drivers/gpu/drm/radeon/radeon_display.c

   1 /*
   2  * Copyright 2007-8 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21  * OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors: Dave Airlie
  24  *          Alex Deucher
  25  */
  26 #include "drmP.h"
  27 #include "radeon_drm.h"
  28 #include "radeon.h"
  29
  30 #include "atom.h"
  31 #include <asm/div64.h>
  32
  33 #include "drm_crtc_helper.h"
  34 #include "drm_edid.h"
  35
  36 static void avivo_crtc_load_lut(struct drm_crtc *crtc)
  37 {
  38         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
  39         struct drm_device *dev = crtc->dev;
  40         struct radeon_device *rdev = dev->dev_private;
  41         int i;
  42
  43         DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
  44         WREG32(AVIVO_DC_LUTA_CONTROL + radeon_crtc->crtc_offset, 0);
  45
  46         WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
  47         WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
  48         WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);
  49
  50         WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
  51         WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
  52         WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);
  53
  54         WREG32(AVIVO_DC_LUT_RW_SELECT, radeon_crtc->crtc_id);
  55         WREG32(AVIVO_DC_LUT_RW_MODE, 0);
  56         WREG32(AVIVO_DC_LUT_WRITE_EN_MASK, 0x0000003f);
  57
  58         WREG8(AVIVO_DC_LUT_RW_INDEX, 0);
  59         for (i = 0; i < 256; i++) {
  60                 WREG32(AVIVO_DC_LUT_30_COLOR,
  61                              (radeon_crtc->lut_r[i] << 20) |
  62                              (radeon_crtc->lut_g[i] << 10) |
  63                              (radeon_crtc->lut_b[i] << 0));
  64         }
  65
  66         WREG32(AVIVO_D1GRPH_LUT_SEL + radeon_crtc->crtc_offset, radeon_crtc->crtc_id);
  67 }
  68
  69 static void dce4_crtc_load_lut(struct drm_crtc *crtc)
  70 {
  71         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
  72         struct drm_device *dev = crtc->dev;
  73         struct radeon_device *rdev = dev->dev_private;
  74         int i;
  75
  76         DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
  77         WREG32(EVERGREEN_DC_LUT_CONTROL + radeon_crtc->crtc_offset, 0);
  78
  79         WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
  80         WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
  81         WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);
  82
  83         WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
  84         WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
  85         WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);
  86
  87         WREG32(EVERGREEN_DC_LUT_RW_MODE + radeon_crtc->crtc_offset, 0);
  88         WREG32(EVERGREEN_DC_LUT_WRITE_EN_MASK + radeon_crtc->crtc_offset, 0x00000007);
  89
  90         WREG32(EVERGREEN_DC_LUT_RW_INDEX + radeon_crtc->crtc_offset, 0);
  91         for (i = 0; i < 256; i++) {
  92                 WREG32(EVERGREEN_DC_LUT_30_COLOR + radeon_crtc->crtc_offset,
  93                        (radeon_crtc->lut_r[i] << 20) |
  94                        (radeon_crtc->lut_g[i] << 10) |
  95                        (radeon_crtc->lut_b[i] << 0));
  96         }
  97 }
  98
  99 static void dce5_crtc_load_lut(struct drm_crtc *crtc)
 100 {
 101         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 102         struct drm_device *dev = crtc->dev;
 103         struct radeon_device *rdev = dev->dev_private;
 104         int i;
 105
 106         DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
 107
 108         WREG32(NI_INPUT_CSC_CONTROL + radeon_crtc->crtc_offset,
 109                (NI_INPUT_CSC_GRPH_MODE(NI_INPUT_CSC_BYPASS) |
 110                 NI_INPUT_CSC_OVL_MODE(NI_INPUT_CSC_BYPASS)));
 111         WREG32(NI_PRESCALE_GRPH_CONTROL + radeon_crtc->crtc_offset,
 112                NI_GRPH_PRESCALE_BYPASS);
 113         WREG32(NI_PRESCALE_OVL_CONTROL + radeon_crtc->crtc_offset,
 114                NI_OVL_PRESCALE_BYPASS);
 115         WREG32(NI_INPUT_GAMMA_CONTROL + radeon_crtc->crtc_offset,
 116                (NI_GRPH_INPUT_GAMMA_MODE(NI_INPUT_GAMMA_USE_LUT) |
 117                 NI_OVL_INPUT_GAMMA_MODE(NI_INPUT_GAMMA_USE_LUT)));
 118
 119         WREG32(EVERGREEN_DC_LUT_CONTROL + radeon_crtc->crtc_offset, 0);
 120
 121         WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
 122         WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
 123         WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);
 124
 125         WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
 126         WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
 127         WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);
 128
 129         WREG32(EVERGREEN_DC_LUT_RW_MODE + radeon_crtc->crtc_offset, 0);
 130         WREG32(EVERGREEN_DC_LUT_WRITE_EN_MASK + radeon_crtc->crtc_offset, 0x00000007);
 131
 132         WREG32(EVERGREEN_DC_LUT_RW_INDEX + radeon_crtc->crtc_offset, 0);
 133         for (i = 0; i < 256; i++) {
 134                 WREG32(EVERGREEN_DC_LUT_30_COLOR + radeon_crtc->crtc_offset,
 135                        (radeon_crtc->lut_r[i] << 20) |
 136                        (radeon_crtc->lut_g[i] << 10) |
 137                        (radeon_crtc->lut_b[i] << 0));
 138         }
 139
 140         WREG32(NI_DEGAMMA_CONTROL + radeon_crtc->crtc_offset,
 141                (NI_GRPH_DEGAMMA_MODE(NI_DEGAMMA_BYPASS) |
 142                 NI_OVL_DEGAMMA_MODE(NI_DEGAMMA_BYPASS) |
 143                 NI_ICON_DEGAMMA_MODE(NI_DEGAMMA_BYPASS) |
 144                 NI_CURSOR_DEGAMMA_MODE(NI_DEGAMMA_BYPASS)));
 145         WREG32(NI_GAMUT_REMAP_CONTROL + radeon_crtc->crtc_offset,
 146                (NI_GRPH_GAMUT_REMAP_MODE(NI_GAMUT_REMAP_BYPASS) |
 147                 NI_OVL_GAMUT_REMAP_MODE(NI_GAMUT_REMAP_BYPASS)));
 148         WREG32(NI_REGAMMA_CONTROL + radeon_crtc->crtc_offset,
 149                (NI_GRPH_REGAMMA_MODE(NI_REGAMMA_BYPASS) |
 150                 NI_OVL_REGAMMA_MODE(NI_REGAMMA_BYPASS)));
 151         WREG32(NI_OUTPUT_CSC_CONTROL + radeon_crtc->crtc_offset,
 152                (NI_OUTPUT_CSC_GRPH_MODE(NI_OUTPUT_CSC_BYPASS) |
 153                 NI_OUTPUT_CSC_OVL_MODE(NI_OUTPUT_CSC_BYPASS)));
 154         /* XXX match this to the depth of the crtc fmt block, move to modeset? */
 155         WREG32(0x6940 + radeon_crtc->crtc_offset, 0);
 156
 157 }
 158
 159 static void legacy_crtc_load_lut(struct drm_crtc *crtc)
 160 {
 161         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 162         struct drm_device *dev = crtc->dev;
 163         struct radeon_device *rdev = dev->dev_private;
 164         int i;
 165         uint32_t dac2_cntl;
 166
 167         dac2_cntl = RREG32(RADEON_DAC_CNTL2);
 168         if (radeon_crtc->crtc_id == 0)
 169                 dac2_cntl &= (uint32_t)~RADEON_DAC2_PALETTE_ACC_CTL;
 170         else
 171                 dac2_cntl |= RADEON_DAC2_PALETTE_ACC_CTL;
 172         WREG32(RADEON_DAC_CNTL2, dac2_cntl);
 173
 174         WREG8(RADEON_PALETTE_INDEX, 0);
 175         for (i = 0; i < 256; i++) {
 176                 WREG32(RADEON_PALETTE_30_DATA,
 177                              (radeon_crtc->lut_r[i] << 20) |
 178                              (radeon_crtc->lut_g[i] << 10) |
 179                              (radeon_crtc->lut_b[i] << 0));
 180         }
 181 }
 182
 183 void radeon_crtc_load_lut(struct drm_crtc *crtc)
 184 {
 185         struct drm_device *dev = crtc->dev;
 186         struct radeon_device *rdev = dev->dev_private;
 187
 188         if (!crtc->enabled)
 189                 return;
 190
 191         if (ASIC_IS_DCE5(rdev))
 192                 dce5_crtc_load_lut(crtc);
 193         else if (ASIC_IS_DCE4(rdev))
 194                 dce4_crtc_load_lut(crtc);
 195         else if (ASIC_IS_AVIVO(rdev))
 196                 avivo_crtc_load_lut(crtc);
 197         else
 198                 legacy_crtc_load_lut(crtc);
 199 }
 200
 201 /** Sets the color ramps on behalf of fbcon */
 202 void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 203                               u16 blue, int regno)
 204 {
 205         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 206
 207         radeon_crtc->lut_r[regno] = red >> 6;
 208         radeon_crtc->lut_g[regno] = green >> 6;
 209         radeon_crtc->lut_b[regno] = blue >> 6;
 210 }
 211
 212 /** Gets the color ramps on behalf of fbcon */
 213 void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 214                               u16 *blue, int regno)
 215 {
 216         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 217
 218         *red = radeon_crtc->lut_r[regno] << 6;
 219         *green = radeon_crtc->lut_g[regno] << 6;
 220         *blue = radeon_crtc->lut_b[regno] << 6;
 221 }
 222
 223 static void radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
 224                                   u16 *blue, uint32_t start, uint32_t size)
 225 {
 226         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 227         int end = (start + size > 256) ? 256 : start + size, i;
 228
 229         /* userspace palettes are always correct as is */
 230         for (i = start; i < end; i++) {
 231                 radeon_crtc->lut_r[i] = red[i] >> 6;
 232                 radeon_crtc->lut_g[i] = green[i] >> 6;
 233                 radeon_crtc->lut_b[i] = blue[i] >> 6;
 234         }
 235         radeon_crtc_load_lut(crtc);
 236 }
 237
 238 static void radeon_crtc_destroy(struct drm_crtc *crtc)
 239 {
 240         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 241
 242         drm_crtc_cleanup(crtc);
 243         kfree(radeon_crtc);
 244 }
 245
 246 /*
 247  * Handle unpin events outside the interrupt handler proper.
