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_callback(struct dma_fence *f, struct dma_fence_cb *cb)
  39 {
  40         struct amdgpu_flip_work *work =
  41                 container_of(cb, struct amdgpu_flip_work, cb);
  42
  43         dma_fence_put(f);
  44         schedule_work(&work->flip_work.work);
  45 }
  46
  47 static bool amdgpu_flip_handle_fence(struct amdgpu_flip_work *work,
  48                                      struct dma_fence **f)
  49 {
  50         struct dma_fence *fence= *f;
  51
  52         if (fence == NULL)
  53                 return false;
  54
  55         *f = NULL;
  56
  57         if (!dma_fence_add_callback(fence, &work->cb, amdgpu_flip_callback))
  58                 return true;
  59
  60         dma_fence_put(fence);
  61         return false;
  62 }
  63
  64 static void amdgpu_flip_work_func(struct work_struct *__work)
  65 {
  66         struct delayed_work *delayed_work =
  67                 container_of(__work, struct delayed_work, work);
  68         struct amdgpu_flip_work *work =
  69                 container_of(delayed_work, struct amdgpu_flip_work, flip_work);
  70         struct amdgpu_device *adev = work->adev;
  71         struct amdgpu_crtc *amdgpu_crtc = adev->mode_info.crtcs[work->crtc_id];
  72
  73         struct drm_crtc *crtc = &amdgpu_crtc->base;
  74         unsigned long flags;
  75         unsigned i;
  76         int vpos, hpos;
  77
  78         if (amdgpu_flip_handle_fence(work, &work->excl))
  79                 return;
  80
  81         for (i = 0; i < work->shared_count; ++i)
  82                 if (amdgpu_flip_handle_fence(work, &work->shared[i]))
  83                         return;
  84
  85         /* Wait until we're out of the vertical blank period before the one
  86          * targeted by the flip
  87          */
  88         if (amdgpu_crtc->enabled &&
  89             (amdgpu_get_crtc_scanoutpos(adev->ddev, work->crtc_id, 0,
  90                                         &vpos, &hpos, NULL, NULL,
  91                                         &crtc->hwmode)
  92              & (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_IN_VBLANK)) ==
  93             (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_IN_VBLANK) &&
  94             (int)(work->target_vblank -
  95                   amdgpu_get_vblank_counter_kms(adev->ddev, amdgpu_crtc->crtc_id)) > 0) {
  96                 schedule_delayed_work(&work->flip_work, usecs_to_jiffies(1000));
  97                 return;
  98         }
  99
 100         /* We borrow the event spin lock for protecting flip_status */
 101         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 102
 103         /* Do the flip (mmio) */
 104         adev->mode_info.funcs->page_flip(adev, work->crtc_id, work->base, work->async);
 105
 106         /* Set the flip status */
 107         amdgpu_crtc->pflip_status = AMDGPU_FLIP_SUBMITTED;
 108         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 109
 110
 111         DRM_DEBUG_DRIVER("crtc:%d[%p], pflip_stat:AMDGPU_FLIP_SUBMITTED, work: %p,\n",
 112                                          amdgpu_crtc->crtc_id, amdgpu_crtc, work);
 113
 114 }
 115
 116 /*
 117  * Handle unpin events outside the interrupt handler proper.
