drivers/gpu/drm/amd/amdgpu/amdgpu_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/amdgpu_drm.h>
  28 #include "amdgpu.h"
  29 #include "amdgpu_i2c.h"
  30 #include "atom.h"
  31 #include "amdgpu_connectors.h"
  32 #include <asm/div64.h>
  33
  34 #include <linux/pm_runtime.h>
  35 #include <drm/drm_crtc_helper.h>
  36 #include <drm/drm_edid.h>
  37
  38 static void amdgpu_flip_wait_fence(struct amdgpu_device *adev,
  39                                    struct fence **f)
  40 {
  41         struct amdgpu_fence *fence;
  42         long r;
  43
  44         if (*f == NULL)
  45                 return;
  46
  47         fence = to_amdgpu_fence(*f);
  48         if (fence) {
  49                 r = fence_wait(&fence->base, false);
  50                 if (r == -EDEADLK)
  51                         r = amdgpu_gpu_reset(adev);
  52         } else
  53                 r = fence_wait(*f, false);
  54
  55         if (r)
  56                 DRM_ERROR("failed to wait on page flip fence (%ld)!\n", r);
  57
  58         /* We continue with the page flip even if we failed to wait on
  59          * the fence, otherwise the DRM core and userspace will be
  60          * confused about which BO the CRTC is scanning out
  61          */
  62         fence_put(*f);
  63         *f = NULL;
  64 }
  65
  66 static void amdgpu_flip_work_func(struct work_struct *__work)
  67 {
  68         struct amdgpu_flip_work *work =
  69                 container_of(__work, struct amdgpu_flip_work, flip_work);
  70         struct amdgpu_device *adev = work->adev;
  71         struct amdgpu_crtc *amdgpuCrtc = adev->mode_info.crtcs[work->crtc_id];
  72
  73         struct drm_crtc *crtc = &amdgpuCrtc->base;
  74         unsigned long flags;
  75         unsigned i, repcnt = 4;
  76         int vpos, hpos, stat, min_udelay = 0;
  77         struct drm_vblank_crtc *vblank = &crtc->dev->vblank[work->crtc_id];
  78
  79         amdgpu_flip_wait_fence(adev, &work->excl);
  80         for (i = 0; i < work->shared_count; ++i)
  81                 amdgpu_flip_wait_fence(adev, &work->shared[i]);
  82
  83         /* We borrow the event spin lock for protecting flip_status */
  84         spin_lock_irqsave(&crtc->dev->event_lock, flags);
  85
  86         /* If this happens to execute within the "virtually extended" vblank
  87          * interval before the start of the real vblank interval then it needs
  88          * to delay programming the mmio flip until the real vblank is entered.
  89          * This prevents completing a flip too early due to the way we fudge
  90          * our vblank counter and vblank timestamps in order to work around the
  91          * problem that the hw fires vblank interrupts before actual start of
  92          * vblank (when line buffer refilling is done for a frame). It
  93          * complements the fudging logic in amdgpu_get_crtc_scanoutpos() for
  94          * timestamping and amdgpu_get_vblank_counter_kms() for vblank counts.
  95          *
  96          * In practice this won't execute very often unless on very fast
  97          * machines because the time window for this to happen is very small.
  98          */
  99         while (amdgpuCrtc->enabled && --repcnt) {
 100                 /* GET_DISTANCE_TO_VBLANKSTART returns distance to real vblank
 101                  * start in hpos, and to the "fudged earlier" vblank start in
 102                  * vpos.
 103                  */
 104                 stat = amdgpu_get_crtc_scanoutpos(adev->ddev, work->crtc_id,
 105                                                   GET_DISTANCE_TO_VBLANKSTART,
 106                                                   &vpos, &hpos, NULL, NULL,
 107                                                   &crtc->hwmode);
 108
 109                 if ((stat & (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE)) !=
 110                     (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE) ||
 111                     !(vpos >= 0 && hpos <= 0))
 112                         break;
 113
 114                 /* Sleep at least until estimated real start of hw vblank */
 115                 min_udelay = (-hpos + 1) * max(vblank->linedur_ns / 1000, 5);
 116                 if (min_udelay > vblank->framedur_ns / 2000) {
 117                         /* Don't wait ridiculously long - something is wrong */
 118                         repcnt = 0;
 119                         break;
 120                 }
 121                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 122                 usleep_range(min_udelay, 2 * min_udelay);
 123                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
 124         };
 125
 126         if (!repcnt)
 127                 DRM_DEBUG_DRIVER("Delay problem on crtc %d: min_udelay %d, "
 128                                  "framedur %d, linedur %d, stat %d, vpos %d, "
 129                                  "hpos %d\n", work->crtc_id, min_udelay,
 130                                  vblank->framedur_ns / 1000,
 131                                  vblank->linedur_ns / 1000, stat, vpos, hpos);
 132
 133         /* do the flip (mmio) */
 134         adev->mode_info.funcs->page_flip(adev, work->crtc_id, work->base);
 135         /* set the flip status */
 136         amdgpuCrtc->pflip_status = AMDGPU_FLIP_SUBMITTED;
 137
 138         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 139 }
 140
 141 /*
 142  * Handle unpin events outside the interrupt handler proper.