 248  */
 249 static void radeon_unpin_work_func(struct work_struct *__work)
 250 {
 251         struct radeon_unpin_work *work =
 252                 container_of(__work, struct radeon_unpin_work, work);
 253         int r;
 254
 255         /* unpin of the old buffer */
 256         r = radeon_bo_reserve(work->old_rbo, false);
 257         if (likely(r == 0)) {
 258                 r = radeon_bo_unpin(work->old_rbo);
 259                 if (unlikely(r != 0)) {
 260                         DRM_ERROR("failed to unpin buffer after flip\n");
 261                 }
 262                 radeon_bo_unreserve(work->old_rbo);
 263         } else
 264                 DRM_ERROR("failed to reserve buffer after flip\n");
 265
 266         drm_gem_object_unreference_unlocked(&work->old_rbo->gem_base);
 267         kfree(work);
 268 }
 269
 270 void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id)
 271 {
 272         struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
 273         struct radeon_unpin_work *work;
 274         struct drm_pending_vblank_event *e;
 275         struct timeval now;
 276         unsigned long flags;
 277         u32 update_pending;
 278         int vpos, hpos;
 279
 280         spin_lock_irqsave(&rdev->ddev->event_lock, flags);
 281         work = radeon_crtc->unpin_work;
 282         if (work == NULL ||
 283             (work->fence && !radeon_fence_signaled(work->fence))) {
 284                 spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);
 285                 return;
 286         }
 287         /* New pageflip, or just completion of a previous one? */
 288         if (!radeon_crtc->deferred_flip_completion) {
 289                 /* do the flip (mmio) */
 290                 update_pending = radeon_page_flip(rdev, crtc_id, work->new_crtc_base);
 291         } else {
 292                 /* This is just a completion of a flip queued in crtc
 293                  * at last invocation. Make sure we go directly to
 294                  * completion routine.
 295                  */
 296                 update_pending = 0;
 297                 radeon_crtc->deferred_flip_completion = 0;
 298         }
 299
 300         /* Has the pageflip already completed in crtc, or is it certain
 301          * to complete in this vblank?
 302          */
 303         if (update_pending &&
 304             (DRM_SCANOUTPOS_VALID & radeon_get_crtc_scanoutpos(rdev->ddev, crtc_id,
 305                                                                &vpos, &hpos)) &&
 306             ((vpos >= (99 * rdev->mode_info.crtcs[crtc_id]->base.hwmode.crtc_vdisplay)/100) ||
 307              (vpos < 0 && !ASIC_IS_AVIVO(rdev)))) {
 308                 /* crtc didn't flip in this target vblank interval,
 309                  * but flip is pending in crtc. Based on the current
 310                  * scanout position we know that the current frame is
 311                  * (nearly) complete and the flip will (likely)
 312                  * complete before the start of the next frame.
 313                  */
 314                 update_pending = 0;
 315         }
 316         if (update_pending) {
 317                 /* crtc didn't flip in this target vblank interval,
 318                  * but flip is pending in crtc. It will complete it
 319                  * in next vblank interval, so complete the flip at
 320                  * next vblank irq.
 321                  */
 322                 radeon_crtc->deferred_flip_completion = 1;
 323                 spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);
 324                 return;
 325         }
 326
 327         /* Pageflip (will be) certainly completed in this vblank. Clean up. */
 328         radeon_crtc->unpin_work = NULL;
 329
 330         /* wakeup userspace */
 331         if (work->event) {
 332                 e = work->event;
 333                 e->event.sequence = drm_vblank_count_and_time(rdev->ddev, crtc_id, &now);
 334                 e->event.tv_sec = now.tv_sec;
 335                 e->event.tv_usec = now.tv_usec;
 336                 list_add_tail(&e->base.link, &e->base.file_priv->event_list);
 337                 wake_up_interruptible(&e->base.file_priv->event_wait);
 338         }
 339         spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);
 340
 341         drm_vblank_put(rdev->ddev, radeon_crtc->crtc_id);
 342         radeon_fence_unref(&work->fence);
 343         radeon_post_page_flip(work->rdev, work->crtc_id);
 344         schedule_work(&work->work);
 345 }
 346
 347 static int radeon_crtc_page_flip(struct drm_crtc *crtc,
 348                                  struct drm_framebuffer *fb,
 349                                  struct drm_pending_vblank_event *event)
 350 {
 351         struct drm_device *dev = crtc->dev;
 352         struct radeon_device *rdev = dev->dev_private;
 353         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 354         struct radeon_framebuffer *old_radeon_fb;
 355         struct radeon_framebuffer *new_radeon_fb;
 356         struct drm_gem_object *obj;
 357         struct radeon_bo *rbo;
 358         struct radeon_unpin_work *work;
 359         unsigned long flags;
 360         u32 tiling_flags, pitch_pixels;
 361         u64 base;
 362         int r;
 363
 364         work = kzalloc(sizeof *work, GFP_KERNEL);
 365         if (work == NULL)
 366                 return -ENOMEM;
 367
 368         work->event = event;
 369         work->rdev = rdev;
 370         work->crtc_id = radeon_crtc->crtc_id;
 371         old_radeon_fb = to_radeon_framebuffer(crtc->fb);
 372         new_radeon_fb = to_radeon_framebuffer(fb);
 373         /* schedule unpin of the old buffer */
 374         obj = old_radeon_fb->obj;
 375         /* take a reference to the old object */
 376         drm_gem_object_reference(obj);
 377         rbo = gem_to_radeon_bo(obj);
 378         work->old_rbo = rbo;
 379         obj = new_radeon_fb->obj;
 380         rbo = gem_to_radeon_bo(obj);
 381         if (rbo->tbo.sync_obj)
 382                 work->fence = radeon_fence_ref(rbo->tbo.sync_obj);
 383         INIT_WORK(&work->work, radeon_unpin_work_func);
 384
 385         /* We borrow the event spin lock for protecting unpin_work */
 386         spin_lock_irqsave(&dev->event_lock, flags);
 387         if (radeon_crtc->unpin_work) {
 388                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
 389                 r = -EBUSY;
 390                 goto unlock_free;
 391         }
 392         radeon_crtc->unpin_work = work;
 393         radeon_crtc->deferred_flip_completion = 0;
 394         spin_unlock_irqrestore(&dev->event_lock, flags);
 395
 396         /* pin the new buffer */
 397         DRM_DEBUG_DRIVER("flip-ioctl() cur_fbo = %p, cur_bbo = %p\n",
 398                          work->old_rbo, rbo);
 399
 400         r = radeon_bo_reserve(rbo, false);
 401         if (unlikely(r != 0)) {
 402                 DRM_ERROR("failed to reserve new rbo buffer before flip\n");
 403                 goto pflip_cleanup;
 404         }
 405         /* Only 27 bit offset for legacy CRTC */
 406         r = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 407                                      ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27, &base);
 408         if (unlikely(r != 0)) {
 409                 radeon_bo_unreserve(rbo);
 410                 r = -EINVAL;
 411                 DRM_ERROR("failed to pin new rbo buffer before flip\n");
 412                 goto pflip_cleanup;
 413         }
 414         radeon_bo_get_tiling_flags(rbo, &tiling_flags, NULL);
 415         radeon_bo_unreserve(rbo);
 416
 417         if (!ASIC_IS_AVIVO(rdev)) {
 418                 /* crtc offset is from display base addr not FB location */
 419                 base -= radeon_crtc->legacy_display_base_addr;
 420                 pitch_pixels = fb->pitches[0] / (fb->bits_per_pixel / 8);
 421
 422                 if (tiling_flags & RADEON_TILING_MACRO) {
 423                         if (ASIC_IS_R300(rdev)) {
 424                                 base &= ~0x7ff;
 425                         } else {
 426                                 int byteshift = fb->bits_per_pixel >> 4;
 427                                 int tile_addr = (((crtc->y >> 3) * pitch_pixels +  crtc->x) >> (8 - byteshift)) << 11;
 428                                 base += tile_addr + ((crtc->x << byteshift) % 256) + ((crtc->y % 8) << 8);
 429                         }
 430                 } else {
 431                         int offset = crtc->y * pitch_pixels + crtc->x;
 432                         switch (fb->bits_per_pixel) {
 433                         case 8:
 434                         default:
 435                                 offset *= 1;
 436                                 break;
 437                         case 15:
 438                         case 16:
 439                                 offset *= 2;
 440                                 break;
 441                         case 24:
 442                                 offset *= 3;
 443                                 break;
 444                         case 32:
 445                                 offset *= 4;
 446                                 break;
