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 <drm/drmP.h>
  27 #include <drm/radeon_drm.h>
  28 #include "radeon.h"
  29
  30 #include "atom.h"
  31 #include <asm/div64.h>
  32
  33 #include <drm/drm_crtc_helper.h>
  34 #include <drm/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
 382         spin_lock(&rbo->tbo.bdev->fence_lock);
 383         if (rbo->tbo.sync_obj)
 384                 work->fence = radeon_fence_ref(rbo->tbo.sync_obj);
 385         spin_unlock(&rbo->tbo.bdev->fence_lock);
 386
 387         INIT_WORK(&work->work, radeon_unpin_work_func);
 388
 389         /* We borrow the event spin lock for protecting unpin_work */
 390         spin_lock_irqsave(&dev->event_lock, flags);
 391         if (radeon_crtc->unpin_work) {
 392                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
 393                 r = -EBUSY;
 394                 goto unlock_free;
 395         }
 396         radeon_crtc->unpin_work = work;
 397         radeon_crtc->deferred_flip_completion = 0;
 398         spin_unlock_irqrestore(&dev->event_lock, flags);
 399
 400         /* pin the new buffer */
 401         DRM_DEBUG_DRIVER("flip-ioctl() cur_fbo = %p, cur_bbo = %p\n",
 402                          work->old_rbo, rbo);
 403
 404         r = radeon_bo_reserve(rbo, false);
 405         if (unlikely(r != 0)) {
 406                 DRM_ERROR("failed to reserve new rbo buffer before flip\n");
 407                 goto pflip_cleanup;
 408         }
 409         /* Only 27 bit offset for legacy CRTC */
 410         r = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 411                                      ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27, &base);
 412         if (unlikely(r != 0)) {
 413                 radeon_bo_unreserve(rbo);
 414                 r = -EINVAL;
 415                 DRM_ERROR("failed to pin new rbo buffer before flip\n");
 416                 goto pflip_cleanup;
 417         }
 418         radeon_bo_get_tiling_flags(rbo, &tiling_flags, NULL);
 419         radeon_bo_unreserve(rbo);
 420
 421         if (!ASIC_IS_AVIVO(rdev)) {
 422                 /* crtc offset is from display base addr not FB location */
 423                 base -= radeon_crtc->legacy_display_base_addr;
 424                 pitch_pixels = fb->pitches[0] / (fb->bits_per_pixel / 8);
 425
 426                 if (tiling_flags & RADEON_TILING_MACRO) {
 427                         if (ASIC_IS_R300(rdev)) {
 428                                 base &= ~0x7ff;
 429                         } else {
 430                                 int byteshift = fb->bits_per_pixel >> 4;
 431                                 int tile_addr = (((crtc->y >> 3) * pitch_pixels +  crtc->x) >> (8 - byteshift)) << 11;
 432                                 base += tile_addr + ((crtc->x << byteshift) % 256) + ((crtc->y % 8) << 8);
 433                         }
 434                 } else {
 435                         int offset = crtc->y * pitch_pixels + crtc->x;
 436                         switch (fb->bits_per_pixel) {
 437                         case 8:
 438                         default:
 439                                 offset *= 1;
 440                                 break;
 441                         case 15:
 442                         case 16:
 443                                 offset *= 2;
 444                                 break;
 445                         case 24:
 446                                 offset *= 3;
 447                                 break;
 448                         case 32:
 449                                 offset *= 4;
 450                                 break;
 451                         }
 452                         base += offset;
 453                 }
 454                 base &= ~7;
 455         }
 456
 457         spin_lock_irqsave(&dev->event_lock, flags);
 458         work->new_crtc_base = base;
 459         spin_unlock_irqrestore(&dev->event_lock, flags);
 460
 461         /* update crtc fb */
 462         crtc->fb = fb;
 463
 464         r = drm_vblank_get(dev, radeon_crtc->crtc_id);
 465         if (r) {
 466                 DRM_ERROR("failed to get vblank before flip\n");
 467                 goto pflip_cleanup1;
 468         }
 469
 470         /* set the proper interrupt */
 471         radeon_pre_page_flip(rdev, radeon_crtc->crtc_id);
 472
 473         return 0;
 474
 475 pflip_cleanup1:
 476         if (unlikely(radeon_bo_reserve(rbo, false) != 0)) {
 477                 DRM_ERROR("failed to reserve new rbo in error path\n");
 478                 goto pflip_cleanup;
 479         }
 480         if (unlikely(radeon_bo_unpin(rbo) != 0)) {
 481                 DRM_ERROR("failed to unpin new rbo in error path\n");
 482         }
 483         radeon_bo_unreserve(rbo);
 484
 485 pflip_cleanup:
 486         spin_lock_irqsave(&dev->event_lock, flags);
 487         radeon_crtc->unpin_work = NULL;
 488 unlock_free:
 489         spin_unlock_irqrestore(&dev->event_lock, flags);
 490         drm_gem_object_unreference_unlocked(old_radeon_fb->obj);
 491         radeon_fence_unref(&work->fence);
 492         kfree(work);
 493
 494         return r;
 495 }
 496
 497 static const struct drm_crtc_funcs radeon_crtc_funcs = {
 498         .cursor_set = radeon_crtc_cursor_set,
 499         .cursor_move = radeon_crtc_cursor_move,
 500         .gamma_set = radeon_crtc_gamma_set,
 501         .set_config = drm_crtc_helper_set_config,
 502         .destroy = radeon_crtc_destroy,
 503         .page_flip = radeon_crtc_page_flip,
 504 };
 505
 506 static void radeon_crtc_init(struct drm_device *dev, int index)
 507 {
 508         struct radeon_device *rdev = dev->dev_private;
 509         struct radeon_crtc *radeon_crtc;
 510         int i;
 511
 512         radeon_crtc = kzalloc(sizeof(struct radeon_crtc) + (RADEONFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
 513         if (radeon_crtc == NULL)
 514                 return;
 515
 516         drm_crtc_init(dev, &radeon_crtc->base, &radeon_crtc_funcs);
 517
 518         drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256);
 519         radeon_crtc->crtc_id = index;
 520         rdev->mode_info.crtcs[index] = radeon_crtc;
 521
 522 #if 0
 523         radeon_crtc->mode_set.crtc = &radeon_crtc->base;
 524         radeon_crtc->mode_set.connectors = (struct drm_connector **)(radeon_crtc + 1);
 525         radeon_crtc->mode_set.num_connectors = 0;
 526 #endif
 527
 528         for (i = 0; i < 256; i++) {
 529                 radeon_crtc->lut_r[i] = i << 2;
 530                 radeon_crtc->lut_g[i] = i << 2;
 531                 radeon_crtc->lut_b[i] = i << 2;
 532         }
 533
 534         if (rdev->is_atom_bios && (ASIC_IS_AVIVO(rdev) || radeon_r4xx_atom))
 535                 radeon_atombios_init_crtc(dev, radeon_crtc);
 536         else
 537                 radeon_legacy_init_crtc(dev, radeon_crtc);
 538 }
 539
 540 static const char *encoder_names[37] = {
 541         "NONE",
 542         "INTERNAL_LVDS",
 543         "INTERNAL_TMDS1",
 544         "INTERNAL_TMDS2",
 545         "INTERNAL_DAC1",
 546         "INTERNAL_DAC2",
 547         "INTERNAL_SDVOA",
 548         "INTERNAL_SDVOB",
 549         "SI170B",
 550         "CH7303",
 551         "CH7301",
 552         "INTERNAL_DVO1",
 553         "EXTERNAL_SDVOA",
 554         "EXTERNAL_SDVOB",
 555         "TITFP513",
 556         "INTERNAL_LVTM1",
 557         "VT1623",
 558         "HDMI_SI1930",
 559         "HDMI_INTERNAL",
 560         "INTERNAL_KLDSCP_TMDS1",
 561         "INTERNAL_KLDSCP_DVO1",
 562         "INTERNAL_KLDSCP_DAC1",
 563         "INTERNAL_KLDSCP_DAC2",
 564         "SI178",
 565         "MVPU_FPGA",
 566         "INTERNAL_DDI",
 567         "VT1625",
 568         "HDMI_SI1932",
 569         "DP_AN9801",
 570         "DP_DP501",
 571         "INTERNAL_UNIPHY",
 572         "INTERNAL_KLDSCP_LVTMA",
 573         "INTERNAL_UNIPHY1",
 574         "INTERNAL_UNIPHY2",
 575         "NUTMEG",
 576         "TRAVIS",
 577         "INTERNAL_VCE"
 578 };
 579