 143  */
 144 static void amdgpu_unpin_work_func(struct work_struct *__work)
 145 {
 146         struct amdgpu_flip_work *work =
 147                 container_of(__work, struct amdgpu_flip_work, unpin_work);
 148         int r;
 149
 150         /* unpin of the old buffer */
 151         r = amdgpu_bo_reserve(work->old_rbo, false);
 152         if (likely(r == 0)) {
 153                 r = amdgpu_bo_unpin(work->old_rbo);
 154                 if (unlikely(r != 0)) {
 155                         DRM_ERROR("failed to unpin buffer after flip\n");
 156                 }
 157                 amdgpu_bo_unreserve(work->old_rbo);
 158         } else
 159                 DRM_ERROR("failed to reserve buffer after flip\n");
 160
 161         amdgpu_bo_unref(&work->old_rbo);
 162         kfree(work->shared);
 163         kfree(work);
 164 }
 165
 166 int amdgpu_crtc_page_flip(struct drm_crtc *crtc,
 167                           struct drm_framebuffer *fb,
 168                           struct drm_pending_vblank_event *event,
 169                           uint32_t page_flip_flags)
 170 {
 171         struct drm_device *dev = crtc->dev;
 172         struct amdgpu_device *adev = dev->dev_private;
 173         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 174         struct amdgpu_framebuffer *old_amdgpu_fb;
 175         struct amdgpu_framebuffer *new_amdgpu_fb;
 176         struct drm_gem_object *obj;
 177         struct amdgpu_flip_work *work;
 178         struct amdgpu_bo *new_rbo;
 179         unsigned long flags;
 180         u64 tiling_flags;
 181         u64 base;
 182         int i, r;
 183
 184         work = kzalloc(sizeof *work, GFP_KERNEL);
 185         if (work == NULL)
 186                 return -ENOMEM;
 187
 188         INIT_WORK(&work->flip_work, amdgpu_flip_work_func);
 189         INIT_WORK(&work->unpin_work, amdgpu_unpin_work_func);
 190
 191         work->event = event;
 192         work->adev = adev;
 193         work->crtc_id = amdgpu_crtc->crtc_id;
 194
 195         /* schedule unpin of the old buffer */
 196         old_amdgpu_fb = to_amdgpu_framebuffer(crtc->primary->fb);
 197         obj = old_amdgpu_fb->obj;
 198
 199         /* take a reference to the old object */
 200         work->old_rbo = gem_to_amdgpu_bo(obj);
 201         amdgpu_bo_ref(work->old_rbo);
 202
 203         new_amdgpu_fb = to_amdgpu_framebuffer(fb);
 204         obj = new_amdgpu_fb->obj;
 205         new_rbo = gem_to_amdgpu_bo(obj);
 206
 207         /* pin the new buffer */
 208         r = amdgpu_bo_reserve(new_rbo, false);
 209         if (unlikely(r != 0)) {
 210                 DRM_ERROR("failed to reserve new rbo buffer before flip\n");
 211                 goto cleanup;
 212         }
 213
 214         r = amdgpu_bo_pin_restricted(new_rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, &base);
 215         if (unlikely(r != 0)) {
 216                 amdgpu_bo_unreserve(new_rbo);
 217                 r = -EINVAL;
 218                 DRM_ERROR("failed to pin new rbo buffer before flip\n");
 219                 goto cleanup;
 220         }
 221
 222         r = reservation_object_get_fences_rcu(new_rbo->tbo.resv, &work->excl,
 223                                               &work->shared_count,
 224                                               &work->shared);
 225         if (unlikely(r != 0)) {
 226                 amdgpu_bo_unreserve(new_rbo);
 227                 DRM_ERROR("failed to get fences for buffer\n");
 228                 goto cleanup;
 229         }
 230
 231         amdgpu_bo_get_tiling_flags(new_rbo, &tiling_flags);
 232         amdgpu_bo_unreserve(new_rbo);
 233
 234         work->base = base;
 235
 236         r = drm_vblank_get(crtc->dev, amdgpu_crtc->crtc_id);
 237         if (r) {
 238                 DRM_ERROR("failed to get vblank before flip\n");
 239                 goto pflip_cleanup;
 240         }
 241
 242         /* we borrow the event spin lock for protecting flip_wrok */
 243         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 244         if (amdgpu_crtc->pflip_status != AMDGPU_FLIP_NONE) {
 245                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
 246                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 247                 r = -EBUSY;
 248                 goto vblank_cleanup;
 249         }
 250
 251         amdgpu_crtc->pflip_status = AMDGPU_FLIP_PENDING;
 252         amdgpu_crtc->pflip_works = work;
 253
 254         /* update crtc fb */
 255         crtc->primary->fb = fb;
 256         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 257         queue_work(amdgpu_crtc->pflip_queue, &work->flip_work);
 258         return 0;
 259
 260 vblank_cleanup:
 261         drm_vblank_put(crtc->dev, amdgpu_crtc->crtc_id);
 262
 263 pflip_cleanup:
 264         if (unlikely(amdgpu_bo_reserve(new_rbo, false) != 0)) {
 265                 DRM_ERROR("failed to reserve new rbo in error path\n");
 266                 goto cleanup;
 267         }
 268         if (unlikely(amdgpu_bo_unpin(new_rbo) != 0)) {