 447                         }
 448                         base += offset;
 449                 }
 450                 base &= ~7;
 451         }
 452
 453         spin_lock_irqsave(&dev->event_lock, flags);
 454         work->new_crtc_base = base;
 455         spin_unlock_irqrestore(&dev->event_lock, flags);
 456
 457         /* update crtc fb */
 458         crtc->fb = fb;
 459
 460         r = drm_vblank_get(dev, radeon_crtc->crtc_id);
 461         if (r) {
 462                 DRM_ERROR("failed to get vblank before flip\n");
 463                 goto pflip_cleanup1;
 464         }
 465
 466         /* set the proper interrupt */
 467         radeon_pre_page_flip(rdev, radeon_crtc->crtc_id);
 468
 469         return 0;
 470
 471 pflip_cleanup1:
 472         if (unlikely(radeon_bo_reserve(rbo, false) != 0)) {
 473                 DRM_ERROR("failed to reserve new rbo in error path\n");
 474                 goto pflip_cleanup;
 475         }
 476         if (unlikely(radeon_bo_unpin(rbo) != 0)) {
 477                 DRM_ERROR("failed to unpin new rbo in error path\n");
 478         }
 479         radeon_bo_unreserve(rbo);
 480
 481 pflip_cleanup:
 482         spin_lock_irqsave(&dev->event_lock, flags);
 483         radeon_crtc->unpin_work = NULL;
 484 unlock_free:
 485         spin_unlock_irqrestore(&dev->event_lock, flags);
 486         drm_gem_object_unreference_unlocked(old_radeon_fb->obj);
 487         radeon_fence_unref(&work->fence);
 488         kfree(work);
 489
 490         return r;
 491 }
 492
 493 static const struct drm_crtc_funcs radeon_crtc_funcs = {
 494         .cursor_set = radeon_crtc_cursor_set,
 495         .cursor_move = radeon_crtc_cursor_move,
 496         .gamma_set = radeon_crtc_gamma_set,
 497         .set_config = drm_crtc_helper_set_config,
 498         .destroy = radeon_crtc_destroy,
 499         .page_flip = radeon_crtc_page_flip,
 500 };
 501
 502 static void radeon_crtc_init(struct drm_device *dev, int index)
 503 {
 504         struct radeon_device *rdev = dev->dev_private;
 505         struct radeon_crtc *radeon_crtc;
 506         int i;
 507
 508         radeon_crtc = kzalloc(sizeof(struct radeon_crtc) + (RADEONFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
 509         if (radeon_crtc == NULL)
 510                 return;
 511
 512         drm_crtc_init(dev, &radeon_crtc->base, &radeon_crtc_funcs);
 513
 514         drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256);
 515         radeon_crtc->crtc_id = index;
 516         rdev->mode_info.crtcs[index] = radeon_crtc;
 517
 518 #if 0
 519         radeon_crtc->mode_set.crtc = &radeon_crtc->base;
 520         radeon_crtc->mode_set.connectors = (struct drm_connector **)(radeon_crtc + 1);
 521         radeon_crtc->mode_set.num_connectors = 0;
 522 #endif
 523
 524         for (i = 0; i < 256; i++) {
 525                 radeon_crtc->lut_r[i] = i << 2;
 526                 radeon_crtc->lut_g[i] = i << 2;
 527                 radeon_crtc->lut_b[i] = i << 2;
 528         }
 529
 530         if (rdev->is_atom_bios && (ASIC_IS_AVIVO(rdev) || radeon_r4xx_atom))
 531                 radeon_atombios_init_crtc(dev, radeon_crtc);
 532         else
 533                 radeon_legacy_init_crtc(dev, radeon_crtc);
 534 }
 535
 536 static const char *encoder_names[37] = {
 537         "NONE",
 538         "INTERNAL_LVDS",
 539         "INTERNAL_TMDS1",
 540         "INTERNAL_TMDS2",
 541         "INTERNAL_DAC1",
 542         "INTERNAL_DAC2",
 543         "INTERNAL_SDVOA",
 544         "INTERNAL_SDVOB",
 545         "SI170B",
 546         "CH7303",
 547         "CH7301",
 548         "INTERNAL_DVO1",
 549         "EXTERNAL_SDVOA",
 550         "EXTERNAL_SDVOB",
 551         "TITFP513",
 552         "INTERNAL_LVTM1",
 553         "VT1623",
 554         "HDMI_SI1930",
 555         "HDMI_INTERNAL",
 556         "INTERNAL_KLDSCP_TMDS1",
 557         "INTERNAL_KLDSCP_DVO1",
 558         "INTERNAL_KLDSCP_DAC1",
 559         "INTERNAL_KLDSCP_DAC2",
 560         "SI178",
 561         "MVPU_FPGA",
 562         "INTERNAL_DDI",
 563         "VT1625",
 564         "HDMI_SI1932",
 565         "DP_AN9801",
 566         "DP_DP501",
 567         "INTERNAL_UNIPHY",
 568         "INTERNAL_KLDSCP_LVTMA",
 569         "INTERNAL_UNIPHY1",
 570         "INTERNAL_UNIPHY2",
 571         "NUTMEG",
 572         "TRAVIS",
 573         "INTERNAL_VCE"
 574 };
 575
 576 static const char *connector_names[15] = {
 577         "Unknown",
 578         "VGA",
 579         "DVI-I",
 580         "DVI-D",
 581         "DVI-A",
 582         "Composite",
 583         "S-video",
 584         "LVDS",
 585         "Component",
 586         "DIN",
 587         "DisplayPort",
 588         "HDMI-A",
 589         "HDMI-B",
 590         "TV",
 591         "eDP",
 592 };
 593
 594 static const char *hpd_names[6] = {
 595         "HPD1",
 596         "HPD2",
 597         "HPD3",
 598         "HPD4",
 599         "HPD5",
 600         "HPD6",
 601 };
 602
 603 static void radeon_print_display_setup(struct drm_device *dev)
 604 {
 605         struct drm_connector *connector;
 606         struct radeon_connector *radeon_connector;
 607         struct drm_encoder *encoder;
 608         struct radeon_encoder *radeon_encoder;
 609         uint32_t devices;
 610         int i = 0;
 611
 612         DRM_INFO("Radeon Display Connectors\n");
 613         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 614                 radeon_connector = to_radeon_connector(connector);
 615                 DRM_INFO("Connector %d:\n", i);
 616                 DRM_INFO("  %s\n", connector_names[connector->connector_type]);
 617                 if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)
 618                         DRM_INFO("  %s\n", hpd_names[radeon_connector->hpd.hpd]);
 619                 if (radeon_connector->ddc_bus) {
 620                         DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
 621                                  radeon_connector->ddc_bus->rec.mask_clk_reg,
 622                                  radeon_connector->ddc_bus->rec.mask_data_reg,
 623                                  radeon_connector->ddc_bus->rec.a_clk_reg,
 624                                  radeon_connector->ddc_bus->rec.a_data_reg,
 625                                  radeon_connector->ddc_bus->rec.en_clk_reg,
 626                                  radeon_connector->ddc_bus->rec.en_data_reg,
 627                                  radeon_connector->ddc_bus->rec.y_clk_reg,
 628                                  radeon_connector->ddc_bus->rec.y_data_reg);
 629                         if (radeon_connector->router.ddc_valid)
 630                                 DRM_INFO("  DDC Router 0x%x/0x%x\n",
 631                                          radeon_connector->router.ddc_mux_control_pin,
 632                                          radeon_connector->router.ddc_mux_state);
 633                         if (radeon_connector->router.cd_valid)
 634                                 DRM_INFO("  Clock/Data Router 0x%x/0x%x\n",
 635                                          radeon_connector->router.cd_mux_control_pin,
 636                                          radeon_connector->router.cd_mux_state);
 637                 } else {
 638                         if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
 639                             connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
 640                             connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
 641                             connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
 642                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
 643                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
 644                                 DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");
 645                 }
 646                 DRM_INFO("  Encoders:\n");
 647                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 648                         radeon_encoder = to_radeon_encoder(encoder);
 649                         devices = radeon_encoder->devices & radeon_connector->devices;
 650                         if (devices) {
 651                                 if (devices & ATOM_DEVICE_CRT1_SUPPORT)
 652                                         DRM_INFO("    CRT1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 653                                 if (devices & ATOM_DEVICE_CRT2_SUPPORT)
 654                                         DRM_INFO("    CRT2: %s\n", encoder_names[radeon_encoder->encoder_id]);
 655                                 if (devices & ATOM_DEVICE_LCD1_SUPPORT)
 656                                         DRM_INFO("    LCD1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 657                                 if (devices & ATOM_DEVICE_DFP1_SUPPORT)
 658                                         DRM_INFO("    DFP1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 659                                 if (devices & ATOM_DEVICE_DFP2_SUPPORT)
 660                                         DRM_INFO("    DFP2: %s\n", encoder_names[radeon_encoder->encoder_id]);
 661                                 if (devices & ATOM_DEVICE_DFP3_SUPPORT)
