2 * Copyright © 2009 Intel Corporation
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 #include <linux/i2c.h>
19 #include <linux/pm_runtime.h>
22 #include "framebuffer.h"
24 #include "psb_intel_drv.h"
25 #include "psb_intel_reg.h"
26 #include "psb_intel_display.h"
29 struct psb_intel_range_t {
33 struct oaktrail_limit_t {
34 struct psb_intel_range_t dot, m, p1;
37 struct oaktrail_clock_t {
44 #define MRST_LIMIT_LVDS_100L 0
45 #define MRST_LIMIT_LVDS_83 1
46 #define MRST_LIMIT_LVDS_100 2
48 #define MRST_DOT_MIN 19750
49 #define MRST_DOT_MAX 120000
50 #define MRST_M_MIN_100L 20
51 #define MRST_M_MIN_100 10
52 #define MRST_M_MIN_83 12
53 #define MRST_M_MAX_100L 34
54 #define MRST_M_MAX_100 17
55 #define MRST_M_MAX_83 20
57 #define MRST_P1_MAX_0 7
58 #define MRST_P1_MAX_1 8
60 static const struct oaktrail_limit_t oaktrail_limits[] = {
61 { /* MRST_LIMIT_LVDS_100L */
62 .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
63 .m = {.min = MRST_M_MIN_100L, .max = MRST_M_MAX_100L},
64 .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
66 { /* MRST_LIMIT_LVDS_83L */
67 .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
68 .m = {.min = MRST_M_MIN_83, .max = MRST_M_MAX_83},
69 .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_0},
71 { /* MRST_LIMIT_LVDS_100 */
72 .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
73 .m = {.min = MRST_M_MIN_100, .max = MRST_M_MAX_100},
74 .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
79 static const u32 oaktrail_m_converts[] = {
80 0x2B, 0x15, 0x2A, 0x35, 0x1A, 0x0D, 0x26, 0x33, 0x19, 0x2C,
81 0x36, 0x3B, 0x1D, 0x2E, 0x37, 0x1B, 0x2D, 0x16, 0x0B, 0x25,
82 0x12, 0x09, 0x24, 0x32, 0x39, 0x1c,
85 static const struct oaktrail_limit_t *oaktrail_limit(struct drm_crtc *crtc)
87 const struct oaktrail_limit_t *limit = NULL;
88 struct drm_device *dev = crtc->dev;
89 struct drm_psb_private *dev_priv = dev->dev_private;
91 if (psb_intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)
92 || psb_intel_pipe_has_type(crtc, INTEL_OUTPUT_MIPI)) {
93 switch (dev_priv->core_freq) {
95 limit = &oaktrail_limits[MRST_LIMIT_LVDS_100L];
98 limit = &oaktrail_limits[MRST_LIMIT_LVDS_83];
101 limit = &oaktrail_limits[MRST_LIMIT_LVDS_100];
106 dev_err(dev->dev, "oaktrail_limit Wrong display type.\n");
112 /** Derive the pixel clock for the given refclk and divisors for 8xx chips. */
113 static void oaktrail_clock(int refclk, struct oaktrail_clock_t *clock)
115 clock->dot = (refclk * clock->m) / (14 * clock->p1);
118 static void mrstPrintPll(char *prefix, struct oaktrail_clock_t *clock)
120 pr_debug("%s: dotclock = %d, m = %d, p1 = %d.\n",
121 prefix, clock->dot, clock->m, clock->p1);
125 * Returns a set of divisors for the desired target clock with the given refclk,
126 * or FALSE. Divisor values are the actual divisors for
129 mrstFindBestPLL(struct drm_crtc *crtc, int target, int refclk,
130 struct oaktrail_clock_t *best_clock)
132 struct oaktrail_clock_t clock;
133 const struct oaktrail_limit_t *limit = oaktrail_limit(crtc);
136 memset(best_clock, 0, sizeof(*best_clock));
138 for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
139 for (clock.p1 = limit->p1.min; clock.p1 <= limit->p1.max;
143 oaktrail_clock(refclk, &clock);
145 this_err = abs(clock.dot - target);
146 if (this_err < err) {
152 dev_dbg(crtc->dev->dev, "mrstFindBestPLL err = %d.\n", err);
153 return err != target;
157 * Sets the power management mode of the pipe and plane.