 269                 DRM_ERROR("failed to unpin new rbo in error path\n");
 270         }
 271         amdgpu_bo_unreserve(new_rbo);
 272
 273 cleanup:
 274         amdgpu_bo_unref(&work->old_rbo);
 275         fence_put(work->excl);
 276         for (i = 0; i < work->shared_count; ++i)
 277                 fence_put(work->shared[i]);
 278         kfree(work->shared);
 279         kfree(work);
 280
 281         return r;
 282 }
 283
 284 int amdgpu_crtc_set_config(struct drm_mode_set *set)
 285 {
 286         struct drm_device *dev;
 287         struct amdgpu_device *adev;
 288         struct drm_crtc *crtc;
 289         bool active = false;
 290         int ret;
 291
 292         if (!set || !set->crtc)
 293                 return -EINVAL;
 294
 295         dev = set->crtc->dev;
 296
 297         ret = pm_runtime_get_sync(dev->dev);
 298         if (ret < 0)
 299                 goto out;
 300
 301         ret = drm_crtc_helper_set_config(set);
 302
 303         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 304                 if (crtc->enabled)
 305                         active = true;
 306
 307         pm_runtime_mark_last_busy(dev->dev);
 308
 309         adev = dev->dev_private;
 310         /* if we have active crtcs and we don't have a power ref,
 311            take the current one */
 312         if (active && !adev->have_disp_power_ref) {
 313                 adev->have_disp_power_ref = true;
 314                 return ret;
 315         }
 316         /* if we have no active crtcs, then drop the power ref
 317            we got before */
 318         if (!active && adev->have_disp_power_ref) {
 319                 pm_runtime_put_autosuspend(dev->dev);
 320                 adev->have_disp_power_ref = false;
 321         }
 322
 323 out:
 324         /* drop the power reference we got coming in here */
 325         pm_runtime_put_autosuspend(dev->dev);
 326         return ret;
 327 }
 328
 329 static const char *encoder_names[38] = {
 330         "NONE",
 331         "INTERNAL_LVDS",
 332         "INTERNAL_TMDS1",
 333         "INTERNAL_TMDS2",
 334         "INTERNAL_DAC1",
 335         "INTERNAL_DAC2",
 336         "INTERNAL_SDVOA",
 337         "INTERNAL_SDVOB",
 338         "SI170B",
 339         "CH7303",
 340         "CH7301",
 341         "INTERNAL_DVO1",
 342         "EXTERNAL_SDVOA",
 343         "EXTERNAL_SDVOB",
 344         "TITFP513",
 345         "INTERNAL_LVTM1",
 346         "VT1623",
 347         "HDMI_SI1930",
 348         "HDMI_INTERNAL",
 349         "INTERNAL_KLDSCP_TMDS1",
 350         "INTERNAL_KLDSCP_DVO1",
 351         "INTERNAL_KLDSCP_DAC1",
 352         "INTERNAL_KLDSCP_DAC2",
 353         "SI178",
 354         "MVPU_FPGA",
 355         "INTERNAL_DDI",
 356         "VT1625",
 357         "HDMI_SI1932",
 358         "DP_AN9801",
 359         "DP_DP501",
 360         "INTERNAL_UNIPHY",
 361         "INTERNAL_KLDSCP_LVTMA",
 362         "INTERNAL_UNIPHY1",
 363         "INTERNAL_UNIPHY2",
 364         "NUTMEG",
 365         "TRAVIS",
 366         "INTERNAL_VCE",
 367         "INTERNAL_UNIPHY3",
 368 };
 369
 370 static const char *hpd_names[6] = {
 371         "HPD1",
 372         "HPD2",
 373         "HPD3",
 374         "HPD4",
 375         "HPD5",
 376         "HPD6",
 377 };
 378
 379 void amdgpu_print_display_setup(struct drm_device *dev)
 380 {
 381         struct drm_connector *connector;
 382         struct amdgpu_connector *amdgpu_connector;
 383         struct drm_encoder *encoder;
 384         struct amdgpu_encoder *amdgpu_encoder;
 385         uint32_t devices;
 386         int i = 0;
 387
 388         DRM_INFO("AMDGPU Display Connectors\n");
 389         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 390                 amdgpu_connector = to_amdgpu_connector(connector);
 391                 DRM_INFO("Connector %d:\n", i);
 392                 DRM_INFO("  %s\n", connector->name);
 393                 if (amdgpu_connector->hpd.hpd != AMDGPU_HPD_NONE)
 394                         DRM_INFO("  %s\n", hpd_names[amdgpu_connector->hpd.hpd]);
 395                 if (amdgpu_connector->ddc_bus) {
 396                         DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
 397                                  amdgpu_connector->ddc_bus->rec.mask_clk_reg,
 398                                  amdgpu_connector->ddc_bus->rec.mask_data_reg,
 399                                  amdgpu_connector->ddc_bus->rec.a_clk_reg,
 400                                  amdgpu_connector->ddc_bus->rec.a_data_reg,
 401                                  amdgpu_connector->ddc_bus->rec.en_clk_reg,
 402                                  amdgpu_connector->ddc_bus->rec.en_data_reg,
 403                                  amdgpu_connector->ddc_bus->rec.y_clk_reg,
 404                                  amdgpu_connector->ddc_bus->rec.y_data_reg);
 405                         if (amdgpu_connector->router.ddc_valid)
 406                                 DRM_INFO("  DDC Router 0x%x/0x%x\n",
 407                                          amdgpu_connector->router.ddc_mux_control_pin,
