULL;
5851         } else if (IS_PINEVIEW(dev)) {
5852                 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
5853                                             dev_priv->is_ddr3,
5854                                             dev_priv->fsb_freq,
5855                                             dev_priv->mem_freq)) {
5856                         DRM_INFO("failed to find known CxSR latency "
5857                                  "(found ddr%s fsb freq %d, mem freq %d), "
5858                                  "disabling CxSR\n",
5859                                  (dev_priv->is_ddr3 == 1) ? "3": "2",
5860                                  dev_priv->fsb_freq, dev_priv->mem_freq);
5861                         /* Disable CxSR and never update its watermark again */
5862                         pineview_disable_cxsr(dev);
5863                         dev_priv->display.update_wm = NULL;
5864                 } else
5865                         dev_priv->display.update_wm = pineview_update_wm;
5866         } else if (IS_G4X(dev))
5867                 dev_priv->display.update_wm = g4x_update_wm;
5868         else if (IS_I965G(dev))
5869                 dev_priv->display.update_wm = i965_update_wm;
5870         else if (IS_I9XX(dev)) {
5871                 dev_priv->display.update_wm = i9xx_update_wm;
5872                 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
5873         } else if (IS_I85X(dev)) {
5874                 dev_priv->display.update_wm = i9xx_update_wm;
5875                 dev_priv->display.get_fifo_size = i85x_get_fifo_size;
5876         } else {
5877                 dev_priv->display.update_wm = i830_update_wm;
5878                 if (IS_845G(dev))
5879                         dev_priv->display.get_fifo_size = i845_get_fifo_size;
5880                 else
5881                         dev_priv->display.get_fifo_size = i830_get_fifo_size;
5882         }
5883 }
5884
5885 /*
5886  * Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
5887  * resume, or other times.  This quirk makes sure that's the case for
5888  * affected systems.
5889  */
5890 static void quirk_pipea_force (struct drm_device *dev)
5891 {
5892         struct drm_i915_private *dev_priv = dev->dev_private;
5893
5894         dev_priv->quirks |= QUIRK_PIPEA_FORCE;
5895         DRM_DEBUG_DRIVER("applying pipe a force quirk\n");
5896 }
5897
5898 struct intel_quirk {
5899         int device;
5900         int subsystem_vendor;
5901         int subsystem_device;
5902         void (*hook)(struct drm_device *dev);
5903 };
5904
5905 struct intel_quirk intel_quirks[] = {
5906         /* HP Compaq 2730p needs pipe A force quirk (LP: #291555) */
5907         { 0x2a42, 0x103c, 0x30eb, quirk_pipea_force },
5908         /* HP Mini needs pipe A force quirk (LP: #322104) */
5909         { 0x27ae,0x103c, 0x361a, quirk_pipea_force },
5910
5911         /* Thinkpad R31 needs pipe A force quirk */
5912         { 0x3577, 0x1014, 0x0505, quirk_pipea_force },
5913         /* Toshiba Protege R-205, S-209 needs pipe A force quirk */
5914         { 0x2592, 0x1179, 0x0001, quirk_pipea_force },
5915
5916         /* ThinkPad X30 needs pipe A force quirk (LP: #304614) */
5917         { 0x3577,  0x1014, 0x0513, quirk_pipea_force },
5918         /* ThinkPad X40 needs pipe A force quirk */
5919
5920         /* ThinkPad T60 needs pipe A force quirk (bug #16494) */
5921         { 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
5922
5923         /* 855 & before need to leave pipe A & dpll A up */
5924         { 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
5925         { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
5926 };
5927
5928 static void intel_init_quirks(struct drm_device *dev)
5929 {
5930         struct pci_dev *d = dev->pdev;
5931         int i;
5932
5933         for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
5934                 struct intel_quirk *q = &intel_quirks[i];
5935
5936                 if (d->device == q->device &&
5937                     (d->subsystem_vendor == q->subsystem_vendor ||
5938                      q->subsystem_vendor == PCI_ANY_ID) &&
5939                     (d->subsystem_device == q->subsystem_device ||
5940                      q->subsystem_device == PCI_ANY_ID))
5941                         q->hook(dev);
5942         }
5943 }
5944
5945 /* Disable the VGA plane that we never use */
5946 static void i915_disable_vga(struct drm_device *dev)
5947 {
5948         struct drm_i915_private *dev_priv = dev->dev_private;
5949         u8 sr1;
5950         u32 vga_reg;
5951
5952         if (HAS_PCH_SPLIT(dev))
5953                 vga_reg = CPU_VGACNTRL;
5954         else
5955                 vga_reg = VGACNTRL;
5956
5957         vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
5958         outb(1, VGA_SR_INDEX);
5959         sr1 = inb(VGA_SR_DATA);
5960         outb(sr1 | 1<<5, VGA_SR_DATA);
5961         vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
5962         udelay(300);
5963
5964         I915_WRITE(vga_reg, VGA_DISP_DISABLE);
5965         POSTING_READ(vga_reg);
5966 }
5967
5968 void intel_modeset_init(struct drm_device *dev)
5969 {
5970         struct drm_i915_private *dev_priv = dev->dev_private;
5971         int i;
5972
5973         drm_mode_config_init(dev);
5974
5975         dev->mode_config.min_width = 0;
5976         dev->mode_config.min_height = 0;