 118  */
 119 static void amdgpu_unpin_work_func(struct work_struct *__work)
 120 {
 121         struct amdgpu_flip_work *work =
 122                 container_of(__work, struct amdgpu_flip_work, unpin_work);
 123         int r;
 124
 125         /* unpin of the old buffer */
 126         r = amdgpu_bo_reserve(work->old_abo, false);
 127         if (likely(r == 0)) {
 128                 r = amdgpu_bo_unpin(work->old_abo);
 129                 if (unlikely(r != 0)) {
 130                         DRM_ERROR("failed to unpin buffer after flip\n");
 131                 }
 132                 amdgpu_bo_unreserve(work->old_abo);
 133         } else
 134                 DRM_ERROR("failed to reserve buffer after flip\n");
 135
 136         amdgpu_bo_unref(&work->old_abo);
 137         kfree(work->shared);
 138         kfree(work);
 139 }
 140
 141
 142 static void amdgpu_flip_work_cleanup(struct amdgpu_flip_work *work)
 143 {
 144         int i;
 145
 146         amdgpu_bo_unref(&work->old_abo);
 147         dma_fence_put(work->excl);
 148         for (i = 0; i < work->shared_count; ++i)
 149                 dma_fence_put(work->shared[i]);
 150         kfree(work->shared);
 151         kfree(work);
 152 }
 153
 154 static void amdgpu_flip_cleanup_unreserve(struct amdgpu_flip_work *work,
 155                                           struct amdgpu_bo *new_abo)
 156 {
 157         amdgpu_bo_unreserve(new_abo);
 158         amdgpu_flip_work_cleanup(work);
 159 }
 160
 161 static void amdgpu_flip_cleanup_unpin(struct amdgpu_flip_work *work,
 162                                       struct amdgpu_bo *new_abo)
 163 {
 164         if (unlikely(amdgpu_bo_unpin(new_abo) != 0))
 165                 DRM_ERROR("failed to unpin new abo in error path\n");
 166         amdgpu_flip_cleanup_unreserve(work, new_abo);
 167 }
 168
 169 void amdgpu_crtc_cleanup_flip_ctx(struct amdgpu_flip_work *work,
 170                                   struct amdgpu_bo *new_abo)
 171 {
 172         if (unlikely(amdgpu_bo_reserve(new_abo, false) != 0)) {
 173                 DRM_ERROR("failed to reserve new abo in error path\n");
 174                 amdgpu_flip_work_cleanup(work);
 175                 return;
 176         }
 177         amdgpu_flip_cleanup_unpin(work, new_abo);
 178 }
 179
 180 int amdgpu_crtc_prepare_flip(struct drm_crtc *crtc,
 181                              struct drm_framebuffer *fb,
 182                              struct drm_pending_vblank_event *event,
 183                              uint32_t page_flip_flags,
 184                              uint32_t target,
 185                              struct amdgpu_flip_work **work_p,
 186                              struct amdgpu_bo **new_abo_p)
 187 {
 188         struct drm_device *dev = crtc->dev;
 189         struct amdgpu_device *adev = dev->dev_private;
 190         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 191         struct amdgpu_framebuffer *old_amdgpu_fb;
 192         struct amdgpu_framebuffer *new_amdgpu_fb;
 193         struct drm_gem_object *obj;
 194         struct amdgpu_flip_work *work;
 195         struct amdgpu_bo *new_abo;
 196         unsigned long flags;
 197         u64 tiling_flags;
 198         u64 base;
 199         int r;
 200
 201         work = kzalloc(sizeof *work, GFP_KERNEL);
 202         if (work == NULL)
 203                 return -ENOMEM;
 204
 205         INIT_DELAYED_WORK(&work->flip_work, amdgpu_flip_work_func);
 206         INIT_WORK(&work->unpin_work, amdgpu_unpin_work_func);
 207
 208         work->event = event;
 209         work->adev = adev;
 210         work->crtc_id = amdgpu_crtc->crtc_id;
 211         work->async = (page_flip_flags & DRM_MODE_PAGE_FLIP_ASYNC) != 0;
 212
 213         /* schedule unpin of the old buffer */
 214         old_amdgpu_fb = to_amdgpu_framebuffer(crtc->primary->fb);
 215         obj = old_amdgpu_fb->obj;
 216
 217         /* take a reference to the old object */
 218         work->old_abo = gem_to_amdgpu_bo(obj);
 219         amdgpu_bo_ref(work->old_abo);
 220
 221         new_amdgpu_fb = to_amdgpu_framebuffer(fb);
 222         obj = new_amdgpu_fb->obj;
 223         new_abo = gem_to_amdgpu_bo(obj);
 224
 225         /* pin the new buffer */
 226         r = amdgpu_bo_reserve(new_abo, false);
 227         if (unlikely(r != 0)) {
 228                 DRM_ERROR("failed to reserve new abo buffer before flip\n");
 229                 goto cleanup;
 230         }
 231
 232         r = amdgpu_bo_pin(new_abo, AMDGPU_GEM_DOMAIN_VRAM, &base);