159 * This code should probably grow support for turning the cursor off and back
160 * on appropriately at the same time as we're turning the pipe off/on.
162 static void oaktrail_crtc_dpms(struct drm_crtc *crtc, int mode)
164 struct drm_device *dev = crtc->dev;
165 struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(crtc);
166 int pipe = psb_intel_crtc->pipe;
167 int dpll_reg = (pipe == 0) ? MRST_DPLL_A : DPLL_B;
168 int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
169 int dspbase_reg = (pipe == 0) ? MRST_DSPABASE : DSPBBASE;
170 int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
173 if (!gma_power_begin(dev, true))
176 /* XXX: When our outputs are all unaware of DPMS modes other than off
177 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
180 case DRM_MODE_DPMS_ON:
181 case DRM_MODE_DPMS_STANDBY:
182 case DRM_MODE_DPMS_SUSPEND:
183 /* Enable the DPLL */
184 temp = REG_READ(dpll_reg);
185 if ((temp & DPLL_VCO_ENABLE) == 0) {
186 REG_WRITE(dpll_reg, temp);
188 /* Wait for the clocks to stabilize. */
190 REG_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
192 /* Wait for the clocks to stabilize. */
194 REG_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
196 /* Wait for the clocks to stabilize. */
199 /* Enable the pipe */
200 temp = REG_READ(pipeconf_reg);
201 if ((temp & PIPEACONF_ENABLE) == 0)
202 REG_WRITE(pipeconf_reg, temp | PIPEACONF_ENABLE);
203 /* Enable the plane */
204 temp = REG_READ(dspcntr_reg);
205 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
206 REG_WRITE(dspcntr_reg,
207 temp | DISPLAY_PLANE_ENABLE);
208 /* Flush the plane changes */
209 REG_WRITE(dspbase_reg, REG_READ(dspbase_reg));
212 psb_intel_crtc_load_lut(crtc);
214 /* Give the overlay scaler a chance to enable
215 if it's on this pipe */
216 /* psb_intel_crtc_dpms_video(crtc, true); TODO */
218 case DRM_MODE_DPMS_OFF:
219 /* Give the overlay scaler a chance to disable
220 * if it's on this pipe */
221 /* psb_intel_crtc_dpms_video(crtc, FALSE); TODO */
223 /* Disable the VGA plane that we never use */
224 REG_WRITE(VGACNTRL, VGA_DISP_DISABLE);
225 /* Disable display plane */
226 temp = REG_READ(dspcntr_reg);
227 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
228 REG_WRITE(dspcntr_reg,
229 temp & ~DISPLAY_PLANE_ENABLE);
230 /* Flush the plane changes */
231 REG_WRITE(dspbase_reg, REG_READ(dspbase_reg));
232 REG_READ(dspbase_reg);
235 /* Next, disable display pipes */
236 temp = REG_READ(pipeconf_reg);
237 if ((temp & PIPEACONF_ENABLE) != 0) {
238 REG_WRITE(pipeconf_reg, temp & ~PIPEACONF_ENABLE);
239 REG_READ(pipeconf_reg);
241 /* Wait for for the pipe disable to take effect. */
242 psb_intel_wait_for_vblank(dev);
244 temp = REG_READ(dpll_reg);
245 if ((temp & DPLL_VCO_ENABLE) != 0) {
246 REG_WRITE(dpll_reg, temp & ~DPLL_VCO_ENABLE);
250 /* Wait for the clocks to turn off. */
255 /*Set FIFO Watermarks*/
256 REG_WRITE(DSPARB, 0x3FFF);