 580 static const char *hpd_names[6] = {
 581         "HPD1",
 582         "HPD2",
 583         "HPD3",
 584         "HPD4",
 585         "HPD5",
 586         "HPD6",
 587 };
 588
 589 static void radeon_print_display_setup(struct drm_device *dev)
 590 {
 591         struct drm_connector *connector;
 592         struct radeon_connector *radeon_connector;
 593         struct drm_encoder *encoder;
 594         struct radeon_encoder *radeon_encoder;
 595         uint32_t devices;
 596         int i = 0;
 597
 598         DRM_INFO("Radeon Display Connectors\n");
 599         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 600                 radeon_connector = to_radeon_connector(connector);
 601                 DRM_INFO("Connector %d:\n", i);
 602                 DRM_INFO("  %s\n", drm_get_connector_name(connector));
 603                 if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)
 604                         DRM_INFO("  %s\n", hpd_names[radeon_connector->hpd.hpd]);
 605                 if (radeon_connector->ddc_bus) {
 606                         DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
 607                                  radeon_connector->ddc_bus->rec.mask_clk_reg,
 608                                  radeon_connector->ddc_bus->rec.mask_data_reg,
 609                                  radeon_connector->ddc_bus->rec.a_clk_reg,
 610                                  radeon_connector->ddc_bus->rec.a_data_reg,
 611                                  radeon_connector->ddc_bus->rec.en_clk_reg,
 612                                  radeon_connector->ddc_bus->rec.en_data_reg,
 613                                  radeon_connector->ddc_bus->rec.y_clk_reg,
 614                                  radeon_connector->ddc_bus->rec.y_data_reg);
 615                         if (radeon_connector->router.ddc_valid)
 616                                 DRM_INFO("  DDC Router 0x%x/0x%x\n",
 617                                          radeon_connector->router.ddc_mux_control_pin,
 618                                          radeon_connector->router.ddc_mux_state);
 619                         if (radeon_connector->router.cd_valid)
 620                                 DRM_INFO("  Clock/Data Router 0x%x/0x%x\n",
 621                                          radeon_connector->router.cd_mux_control_pin,
 622                                          radeon_connector->router.cd_mux_state);
 623                 } else {
 624                         if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
 625                             connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
 626                             connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
 627                             connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
 628                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
 629                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
 630                                 DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");
 631                 }
 632                 DRM_INFO("  Encoders:\n");
 633                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 634                         radeon_encoder = to_radeon_encoder(encoder);
 635                         devices = radeon_encoder->devices & radeon_connector->devices;
 636                         if (devices) {
 637                                 if (devices & ATOM_DEVICE_CRT1_SUPPORT)
 638                                         DRM_INFO("    CRT1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 639                                 if (devices & ATOM_DEVICE_CRT2_SUPPORT)
 640                                         DRM_INFO("    CRT2: %s\n", encoder_names[radeon_encoder->encoder_id]);
 641                                 if (devices & ATOM_DEVICE_LCD1_SUPPORT)
 642                                         DRM_INFO("    LCD1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 643                                 if (devices & ATOM_DEVICE_DFP1_SUPPORT)
 644                                         DRM_INFO("    DFP1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 645                                 if (devices & ATOM_DEVICE_DFP2_SUPPORT)
 646                                         DRM_INFO("    DFP2: %s\n", encoder_names[radeon_encoder->encoder_id]);
 647                                 if (devices & ATOM_DEVICE_DFP3_SUPPORT)
 648                                         DRM_INFO("    DFP3: %s\n", encoder_names[radeon_encoder->encoder_id]);
 649                                 if (devices & ATOM_DEVICE_DFP4_SUPPORT)
 650                                         DRM_INFO("    DFP4: %s\n", encoder_names[radeon_encoder->encoder_id]);
 651                                 if (devices & ATOM_DEVICE_DFP5_SUPPORT)
 652                                         DRM_INFO("    DFP5: %s\n", encoder_names[radeon_encoder->encoder_id]);
 653                                 if (devices & ATOM_DEVICE_DFP6_SUPPORT)
 654                                         DRM_INFO("    DFP6: %s\n", encoder_names[radeon_encoder->encoder_id]);
 655                                 if (devices & ATOM_DEVICE_TV1_SUPPORT)
 656                                         DRM_INFO("    TV1: %s\n", encoder_names[radeon_encoder->encoder_id]);
 657                                 if (devices & ATOM_DEVICE_CV_SUPPORT)
 658                                         DRM_INFO("    CV: %s\n", encoder_names[radeon_encoder->encoder_id]);
 659                         }
 660                 }
 661                 i++;
 662         }
 663 }
 664
 665 static bool radeon_setup_enc_conn(struct drm_device *dev)
 666 {
 667         struct radeon_device *rdev = dev->dev_private;
 668         bool ret = false;
 669
 670         if (rdev->bios) {
 671                 if (rdev->is_atom_bios) {
 672                         ret = radeon_get_atom_connector_info_from_supported_devices_table(dev);
 673                         if (ret == false)
 674                                 ret = radeon_get_atom_connector_info_from_object_table(dev);
 675                 } else {
 676                         ret = radeon_get_legacy_connector_info_from_bios(dev);
 677                         if (ret == false)
 678                                 ret = radeon_get_legacy_connector_info_from_table(dev);
 679                 }
 680         } else {
 681                 if (!ASIC_IS_AVIVO(rdev))
 682                         ret = radeon_get_legacy_connector_info_from_table(dev);
 683         }
 684         if (ret) {
 685                 radeon_setup_encoder_clones(dev);
 686                 radeon_print_display_setup(dev);
 687         }
 688
 689         return ret;
 690 }
 691
 692 int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 693 {
 694         struct drm_device *dev = radeon_connector->base.dev;
 695         struct radeon_device *rdev = dev->dev_private;
 696         int ret = 0;
 697
 698         /* on hw with routers, select right port */
 699         if (radeon_connector->router.ddc_valid)
 700                 radeon_router_select_ddc_port(radeon_connector);
 701
 702         if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
 703             (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) ||
 704             (radeon_connector_encoder_get_dp_bridge_encoder_id(&radeon_connector->base) !=
 705              ENCODER_OBJECT_ID_NONE)) {
 706                 struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
 707
 708                 if ((dig->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT ||
 709                      dig->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) && dig->dp_i2c_bus)
 710                         radeon_connector->edid = drm_get_edid(&radeon_connector->base,
 711                                                               &dig->dp_i2c_bus->adapter);
 712                 else if (radeon_connector->ddc_bus && !radeon_connector->edid)
 713                         radeon_connector->edid = drm_get_edid(&radeon_connector->base,