 662                                         DRM_INFO("    DFP3: %s\n", encoder_names[radeon_encoder->encoder_id]);
 663                                 if (devices & ATOM_DEVICE_DFP4_SUPPORT)
 664                                         DRM_INFO("    DFP4: %s\n", encoder_names[radeon_encoder->encoder_id]);
 665                                 if (devices & ATOM_DEVICE_DFP5_SUPPORT)
 666                                         DRM_INFO("    DFP5: %s\n", encoder_names[radeon_encoder->encoder_id]);
 667                                 if (devices & ATOM_DEVICE_DFP6_SUPPORT)
 668                                         DRM_INFO("    DFP6: %s\n", encoder_names[radeon_encoder->encoder_id]);
 669                                 if (devices & ATOM_DEVICE_TV1_SUPPORT)
 670                                         DRM_INFO("    TV1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 671                                 if (devices & ATOM_DEVICE_CV_SUPPORT)
 672                                         DRM_INFO("    CV: %s\n", encoder_names[radeon_encoder->encoder_id]);
 673                         }
 674                 }
 675                 i++;
 676         }
 677 }
 678
 679 static bool radeon_setup_enc_conn(struct drm_device *dev)
 680 {
 681         struct radeon_device *rdev = dev->dev_private;
 682         bool ret = false;
 683
 684         if (rdev->bios) {
 685                 if (rdev->is_atom_bios) {
 686                         ret = radeon_get_atom_connector_info_from_supported_devices_table(dev);
 687                         if (ret == false)
 688                                 ret = radeon_get_atom_connector_info_from_object_table(dev);
 689                 } else {
 690                         ret = radeon_get_legacy_connector_info_from_bios(dev);
 691                         if (ret == false)
 692                                 ret = radeon_get_legacy_connector_info_from_table(dev);
 693                 }
 694         } else {
 695                 if (!ASIC_IS_AVIVO(rdev))
 696                         ret = radeon_get_legacy_connector_info_from_table(dev);
 697         }
 698         if (ret) {
 699                 radeon_setup_encoder_clones(dev);
 700                 radeon_print_display_setup(dev);
 701         }
 702
 703         return ret;
 704 }
 705
 706 int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 707 {
 708         struct drm_device *dev = radeon_connector->base.dev;
 709         struct radeon_device *rdev = dev->dev_private;
 710         int ret = 0;
 711
 712         /* on hw with routers, select right port */
 713         if (radeon_connector->router.ddc_valid)
 714                 radeon_router_select_ddc_port(radeon_connector);
 715
 716         if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
 717             (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) ||
 718             (radeon_connector_encoder_get_dp_bridge_encoder_id(&radeon_connector->base) !=
 719              ENCODER_OBJECT_ID_NONE)) {
 720                 struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
 721
 722                 if ((dig->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT ||
 723                      dig->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) && dig->dp_i2c_bus)
 724                         radeon_connector->edid = drm_get_edid(&radeon_connector->base,
 725                                                               &dig->dp_i2c_bus->adapter);
 726                 else if (radeon_connector->ddc_bus && !radeon_connector->edid)
 727                         radeon_connector->edid = drm_get_edid(&radeon_connector->base,
 728                                                               &radeon_connector->ddc_bus->adapter);
 729         } else {
 730                 if (radeon_connector->ddc_bus && !radeon_connector->edid)
 731                         radeon_connector->edid = drm_get_edid(&radeon_connector->base,
 732                                                               &radeon_connector->ddc_bus->adapter);
 733         }
 734
 735         if (!radeon_connector->edid) {
 736                 if (rdev->is_atom_bios) {
 737                         /* some laptops provide a hardcoded edid in rom for LCDs */
 738                         if (((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_LVDS) ||
 739                              (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)))
 740                                 radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
 741                 } else
 742                         /* some servers provide a hardcoded edid in rom for KVMs */
 743                         radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
 744         }
 745         if (radeon_connector->edid) {
 746                 drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
 747                 ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
 748                 return ret;
 749         }
 750         drm_mode_connector_update_edid_property(&radeon_connector->base, NULL);
 751         return 0;
 752 }
 753
 754 /* avivo */
 755 static void avivo_get_fb_div(struct radeon_pll *pll,
 756                              u32 target_clock,
 757                              u32 post_div,
 758                              u32 ref_div,
 759                              u32 *fb_div,
 760                              u32 *frac_fb_div)
 761 {
 762         u32 tmp = post_div * ref_div;
 763
 764         tmp *= target_clock;
 765         *fb_div = tmp / pll->reference_freq;
 766         *frac_fb_div = tmp % pll->reference_freq;
 767
 768         if (*fb_div > pll->max_feedback_div)
 769                 *fb_div = pll->max_feedback_div;
 770         else if (*fb_div < pll->min_feedback_div)
 771                 *fb_div = pll->min_feedback_div;
 772 }
 773
 774 static u32 avivo_get_post_div(struct radeon_pll *pll,
 775                               u32 target_clock)
 776 {
 777         u32 vco, post_div, tmp;
 778
 779         if (pll->flags & RADEON_PLL_USE_POST_DIV)
 780                 return pll->post_div;
 781
 782         if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP) {
 783                 if (pll->flags & RADEON_PLL_IS_LCD)
 784                         vco = pll->lcd_pll_out_min;
 785                 else
 786                         vco = pll->pll_out_min;
 787         } else {
 788                 if (pll->flags & RADEON_PLL_IS_LCD)
 789                         vco = pll->lcd_pll_out_max;
 790                 else
 791                         vco = pll->pll_out_max;
 792         }
 793
 794         post_div = vco / target_clock;
 795         tmp = vco % target_clock;
 796
 797         if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP) {
 798                 if (tmp)
 799                         post_div++;
 800         } else {
 801                 if (!tmp)
 802                         post_div--;
 803         }
 804
 805         if (post_div > pll->max_post_div)
 806                 post_div = pll->max_post_div;
 807         else if (post_div < pll->min_post_div)
 808                 post_div = pll->min_post_div;
 809
 810         return post_div;
 811 }
 812
 813 #define MAX_TOLERANCE 10
 814
 815 void radeon_compute_pll_avivo(struct radeon_pll *pll,
 816                               u32 freq,
 817                               u32 *dot_clock_p,
 818                               u32 *fb_div_p,
 819                               u32 *frac_fb_div_p,
 820                               u32 *ref_div_p,
 821                               u32 *post_div_p)
 822 {
 823         u32 target_clock = freq / 10;
 824         u32 post_div = avivo_get_post_div(pll, target_clock);
 825         u32 ref_div = pll->min_ref_div;
 826         u32 fb_div = 0, frac_fb_div = 0, tmp;
 827
 828         if (pll->flags & RADEON_PLL_USE_REF_DIV)
 829                 ref_div = pll->reference_div;
 830
 831         if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
 832                 avivo_get_fb_div(pll, target_clock, post_div, ref_div, &fb_div, &frac_fb_div);
 833                 frac_fb_div = (100 * frac_fb_div) / pll->reference_freq;
 834                 if (frac_fb_div >= 5) {
 835                         frac_fb_div -= 5;
 836                         frac_fb_div = frac_fb_div / 10;
 837                         frac_fb_div++;
 838                 }
 839                 if (frac_fb_div >= 10) {
 840                         fb_div++;
 841                         frac_fb_div = 0;
 842                 }
 843         } else {
 844                 while (ref_div <= pll->max_ref_div) {
 845                         avivo_get_fb_div(pll, target_clock, post_div, ref_div,
 846                                          &fb_div, &frac_fb_div);
 847                         if (frac_fb_div >= (pll->reference_freq / 2))
 848                                 fb_div++;
 849                         frac_fb_div = 0;
 850                         tmp = (pll->reference_freq * fb_div) / (post_div * ref_div);
 851                         tmp = (tmp * 10000) / target_clock;
 852
 853                         if (tmp > (10000 + MAX_TOLERANCE))
 854                                 ref_div++;
 855                         else if (tmp >= (10000 - MAX_TOLERANCE))