 408                                          amdgpu_connector->router.ddc_mux_state);
 409                         if (amdgpu_connector->router.cd_valid)
 410                                 DRM_INFO("  Clock/Data Router 0x%x/0x%x\n",
 411                                          amdgpu_connector->router.cd_mux_control_pin,
 412                                          amdgpu_connector->router.cd_mux_state);
 413                 } else {
 414                         if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
 415                             connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
 416                             connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
 417                             connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
 418                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
 419                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
 420                                 DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");
 421                 }
 422                 DRM_INFO("  Encoders:\n");
 423                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 424                         amdgpu_encoder = to_amdgpu_encoder(encoder);
 425                         devices = amdgpu_encoder->devices & amdgpu_connector->devices;
 426                         if (devices) {
 427                                 if (devices & ATOM_DEVICE_CRT1_SUPPORT)
 428                                         DRM_INFO("    CRT1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 429                                 if (devices & ATOM_DEVICE_CRT2_SUPPORT)
 430                                         DRM_INFO("    CRT2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 431                                 if (devices & ATOM_DEVICE_LCD1_SUPPORT)
 432                                         DRM_INFO("    LCD1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 433                                 if (devices & ATOM_DEVICE_DFP1_SUPPORT)
 434                                         DRM_INFO("    DFP1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 435                                 if (devices & ATOM_DEVICE_DFP2_SUPPORT)
 436                                         DRM_INFO("    DFP2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 437                                 if (devices & ATOM_DEVICE_DFP3_SUPPORT)
 438                                         DRM_INFO("    DFP3: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 439                                 if (devices & ATOM_DEVICE_DFP4_SUPPORT)
 440                                         DRM_INFO("    DFP4: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 441                                 if (devices & ATOM_DEVICE_DFP5_SUPPORT)
 442                                         DRM_INFO("    DFP5: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 443                                 if (devices & ATOM_DEVICE_DFP6_SUPPORT)
 444                                         DRM_INFO("    DFP6: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 445                                 if (devices & ATOM_DEVICE_TV1_SUPPORT)
 446                                         DRM_INFO("    TV1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 447                                 if (devices & ATOM_DEVICE_CV_SUPPORT)
 448                                         DRM_INFO("    CV: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 449                         }
 450                 }
 451                 i++;
 452         }
 453 }
 454
 455 /**
 456  * amdgpu_ddc_probe
 457  *
 458  */
 459 bool amdgpu_ddc_probe(struct amdgpu_connector *amdgpu_connector,
 460                        bool use_aux)
 461 {
 462         u8 out = 0x0;
 463         u8 buf[8];
 464         int ret;
 465         struct i2c_msg msgs[] = {
 466                 {
 467                         .addr = DDC_ADDR,
 468                         .flags = 0,
 469                         .len = 1,
 470                         .buf = &out,
 471                 },
 472                 {
 473                         .addr = DDC_ADDR,
 474                         .flags = I2C_M_RD,
 475                         .len = 8,
 476                         .buf = buf,
 477                 }
 478         };
 479
 480         /* on hw with routers, select right port */
 481         if (amdgpu_connector->router.ddc_valid)
 482                 amdgpu_i2c_router_select_ddc_port(amdgpu_connector);
 483
 484         if (use_aux) {
 485                 ret = i2c_transfer(&amdgpu_connector->ddc_bus->aux.ddc, msgs, 2);
 486         } else {
 487                 ret = i2c_transfer(&amdgpu_connector->ddc_bus->adapter, msgs, 2);
 488         }
 489
 490         if (ret != 2)
 491                 /* Couldn't find an accessible DDC on this connector */
 492                 return false;
 493         /* Probe also for valid EDID header
 494          * EDID header starts with:
 495          * 0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00.