 714                                                               &radeon_connector->ddc_bus->adapter);
 715         } else {
 716                 if (radeon_connector->ddc_bus && !radeon_connector->edid)
 717                         radeon_connector->edid = drm_get_edid(&radeon_connector->base,
 718                                                               &radeon_connector->ddc_bus->adapter);
 719         }
 720
 721         if (!radeon_connector->edid) {
 722                 if (rdev->is_atom_bios) {
 723                         /* some laptops provide a hardcoded edid in rom for LCDs */
 724                         if (((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_LVDS) ||
 725                              (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)))
 726                                 radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
 727                 } else
 728                         /* some servers provide a hardcoded edid in rom for KVMs */
 729                         radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
 730         }
 731         if (radeon_connector->edid) {
 732                 drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
 733                 ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
 734                 return ret;
 735         }
 736         drm_mode_connector_update_edid_property(&radeon_connector->base, NULL);
 737         return 0;
 738 }
 739
 740 /* avivo */
 741 static void avivo_get_fb_div(struct radeon_pll *pll,
 742                              u32 target_clock,
 743                              u32 post_div,
 744                              u32 ref_div,
 745                              u32 *fb_div,
 746                              u32 *frac_fb_div)
 747 {
 748         u32 tmp = post_div * ref_div;
 749
 750         tmp *= target_clock;
 751         *fb_div = tmp / pll->reference_freq;
 752         *frac_fb_div = tmp % pll->reference_freq;
 753
 754         if (*fb_div > pll->max_feedback_div)
 755                 *fb_div = pll->max_feedback_div;
 756         else if (*fb_div < pll->min_feedback_div)
 757                 *fb_div = pll->min_feedback_div;
 758 }
 759
 760 static u32 avivo_get_post_div(struct radeon_pll *pll,
 761                               u32 target_clock)
 762 {
 763         u32 vco, post_div, tmp;
 764
 765         if (pll->flags & RADEON_PLL_USE_POST_DIV)
 766                 return pll->post_div;
 767
 768         if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP) {
 769                 if (pll->flags & RADEON_PLL_IS_LCD)
 770                         vco = pll->lcd_pll_out_min;
 771                 else
 772                         vco = pll->pll_out_min;
 773         } else {
 774                 if (pll->flags & RADEON_PLL_IS_LCD)
 775                         vco = pll->lcd_pll_out_max;
 776                 else
 777                         vco = pll->pll_out_max;
 778         }
 779
 780         post_div = vco / target_clock;
 781         tmp = vco % target_clock;
 782
 783         if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP) {
 784                 if (tmp)
 785                         post_div++;
 786         } else {
 787                 if (!tmp)
 788                         post_div--;
 789         }
 790
 791         if (post_div > pll->max_post_div)
 792                 post_div = pll->max_post_div;
 793         else if (post_div < pll->min_post_div)
 794                 post_div = pll->min_post_div;
 795
 796         return post_div;
 797 }
 798
 799 #define MAX_TOLERANCE 10
 800
 801 void radeon_compute_pll_avivo(struct radeon_pll *pll,
 802                               u32 freq,
 803                               u32 *dot_clock_p,
 804                               u32 *fb_div_p,
 805                               u32 *frac_fb_div_p,
 806                               u32 *ref_div_p,
 807                               u32 *post_div_p)
 808 {
 809         u32 target_clock = freq / 10;
 810         u32 post_div = avivo_get_post_div(pll, target_clock);
 811         u32 ref_div = pll->min_ref_div;
 812         u32 fb_div = 0, frac_fb_div = 0, tmp;
 813
 814         if (pll->flags & RADEON_PLL_USE_REF_DIV)
 815                 ref_div = pll->reference_div;
 816
 817         if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
 818                 avivo_get_fb_div(pll, target_clock, post_div, ref_div, &fb_div, &frac_fb_div);
 819                 frac_fb_div = (100 * frac_fb_div) / pll->reference_freq;
 820                 if (frac_fb_div >= 5) {
 821                         frac_fb_div -= 5;
 822                         frac_fb_div = frac_fb_div / 10;
 823                         frac_fb_div++;
 824                 }
 825                 if (frac_fb_div >= 10) {
 826                         fb_div++;
 827                         frac_fb_div = 0;
 828                 }
 829         } else {
 830                 while (ref_div <= pll->max_ref_div) {
 831                         avivo_get_fb_div(pll, target_clock, post_div, ref_div,
 832                                          &fb_div, &frac_fb_div);
 833                         if (frac_fb_div >= (pll->reference_freq / 2))
 834                                 fb_div++;
 835                         frac_fb_div = 0;
 836                         tmp = (pll->reference_freq * fb_div) / (post_div * ref_div);
 837                         tmp = (tmp * 10000) / target_clock;
 838
 839                         if (tmp > (10000 + MAX_TOLERANCE))
 840                                 ref_div++;
 841                         else if (tmp >= (10000 - MAX_TOLERANCE))
 842                                 break;
 843                         else
 844                                 ref_div++;
 845                 }
 846         }
 847
 848         *dot_clock_p = ((pll->reference_freq * fb_div * 10) + (pll->reference_freq * frac_fb_div)) /
 849                 (ref_div * post_div * 10);
 850         *fb_div_p = fb_div;
 851         *frac_fb_div_p = frac_fb_div;
 852         *ref_div_p = ref_div;
 853         *post_div_p = post_div;
 854         DRM_DEBUG_KMS("%d, pll dividers - fb: %d.%d ref: %d, post %d\n",
 855                       *dot_clock_p, fb_div, frac_fb_div, ref_div, post_div);
 856 }
 857
 858 /* pre-avivo */
 859 static inline uint32_t radeon_div(uint64_t n, uint32_t d)
 860 {
 861         uint64_t mod;
 862
 863         n += d / 2;
 864
 865         mod = do_div(n, d);
 866         return n;
 867 }
 868
 869 void radeon_compute_pll_legacy(struct radeon_pll *pll,
 870                                uint64_t freq,
 871                                uint32_t *dot_clock_p,
 872                                uint32_t *fb_div_p,
 873                                uint32_t *frac_fb_div_p,
 874                                uint32_t *ref_div_p,
 875                                uint32_t *post_div_p)
 876 {
 877         uint32_t min_ref_div = pll->min_ref_div;
 878         uint32_t max_ref_div = pll->max_ref_div;
 879         uint32_t min_post_div = pll->min_post_div;
 880         uint32_t max_post_div = pll->max_post_div;
 881         uint32_t min_fractional_feed_div = 0;
 882         uint32_t max_fractional_feed_div = 0;
 883         uint32_t best_vco = pll->best_vco;
 884         uint32_t best_post_div = 1;
 885         uint32_t best_ref_div = 1;
 886         uint32_t best_feedback_div = 1;
 887         uint32_t best_frac_feedback_div = 0;
 888         uint32_t best_freq = -1;
 889         uint32_t best_error = 0xffffffff;
 890         uint32_t best_vco_diff = 1;
 891         uint32_t post_div;
 892         u32 pll_out_min, pll_out_max;
 893
 894         DRM_DEBUG_KMS("PLL freq %llu %u %u\n", freq, pll->min_ref_div, pll->max_ref_div);
 895         freq = freq * 1000;
 896
 897         if (pll->flags & RADEON_PLL_IS_LCD) {
 898                 pll_out_min = pll->lcd_pll_out_min;
 899                 pll_out_max = pll->lcd_pll_out_max;
 900         } else {