257 REG_WRITE(DSPFW1, 0x3F88080A);
258 REG_WRITE(DSPFW2, 0x0b060808);
259 REG_WRITE(DSPFW3, 0x0);
260 REG_WRITE(DSPFW4, 0x08030404);
261 REG_WRITE(DSPFW5, 0x04040404);
262 REG_WRITE(DSPFW6, 0x78);
263 REG_WRITE(0x70400, REG_READ(0x70400) | 0x4000);
264 /* Must write Bit 14 of the Chicken Bit Register */
270 * Return the pipe currently connected to the panel fitter,
271 * or -1 if the panel fitter is not present or not in use
273 static int oaktrail_panel_fitter_pipe(struct drm_device *dev)
277 pfit_control = REG_READ(PFIT_CONTROL);
279 /* See if the panel fitter is in use */
280 if ((pfit_control & PFIT_ENABLE) == 0)
282 return (pfit_control >> 29) & 3;
285 static int oaktrail_crtc_mode_set(struct drm_crtc *crtc,
286 struct drm_display_mode *mode,
287 struct drm_display_mode *adjusted_mode,
289 struct drm_framebuffer *old_fb)
291 struct drm_device *dev = crtc->dev;
292 struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(crtc);
293 struct drm_psb_private *dev_priv = dev->dev_private;
294 int pipe = psb_intel_crtc->pipe;
295 int fp_reg = (pipe == 0) ? MRST_FPA0 : FPB0;
296 int dpll_reg = (pipe == 0) ? MRST_DPLL_A : DPLL_B;
297 int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
298 int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
299 int htot_reg = (pipe == 0) ? HTOTAL_A : HTOTAL_B;
300 int hblank_reg = (pipe == 0) ? HBLANK_A : HBLANK_B;
301 int hsync_reg = (pipe == 0) ? HSYNC_A : HSYNC_B;
302 int vtot_reg = (pipe == 0) ? VTOTAL_A : VTOTAL_B;
303 int vblank_reg = (pipe == 0) ? VBLANK_A : VBLANK_B;
304 int vsync_reg = (pipe == 0) ? VSYNC_A : VSYNC_B;
305 int pipesrc_reg = (pipe == 0) ? PIPEASRC : PIPEBSRC;
307 struct oaktrail_clock_t clock;
308 u32 dpll = 0, fp = 0, dspcntr, pipeconf;
309 bool ok, is_sdvo = false;
310 bool is_lvds = false;
311 bool is_mipi = false;
312 struct drm_mode_config *mode_config = &dev->mode_config;
313 struct psb_intel_encoder *psb_intel_encoder = NULL;
314 uint64_t scalingType = DRM_MODE_SCALE_FULLSCREEN;
315 struct drm_connector *connector;
317 if (!gma_power_begin(dev, true))
320 memcpy(&psb_intel_crtc->saved_mode,
322 sizeof(struct drm_display_mode));
323 memcpy(&psb_intel_crtc->saved_adjusted_mode,
325 sizeof(struct drm_display_mode));
327 list_for_each_entry(connector, &mode_config->connector_list, head) {
328 if (!connector->encoder || connector->encoder->crtc != crtc)
331 psb_intel_encoder = psb_intel_attached_encoder(connector);
333 switch (psb_intel_encoder->type) {
334 case INTEL_OUTPUT_LVDS:
337 case INTEL_OUTPUT_SDVO:
340 case INTEL_OUTPUT_MIPI:
346 /* Disable the VGA plane that we never use */
347 REG_WRITE(VGACNTRL, VGA_DISP_DISABLE);
349 /* Disable the panel fitter if it was on our pipe */
350 if (oaktrail_panel_fitter_pipe(dev) == pipe)
351 REG_WRITE(PFIT_CONTROL, 0);
353 REG_WRITE(pipesrc_reg,
354 ((mode->crtc_hdisplay - 1) << 16) |
355 (mode->crtc_vdisplay - 1));
357 if (psb_intel_encoder)
358 drm_connector_property_get_value(connector,