 496          * Only the first 6 bytes must be valid as
 497          * drm_edid_block_valid() can fix the last 2 bytes */
 498         if (drm_edid_header_is_valid(buf) < 6) {
 499                 /* Couldn't find an accessible EDID on this
 500                  * connector */
 501                 return false;
 502         }
 503         return true;
 504 }
 505
 506 static void amdgpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
 507 {
 508         struct amdgpu_framebuffer *amdgpu_fb = to_amdgpu_framebuffer(fb);
 509
 510         if (amdgpu_fb->obj) {
 511                 drm_gem_object_unreference_unlocked(amdgpu_fb->obj);
 512         }
 513         drm_framebuffer_cleanup(fb);
 514         kfree(amdgpu_fb);
 515 }
 516
 517 static int amdgpu_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 518                                                   struct drm_file *file_priv,
 519                                                   unsigned int *handle)
 520 {
 521         struct amdgpu_framebuffer *amdgpu_fb = to_amdgpu_framebuffer(fb);
 522
 523         return drm_gem_handle_create(file_priv, amdgpu_fb->obj, handle);
 524 }
 525
 526 static const struct drm_framebuffer_funcs amdgpu_fb_funcs = {
 527         .destroy = amdgpu_user_framebuffer_destroy,
 528         .create_handle = amdgpu_user_framebuffer_create_handle,
 529 };
 530
 531 int
 532 amdgpu_framebuffer_init(struct drm_device *dev,
 533                         struct amdgpu_framebuffer *rfb,
 534                         struct drm_mode_fb_cmd2 *mode_cmd,
 535                         struct drm_gem_object *obj)
 536 {
 537         int ret;
 538         rfb->obj = obj;
 539         drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
 540         ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
 541         if (ret) {
 542                 rfb->obj = NULL;
 543                 return ret;
 544         }
 545         return 0;
 546 }
 547
 548 static struct drm_framebuffer *
 549 amdgpu_user_framebuffer_create(struct drm_device *dev,
 550                                struct drm_file *file_priv,
 551                                struct drm_mode_fb_cmd2 *mode_cmd)
 552 {
 553         struct drm_gem_object *obj;
 554         struct amdgpu_framebuffer *amdgpu_fb;
 555         int ret;
 556
 557         obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
 558         if (obj ==  NULL) {
 559                 dev_err(&dev->pdev->dev, "No GEM object associated to handle 0x%08X, "
 560                         "can't create framebuffer\n", mode_cmd->handles[0]);
 561                 return ERR_PTR(-ENOENT);
 562         }
 563
 564         /* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */
 565         if (obj->import_attach) {
 566                 DRM_DEBUG_KMS("Cannot create framebuffer from imported dma_buf\n");
 567                 return ERR_PTR(-EINVAL);
 568         }
 569
 570         amdgpu_fb = kzalloc(sizeof(*amdgpu_fb), GFP_KERNEL);
 571         if (amdgpu_fb == NULL) {
 572                 drm_gem_object_unreference_unlocked(obj);
 573                 return ERR_PTR(-ENOMEM);
 574         }
 575
 576         ret = amdgpu_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
 577         if (ret) {
 578                 kfree(amdgpu_fb);
 579                 drm_gem_object_unreference_unlocked(obj);
 580                 return ERR_PTR(ret);
 581         }
 582
 583         return &amdgpu_fb->base;
 584 }
 585
 586 static void amdgpu_output_poll_changed(struct drm_device *dev)
 587 {
 588         struct amdgpu_device *adev = dev->dev_private;
 589         amdgpu_fb_output_poll_changed(adev);
 590 }
 591
 592 const struct drm_mode_config_funcs amdgpu_mode_funcs = {
 593         .fb_create = amdgpu_user_framebuffer_create,
 594         .output_poll_changed = amdgpu_output_poll_changed
 595 };
 596
 597 static struct drm_prop_enum_list amdgpu_underscan_enum_list[] =
 598 {       { UNDERSCAN_OFF, "off" },
 599         { UNDERSCAN_ON, "on" },
 600         { UNDERSCAN_AUTO, "auto" },
 601 };
 602
 603 static struct drm_prop_enum_list amdgpu_audio_enum_list[] =
 604 {       { AMDGPU_AUDIO_DISABLE, "off" },
 605         { AMDGPU_AUDIO_ENABLE, "on" },
 606         { AMDGPU_AUDIO_AUTO, "auto" },
 607 };
 608
 609 /* XXX support different dither options? spatial, temporal, both, etc. */
 610 static struct drm_prop_enum_list amdgpu_dither_enum_list[] =
 611 {       { AMDGPU_FMT_DITHER_DISABLE, "off" },
 612         { AMDGPU_FMT_DITHER_ENABLE, "on" },
 613 };
 614