 901                 pll_out_min = pll->pll_out_min;
 902                 pll_out_max = pll->pll_out_max;
 903         }
 904
 905         if (pll_out_min > 64800)
 906                 pll_out_min = 64800;
 907
 908         if (pll->flags & RADEON_PLL_USE_REF_DIV)
 909                 min_ref_div = max_ref_div = pll->reference_div;
 910         else {
 911                 while (min_ref_div < max_ref_div-1) {
 912                         uint32_t mid = (min_ref_div + max_ref_div) / 2;
 913                         uint32_t pll_in = pll->reference_freq / mid;
 914                         if (pll_in < pll->pll_in_min)
 915                                 max_ref_div = mid;
 916                         else if (pll_in > pll->pll_in_max)
 917                                 min_ref_div = mid;
 918                         else
 919                                 break;
 920                 }
 921         }
 922
 923         if (pll->flags & RADEON_PLL_USE_POST_DIV)
 924                 min_post_div = max_post_div = pll->post_div;
 925
 926         if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
 927                 min_fractional_feed_div = pll->min_frac_feedback_div;
 928                 max_fractional_feed_div = pll->max_frac_feedback_div;
 929         }
 930
 931         for (post_div = max_post_div; post_div >= min_post_div; --post_div) {
 932                 uint32_t ref_div;
 933
 934                 if ((pll->flags & RADEON_PLL_NO_ODD_POST_DIV) && (post_div & 1))
 935                         continue;
 936
 937                 /* legacy radeons only have a few post_divs */
 938                 if (pll->flags & RADEON_PLL_LEGACY) {
 939                         if ((post_div == 5) ||
 940                             (post_div == 7) ||
 941                             (post_div == 9) ||
 942                             (post_div == 10) ||
 943                             (post_div == 11) ||
 944                             (post_div == 13) ||
 945                             (post_div == 14) ||
 946                             (post_div == 15))
 947                                 continue;
 948                 }
 949
 950                 for (ref_div = min_ref_div; ref_div <= max_ref_div; ++ref_div) {
 951                         uint32_t feedback_div, current_freq = 0, error, vco_diff;
 952                         uint32_t pll_in = pll->reference_freq / ref_div;
 953                         uint32_t min_feed_div = pll->min_feedback_div;
 954                         uint32_t max_feed_div = pll->max_feedback_div + 1;
 955
 956                         if (pll_in < pll->pll_in_min || pll_in > pll->pll_in_max)
 957                                 continue;
 958
 959                         while (min_feed_div < max_feed_div) {
 960                                 uint32_t vco;
 961                                 uint32_t min_frac_feed_div = min_fractional_feed_div;
 962                                 uint32_t max_frac_feed_div = max_fractional_feed_div + 1;
 963                                 uint32_t frac_feedback_div;
 964                                 uint64_t tmp;
 965
 966                                 feedback_div = (min_feed_div + max_feed_div) / 2;
 967
 968                                 tmp = (uint64_t)pll->reference_freq * feedback_div;
 969                                 vco = radeon_div(tmp, ref_div);
 970
 971                                 if (vco < pll_out_min) {
 972                                         min_feed_div = feedback_div + 1;
 973                                         continue;
 974                                 } else if (vco > pll_out_max) {
 975                                         max_feed_div = feedback_div;
 976                                         continue;
 977                                 }
 978
 979                                 while (min_frac_feed_div < max_frac_feed_div) {
 980                                         frac_feedback_div = (min_frac_feed_div + max_frac_feed_div) / 2;
 981                                         tmp = (uint64_t)pll->reference_freq * 10000 * feedback_div;
 982                                         tmp += (uint64_t)pll->reference_freq * 1000 * frac_feedback_div;
 983                                         current_freq = radeon_div(tmp, ref_div * post_div);
 984
 985                                         if (pll->flags & RADEON_PLL_PREFER_CLOSEST_LOWER) {
 986                                                 if (freq < current_freq)
 987                                                         error = 0xffffffff;
 988                                                 else
 989                                                         error = freq - current_freq;
 990                                         } else
 991                                                 error = abs(current_freq - freq);
 992                                         vco_diff = abs(vco - best_vco);
 993
 994                                         if ((best_vco == 0 && error < best_error) ||
 995                                             (best_vco != 0 &&
 996                                              ((best_error > 100 && error < best_error - 100) ||
 997                                               (abs(error - best_error) < 100 && vco_diff < best_vco_diff)))) {
 998                                                 best_post_div = post_div;
 999                                                 best_ref_div = ref_div;
1000                                                 best_feedback_div = feedback_div;
1001                                                 best_frac_feedback_div = frac_feedback_div;
1002                                                 best_freq = current_freq;
1003                                                 best_error = error;
1004                                                 best_vco_diff = vco_diff;
1005                                         } else if (current_freq == freq) {
1006                                                 if (best_freq == -1) {
1007                                                         best_post_div = post_div;
1008                                                         best_ref_div = ref_div;
1009                                                         best_feedback_div = feedback_div;
1010                                                         best_frac_feedback_div = frac_feedback_div;
1011                                                         best_freq = current_freq;
1012                                                         best_error = error;
1013                                                         best_vco_diff = vco_diff;
1014                                                 } else if (((pll->flags & RADEON_PLL_PREFER_LOW_REF_DIV) && (ref_div < best_ref_div)) ||
1015                                                            ((pll->flags & RADEON_PLL_PREFER_HIGH_REF_DIV) && (ref_div > best_ref_div)) ||
1016                                                            ((pll->flags & RADEON_PLL_PREFER_LOW_FB_DIV) && (feedback_div < best_feedback_div)) ||
1017                                                            ((pll->flags & RADEON_PLL_PREFER_HIGH_FB_DIV) && (feedback_div > best_feedback_div)) ||
1018                                                            ((pll->flags & RADEON_PLL_PREFER_LOW_POST_DIV) && (post_div < best_post_div)) ||
1019                                                            ((pll->flags & RADEON_PLL_PREFER_HIGH_POST_DIV) && (post_div > best_post_div))) {
1020                                                         best_post_div = post_div;
1021                                                         best_ref_div = ref_div;
1022                                                         best_feedback_div = feedback_div;
1023                                                         best_frac_feedback_div = frac_feedback_div;
1024                                                         best_freq = current_freq;
1025                                                         best_error = error;