359 dev->mode_config.scaling_mode_property, &scalingType);
361 if (scalingType == DRM_MODE_SCALE_NO_SCALE) {
362 /* Moorestown doesn't have register support for centering so
363 * we need to mess with the h/vblank and h/vsync start and
364 * ends to get centering */
365 int offsetX = 0, offsetY = 0;
367 offsetX = (adjusted_mode->crtc_hdisplay -
368 mode->crtc_hdisplay) / 2;
369 offsetY = (adjusted_mode->crtc_vdisplay -
370 mode->crtc_vdisplay) / 2;
372 REG_WRITE(htot_reg, (mode->crtc_hdisplay - 1) |
373 ((adjusted_mode->crtc_htotal - 1) << 16));
374 REG_WRITE(vtot_reg, (mode->crtc_vdisplay - 1) |
375 ((adjusted_mode->crtc_vtotal - 1) << 16));
376 REG_WRITE(hblank_reg,
377 (adjusted_mode->crtc_hblank_start - offsetX - 1) |
378 ((adjusted_mode->crtc_hblank_end - offsetX - 1) << 16));
380 (adjusted_mode->crtc_hsync_start - offsetX - 1) |
381 ((adjusted_mode->crtc_hsync_end - offsetX - 1) << 16));
382 REG_WRITE(vblank_reg,
383 (adjusted_mode->crtc_vblank_start - offsetY - 1) |
384 ((adjusted_mode->crtc_vblank_end - offsetY - 1) << 16));
386 (adjusted_mode->crtc_vsync_start - offsetY - 1) |
387 ((adjusted_mode->crtc_vsync_end - offsetY - 1) << 16));
389 REG_WRITE(htot_reg, (adjusted_mode->crtc_hdisplay - 1) |
390 ((adjusted_mode->crtc_htotal - 1) << 16));
391 REG_WRITE(vtot_reg, (adjusted_mode->crtc_vdisplay - 1) |
392 ((adjusted_mode->crtc_vtotal - 1) << 16));
393 REG_WRITE(hblank_reg, (adjusted_mode->crtc_hblank_start - 1) |
394 ((adjusted_mode->crtc_hblank_end - 1) << 16));
395 REG_WRITE(hsync_reg, (adjusted_mode->crtc_hsync_start - 1) |
396 ((adjusted_mode->crtc_hsync_end - 1) << 16));
397 REG_WRITE(vblank_reg, (adjusted_mode->crtc_vblank_start - 1) |
398 ((adjusted_mode->crtc_vblank_end - 1) << 16));
399 REG_WRITE(vsync_reg, (adjusted_mode->crtc_vsync_start - 1) |
400 ((adjusted_mode->crtc_vsync_end - 1) << 16));
403 /* Flush the plane changes */
405 struct drm_crtc_helper_funcs *crtc_funcs =
406 crtc->helper_private;
407 crtc_funcs->mode_set_base(crtc, x, y, old_fb);
411 pipeconf = REG_READ(pipeconf_reg);
413 /* Set up the display plane register */
414 dspcntr = REG_READ(dspcntr_reg);
415 dspcntr |= DISPPLANE_GAMMA_ENABLE;
418 dspcntr |= DISPPLANE_SEL_PIPE_A;
420 dspcntr |= DISPPLANE_SEL_PIPE_B;
423 goto oaktrail_crtc_mode_set_exit;
425 refclk = dev_priv->core_freq * 1000;
427 dpll = 0; /*BIT16 = 0 for 100MHz reference */
429 ok = mrstFindBestPLL(crtc, adjusted_mode->clock, refclk, &clock);
432 dev_dbg(dev->dev, "mrstFindBestPLL fail in oaktrail_crtc_mode_set.\n");
434 dev_dbg(dev->dev, "oaktrail_crtc_mode_set pixel clock = %d,"
435 "m = %x, p1 = %x.\n", clock.dot, clock.m,
439 fp = oaktrail_m_converts[(clock.m - MRST_M_MIN)] << 8;
441 dpll |= DPLL_VGA_MODE_DIS;
444 dpll |= DPLL_VCO_ENABLE;
447 dpll |= DPLLA_MODE_LVDS;
449 dpll |= DPLLB_MODE_DAC_SERIAL;
452 int sdvo_pixel_multiply =
453 adjusted_mode->clock / mode->clock;
455 dpll |= DPLL_DVO_HIGH_SPEED;