 615 int amdgpu_modeset_create_props(struct amdgpu_device *adev)
 616 {
 617         int sz;
 618
 619         if (adev->is_atom_bios) {
 620                 adev->mode_info.coherent_mode_property =
 621                         drm_property_create_range(adev->ddev, 0 , "coherent", 0, 1);
 622                 if (!adev->mode_info.coherent_mode_property)
 623                         return -ENOMEM;
 624         }
 625
 626         adev->mode_info.load_detect_property =
 627                 drm_property_create_range(adev->ddev, 0, "load detection", 0, 1);
 628         if (!adev->mode_info.load_detect_property)
 629                 return -ENOMEM;
 630
 631         drm_mode_create_scaling_mode_property(adev->ddev);
 632
 633         sz = ARRAY_SIZE(amdgpu_underscan_enum_list);
 634         adev->mode_info.underscan_property =
 635                 drm_property_create_enum(adev->ddev, 0,
 636                                     "underscan",
 637                                     amdgpu_underscan_enum_list, sz);
 638
 639         adev->mode_info.underscan_hborder_property =
 640                 drm_property_create_range(adev->ddev, 0,
 641                                         "underscan hborder", 0, 128);
 642         if (!adev->mode_info.underscan_hborder_property)
 643                 return -ENOMEM;
 644
 645         adev->mode_info.underscan_vborder_property =
 646                 drm_property_create_range(adev->ddev, 0,
 647                                         "underscan vborder", 0, 128);
 648         if (!adev->mode_info.underscan_vborder_property)
 649                 return -ENOMEM;
 650
 651         sz = ARRAY_SIZE(amdgpu_audio_enum_list);
 652         adev->mode_info.audio_property =
 653                 drm_property_create_enum(adev->ddev, 0,
 654                                          "audio",
 655                                          amdgpu_audio_enum_list, sz);
 656
 657         sz = ARRAY_SIZE(amdgpu_dither_enum_list);
 658         adev->mode_info.dither_property =
 659                 drm_property_create_enum(adev->ddev, 0,
 660                                          "dither",
 661                                          amdgpu_dither_enum_list, sz);
 662
 663         return 0;
 664 }
 665
 666 void amdgpu_update_display_priority(struct amdgpu_device *adev)
 667 {
 668         /* adjustment options for the display watermarks */
 669         if ((amdgpu_disp_priority == 0) || (amdgpu_disp_priority > 2))
 670                 adev->mode_info.disp_priority = 0;
 671         else
 672                 adev->mode_info.disp_priority = amdgpu_disp_priority;
 673
 674 }
 675
 676 static bool is_hdtv_mode(const struct drm_display_mode *mode)
 677 {
 678         /* try and guess if this is a tv or a monitor */
 679         if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
 680             (mode->vdisplay == 576) || /* 576p */
 681             (mode->vdisplay == 720) || /* 720p */
 682             (mode->vdisplay == 1080)) /* 1080p */
 683                 return true;
 684         else
 685                 return false;
 686 }
 687
 688 bool amdgpu_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
 689                                     const struct drm_display_mode *mode,
 690                                     struct drm_display_mode *adjusted_mode)
 691 {
 692         struct drm_device *dev = crtc->dev;
 693         struct drm_encoder *encoder;
 694         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 695         struct amdgpu_encoder *amdgpu_encoder;
 696         struct drm_connector *connector;
 697         struct amdgpu_connector *amdgpu_connector;
 698         u32 src_v = 1, dst_v = 1;
 699         u32 src_h = 1, dst_h = 1;
 700
 701         amdgpu_crtc->h_border = 0;
 702         amdgpu_crtc->v_border = 0;
 703
 704         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 705                 if (encoder->crtc != crtc)
 706                         continue;
 707                 amdgpu_encoder = to_amdgpu_encoder(encoder);
 708                 connector = amdgpu_get_connector_for_encoder(encoder);
 709                 amdgpu_connector = to_amdgpu_connector(connector);
 710
 711                 /* set scaling */
 712                 if (amdgpu_encoder->rmx_type == RMX_OFF)
 713                         amdgpu_crtc->rmx_type = RMX_OFF;
 714                 else if (mode->hdisplay < amdgpu_encoder->native_mode.hdisplay ||
 715                          mode->vdisplay < amdgpu_encoder->native_mode.vdisplay)