1026                                                         best_vco_diff = vco_diff;
1027                                                 }
1028                                         }
1029                                         if (current_freq < freq)
1030                                                 min_frac_feed_div = frac_feedback_div + 1;
1031                                         else
1032                                                 max_frac_feed_div = frac_feedback_div;
1033                                 }
1034                                 if (current_freq < freq)
1035                                         min_feed_div = feedback_div + 1;
1036                                 else
1037                                         max_feed_div = feedback_div;
1038                         }
1039                 }
1040         }
1041
1042         *dot_clock_p = best_freq / 10000;
1043         *fb_div_p = best_feedback_div;
1044         *frac_fb_div_p = best_frac_feedback_div;
1045         *ref_div_p = best_ref_div;
1046         *post_div_p = best_post_div;
1047         DRM_DEBUG_KMS("%lld %d, pll dividers - fb: %d.%d ref: %d, post %d\n",
1048                       (long long)freq,
1049                       best_freq / 1000, best_feedback_div, best_frac_feedback_div,
1050                       best_ref_div, best_post_div);
1051
1052 }
1053
1054 static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb)
1055 {
1056         struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);
1057
1058         if (radeon_fb->obj) {
1059                 drm_gem_object_unreference_unlocked(radeon_fb->obj);
1060         }
1061         drm_framebuffer_cleanup(fb);
1062         kfree(radeon_fb);
1063 }
1064
1065 static int radeon_user_framebuffer_create_handle(struct drm_framebuffer *fb,
1066                                                   struct drm_file *file_priv,
1067                                                   unsigned int *handle)
1068 {
1069         struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);
1070
1071         return drm_gem_handle_create(file_priv, radeon_fb->obj, handle);
1072 }
1073
1074 static const struct drm_framebuffer_funcs radeon_fb_funcs = {
1075         .destroy = radeon_user_framebuffer_destroy,
1076         .create_handle = radeon_user_framebuffer_create_handle,
1077 };
1078
1079 int
1080 radeon_framebuffer_init(struct drm_device *dev,
1081                         struct radeon_framebuffer *rfb,
1082                         struct drm_mode_fb_cmd2 *mode_cmd,
1083                         struct drm_gem_object *obj)
1084 {
1085         int ret;
1086         rfb->obj = obj;
1087         ret = drm_framebuffer_init(dev, &rfb->base, &radeon_fb_funcs);
1088         if (ret) {
1089                 rfb->obj = NULL;
1090                 return ret;
1091         }
1092         drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
1093         return 0;
1094 }
1095
1096 static struct drm_framebuffer *
1097 radeon_user_framebuffer_create(struct drm_device *dev,
1098                                struct drm_file *file_priv,
1099                                struct drm_mode_fb_cmd2 *mode_cmd)
1100 {
1101         struct drm_gem_object *obj;
1102         struct radeon_framebuffer *radeon_fb;
1103         int ret;
1104
1105         obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
1106         if (obj ==  NULL) {
1107                 dev_err(&dev->pdev->dev, "No GEM object associated to handle 0x%08X, "
1108                         "can't create framebuffer\n", mode_cmd->handles[0]);
1109                 return ERR_PTR(-ENOENT);
1110         }
1111
1112         radeon_fb = kzalloc(sizeof(*radeon_fb), GFP_KERNEL);
1113         if (radeon_fb == NULL)
1114                 return ERR_PTR(-ENOMEM);
1115
1116         ret = radeon_framebuffer_init(dev, radeon_fb, mode_cmd, obj);
1117         if (ret) {
1118                 kfree(radeon_fb);
1119                 drm_gem_object_unreference_unlocked(obj);
1120                 return NULL;
1121         }
1122
1123         return &radeon_fb->base;
1124 }
1125
1126 static void radeon_output_poll_changed(struct drm_device *dev)
1127 {
1128         struct radeon_device *rdev = dev->dev_private;
1129         radeon_fb_output_poll_changed(rdev);
1130 }
1131
1132 static const struct drm_mode_config_funcs radeon_mode_funcs = {
1133         .fb_create = radeon_user_framebuffer_create,
1134         .output_poll_changed = radeon_output_poll_changed
1135 };
1136
1137 static struct drm_prop_enum_list radeon_tmds_pll_enum_list[] =
1138 {       { 0, "driver" },
1139         { 1, "bios" },
1140 };
1141
1142 static struct drm_prop_enum_list radeon_tv_std_enum_list[] =
1143 {       { TV_STD_NTSC, "ntsc" },
1144         { TV_STD_PAL, "pal" },
1145         { TV_STD_PAL_M, "pal-m" },
1146         { TV_STD_PAL_60, "pal-60" },
1147         { TV_STD_NTSC_J, "ntsc-j" },
1148         { TV_STD_SCART_PAL, "scart-pal" },
1149         { TV_STD_PAL_CN, "pal-cn" },
1150         { TV_STD_SECAM, "secam" },
1151 };
1152
1153 static struct drm_prop_enum_list radeon_underscan_enum_list[] =
1154 {       { UNDERSCAN_OFF, "off" },
1155         { UNDERSCAN_ON, "on" },
1156         { UNDERSCAN_AUTO, "auto" },
1157 };
1158
1159 static int radeon_modeset_create_props(struct radeon_device *rdev)
1160 {
1161         int sz;
1162
1163         if (rdev->is_atom_bios) {
1164                 rdev->mode_info.coherent_mode_property =
1165                         drm_property_create_range(rdev->ddev, 0 , "coherent", 0, 1);
1166                 if (!rdev->mode_info.coherent_mode_property)
1167                         return -ENOMEM;
1168         }
1169
1170         if (!ASIC_IS_AVIVO(rdev)) {
1171                 sz = ARRAY_SIZE(radeon_tmds_pll_enum_list);
1172                 rdev->mode_info.tmds_pll_property =
1173                         drm_property_create_enum(rdev->ddev, 0,
1174                                             "tmds_pll",
1175                                             radeon_tmds_pll_enum_list, sz);
1176         }
1177
1178         rdev->mode_info.load_detect_property =
1179                 drm_property_create_range(rdev->ddev, 0, "load detection", 0, 1);
1180         if (!rdev->mode_info.load_detect_property)
1181                 return -ENOMEM;
1182
1183         drm_mode_create_scaling_mode_property(rdev->ddev);
1184
1185         sz = ARRAY_SIZE(radeon_tv_std_enum_list);
1186         rdev->mode_info.tv_std_property =
1187                 drm_property_create_enum(rdev->ddev, 0,
1188                                     "tv standard",
1189                                     radeon_tv_std_enum_list, sz);
1190
1191         sz = ARRAY_SIZE(radeon_underscan_enum_list);
1192         rdev->mode_info.underscan_property =
1193                 drm_property_create_enum(rdev->ddev, 0,
1194                                     "underscan",
1195                                     radeon_underscan_enum_list, sz);
1196
1197         rdev->mode_info.underscan_hborder_property =
1198                 drm_property_create_range(rdev->ddev, 0,
1199                                         "underscan hborder", 0, 128);
1200         if (!rdev->mode_info.underscan_hborder_property)
1201                 return -ENOMEM;
1202
1203         rdev->mode_info.underscan_vborder_property =
1204                 drm_property_create_range(rdev->ddev, 0,
1205                                         "underscan vborder", 0, 128);
1206         if (!rdev->mode_info.underscan_vborder_property)
1207                 return -ENOMEM;
1208
1209         return 0;
1210 }
1211
1212 void radeon_update_display_priority(struct radeon_device *rdev)
1213 {
1214         /* adjustment options for the display watermarks */
1215         if ((radeon_disp_priority == 0) || (radeon_disp_priority > 2)) {
1216                 /* set display priority to high for r3xx, rv515 chips
1217                  * this avoids flickering due to underflow to the
1218                  * display controllers during heavy acceleration.