457 (sdvo_pixel_multiply -
458 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
462 /* compute bitmask from p1 value */
463 dpll |= (1 << (clock.p1 - 2)) << 17;
465 dpll |= DPLL_VCO_ENABLE;
467 mrstPrintPll("chosen", &clock);
469 if (dpll & DPLL_VCO_ENABLE) {
470 REG_WRITE(fp_reg, fp);
471 REG_WRITE(dpll_reg, dpll & ~DPLL_VCO_ENABLE);
473 /* Check the DPLLA lock bit PIPEACONF[29] */
477 REG_WRITE(fp_reg, fp);
478 REG_WRITE(dpll_reg, dpll);
480 /* Wait for the clocks to stabilize. */
483 /* write it again -- the BIOS does, after all */
484 REG_WRITE(dpll_reg, dpll);
486 /* Wait for the clocks to stabilize. */
489 REG_WRITE(pipeconf_reg, pipeconf);
490 REG_READ(pipeconf_reg);
491 psb_intel_wait_for_vblank(dev);
493 REG_WRITE(dspcntr_reg, dspcntr);
494 psb_intel_wait_for_vblank(dev);
496 oaktrail_crtc_mode_set_exit:
501 static bool oaktrail_crtc_mode_fixup(struct drm_crtc *crtc,
502 struct drm_display_mode *mode,
503 struct drm_display_mode *adjusted_mode)
508 static int oaktrail_pipe_set_base(struct drm_crtc *crtc,
509 int x, int y, struct drm_framebuffer *old_fb)
511 struct drm_device *dev = crtc->dev;
512 struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(crtc);
513 struct psb_framebuffer *psbfb = to_psb_fb(crtc->fb);
514 int pipe = psb_intel_crtc->pipe;
515 unsigned long start, offset;
517 int dspbase = (pipe == 0 ? DSPALINOFF : DSPBBASE);
518 int dspsurf = (pipe == 0 ? DSPASURF : DSPBSURF);
519 int dspstride = (pipe == 0) ? DSPASTRIDE : DSPBSTRIDE;
520 int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
526 dev_dbg(dev->dev, "No FB bound\n");
530 if (!gma_power_begin(dev, true))
533 start = psbfb->gtt->offset;
534 offset = y * crtc->fb->pitches[0] + x * (crtc->fb->bits_per_pixel / 8);
536 REG_WRITE(dspstride, crtc->fb->pitches[0]);
538 dspcntr = REG_READ(dspcntr_reg);
539 dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
541 switch (crtc->fb->bits_per_pixel) {
543 dspcntr |= DISPPLANE_8BPP;
546 if (crtc->fb->depth == 15)
547 dspcntr |= DISPPLANE_15_16BPP;
549 dspcntr |= DISPPLANE_16BPP;
553 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
556 dev_err(dev->dev, "Unknown color depth\n");
558 goto pipe_set_base_exit;
560 REG_WRITE(dspcntr_reg, dspcntr);
562 REG_WRITE(dspbase, offset);
564 REG_WRITE(dspsurf, start);
572 static void oaktrail_crtc_prepare(struct drm_crtc *crtc)
574 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
575 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
578 static void oaktrail_crtc_commit(struct drm_crtc *crtc)
580 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
581 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
584 const struct drm_crtc_helper_funcs oaktrail_helper_funcs = {
585 .dpms = oaktrail_crtc_dpms,
586 .mode_fixup = oaktrail_crtc_mode_fixup,
587 .mode_set = oaktrail_crtc_mode_set,
588 .mode_set_base = oaktrail_pipe_set_base,
589 .prepare = oaktrail_crtc_prepare,
590 .commit = oaktrail_crtc_commit,