 716                         amdgpu_crtc->rmx_type = amdgpu_encoder->rmx_type;
 717                 else
 718                         amdgpu_crtc->rmx_type = RMX_OFF;
 719                 /* copy native mode */
 720                 memcpy(&amdgpu_crtc->native_mode,
 721                        &amdgpu_encoder->native_mode,
 722                        sizeof(struct drm_display_mode));
 723                 src_v = crtc->mode.vdisplay;
 724                 dst_v = amdgpu_crtc->native_mode.vdisplay;
 725                 src_h = crtc->mode.hdisplay;
 726                 dst_h = amdgpu_crtc->native_mode.hdisplay;
 727
 728                 /* fix up for overscan on hdmi */
 729                 if ((!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
 730                     ((amdgpu_encoder->underscan_type == UNDERSCAN_ON) ||
 731                      ((amdgpu_encoder->underscan_type == UNDERSCAN_AUTO) &&
 732                       drm_detect_hdmi_monitor(amdgpu_connector_edid(connector)) &&
 733                       is_hdtv_mode(mode)))) {
 734                         if (amdgpu_encoder->underscan_hborder != 0)
 735                                 amdgpu_crtc->h_border = amdgpu_encoder->underscan_hborder;
 736                         else
 737                                 amdgpu_crtc->h_border = (mode->hdisplay >> 5) + 16;
 738                         if (amdgpu_encoder->underscan_vborder != 0)
 739                                 amdgpu_crtc->v_border = amdgpu_encoder->underscan_vborder;
 740                         else
 741                                 amdgpu_crtc->v_border = (mode->vdisplay >> 5) + 16;
 742                         amdgpu_crtc->rmx_type = RMX_FULL;
 743                         src_v = crtc->mode.vdisplay;
 744                         dst_v = crtc->mode.vdisplay - (amdgpu_crtc->v_border * 2);
 745                         src_h = crtc->mode.hdisplay;
 746                         dst_h = crtc->mode.hdisplay - (amdgpu_crtc->h_border * 2);
 747                 }
 748         }
 749         if (amdgpu_crtc->rmx_type != RMX_OFF) {
 750                 fixed20_12 a, b;
 751                 a.full = dfixed_const(src_v);
 752                 b.full = dfixed_const(dst_v);
 753                 amdgpu_crtc->vsc.full = dfixed_div(a, b);
 754                 a.full = dfixed_const(src_h);
 755                 b.full = dfixed_const(dst_h);
 756                 amdgpu_crtc->hsc.full = dfixed_div(a, b);
 757         } else {
 758                 amdgpu_crtc->vsc.full = dfixed_const(1);
 759                 amdgpu_crtc->hsc.full = dfixed_const(1);
 760         }
 761         return true;
 762 }
 763
 764 /*
 765  * Retrieve current video scanout position of crtc on a given gpu, and
 766  * an optional accurate timestamp of when query happened.
 767  *
 768  * \param dev Device to query.
 769  * \param pipe Crtc to query.
 770  * \param flags Flags from caller (DRM_CALLED_FROM_VBLIRQ or 0).
 771  *              For driver internal use only also supports these flags:
 772  *
 773  *              USE_REAL_VBLANKSTART to use the real start of vblank instead
 774  *              of a fudged earlier start of vblank.
 775  *
 776  *              GET_DISTANCE_TO_VBLANKSTART to return distance to the
 777  *              fudged earlier start of vblank in *vpos and the distance
 778  *              to true start of vblank in *hpos.
 779  *
 780  * \param *vpos Location where vertical scanout position should be stored.
 781  * \param *hpos Location where horizontal scanout position should go.
 782  * \param *stime Target location for timestamp taken immediately before
 783  *               scanout position query. Can be NULL to skip timestamp.
 784  * \param *etime Target location for timestamp taken immediately after
 785  *               scanout position query. Can be NULL to skip timestamp.
 786  *
 787  * Returns vpos as a positive number while in active scanout area.
 788  * Returns vpos as a negative number inside vblank, counting the number
 789  * of scanlines to go until end of vblank, e.g., -1 means "one scanline
 790  * until start of active scanout / end of vblank."
 791  *
 792  * \return Flags, or'ed together as follows:
 793  *
 794  * DRM_SCANOUTPOS_VALID = Query successful.
 795  * DRM_SCANOUTPOS_INVBL = Inside vblank.
 796  * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
 797  * this flag means that returned position may be offset by a constant but
 798  * unknown small number of scanlines wrt. real scanout position.