1219                  * Don't force high on rs4xx igp chips as it seems to
1220                  * affect the sound card.  See kernel bug 15982.
1221                  */
1222                 if ((ASIC_IS_R300(rdev) || (rdev->family == CHIP_RV515)) &&
1223                     !(rdev->flags & RADEON_IS_IGP))
1224                         rdev->disp_priority = 2;
1225                 else
1226                         rdev->disp_priority = 0;
1227         } else
1228                 rdev->disp_priority = radeon_disp_priority;
1229
1230 }
1231
1232 /*
1233  * Allocate hdmi structs and determine register offsets
1234  */
1235 static void radeon_afmt_init(struct radeon_device *rdev)
1236 {
1237         int i;
1238
1239         for (i = 0; i < RADEON_MAX_AFMT_BLOCKS; i++)
1240                 rdev->mode_info.afmt[i] = NULL;
1241
1242         if (ASIC_IS_DCE6(rdev)) {
1243                 /* todo */
1244         } else if (ASIC_IS_DCE4(rdev)) {
1245                 /* DCE4/5 has 6 audio blocks tied to DIG encoders */
1246                 /* DCE4.1 has 2 audio blocks tied to DIG encoders */
1247                 rdev->mode_info.afmt[0] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1248                 if (rdev->mode_info.afmt[0]) {
1249                         rdev->mode_info.afmt[0]->offset = EVERGREEN_CRTC0_REGISTER_OFFSET;
1250                         rdev->mode_info.afmt[0]->id = 0;
1251                 }
1252                 rdev->mode_info.afmt[1] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1253                 if (rdev->mode_info.afmt[1]) {
1254                         rdev->mode_info.afmt[1]->offset = EVERGREEN_CRTC1_REGISTER_OFFSET;
1255                         rdev->mode_info.afmt[1]->id = 1;
1256                 }
1257                 if (!ASIC_IS_DCE41(rdev)) {
1258                         rdev->mode_info.afmt[2] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1259                         if (rdev->mode_info.afmt[2]) {
1260                                 rdev->mode_info.afmt[2]->offset = EVERGREEN_CRTC2_REGISTER_OFFSET;
1261                                 rdev->mode_info.afmt[2]->id = 2;
1262                         }
1263                         rdev->mode_info.afmt[3] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1264                         if (rdev->mode_info.afmt[3]) {
1265                                 rdev->mode_info.afmt[3]->offset = EVERGREEN_CRTC3_REGISTER_OFFSET;
1266                                 rdev->mode_info.afmt[3]->id = 3;
1267                         }
1268                         rdev->mode_info.afmt[4] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1269                         if (rdev->mode_info.afmt[4]) {
1270                                 rdev->mode_info.afmt[4]->offset = EVERGREEN_CRTC4_REGISTER_OFFSET;
1271                                 rdev->mode_info.afmt[4]->id = 4;
1272                         }
1273                         rdev->mode_info.afmt[5] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1274                         if (rdev->mode_info.afmt[5]) {
1275                                 rdev->mode_info.afmt[5]->offset = EVERGREEN_CRTC5_REGISTER_OFFSET;
1276                                 rdev->mode_info.afmt[5]->id = 5;
1277                         }
1278                 }
1279         } else if (ASIC_IS_DCE3(rdev)) {
1280                 /* DCE3.x has 2 audio blocks tied to DIG encoders */
1281                 rdev->mode_info.afmt[0] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1282                 if (rdev->mode_info.afmt[0]) {
1283                         rdev->mode_info.afmt[0]->offset = DCE3_HDMI_OFFSET0;
1284                         rdev->mode_info.afmt[0]->id = 0;
1285                 }
1286                 rdev->mode_info.afmt[1] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1287                 if (rdev->mode_info.afmt[1]) {
1288                         rdev->mode_info.afmt[1]->offset = DCE3_HDMI_OFFSET1;
1289                         rdev->mode_info.afmt[1]->id = 1;
1290                 }
1291         } else if (ASIC_IS_DCE2(rdev)) {
1292                 /* DCE2 has at least 1 routable audio block */
1293                 rdev->mode_info.afmt[0] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1294                 if (rdev->mode_info.afmt[0]) {
1295                         rdev->mode_info.afmt[0]->offset = DCE2_HDMI_OFFSET0;
1296                         rdev->mode_info.afmt[0]->id = 0;
1297                 }
1298                 /* r6xx has 2 routable audio blocks */
1299                 if (rdev->family >= CHIP_R600) {
1300                         rdev->mode_info.afmt[1] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
1301                         if (rdev->mode_info.afmt[1]) {
1302                                 rdev->mode_info.afmt[1]->offset = DCE2_HDMI_OFFSET1;
1303                                 rdev->mode_info.afmt[1]->id = 1;
1304                         }
1305                 }
1306         }
1307 }
1308
1309 static void radeon_afmt_fini(struct radeon_device *rdev)
1310 {
1311         int i;
1312
1313         for (i = 0; i < RADEON_MAX_AFMT_BLOCKS; i++) {
1314                 kfree(rdev->mode_info.afmt[i]);
1315                 rdev->mode_info.afmt[i] = NULL;
1316         }
1317 }
1318
1319 int radeon_modeset_init(struct radeon_device *rdev)
1320 {
1321         int i;
1322         int ret;
1323
1324         drm_mode_config_init(rdev->ddev);
1325         rdev->mode_info.mode_config_initialized = true;
1326
1327         rdev->ddev->mode_config.funcs = &radeon_mode_funcs;
1328
1329         if (ASIC_IS_DCE5(rdev)) {
1330                 rdev->ddev->mode_config.max_width = 16384;
1331                 rdev->ddev->mode_config.max_height = 16384;
1332         } else if (ASIC_IS_AVIVO(rdev)) {
1333                 rdev->ddev->mode_config.max_width = 8192;
1334                 rdev->ddev->mode_config.max_height = 8192;
1335         } else {
1336                 rdev->ddev->mode_config.max_width = 4096;
1337                 rdev->ddev->mode_config.max_height = 4096;
1338         }
1339
1340         rdev->ddev->mode_config.preferred_depth = 24;
1341         rdev->ddev->mode_config.prefer_shadow = 1;
1342
1343         rdev->ddev->mode_config.fb_base = rdev->mc.aper_base;
1344
1345         ret = radeon_modeset_create_props(rdev);
1346         if (ret) {
1347                 return ret;
1348         }
1349
1350         /* init i2c buses */
1351         radeon_i2c_init(rdev);
1352
1353         /* check combios for a valid hardcoded EDID - Sun servers */
1354         if (!rdev->is_atom_bios) {