 233         if (unlikely(r != 0)) {
 234                 DRM_ERROR("failed to pin new abo buffer before flip\n");
 235                 goto unreserve;
 236         }
 237
 238         r = reservation_object_get_fences_rcu(new_abo->tbo.resv, &work->excl,
 239                                               &work->shared_count,
 240                                               &work->shared);
 241         if (unlikely(r != 0)) {
 242                 DRM_ERROR("failed to get fences for buffer\n");
 243                 goto unpin;
 244         }
 245
 246         amdgpu_bo_get_tiling_flags(new_abo, &tiling_flags);
 247         amdgpu_bo_unreserve(new_abo);
 248
 249         work->base = base;
 250         work->target_vblank = target - drm_crtc_vblank_count(crtc) +
 251                 amdgpu_get_vblank_counter_kms(dev, work->crtc_id);
 252
 253         /* we borrow the event spin lock for protecting flip_wrok */
 254         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 255         if (amdgpu_crtc->pflip_status != AMDGPU_FLIP_NONE) {
 256                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
 257                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 258                 r = -EBUSY;
 259                 goto pflip_cleanup;
 260
 261         }
 262         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 263
 264         *work_p = work;
 265         *new_abo_p = new_abo;
 266
 267         return 0;
 268
 269 pflip_cleanup:
 270         amdgpu_crtc_cleanup_flip_ctx(work, new_abo);
 271         return r;
 272
 273 unpin:
 274         amdgpu_flip_cleanup_unpin(work, new_abo);
 275         return r;
 276
 277 unreserve:
 278         amdgpu_flip_cleanup_unreserve(work, new_abo);
 279         return r;
 280
 281 cleanup:
 282         amdgpu_flip_work_cleanup(work);
 283         return r;
 284
 285 }
 286
 287 void amdgpu_crtc_submit_flip(struct drm_crtc *crtc,
 288                              struct drm_framebuffer *fb,
 289                              struct amdgpu_flip_work *work,
 290                              struct amdgpu_bo *new_abo)
 291 {
 292         unsigned long flags;
 293         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 294
 295         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 296         amdgpu_crtc->pflip_status = AMDGPU_FLIP_PENDING;
 297         amdgpu_crtc->pflip_works = work;
 298
 299         /* update crtc fb */
 300         crtc->primary->fb = fb;
 301         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 302
 303         DRM_DEBUG_DRIVER(
 304                         "crtc:%d[%p], pflip_stat:AMDGPU_FLIP_PENDING, work: %p,\n",
 305                         amdgpu_crtc->crtc_id, amdgpu_crtc, work);
 306
 307         amdgpu_flip_work_func(&work->flip_work.work);
 308 }
 309
 310 int amdgpu_crtc_page_flip_target(struct drm_crtc *crtc,
 311                                  struct drm_framebuffer *fb,
 312                                  struct drm_pending_vblank_event *event,
 313                                  uint32_t page_flip_flags,
 314                                  uint32_t target)
 315 {
 316         struct amdgpu_bo *new_abo;
 317         struct amdgpu_flip_work *work;
 318         int r;
 319
 320         r = amdgpu_crtc_prepare_flip(crtc,
 321                                      fb,
 322                                      event,
 323                                      page_flip_flags,
 324                                      target,
 325                                      &work,
 326                                      &new_abo);
 327         if (r)
 328                 return r;
 329
 330         amdgpu_crtc_submit_flip(crtc, fb, work, new_abo);
 331
 332         return 0;
 333 }
 334
 335 int amdgpu_crtc_set_config(struct drm_mode_set *set)
 336 {
 337         struct drm_device *dev;
 338         struct amdgpu_device *adev;
 339         struct drm_crtc *crtc;
 340         bool active = false;
 341         int ret;
 342
 343         if (!set || !set->crtc)
 344                 return -EINVAL;
 345
 346         dev = set->crtc->dev;
 347
 348         ret = pm_runtime_get_sync(dev->dev);
 349         if (ret < 0)
 350                 return ret;
 351
 352         ret = drm_crtc_helper_set_config(set);
 353
 354         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 355                 if (crtc->enabled)
 356                         active = true;
 357
 358         pm_runtime_mark_last_busy(dev->dev);
 359
 360         adev = dev->dev_private;