 856                                 break;
 857                         else
 858                                 ref_div++;
 859                 }
 860         }
 861
 862         *dot_clock_p = ((pll->reference_freq * fb_div * 10) + (pll->reference_freq * frac_fb_div)) /
 863                 (ref_div * post_div * 10);
 864         *fb_div_p = fb_div;
 865         *frac_fb_div_p = frac_fb_div;
 866         *ref_div_p = ref_div;
 867         *post_div_p = post_div;
 868         DRM_DEBUG_KMS("%d, pll dividers - fb: %d.%d ref: %d, post %d\n",
 869                       *dot_clock_p, fb_div, frac_fb_div, ref_div, post_div);
 870 }
 871
 872 /* pre-avivo */
 873 static inline uint32_t radeon_div(uint64_t n, uint32_t d)
 874 {
 875         uint64_t mod;
 876
 877         n += d / 2;
 878
 879         mod = do_div(n, d);
 880         return n;
 881 }
 882
 883 void radeon_compute_pll_legacy(struct radeon_pll *pll,
 884                                uint64_t freq,
 885                                uint32_t *dot_clock_p,
 886                                uint32_t *fb_div_p,
 887                                uint32_t *frac_fb_div_p,
 888                                uint32_t *ref_div_p,
 889                                uint32_t *post_div_p)
 890 {
 891         uint32_t min_ref_div = pll->min_ref_div;
 892         uint32_t max_ref_div = pll->max_ref_div;
 893         uint32_t min_post_div = pll->min_post_div;
 894         uint32_t max_post_div = pll->max_post_div;
 895         uint32_t min_fractional_feed_div = 0;
 896         uint32_t max_fractional_feed_div = 0;
 897         uint32_t best_vco = pll->best_vco;
 898         uint32_t best_post_div = 1;
 899         uint32_t best_ref_div = 1;
 900         uint32_t best_feedback_div = 1;
 901         uint32_t best_frac_feedback_div = 0;
 902         uint32_t best_freq = -1;
 903         uint32_t best_error = 0xffffffff;
 904         uint32_t best_vco_diff = 1;
 905         uint32_t post_div;
 906         u32 pll_out_min, pll_out_max;
 907
 908         DRM_DEBUG_KMS("PLL freq %llu %u %u\n", freq, pll->min_ref_div, pll->max_ref_div);
 909         freq = freq * 1000;
 910
 911         if (pll->flags & RADEON_PLL_IS_LCD) {
 912                 pll_out_min = pll->lcd_pll_out_min;
 913                 pll_out_max = pll->lcd_pll_out_max;
 914         } else {
 915                 pll_out_min = pll->pll_out_min;
 916                 pll_out_max = pll->pll_out_max;
 917         }
 918
 919         if (pll_out_min > 64800)
 920                 pll_out_min = 64800;
 921
 922         if (pll->flags & RADEON_PLL_USE_REF_DIV)
 923                 min_ref_div = max_ref_div = pll->reference_div;
 924         else {
 925                 while (min_ref_div < max_ref_div-1) {
 926                         uint32_t mid = (min_ref_div + max_ref_div) / 2;
 927                         uint32_t pll_in = pll->reference_freq / mid;
 928                         if (pll_in < pll->pll_in_min)
 929                                 max_ref_div = mid;
 930                         else if (pll_in > pll->pll_in_max)
 931                                 min_ref_div = mid;
 932                         else
 933                                 break;
 934                 }
 935         }
 936
 937         if (pll->flags & RADEON_PLL_USE_POST_DIV)
 938                 min_post_div = max_post_div = pll->post_div;
 939
 940         if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
 941                 min_fractional_feed_div = pll->min_frac_feedback_div;
 942                 max_fractional_feed_div = pll->max_frac_feedback_div;
 943         }
 944
 945         for (post_div = max_post_div; post_div >= min_post_div; --post_div) {
 946                 uint32_t ref_div;
 947
 948                 if ((pll->flags & RADEON_PLL_NO_ODD_POST_DIV) && (post_div & 1))
 949                         continue;
 950
 951                 /* legacy radeons only have a few post_divs */
 952                 if (pll->flags & RADEON_PLL_LEGACY) {
 953                         if ((post_div == 5) ||
 954                             (post_div == 7) ||
 955                             (post_div == 9) ||
 956                             (post_div == 10) ||
 957                             (post_div == 11) ||
 958                             (post_div == 13) ||
 959                             (post_div == 14) ||
 960                             (post_div == 15))
 961                                 continue;
 962                 }
 963
 964                 for (ref_div = min_ref_div; ref_div <= max_ref_div; ++ref_div) {
 965                         uint32_t feedback_div, current_freq = 0, error, vco_diff;
 966                         uint32_t pll_in = pll->reference_freq / ref_div;
 967                         uint32_t min_feed_div = pll->min_feedback_div;
 968                         uint32_t max_feed_div = pll->max_feedback_div + 1;
 969
 970                         if (pll_in < pll->pll_in_min || pll_in > pll->pll_in_max)
 971                                 continue;
 972
 973                         while (min_feed_div < max_feed_div) {
 974                                 uint32_t vco;
 975                                 uint32_t min_frac_feed_div = min_fractional_feed_div;
 976                                 uint32_t max_frac_feed_div = max_fractional_feed_div + 1;
 977                                 uint32_t frac_feedback_div;
 978                                 uint64_t tmp;
 979
 980                                 feedback_div = (min_feed_div + max_feed_div) / 2;
 981
 982                                 tmp = (uint64_t)pll->reference_freq * feedback_div;
 983                                 vco = radeon_div(tmp, ref_div);
 984
 985                                 if (vco < pll_out_min) {
 986                                         min_feed_div = feedback_div + 1;
 987                                         continue;
 988                                 } else if (vco > pll_out_max) {
 989                                         max_feed_div = feedback_div;
 990                                         continue;
 991                                 }
 992
 993                                 while (min_frac_feed_div < max_frac_feed_div) {
 994                                         frac_feedback_div = (min_frac_feed_div + max_frac_feed_div) / 2;
 995                                         tmp = (uint64_t)pll->reference_freq * 10000 * feedback_div;
 996                                         tmp += (uint64_t)pll->reference_freq * 1000 * frac_feedback_div;
 997                                         current_freq = radeon_div(tmp, ref_div * post_div);
 998
 999                                         if (pll->flags & RADEON_PLL_PREFER_CLOSEST_LOWER) {
1000                                                 if (freq < current_freq)
1001                                                         error = 0xffffffff;
1002                                                 else
1003                                                         error = freq - current_freq;
1004                                         } else
1005                                                 error = abs(current_freq - freq);
1006                                         vco_diff = abs(vco - best_vco);
1007
1008                                         if ((best_vco == 0 && error < best_error) ||
1009                                             (best_vco != 0 &&
1010                                              ((best_error > 100 && error < best_error - 100) ||
1011                                               (abs(error - best_error) < 100 && vco_diff < best_vco_diff)))) {
1012                                                 best_post_div = post_div;
1013                                                 best_ref_div = ref_div;
1014                                                 best_feedback_div = feedback_div;
1015                                                 best_frac_feedback_div = frac_feedback_div;
1016                                                 best_freq = current_freq;
1017                                                 best_error = error;
1018                                                 best_vco_diff = vco_diff;
1019                                         } else if (current_freq == freq) {
1020                                                 if (best_freq == -1) {
1021                                                         best_post_div = post_div;
1022                                                         best_ref_div = ref_div;
1023                                                         best_feedback_div = feedback_div;
1024                                                         best_frac_feedback_div = frac_feedback_div;
1025                                                         best_freq = current_freq;
1026                                                         best_error = error;
1027                                                         best_vco_diff = vco_diff;
1028                                                 } else if (((pll->flags & RADEON_PLL_PREFER_LOW_REF_DIV) && (ref_div < best_ref_div)) ||