1355                 /* check for hardcoded EDID in BIOS */
1356                 radeon_combios_check_hardcoded_edid(rdev);
1357         }
1358
1359         /* allocate crtcs */
1360         for (i = 0; i < rdev->num_crtc; i++) {
1361                 radeon_crtc_init(rdev->ddev, i);
1362         }
1363
1364         /* okay we should have all the bios connectors */
1365         ret = radeon_setup_enc_conn(rdev->ddev);
1366         if (!ret) {
1367                 return ret;
1368         }
1369
1370         /* init dig PHYs, disp eng pll */
1371         if (rdev->is_atom_bios) {
1372                 radeon_atom_encoder_init(rdev);
1373                 radeon_atom_disp_eng_pll_init(rdev);
1374         }
1375
1376         /* initialize hpd */
1377         radeon_hpd_init(rdev);
1378
1379         /* setup afmt */
1380         radeon_afmt_init(rdev);
1381
1382         /* Initialize power management */
1383         radeon_pm_init(rdev);
1384
1385         radeon_fbdev_init(rdev);
1386         drm_kms_helper_poll_init(rdev->ddev);
1387
1388         return 0;
1389 }
1390
1391 void radeon_modeset_fini(struct radeon_device *rdev)
1392 {
1393         radeon_fbdev_fini(rdev);
1394         kfree(rdev->mode_info.bios_hardcoded_edid);
1395         radeon_pm_fini(rdev);
1396
1397         if (rdev->mode_info.mode_config_initialized) {
1398                 radeon_afmt_fini(rdev);
1399                 drm_kms_helper_poll_fini(rdev->ddev);
1400                 radeon_hpd_fini(rdev);
1401                 drm_mode_config_cleanup(rdev->ddev);
1402                 rdev->mode_info.mode_config_initialized = false;
1403         }
1404         /* free i2c buses */
1405         radeon_i2c_fini(rdev);
1406 }
1407
1408 static bool is_hdtv_mode(const struct drm_display_mode *mode)
1409 {
1410         /* try and guess if this is a tv or a monitor */
1411         if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
1412             (mode->vdisplay == 576) || /* 576p */
1413             (mode->vdisplay == 720) || /* 720p */
1414             (mode->vdisplay == 1080)) /* 1080p */
1415                 return true;
1416         else
1417                 return false;
1418 }
1419
1420 bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
1421                                 const struct drm_display_mode *mode,
1422                                 struct drm_display_mode *adjusted_mode)
1423 {
1424         struct drm_device *dev = crtc->dev;
1425         struct radeon_device *rdev = dev->dev_private;
1426         struct drm_encoder *encoder;
1427         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
1428         struct radeon_encoder *radeon_encoder;
1429         struct drm_connector *connector;
1430         struct radeon_connector *radeon_connector;
1431         bool first = true;
1432         u32 src_v = 1, dst_v = 1;
1433         u32 src_h = 1, dst_h = 1;
1434
1435         radeon_crtc->h_border = 0;
1436         radeon_crtc->v_border = 0;
1437
1438         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1439                 if (encoder->crtc != crtc)
1440                         continue;
1441                 radeon_encoder = to_radeon_encoder(encoder);
1442                 connector = radeon_get_connector_for_encoder(encoder);
1443                 radeon_connector = to_radeon_connector(connector);
1444
1445                 if (first) {
1446                         /* set scaling */
1447                         if (radeon_encoder->rmx_type == RMX_OFF)
1448                                 radeon_crtc->rmx_type = RMX_OFF;
1449                         else if (mode->hdisplay < radeon_encoder->native_mode.hdisplay ||
1450                                  mode->vdisplay < radeon_encoder->native_mode.vdisplay)
1451                                 radeon_crtc->rmx_type = radeon_encoder->rmx_type;
1452                         else
1453                                 radeon_crtc->rmx_type = RMX_OFF;
1454                         /* copy native mode */
1455                         memcpy(&radeon_crtc->native_mode,
1456                                &radeon_encoder->native_mode,
1457                                 sizeof(struct drm_display_mode));
1458                         src_v = crtc->mode.vdisplay;
1459                         dst_v = radeon_crtc->native_mode.vdisplay;
1460                         src_h = crtc->mode.hdisplay;
1461                         dst_h = radeon_crtc->native_mode.hdisplay;
1462
1463                         /* fix up for overscan on hdmi */
1464                         if (ASIC_IS_AVIVO(rdev) &&
1465                             (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
1466                             ((radeon_encoder->underscan_type == UNDERSCAN_ON) ||
1467                              ((radeon_encoder->underscan_type == UNDERSCAN_AUTO) &&
1468                               drm_detect_hdmi_monitor(radeon_connector->edid) &&
1469                               is_hdtv_mode(mode)))) {
1470                                 if (radeon_encoder->underscan_hborder != 0)
1471                                         radeon_crtc->h_border = radeon_encoder->underscan_hborder;
1472                                 else
1473                                         radeon_crtc->h_border = (mode->hdisplay >> 5) + 16;
1474                                 if (radeon_encoder->underscan_vborder != 0)
1475                                         radeon_crtc->v_border = radeon_encoder->underscan_vborder;
1476                                 else
1477                                         radeon_crtc->v_border = (mode->vdisplay >> 5) + 16;
1478                                 radeon_crtc->rmx_type = RMX_FULL;
1479                                 src_v = crtc->mode.vdisplay;
1480                                 dst_v = crtc->mode.vdisplay - (radeon_crtc->v_border * 2);
1481                                 src_h = crtc->mode.hdisplay;
1482                                 dst_h = crtc->mode.hdisplay - (radeon_crtc->h_border * 2);
1483                         }
1484                         first = false;
1485                 } else {
1486                         if (radeon_crtc->rmx_type != radeon_encoder->rmx_type) {
1487                                 /* WARNING: Right now this can't happen but
1488                                  * in the future we need to check that scaling
1489                                  * are consistent across different encoder
1490                                  * (ie all encoder can work with the same
1491                                  *  scaling).