 799  *
 800  */
 801 int amdgpu_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
 802                                unsigned int flags, int *vpos, int *hpos,
 803                                ktime_t *stime, ktime_t *etime,
 804                                const struct drm_display_mode *mode)
 805 {
 806         u32 vbl = 0, position = 0;
 807         int vbl_start, vbl_end, vtotal, ret = 0;
 808         bool in_vbl = true;
 809
 810         struct amdgpu_device *adev = dev->dev_private;
 811
 812         /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
 813
 814         /* Get optional system timestamp before query. */
 815         if (stime)
 816                 *stime = ktime_get();
 817
 818         if (amdgpu_display_page_flip_get_scanoutpos(adev, pipe, &vbl, &position) == 0)
 819                 ret |= DRM_SCANOUTPOS_VALID;
 820
 821         /* Get optional system timestamp after query. */
 822         if (etime)
 823                 *etime = ktime_get();
 824
 825         /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
 826
 827         /* Decode into vertical and horizontal scanout position. */
 828         *vpos = position & 0x1fff;
 829         *hpos = (position >> 16) & 0x1fff;
 830
 831         /* Valid vblank area boundaries from gpu retrieved? */
 832         if (vbl > 0) {
 833                 /* Yes: Decode. */
 834                 ret |= DRM_SCANOUTPOS_ACCURATE;
 835                 vbl_start = vbl & 0x1fff;
 836                 vbl_end = (vbl >> 16) & 0x1fff;
 837         }
 838         else {
 839                 /* No: Fake something reasonable which gives at least ok results. */
 840                 vbl_start = mode->crtc_vdisplay;
 841                 vbl_end = 0;
 842         }
 843
 844         /* Called from driver internal vblank counter query code? */
 845         if (flags & GET_DISTANCE_TO_VBLANKSTART) {
 846             /* Caller wants distance from real vbl_start in *hpos */
 847             *hpos = *vpos - vbl_start;
 848         }
 849
 850         /* Fudge vblank to start a few scanlines earlier to handle the
 851          * problem that vblank irqs fire a few scanlines before start
 852          * of vblank. Some driver internal callers need the true vblank
 853          * start to be used and signal this via the USE_REAL_VBLANKSTART flag.
 854          *
 855          * The cause of the "early" vblank irq is that the irq is triggered
 856          * by the line buffer logic when the line buffer read position enters
 857          * the vblank, whereas our crtc scanout position naturally lags the
 858          * line buffer read position.
 859          */
 860         if (!(flags & USE_REAL_VBLANKSTART))
 861                 vbl_start -= adev->mode_info.crtcs[pipe]->lb_vblank_lead_lines;
 862
 863         /* Test scanout position against vblank region. */
 864         if ((*vpos < vbl_start) && (*vpos >= vbl_end))
 865                 in_vbl = false;
 866
 867         /* In vblank? */
 868         if (in_vbl)
 869             ret |= DRM_SCANOUTPOS_IN_VBLANK;
 870
 871         /* Called from driver internal vblank counter query code? */
 872         if (flags & GET_DISTANCE_TO_VBLANKSTART) {
 873                 /* Caller wants distance from fudged earlier vbl_start */
 874                 *vpos -= vbl_start;
 875                 return ret;
 876         }
 877
 878         /* Check if inside vblank area and apply corrective offsets:
 879          * vpos will then be >=0 in video scanout area, but negative
 880          * within vblank area, counting down the number of lines until
 881          * start of scanout.
 882          */
 883
 884         /* Inside "upper part" of vblank area? Apply corrective offset if so: */
 885         if (in_vbl && (*vpos >= vbl_start)) {
 886                 vtotal = mode->crtc_vtotal;
 887                 *vpos = *vpos - vtotal;
 888         }
 889
 890         /* Correct for shifted end of vbl at vbl_end. */
 891         *vpos = *vpos - vbl_end;
 892
 893         return ret;
 894 }
 895
 896 int amdgpu_crtc_idx_to_irq_type(struct amdgpu_device *adev, int crtc)
 897 {
 898         if (crtc < 0 || crtc >= adev->mode_info.num_crtc)
 899                 return AMDGPU_CRTC_IRQ_NONE;
 900
 901         switch (crtc) {
 902         case 0:
 903                 return AMDGPU_CRTC_IRQ_VBLANK1;
 904         case 1:
 905                 return AMDGPU_CRTC_IRQ_VBLANK2;
 906         case 2:
 907                 return AMDGPU_CRTC_IRQ_VBLANK3;
 908         case 3:
 909                 return AMDGPU_CRTC_IRQ_VBLANK4;
 910         case 4:
 911                 return AMDGPU_CRTC_IRQ_VBLANK5;
 912         case 5:
 913                 return AMDGPU_CRTC_IRQ_VBLANK6;
 914         default:
 915                 return AMDGPU_CRTC_IRQ_NONE;
 916         }
 917 }