1029                                                            ((pll->flags & RADEON_PLL_PREFER_HIGH_REF_DIV) && (ref_div > best_ref_div)) ||
1030                                                            ((pll->flags & RADEON_PLL_PREFER_LOW_FB_DIV) && (feedback_div < best_feedback_div)) ||
1031                                                            ((pll->flags & RADEON_PLL_PREFER_HIGH_FB_DIV) && (feedback_div > best_feedback_div)) ||
1032                                                            ((pll->flags & RADEON_PLL_PREFER_LOW_POST_DIV) && (post_div < best_post_div)) ||
1033                                                            ((pll->flags & RADEON_PLL_PREFER_HIGH_POST_DIV) && (post_div > best_post_div))) {
1034                                                         best_post_div = post_div;
1035                                                         best_ref_div = ref_div;
1036                                                         best_feedback_div = feedback_div;
1037                                                         best_frac_feedback_div = frac_feedback_div;
1038                                                         best_freq = current_freq;
1039                                                         best_error = error;
1040                                                         best_vco_diff = vco_diff;
1041                                                 }
1042                                         }
1043                                         if (current_freq < freq)
1044                                                 min_frac_feed_div = frac_feedback_div + 1;
1045                                         else
1046                                                 max_frac_feed_div = frac_feedback_div;
1047                                 }
1048                                 if (current_freq < freq)
1049                                         min_feed_div = feedback_div + 1;
1050                                 else
1051                                         max_feed_div = feedback_div;
1052                         }
1053                 }
1054         }
1055
1056         *dot_clock_p = best_freq / 10000;
1057         *fb_div_p = best_feedback_div;
1058         *frac_fb_div_p = best_frac_feedback_div;
1059         *ref_div_p = best_ref_div;
1060         *post_div_p = best_post_div;
1061         DRM_DEBUG_KMS("%lld %d, pll dividers - fb: %d.%d ref: %d, post %d\n",
1062                       (long long)freq,
1063                       best_freq / 1000, best_feedback_div, best_frac_feedback_div,
1064                       best_ref_div, best_post_div);
1065
1066 }
1067
1068 static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb)
1069 {
1070         struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);
1071
1072         if (radeon_fb->obj) {
1073                 drm_gem_object_unreference_unlocked(radeon_fb->obj);
1074         }
1075         drm_framebuffer_cleanup(fb);
1076         kfree(radeon_fb);
1077 }
1078
1079 static int radeon_user_framebuffer_create_handle(struct drm_framebuffer *fb,
1080                                                   struct drm_file *file_priv,
1081                                                   unsigned int *handle)
1082 {
1083         struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);
1084
1085         return drm_gem_handle_create(file_priv, radeon_fb->obj, handle);
1086 }
1087
1088 static const struct drm_framebuffer_funcs radeon_fb_funcs = {
1089         .destroy = radeon_user_framebuffer_destroy,
1090         .create_handle = radeon_user_framebuffer_create_handle,
1091 };
1092
1093 int
1094 radeon_framebuffer_init(struct drm_device *dev,
1095                         struct radeon_framebuffer *rfb,
1096                         struct drm_mode_fb_cmd2 *mode_cmd,
1097                         struct drm_gem_object *obj)
1098 {
1099         int ret;
1100         rfb->obj = obj;
1101         ret = drm_framebuffer_init(dev, &rfb->base, &radeon_fb_funcs);
1102         if (ret) {
1103                 rfb->obj = NULL;
1104                 return ret;
1105         }
1106         drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
1107         return 0;
1108 }
1109
1110 static struct drm_framebuffer *
1111 radeon_user_framebuffer_create(struct drm_device *dev,
1112                                struct drm_file *file_priv,
1113                                struct drm_mode_fb_cmd2 *mode_cmd)
1114 {
1115         struct drm_gem_object *obj;
1116         struct radeon_framebuffer *radeon_fb;
1117         int ret;
1118
1119         obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
1120         if (obj ==  NULL) {
1121                 dev_err(&dev->pdev->dev, "No GEM object associated to handle 0x%08X, "
1122                         "can't create framebuffer\n", mode_cmd->handles[0]);
1123                 return ERR_PTR(-ENOENT);
1124         }
1125
1126         radeon_fb = kzalloc(sizeof(*radeon_fb), GFP_KERNEL);
1127         if (radeon_fb == NULL)
1128                 return ERR_PTR(-ENOMEM);
1129
1130         ret = radeon_framebuffer_init(dev, radeon_fb, mode_cmd, obj);
1131         if (ret) {
1132                 kfree(radeon_fb);
1133                 drm_gem_object_unreference_unlocked(obj);
1134                 return NULL;
1135         }
1136
1137         return &radeon_fb->base;
1138 }
1139
1140 static void radeon_output_poll_changed(struct drm_device *dev)
1141 {
1142         struct radeon_device *rdev = dev->dev_private;
1143         radeon_fb_output_poll_changed(rdev);
1144 }
1145
1146 static const struct drm_mode_config_funcs radeon_mode_funcs = {
1147         .fb_create = radeon_user_framebuffer_create,
1148         .output_poll_changed = radeon_output_poll_changed
1149 };
1150
1151 static struct drm_prop_enum_list radeon_tmds_pll_enum_list[] =
1152 {       { 0, "driver" },
1153         { 1, "bios" },
1154 };
1155
1156 static struct drm_prop_enum_list radeon_tv_std_enum_list[] =
1157 {       { TV_STD_NTSC, "ntsc" },
1158         { TV_STD_PAL, "pal" },
1159         { TV_STD_PAL_M, "pal-m" },
1160         { TV_STD_PAL_60, "pal-60" },
1161         { TV_STD_NTSC_J, "ntsc-j" },
1162         { TV_STD_SCART_PAL, "scart-pal" },
1163         { TV_STD_PAL_CN, "pal-cn" },
1164         { TV_STD_SECAM, "secam" },
1165 };
1166
1167 static struct drm_prop_enum_list radeon_underscan_enum_list[] =
1168 {       { UNDERSCAN_OFF, "off" },
1169         { UNDERSCAN_ON, "on" },
1170         { UNDERSCAN_AUTO, "auto" },
1171 };
1172
1173 static int radeon_modeset_create_props(struct radeon_device *rdev)
1174 {
1175         int sz;
1176
1177         if (rdev->is_atom_bios) {
1178                 rdev->mode_info.coherent_mode_property =
1179                         drm_property_create_range(rdev->ddev, 0 , "coherent", 0, 1);
1180                 if (!rdev->mode_info.coherent_mode_property)
1181                         return -ENOMEM;
1182         }
1183
1184         if (!ASIC_IS_AVIVO(rdev)) {
1185                 sz = ARRAY_SIZE(radeon_tmds_pll_enum_list);
1186                 rdev->mode_info.tmds_pll_property =
1187                         drm_property_create_enum(rdev->ddev, 0,
1188                                             "tmds_pll",
1189                                             radeon_tmds_pll_enum_list, sz);
1190         }
1191
1192         rdev->mode_info.load_detect_property =
1193                 drm_property_create_range(rdev->ddev, 0, "load detection", 0, 1);
1194         if (!rdev->mode_info.load_detect_property)
1195                 return -ENOMEM;
1196
1197         drm_mode_create_scaling_mode_property(rdev->ddev);
1198
1199         sz = ARRAY_SIZE(radeon_tv_std_enum_list);
1200         rdev->mode_info.tv_std_property =
1201                 drm_property_create_enum(rdev->ddev, 0,
1202                                     "tv standard",
1203                                     radeon_tv_std_enum_list, sz);
1204
1205         sz = ARRAY_SIZE(radeon_underscan_enum_list);
1206         rdev->mode_info.underscan_property =
1207                 drm_property_create_enum(rdev->ddev, 0,
1208                                     "underscan",
1209                                     radeon_underscan_enum_list, sz);
1210
1211         rdev->mode_info.underscan_hborder_property =
1212                 drm_property_create_range(rdev->ddev, 0,
1213                                         "underscan hborder", 0, 128);
1214         if (!rdev->mode_info.underscan_hborder_property)
1215                 return -ENOMEM;
1216
1217         rdev->mode_info.underscan_vborder_property =
1218                 drm_property_create_range(rdev->ddev, 0,
1219                                         "underscan vborder", 0, 128);
1220         if (!rdev->mode_info.underscan_vborder_property)
1221                 return -ENOMEM;
1222
1223         return 0;
1224 }
1225
1226 void radeon_update_display_priority(struct radeon_device *rdev)
1227 {
1228         /* adjustment options for the display watermarks */
1229         if ((radeon_disp_priority == 0) || (radeon_disp_priority > 2)) {
1230                 /* set display priority to high for r3xx, rv515 chips
1231                  * this avoids flickering due to underflow to the
1232                  * display controllers during heavy acceleration.