5977
5978         dev->mode_config.funcs = (void *)&intel_mode_funcs;
5979
5980         intel_init_quirks(dev);
5981
5982         intel_init_display(dev);
5983
5984         if (IS_I965G(dev)) {
5985                 dev->mode_config.max_width = 8192;
5986                 dev->mode_config.max_height = 8192;
5987         } else if (IS_I9XX(dev)) {
5988                 dev->mode_config.max_width = 4096;
5989                 dev->mode_config.max_height = 4096;
5990         } else {
5991                 dev->mode_config.max_width = 2048;
5992                 dev->mode_config.max_height = 2048;
5993         }
5994
5995         /* set memory base */
5996         if (IS_I9XX(dev))
5997                 dev->mode_config.fb_base = pci_resource_start(dev->pdev, 2);
5998         else
5999                 dev->mode_config.fb_base = pci_resource_start(dev->pdev, 0);
6000
6001         if (IS_MOBILE(dev) || IS_I9XX(dev))
6002                 dev_priv->num_pipe = 2;
6003         else
6004                 dev_priv->num_pipe = 1;
6005         DRM_DEBUG_KMS("%d display pipe%s available.\n",
6006                       dev_priv->num_pipe, dev_priv->num_pipe > 1 ? "s" : "");
6007
6008         for (i = 0; i < dev_priv->num_pipe; i++) {
6009                 intel_crtc_init(dev, i);
6010         }
6011
6012         intel_setup_outputs(dev);
6013
6014         intel_init_clock_gating(dev);
6015
6016         /* Just disable it once at startup */
6017         i915_disable_vga(dev);
6018
6019         if (IS_IRONLAKE_M(dev)) {
6020                 ironlake_enable_drps(dev);
6021                 intel_init_emon(dev);
6022         }
6023
6024         INIT_WORK(&dev_priv->idle_work, intel_idle_update);
6025         setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
6026                     (unsigned long)dev);
6027
6028         intel_setup_overlay(dev);
6029 }
6030
6031 void intel_modeset_cleanup(struct drm_device *dev)
6032 {
6033         struct drm_i915_private *dev_priv = dev->dev_private;
6034         struct drm_crtc *crtc;
6035         struct intel_crtc *intel_crtc;
6036
6037         mutex_lock(&dev->struct_mutex);
6038
6039         drm_kms_helper_poll_fini(dev);
6040         intel_fbdev_fini(dev);
6041
6042         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6043                 /* Skip inactive CRTCs */
6044                 if (!crtc->fb)
6045                         continue;
6046
6047                 intel_crtc = to_intel_crtc(crtc);
6048                 intel_increase_pllclock(crtc, false);
6049                 del_timer_sync(&intel_crtc->idle_timer);
6050         }
6051
6052         del_timer_sync(&dev_priv->idle_timer);
6053
6054         if (dev_priv->display.disable_fbc)
6055                 dev_priv->display.disable_fbc(dev);
6056
6057         if (dev_priv->renderctx) {
6058                 struct drm_i915_gem_object *obj_priv;
6059
6060                 obj_priv = to_intel_bo(dev_priv->renderctx);
6061                 I915_WRITE(CCID, obj_priv->gtt_offset &~ CCID_EN);
6062                 I915_READ(CCID);
6063                 i915_gem_object_unpin(dev_priv->renderctx);
6064                 drm_gem_object_unreference(dev_priv->renderctx);
6065         }
6066
6067         if (dev_priv->pwrctx) {
6068                 struct drm_i915_gem_object *obj_priv;
6069
6070                 obj_priv = to_intel_bo(dev_priv->pwrctx);
6071                 I915_WRITE(PWRCTXA, obj_priv->gtt_offset &~ PWRCTX_EN);
6072                 I915_READ(PWRCTXA);
6073                 i915_gem_object_unpin(dev_priv->pwrctx);
6074                 drm_gem_object_unreference(dev_priv->pwrctx);
6075         }
6076
6077         if (IS_IRONLAKE_M(dev))
6078                 ironlake_disable_drps(dev);
6079
6080         mutex_unlock(&dev->struct_mutex);
6081
6082         drm_mode_config_cleanup(dev);
6083 }
6084
6085
6086 /*
6087  * Return which encoder is currently attached for connector.
6088  */
6089 struct drm_encoder *intel_attached_encoder (struct drm_connector *connector)
6090 {
6091         struct drm_mode_object *obj;
6092         struct drm_encoder *encoder;
6093         int i;
6094
6095         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
6096                 if (connector->encoder_ids[i] == 0)
6097                         break;
6098
6099                 obj = drm_mode_object_find(connector->dev,
6100                                            connector->encoder_ids[i],
6101                                            DRM_MODE_OBJECT_ENCODER);
6102                 if (!obj)
6103                         continue;
6104
6105                 encoder = obj_to_encoder(obj);
6106                 return encoder;
6107         }
6108         return NULL;
6109 }
6110
6111 /*
6112  * set vga decode state - true == enable VGA decode
6113  */
6114 int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
6115 {
6116         struct drm_i915_private *dev_priv = dev->dev_private;
6117         u16 gmch_ctrl;
6118
6119         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &gmch_ctrl);
6120         if (state)
6121                 gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
6122         else
6123                 gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
6124         pci_write_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, gmch_ctrl);
6125         return 0;
6126 }