 361         /* if we have active crtcs and we don't have a power ref,
 362            take the current one */
 363         if (active && !adev->have_disp_power_ref) {
 364                 adev->have_disp_power_ref = true;
 365                 return ret;
 366         }
 367         /* if we have no active crtcs, then drop the power ref
 368            we got before */
 369         if (!active && adev->have_disp_power_ref) {
 370                 pm_runtime_put_autosuspend(dev->dev);
 371                 adev->have_disp_power_ref = false;
 372         }
 373
 374         /* drop the power reference we got coming in here */
 375         pm_runtime_put_autosuspend(dev->dev);
 376         return ret;
 377 }
 378
 379 static const char *encoder_names[41] = {
 380         "NONE",
 381         "INTERNAL_LVDS",
 382         "INTERNAL_TMDS1",
 383         "INTERNAL_TMDS2",
 384         "INTERNAL_DAC1",
 385         "INTERNAL_DAC2",
 386         "INTERNAL_SDVOA",
 387         "INTERNAL_SDVOB",
 388         "SI170B",
 389         "CH7303",
 390         "CH7301",
 391         "INTERNAL_DVO1",
 392         "EXTERNAL_SDVOA",
 393         "EXTERNAL_SDVOB",
 394         "TITFP513",
 395         "INTERNAL_LVTM1",
 396         "VT1623",
 397         "HDMI_SI1930",
 398         "HDMI_INTERNAL",
 399         "INTERNAL_KLDSCP_TMDS1",
 400         "INTERNAL_KLDSCP_DVO1",
 401         "INTERNAL_KLDSCP_DAC1",
 402         "INTERNAL_KLDSCP_DAC2",
 403         "SI178",
 404         "MVPU_FPGA",
 405         "INTERNAL_DDI",
 406         "VT1625",
 407         "HDMI_SI1932",
 408         "DP_AN9801",
 409         "DP_DP501",
 410         "INTERNAL_UNIPHY",
 411         "INTERNAL_KLDSCP_LVTMA",
 412         "INTERNAL_UNIPHY1",
 413         "INTERNAL_UNIPHY2",
 414         "NUTMEG",
 415         "TRAVIS",
 416         "INTERNAL_VCE",
 417         "INTERNAL_UNIPHY3",
 418         "HDMI_ANX9805",
 419         "INTERNAL_AMCLK",
 420         "VIRTUAL",
 421 };
 422
 423 static const char *hpd_names[6] = {
 424         "HPD1",
 425         "HPD2",
 426         "HPD3",
 427         "HPD4",
 428         "HPD5",
 429         "HPD6",
 430 };
 431
 432 void amdgpu_print_display_setup(struct drm_device *dev)
 433 {
 434         struct drm_connector *connector;
 435         struct amdgpu_connector *amdgpu_connector;
 436         struct drm_encoder *encoder;
 437         struct amdgpu_encoder *amdgpu_encoder;
 438         uint32_t devices;
 439         int i = 0;
 440
 441         DRM_INFO("AMDGPU Display Connectors\n");
 442         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 443                 amdgpu_connector = to_amdgpu_connector(connector);
 444                 DRM_INFO("Connector %d:\n", i);
 445                 DRM_INFO("  %s\n", connector->name);
 446                 if (amdgpu_connector->hpd.hpd != AMDGPU_HPD_NONE)
 447                         DRM_INFO("  %s\n", hpd_names[amdgpu_connector->hpd.hpd]);
 448                 if (amdgpu_connector->ddc_bus) {
 449                         DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
 450                                  amdgpu_connector->ddc_bus->rec.mask_clk_reg,
 451                                  amdgpu_connector->ddc_bus->rec.mask_data_reg,
 452                                  amdgpu_connector->ddc_bus->rec.a_clk_reg,
 453                                  amdgpu_connector->ddc_bus->rec.a_data_reg,
 454                                  amdgpu_connector->ddc_bus->rec.en_clk_reg,
 455                                  amdgpu_connector->ddc_bus->rec.en_data_reg,
 456                                  amdgpu_connector->ddc_bus->rec.y_clk_reg,
 457                                  amdgpu_connector->ddc_bus->rec.y_data_reg);
 458                         if (amdgpu_connector->router.ddc_valid)
 459                                 DRM_INFO("  DDC Router 0x%x/0x%x\n",
 460                                          amdgpu_connector->router.ddc_mux_control_pin,
 461                                          amdgpu_connector->router.ddc_mux_state);
 462                         if (amdgpu_connector->router.cd_valid)
 463                                 DRM_INFO("  Clock/Data Router 0x%x/0x%x\n",
 464                                          amdgpu_connector->router.cd_mux_control_pin,
 465                                          amdgpu_connector->router.cd_mux_state);
 466                 } else {
 467                         if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
 468                             connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