1233                  * Don't force high on rs4xx igp chips as it seems to
1234                  * affect the sound card.  See kernel bug 15982.
1235                  */
1236                 if ((ASIC_IS_R300(rdev) || (rdev->family == CHIP_RV515)) &&
1237                     !(rdev->flags & RADEON_IS_IGP))
1238                         rdev->disp_priority = 2;
1239                 else
1240                         rdev->disp_priority = 0;
1241         } else
1242                 rdev->disp_priority = radeon_disp_priority;
1243
1244 }
1245
1246 int radeon_modeset_init(struct radeon_device *rdev)
1247 {
1248         int i;
1249         int ret;
1250
1251         drm_mode_config_init(rdev->ddev);
1252         rdev->mode_info.mode_config_initialized = true;
1253
1254         rdev->ddev->mode_config.funcs = (void *)&radeon_mode_funcs;
1255
1256         if (ASIC_IS_DCE5(rdev)) {
1257                 rdev->ddev->mode_config.max_width = 16384;
1258                 rdev->ddev->mode_config.max_height = 16384;
1259         } else if (ASIC_IS_AVIVO(rdev)) {
1260                 rdev->ddev->mode_config.max_width = 8192;
1261                 rdev->ddev->mode_config.max_height = 8192;
1262         } else {
1263                 rdev->ddev->mode_config.max_width = 4096;
1264                 rdev->ddev->mode_config.max_height = 4096;
1265         }
1266
1267         rdev->ddev->mode_config.preferred_depth = 24;
1268         rdev->ddev->mode_config.prefer_shadow = 1;
1269
1270         rdev->ddev->mode_config.fb_base = rdev->mc.aper_base;
1271
1272         ret = radeon_modeset_create_props(rdev);
1273         if (ret) {
1274                 return ret;
1275         }
1276
1277         /* init i2c buses */
1278         radeon_i2c_init(rdev);
1279
1280         /* check combios for a valid hardcoded EDID - Sun servers */
1281         if (!rdev->is_atom_bios) {
1282                 /* check for hardcoded EDID in BIOS */
1283                 radeon_combios_check_hardcoded_edid(rdev);
1284         }
1285
1286         /* allocate crtcs */
1287         for (i = 0; i < rdev->num_crtc; i++) {
1288                 radeon_crtc_init(rdev->ddev, i);
1289         }
1290
1291         /* okay we should have all the bios connectors */
1292         ret = radeon_setup_enc_conn(rdev->ddev);
1293         if (!ret) {
1294                 return ret;
1295         }
1296
1297         /* init dig PHYs, disp eng pll */
1298         if (rdev->is_atom_bios) {
1299                 radeon_atom_encoder_init(rdev);
1300                 radeon_atom_disp_eng_pll_init(rdev);
1301         }
1302
1303         /* initialize hpd */
1304         radeon_hpd_init(rdev);
1305
1306         /* Initialize power management */
1307         radeon_pm_init(rdev);
1308
1309         radeon_fbdev_init(rdev);
1310         drm_kms_helper_poll_init(rdev->ddev);
1311
1312         return 0;
1313 }
1314
1315 void radeon_modeset_fini(struct radeon_device *rdev)
1316 {
1317         radeon_fbdev_fini(rdev);
1318         kfree(rdev->mode_info.bios_hardcoded_edid);
1319         radeon_pm_fini(rdev);
1320
1321         if (rdev->mode_info.mode_config_initialized) {
1322                 drm_kms_helper_poll_fini(rdev->ddev);
1323                 radeon_hpd_fini(rdev);
1324                 drm_mode_config_cleanup(rdev->ddev);
1325                 rdev->mode_info.mode_config_initialized = false;
1326         }
1327         /* free i2c buses */
1328         radeon_i2c_fini(rdev);
1329 }
1330
1331 static bool is_hdtv_mode(struct drm_display_mode *mode)
1332 {
1333         /* try and guess if this is a tv or a monitor */
1334         if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
1335             (mode->vdisplay == 576) || /* 576p */
1336             (mode->vdisplay == 720) || /* 720p */
1337             (mode->vdisplay == 1080)) /* 1080p */
1338                 return true;
1339         else
1340                 return false;
1341 }
1342
1343 bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
1344                                 struct drm_display_mode *mode,
1345                                 struct drm_display_mode *adjusted_mode)
1346 {
1347         struct drm_device *dev = crtc->dev;
1348         struct radeon_device *rdev = dev->dev_private;
1349         struct drm_encoder *encoder;
1350         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
1351         struct radeon_encoder *radeon_encoder;
1352         struct drm_connector *connector;
1353         struct radeon_connector *radeon_connector;
1354         bool first = true;
1355         u32 src_v = 1, dst_v = 1;
1356         u32 src_h = 1, dst_h = 1;
1357
1358         radeon_crtc->h_border = 0;
1359         radeon_crtc->v_border = 0;
1360
1361         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1362                 if (encoder->crtc != crtc)
1363                         continue;
1364                 radeon_encoder = to_radeon_encoder(encoder);
1365                 connector = radeon_get_connector_for_encoder(encoder);
1366                 radeon_connector = to_radeon_connector(connector);
1367
1368                 if (first) {
1369                         /* set scaling */
1370                         if (radeon_encoder->rmx_type == RMX_OFF)
1371                                 radeon_crtc->rmx_type = RMX_OFF;
1372                         else if (mode->hdisplay < radeon_encoder->native_mode.hdisplay ||
1373                                  mode->vdisplay < radeon_encoder->native_mode.vdisplay)
1374                                 radeon_crtc->rmx_type = radeon_encoder->rmx_type;
1375                         else
1376                                 radeon_crtc->rmx_type = RMX_OFF;
1377                         /* copy native mode */
1378                         memcpy(&radeon_crtc->native_mode,
1379                                &radeon_encoder->native_mode,
1380                                 sizeof(struct drm_display_mode));
1381                         src_v = crtc->mode.vdisplay;
1382                         dst_v = radeon_crtc->native_mode.vdisplay;
1383                         src_h = crtc->mode.hdisplay;
1384                         dst_h = radeon_crtc->native_mode.hdisplay;
1385
1386                         /* fix up for overscan on hdmi */
1387                         if (ASIC_IS_AVIVO(rdev) &&
1388                             (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
1389                             ((radeon_encoder->underscan_type == UNDERSCAN_ON) ||
1390                              ((radeon_encoder->underscan_type == UNDERSCAN_AUTO) &&
1391                               drm_detect_hdmi_monitor(radeon_connector->edid) &&
1392                               is_hdtv_mode(mode)))) {
1393                                 if (radeon_encoder->underscan_hborder != 0)
1394                                         radeon_crtc->h_border = radeon_encoder->underscan_hborder;
1395                                 else
1396                                         radeon_crtc->h_border = (mode->hdisplay >> 5) + 16;
1397                                 if (radeon_encoder->underscan_vborder != 0)
1398                                         radeon_crtc->v_border = radeon_encoder->underscan_vborder;
1399                                 else
1400                                         radeon_crtc->v_border = (mode->vdisplay >> 5) + 16;
1401                                 radeon_crtc->rmx_type = RMX_FULL;
1402                                 src_v = crtc->mode.vdisplay;
1403                                 dst_v = crtc->mode.vdisplay - (radeon_crtc->v_border * 2);
1404                                 src_h = crtc->mode.hdisplay;
1405                                 dst_h = crtc->mode.hdisplay - (radeon_crtc->h_border * 2);
1406                         }
1407                         first = false;
1408                 } else {
1409                         if (radeon_crtc->rmx_type != radeon_encoder->rmx_type) {
1410                                 /* WARNING: Right now this can't happen but
1411                                  * in the future we need to check that scaling
1412                                  * are consistent across different encoder
1413                                  * (ie all encoder can work with the same
1414                                  *  scaling).