1492                                  */
1493                                 DRM_ERROR("Scaling not consistent across encoder.\n");
1494                                 return false;
1495                         }
1496                 }
1497         }
1498         if (radeon_crtc->rmx_type != RMX_OFF) {
1499                 fixed20_12 a, b;
1500                 a.full = dfixed_const(src_v);
1501                 b.full = dfixed_const(dst_v);
1502                 radeon_crtc->vsc.full = dfixed_div(a, b);
1503                 a.full = dfixed_const(src_h);
1504                 b.full = dfixed_const(dst_h);
1505                 radeon_crtc->hsc.full = dfixed_div(a, b);
1506         } else {
1507                 radeon_crtc->vsc.full = dfixed_const(1);
1508                 radeon_crtc->hsc.full = dfixed_const(1);
1509         }
1510         return true;
1511 }
1512
1513 /*
1514  * Retrieve current video scanout position of crtc on a given gpu.
1515  *
1516  * \param dev Device to query.
1517  * \param crtc Crtc to query.
1518  * \param *vpos Location where vertical scanout position should be stored.
1519  * \param *hpos Location where horizontal scanout position should go.
1520  *
1521  * Returns vpos as a positive number while in active scanout area.
1522  * Returns vpos as a negative number inside vblank, counting the number
1523  * of scanlines to go until end of vblank, e.g., -1 means "one scanline
1524  * until start of active scanout / end of vblank."
1525  *
1526  * \return Flags, or'ed together as follows:
1527  *
1528  * DRM_SCANOUTPOS_VALID = Query successful.
1529  * DRM_SCANOUTPOS_INVBL = Inside vblank.
1530  * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
1531  * this flag means that returned position may be offset by a constant but
1532  * unknown small number of scanlines wrt. real scanout position.
1533  *
1534  */
1535 int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int *hpos)
1536 {
1537         u32 stat_crtc = 0, vbl = 0, position = 0;
1538         int vbl_start, vbl_end, vtotal, ret = 0;
1539         bool in_vbl = true;
1540
1541         struct radeon_device *rdev = dev->dev_private;
1542
1543         if (ASIC_IS_DCE4(rdev)) {
1544                 if (crtc == 0) {
1545                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1546                                      EVERGREEN_CRTC0_REGISTER_OFFSET);
1547                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1548                                           EVERGREEN_CRTC0_REGISTER_OFFSET);
1549                         ret |= DRM_SCANOUTPOS_VALID;
1550                 }
1551                 if (crtc == 1) {
1552                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1553                                      EVERGREEN_CRTC1_REGISTER_OFFSET);
1554                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1555                                           EVERGREEN_CRTC1_REGISTER_OFFSET);
1556                         ret |= DRM_SCANOUTPOS_VALID;
1557                 }
1558                 if (crtc == 2) {
1559                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1560                                      EVERGREEN_CRTC2_REGISTER_OFFSET);
1561                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1562                                           EVERGREEN_CRTC2_REGISTER_OFFSET);
1563                         ret |= DRM_SCANOUTPOS_VALID;
1564                 }
1565                 if (crtc == 3) {
1566                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1567                                      EVERGREEN_CRTC3_REGISTER_OFFSET);
1568                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1569                                           EVERGREEN_CRTC3_REGISTER_OFFSET);
1570                         ret |= DRM_SCANOUTPOS_VALID;
1571                 }
1572                 if (crtc == 4) {
1573                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1574                                      EVERGREEN_CRTC4_REGISTER_OFFSET);
1575                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1576                                           EVERGREEN_CRTC4_REGISTER_OFFSET);
1577                         ret |= DRM_SCANOUTPOS_VALID;
1578                 }
1579                 if (crtc == 5) {
1580                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
1581                                      EVERGREEN_CRTC5_REGISTER_OFFSET);
1582                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
1583                                           EVERGREEN_CRTC5_REGISTER_OFFSET);
1584                         ret |= DRM_SCANOUTPOS_VALID;
1585                 }
1586         } else if (ASIC_IS_AVIVO(rdev)) {
1587                 if (crtc == 0) {
1588                         vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END);
1589                         position = RREG32(AVIVO_D1CRTC_STATUS_POSITION);
1590                         ret |= DRM_SCANOUTPOS_VALID;
1591                 }
1592                 if (crtc == 1) {
1593                         vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END);
1594                         position = RREG32(AVIVO_D2CRTC_STATUS_POSITION);
1595                         ret |= DRM_SCANOUTPOS_VALID;
1596                 }
1597         } else {
1598                 /* Pre-AVIVO: Different encoding of scanout pos and vblank interval. */
1599                 if (crtc == 0) {
1600                         /* Assume vbl_end == 0, get vbl_start from
1601                          * upper 16 bits.
1602                          */
1603                         vbl = (RREG32(RADEON_CRTC_V_TOTAL_DISP) &
1604                                 RADEON_CRTC_V_DISP) >> RADEON_CRTC_V_DISP_SHIFT;
1605                         /* Only retrieve vpos from upper 16 bits, set hpos == 0. */
1606                         position = (RREG32(RADEON_CRTC_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL;
1607                         stat_crtc = RREG32(RADEON_CRTC_STATUS);
1608                         if (!(stat_crtc & 1))
1609                                 in_vbl = false;
1610
1611                         ret |= DRM_SCANOUTPOS_VALID;
1612                 }
1613                 if (crtc == 1) {
1614                         vbl = (RREG32(RADEON_CRTC2_V_TOTAL_DISP) &
1615                                 RADEON_CRTC_V_DISP) >> RADEON_CRTC_V_DISP_SHIFT;
1616                         position = (RREG32(RADEON_CRTC2_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL;
1617                         stat_crtc = RREG32(RADEON_CRTC2_STATUS);
1618                         if (!(stat_crtc & 1))
1619                                 in_vbl = false;
1620
1621                         ret |= DRM_SCANOUTPOS_VALID;
1622                 }
1623         }
1624
1625         /* Decode into vertical and horizontal scanout position. */
1626         *vpos = position & 0x1fff;
1627         *hpos = (position >> 16) & 0x1fff;
1628
1629         /* Valid vblank area boundaries from gpu retrieved? */
1630         if (vbl > 0) {
1631                 /* Yes: Decode. */
1632                 ret |= DRM_SCANOUTPOS_ACCURATE;
1633                 vbl_start = vbl & 0x1fff;
1634                 vbl_end = (vbl >> 16) & 0x1fff;
1635         }
1636         else {
1637                 /* No: Fake something reasonable which gives at least ok results. */
1638                 vbl_start = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vdisplay;
1639                 vbl_end = 0;
1640         }
1641
1642         /* Test scanout position against vblank region. */
1643         if ((*vpos < vbl_start) && (*vpos >= vbl_end))
1644                 in_vbl = false;
1645
1646         /* Check if inside vblank area and apply corrective offsets:
1647          * vpos will then be >=0 in video scanout area, but negative
1648          * within vblank area, counting down the number of lines until
1649          * start of scanout.
1650          */
1651
1652         /* Inside "upper part" of vblank area? Apply corrective offset if so: */
1653         if (in_vbl && (*vpos >= vbl_start)) {
1654                 vtotal = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vtotal;
1655                 *vpos = *vpos - vtotal;
1656         }
1657
1658         /* Correct for shifted end of vbl at vbl_end. */
1659         *vpos = *vpos - vbl_end;
1660
1661         /* In vblank? */
1662         if (in_vbl)
1663                 ret |= DRM_SCANOUTPOS_INVBL;
1664
1665         return ret;
1666 }