 469                             connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
 470                             connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
 471                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
 472                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
 473                                 DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to [email protected]\n");
 474                 }
 475                 DRM_INFO("  Encoders:\n");
 476                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 477                         amdgpu_encoder = to_amdgpu_encoder(encoder);
 478                         devices = amdgpu_encoder->devices & amdgpu_connector->devices;
 479                         if (devices) {
 480                                 if (devices & ATOM_DEVICE_CRT1_SUPPORT)
 481                                         DRM_INFO("    CRT1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 482                                 if (devices & ATOM_DEVICE_CRT2_SUPPORT)
 483                                         DRM_INFO("    CRT2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 484                                 if (devices & ATOM_DEVICE_LCD1_SUPPORT)
 485                                         DRM_INFO("    LCD1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 486                                 if (devices & ATOM_DEVICE_DFP1_SUPPORT)
 487                                         DRM_INFO("    DFP1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 488                                 if (devices & ATOM_DEVICE_DFP2_SUPPORT)
 489                                         DRM_INFO("    DFP2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 490                                 if (devices & ATOM_DEVICE_DFP3_SUPPORT)
 491                                         DRM_INFO("    DFP3: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 492                                 if (devices & ATOM_DEVICE_DFP4_SUPPORT)
 493                                         DRM_INFO("    DFP4: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 494                                 if (devices & ATOM_DEVICE_DFP5_SUPPORT)
 495                                         DRM_INFO("    DFP5: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 496                                 if (devices & ATOM_DEVICE_DFP6_SUPPORT)
 497                                         DRM_INFO("    DFP6: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 498                                 if (devices & ATOM_DEVICE_TV1_SUPPORT)
 499                                         DRM_INFO("    TV1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 500                                 if (devices & ATOM_DEVICE_CV_SUPPORT)
 501                                         DRM_INFO("    CV: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 502                         }
 503                 }
 504                 i++;
 505         }
 506 }
 507
 508 /**
 509  * amdgpu_ddc_probe
 510  *
 511  */
 512 bool amdgpu_ddc_probe(struct amdgpu_connector *amdgpu_connector,
 513                        bool use_aux)
 514 {
 515         u8 out = 0x0;
 516         u8 buf[8];
 517         int ret;
 518         struct i2c_msg msgs[] = {
 519                 {
 520                         .addr = DDC_ADDR,
 521                         .flags = 0,
 522                         .len = 1,
 523                         .buf = &out,
 524                 },
 525                 {
 526                         .addr = DDC_ADDR,
 527                         .flags = I2C_M_RD,
 528                         .len = 8,
 529                         .buf = buf,
 530                 }
 531         };
 532
 533         /* on hw with routers, select right port */
 534         if (amdgpu_connector->router.ddc_valid)
 535                 amdgpu_i2c_router_select_ddc_port(amdgpu_connector);
 536
 537         if (use_aux) {
 538                 ret = i2c_transfer(&amdgpu_connector->ddc_bus->aux.ddc, msgs, 2);
 539         } else {
 540                 ret = i2c_transfer(&amdgpu_connector->ddc_bus->adapter, msgs, 2);
 541         }
 542
 543         if (ret != 2)
 544                 /* Couldn't find an accessible DDC on this connector */
 545                 return false;
 546         /* Probe also for valid EDID header
 547          * EDID header starts with:
 548          * 0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00.