1415                                  */
1416                                 DRM_ERROR("Scaling not consistent across encoder.\n");
1417                                 return false;
1418                         }
1419                 }
1420         }
1421         if (radeon_crtc->rmx_type != RMX_OFF) {
1422                 fixed20_12 a, b;
1423                 a.full = dfixed_const(src_v);
1424                 b.full = dfixed_const(dst_v);
1425                 radeon_crtc->vsc.full = dfixed_div(a, b);
1426                 a.full = dfixed_const(src_h);
1427                 b.full = dfixed_const(dst_h);
1428                 radeon_crtc->hsc.full = dfixed_div(a, b);
1429         } else {
1430                 radeon_crtc->vsc.full = dfixed_const(1);
1431                 radeon_crtc->hsc.full = dfixed_const(1);
1432         }
1433         return true;
1434 }
1435
1436 /*
1437  * Retrieve current video scanout position of crtc on a given gpu.
1438  *
1439  * \param dev Device to query.
1440  * \param crtc Crtc to query.
1441  * \param *vpos Location where vertical scanout position should be stored.
1442  * \param *hpos Location where horizontal scanout position should go.
1443  *
1444  * Returns vpos as a positive number while in active scanout area.
1445  * Returns vpos as a negative number inside vblank, counting the number
1446  * of scanlines to go until end of vblank, e.g., -1 means "one scanline
1447  * until start of active scanout / end of vblank."
1448  *
1449  * \return Flags, or'ed together as follows:
1450  *
1451  * DRM_SCANOUTPOS_VALID = Query successful.
1452  * DRM_SCANOUTPOS_INVBL = Inside vblank.
1453  * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
1454  * this flag means that returned position may be offset by a constant but
1455  * unknown small number of scanlines wrt. real scanout position.
1456  *
1457  */
1458 int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int *hpos)
1459 {
1460         u32 stat_crtc = 0, vbl = 0, position = 0;
1461         int vbl_start, vbl_end, vtotal, ret = 0;
1462         bool in_vbl = true;
1463
1464         struct radeon_device *rdev = dev->dev_private;
1465
1466         if (ASIC_IS_DCE4(rdev)) {
1467                 if (crtc == 0) {
1468                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1469                                      EVERGREEN_CRTC0_REGISTER_OFFSET);
1470                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1471                                           EVERGREEN_CRTC0_REGISTER_OFFSET);
1472                         ret |= DRM_SCANOUTPOS_VALID;
1473                 }
1474                 if (crtc == 1) {
1475                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1476                                      EVERGREEN_CRTC1_REGISTER_OFFSET);
1477                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1478                                           EVERGREEN_CRTC1_REGISTER_OFFSET);
1479                         ret |= DRM_SCANOUTPOS_VALID;
1480                 }
1481                 if (crtc == 2) {
1482                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1483                                      EVERGREEN_CRTC2_REGISTER_OFFSET);
1484                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1485                                           EVERGREEN_CRTC2_REGISTER_OFFSET);
1486                         ret |= DRM_SCANOUTPOS_VALID;
1487                 }
1488                 if (crtc == 3) {
1489                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1490                                      EVERGREEN_CRTC3_REGISTER_OFFSET);
1491                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1492                                           EVERGREEN_CRTC3_REGISTER_OFFSET);
1493                         ret |= DRM_SCANOUTPOS_VALID;
1494                 }
1495                 if (crtc == 4) {
1496                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1497                                      EVERGREEN_CRTC4_REGISTER_OFFSET);
1498                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1499                                           EVERGREEN_CRTC4_REGISTER_OFFSET);
1500                         ret |= DRM_SCANOUTPOS_VALID;
1501                 }
1502                 if (crtc == 5) {
1503                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1504                                      EVERGREEN_CRTC5_REGISTER_OFFSET);
1505                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1506                                           EVERGREEN_CRTC5_REGISTER_OFFSET);
1507                         ret |= DRM_SCANOUTPOS_VALID;
1508                 }
1509         } else if (ASIC_IS_AVIVO(rdev)) {
1510                 if (crtc == 0) {
1511                         vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END);
1512                         position = RREG32(AVIVO_D1CRTC_STATUS_POSITION);
1513                         ret |= DRM_SCANOUTPOS_VALID;
1514                 }
1515                 if (crtc == 1) {
1516                         vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END);
1517                         position = RREG32(AVIVO_D2CRTC_STATUS_POSITION);
1518                         ret |= DRM_SCANOUTPOS_VALID;
1519                 }
1520         } else {
1521                 /* Pre-AVIVO: Different encoding of scanout pos and vblank interval. */
1522                 if (crtc == 0) {
1523                         /* Assume vbl_end == 0, get vbl_start from
1524                          * upper 16 bits.
1525                          */
1526                         vbl = (RREG32(RADEON_CRTC_V_TOTAL_DISP) &
1527                                 RADEON_CRTC_V_DISP) >> RADEON_CRTC_V_DISP_SHIFT;
1528                         /* Only retrieve vpos from upper 16 bits, set hpos == 0. */
1529                         position = (RREG32(RADEON_CRTC_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL;
1530                         stat_crtc = RREG32(RADEON_CRTC_STATUS);
1531                         if (!(stat_crtc & 1))
1532                                 in_vbl = false;
1533
1534                         ret |= DRM_SCANOUTPOS_VALID;
1535                 }
1536                 if (crtc == 1) {
1537                         vbl = (RREG32(RADEON_CRTC2_V_TOTAL_DISP) &
1538                                 RADEON_CRTC_V_DISP) >> RADEON_CRTC_V_DISP_SHIFT;
1539                         position = (RREG32(RADEON_CRTC2_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL;
1540                         stat_crtc = RREG32(RADEON_CRTC2_STATUS);
1541                         if (!(stat_crtc & 1))
1542                                 in_vbl = false;
1543
1544                         ret |= DRM_SCANOUTPOS_VALID;
1545                 }
1546         }
1547
1548         /* Decode into vertical and horizontal scanout position. */
1549         *vpos = position & 0x1fff;
1550         *hpos = (position >> 16) & 0x1fff;
1551
1552         /* Valid vblank area boundaries from gpu retrieved? */
1553         if (vbl > 0) {
1554                 /* Yes: Decode. */
1555                 ret |= DRM_SCANOUTPOS_ACCURATE;
1556                 vbl_start = vbl & 0x1fff;
1557                 vbl_end = (vbl >> 16) & 0x1fff;
1558         }
1559         else {
1560                 /* No: Fake something reasonable which gives at least ok results. */
1561                 vbl_start = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vdisplay;
1562                 vbl_end = 0;
1563         }
1564
1565         /* Test scanout position against vblank region. */
1566         if ((*vpos < vbl_start) && (*vpos >= vbl_end))
1567                 in_vbl = false;
1568
1569         /* Check if inside vblank area and apply corrective offsets:
1570          * vpos will then be >=0 in video scanout area, but negative
1571          * within vblank area, counting down the number of lines until
1572          * start of scanout.
1573          */
1574
1575         /* Inside "upper part" of vblank area? Apply corrective offset if so: */
1576         if (in_vbl && (*vpos >= vbl_start)) {
1577                 vtotal = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vtotal;
1578                 *vpos = *vpos - vtotal;
1579         }
1580
1581         /* Correct for shifted end of vbl at vbl_end. */
1582         *vpos = *vpos - vbl_end;
1583
1584         /* In vblank? */
1585         if (in_vbl)
1586                 ret |= DRM_SCANOUTPOS_INVBL;
1587
1588         return ret;
1589 }