 549          * Only the first 6 bytes must be valid as
 550          * drm_edid_block_valid() can fix the last 2 bytes */
 551         if (drm_edid_header_is_valid(buf) < 6) {
 552                 /* Couldn't find an accessible EDID on this
 553                  * connector */
 554                 return false;
 555         }
 556         return true;
 557 }
 558
 559 static void amdgpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
 560 {
 561         struct amdgpu_framebuffer *amdgpu_fb = to_amdgpu_framebuffer(fb);
 562
 563         drm_gem_object_unreference_unlocked(amdgpu_fb->obj);
 564         drm_framebuffer_cleanup(fb);
 565         kfree(amdgpu_fb);
 566 }
 567
 568 static int amdgpu_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 569                                                   struct drm_file *file_priv,
 570                                                   unsigned int *handle)
 571 {
 572         struct amdgpu_framebuffer *amdgpu_fb = to_amdgpu_framebuffer(fb);
 573
 574         return drm_gem_handle_create(file_priv, amdgpu_fb->obj, handle);
 575 }
 576
 577 static const struct drm_framebuffer_funcs amdgpu_fb_funcs = {
 578         .destroy = amdgpu_user_framebuffer_destroy,
 579         .create_handle = amdgpu_user_framebuffer_create_handle,
 580 };
 581
 582 int
 583 amdgpu_framebuffer_init(struct drm_device *dev,
 584                         struct amdgpu_framebuffer *rfb,
 585                         const struct drm_mode_fb_cmd2 *mode_cmd,
 586                         struct drm_gem_object *obj)
 587 {
 588         int ret;
 589         rfb->obj = obj;
 590         drm_helper_mode_fill_fb_struct(dev, &rfb->base, mode_cmd);
 591         ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
 592         if (ret) {
 593                 rfb->obj = NULL;
 594                 return ret;
 595         }
 596         return 0;
 597 }
 598
 599 static struct drm_framebuffer *
 600 amdgpu_user_framebuffer_create(struct drm_device *dev,
 601                                struct drm_file *file_priv,
 602                                const struct drm_mode_fb_cmd2 *mode_cmd)
 603 {
 604         struct drm_gem_object *obj;
 605         struct amdgpu_framebuffer *amdgpu_fb;
 606         int ret;
 607
 608         obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
 609         if (obj ==  NULL) {
 610                 dev_err(&dev->pdev->dev, "No GEM object associated to handle 0x%08X, "
 611                         "can't create framebuffer\n", mode_cmd->handles[0]);
 612                 return ERR_PTR(-ENOENT);
 613         }
 614
 615         amdgpu_fb = kzalloc(sizeof(*amdgpu_fb), GFP_KERNEL);
 616         if (amdgpu_fb == NULL) {
 617                 drm_gem_object_unreference_unlocked(obj);
 618                 return ERR_PTR(-ENOMEM);
 619         }
 620
 621         ret = amdgpu_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
 622         if (ret) {
 623                 kfree(amdgpu_fb);
 624                 drm_gem_object_unreference_unlocked(obj);
 625                 return ERR_PTR(ret);
 626         }
 627
 628         return &amdgpu_fb->base;
 629 }
 630
 631 static void amdgpu_output_poll_changed(struct drm_device *dev)
 632 {
 633         struct amdgpu_device *adev = dev->dev_private;
 634         amdgpu_fb_output_poll_changed(adev);
 635 }
 636
 637 const struct drm_mode_config_funcs amdgpu_mode_funcs = {
 638         .fb_create = amdgpu_user_framebuffer_create,
 639         .output_poll_changed = amdgpu_output_poll_changed
 640 };
 641
 642 static const struct drm_prop_enum_list amdgpu_underscan_enum_list[] =
 643 {       { UNDERSCAN_OFF, "off" },
 644         { UNDERSCAN_ON, "on" },
 645         { UNDERSCAN_AUTO, "auto" },
 646 };
 647
 648 static const struct drm_prop_enum_list amdgpu_audio_enum_list[] =
 649 {       { AMDGPU_AUDIO_DISABLE, "off" },
 650         { AMDGPU_AUDIO_ENABLE, "on" },
 651         { AMDGPU_AUDIO_AUTO, "auto" },
 652 };
 653
 654 /* XXX support different dither options? spatial, temporal, both, etc. */
 655 static const struct drm_prop_enum_list amdgpu_dither_enum_list[] =
 656 {       { AMDGPU_FMT_DITHER_DISABLE, "off" },
 657         { AMDGPU_FMT_DITHER_ENABLE, "on" },
 658 };
 659
 660 int amdgpu_modeset_create_props(struct amdgpu_device *adev)
 661 {
 662         int sz;
 663
 664         adev->mode_info.coherent_mode_property =
 665                 drm_property_create_range(adev->ddev, 0 , "coherent", 0, 1);
 666         if (!adev->mode_info.coherent_mode_property)
 667                 return -ENOMEM;
 668
 669         adev->mode_info.load_detect_property =
 670                 drm_property_create_range(adev->ddev, 0, "load detection", 0, 1);
 671         if (!adev->mode_info.load_detect_property)
 672                 return -ENOMEM;
 673
 674         drm_mode_create_scaling_mode_property(adev->ddev);
 675
 676         sz = ARRAY_SIZE(amdgpu_underscan_enum_list);
 677         adev->mode_info.underscan_property =
 678                 drm_property_create_enum(adev->ddev, 0,
 679                                     "underscan",
 680                                     amdgpu_underscan_enum_list, sz);
 681
 682         adev->mode_info.underscan_hborder_property =
 683                 drm_property_create_range(adev->ddev, 0,
 684                                         "underscan hborder", 0, 128);
 685         if (!adev->mode_info.underscan_hborder_property)
 686                 return -ENOMEM;
 687
 688         adev->mode_info.underscan_vborder_property =
 689                 drm_property_create_range(adev->ddev, 0,
 690                                         "underscan vborder", 0, 128);
 691         if (!adev->mode_info.underscan_vborder_property)
 692                 return -ENOMEM;
 693
 694         sz = ARRAY_SIZE(amdgpu_audio_enum_list);
 695         adev->mode_info.audio_property =
 696                 drm_property_create_enum(adev->ddev, 0,
 697                                          "audio",
 698                                          amdgpu_audio_enum_list, sz);
 699
 700         sz = ARRAY_SIZE(amdgpu_dither_enum_list);
 701         adev->mode_info.dither_property =
 702                 drm_property_create_enum(adev->ddev, 0,
 703                                          "dither",
 704                                          amdgpu_dither_enum_list, sz);
 705
 706         return 0;
 707 }
 708
 709 void amdgpu_update_display_priority(struct amdgpu_device *adev)
 710 {
 711         /* adjustment options for the display watermarks */
 712         if ((amdgpu_disp_priority == 0) || (amdgpu_disp_priority > 2))
 713                 adev->mode_info.disp_priority = 0;
 714         else
 715                 adev->mode_info.disp_priority = amdgpu_disp_priority;
 716
 717 }
 718
 719 static bool is_hdtv_mode(const struct drm_display_mode *mode)
 720 {
 721         /* try and guess if this is a tv or a monitor */
 722         if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
 723             (mode->vdisplay == 576) || /* 576p */
 724             (mode->vdisplay == 720) || /* 720p */
 725             (mode->vdisplay == 1080)) /* 1080p */
 726                 return true;
 727         else
 728                 return false;
 729 }
 730
 731 bool amdgpu_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
 732                                     const struct drm_display_mode *mode,
 733                                     struct drm_display_mode *adjusted_mode)
 734 {
 735         struct drm_device *dev = crtc->dev;
 736         struct drm_encoder *encoder;
 737         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 738         struct amdgpu_encoder *amdgpu_encoder;
 739         struct drm_connector *connector;
 740         struct amdgpu_connector *amdgpu_connector;
 741         u32 src_v = 1, dst_v = 1;
 742         u32 src_h = 1, dst_h = 1;
 743
 744         amdgpu_crtc->h_border = 0;
 745         amdgpu_crtc->v_border = 0;
 746
 747         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 748                 if (encoder->crtc != crtc)
 749                         continue;
 750                 amdgpu_encoder = to_amdgpu_encoder(encoder);
 751                 connector = amdgpu_get_connector_for_encoder(encoder);
 752                 amdgpu_connector = to_amdgpu_connector(connector);
 753
 754                 /* set scaling */
 755                 if (amdgpu_encoder->rmx_type == RMX_OFF)
 756                         amdgpu_crtc->rmx_type = RMX_OFF;
 757                 else if (mode->hdisplay < amdgpu_encoder->native_mode.hdisplay ||
 758                          mode->vdisplay < amdgpu_encoder->native_mode.vdisplay)
 759                         amdgpu_crtc->rmx_type = amdgpu_encoder->rmx_type;
 760                 else
 761                         amdgpu_crtc->rmx_type = RMX_OFF;
 762                 /* copy native mode */
 763                 memcpy(&amdgpu_crtc->native_mode,
 764                        &amdgpu_encoder->native_mode,
 765                        sizeof(struct drm_display_mode));
 766                 src_v = crtc->mode.vdisplay;
 767                 dst_v = amdgpu_crtc->native_mode.vdisplay;
 768                 src_h = crtc->mode.hdisplay;
 769                 dst_h = amdgpu_crtc->native_mode.hdisplay;
 770
 771                 /* fix up for overscan on hdmi */
 772                 if ((!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
 773                     ((amdgpu_encoder->underscan_type == UNDERSCAN_ON) ||
 774                      ((amdgpu_encoder->underscan_type == UNDERSCAN_AUTO) &&
 775                       drm_detect_hdmi_monitor(amdgpu_connector_edid(connector)) &&
 776                       is_hdtv_mode(mode)))) {
 777                         if (amdgpu_encoder->underscan_hborder != 0)
 778                                 amdgpu_crtc->h_border = amdgpu_encoder->underscan_hborder;
 779                         else
 780                                 amdgpu_crtc->h_border = (mode->hdisplay >> 5) + 16;
 781                         if (amdgpu_encoder->underscan_vborder != 0)
 782                                 amdgpu_crtc->v_border = amdgpu_encoder->underscan_vborder;
 783                         else
 784                                 amdgpu_crtc->v_border = (mode->vdisplay >> 5) + 16;
 785                         amdgpu_crtc->rmx_type = RMX_FULL;
 786                         src_v = crtc->mode.vdisplay;
 787                         dst_v = crtc->mode.vdisplay - (amdgpu_crtc->v_border * 2);
 788                         src_h = crtc->mode.hdisplay;
 789                         dst_h = crtc->mode.hdisplay - (amdgpu_crtc->h_border * 2);
 790                 }
 791         }
 792         if (amdgpu_crtc->rmx_type != RMX_OFF) {
 793                 fixed20_12 a, b;
 794                 a.full = dfixed_const(src_v);
 795                 b.full = dfixed_const(dst_v);
 796                 amdgpu_crtc->vsc.full = dfixed_div(a, b);
 797                 a.full = dfixed_const(src_h);
 798                 b.full = dfixed_const(dst_h);
 799                 amdgpu_crtc->hsc.full = dfixed_div(a, b);
 800         } else {
 801                 amdgpu_crtc->vsc.full = dfixed_const(1);
 802                 amdgpu_crtc->hsc.full = dfixed_const(1);
 803         }
 804         return true;
 805 }
 806
 807 /*
 808  * Retrieve current video scanout position of crtc on a given gpu, and
 809  * an optional accurate timestamp of when query happened.
 810  *
 811  * \param dev Device to query.
 812  * \param pipe Crtc to query.
 813  * \param flags Flags from caller (DRM_CALLED_FROM_VBLIRQ or 0).
 814  *              For driver internal use only also supports these flags:
 815  *
 816  *              USE_REAL_VBLANKSTART to use the real start of vblank instead
 817  *              of a fudged earlier start of vblank.
 818  *
 819  *              GET_DISTANCE_TO_VBLANKSTART to return distance to the
 820  *              fudged earlier start of vblank in *vpos and the distance
 821  *              to true start of vblank in *hpos.
 822  *
 823  * \param *vpos Location where vertical scanout position should be stored.
 824  * \param *hpos Location where horizontal scanout position should go.
 825  * \param *stime Target location for timestamp taken immediately before
 826  *               scanout position query. Can be NULL to skip timestamp.
 827  * \param *etime Target location for timestamp taken immediately after
 828  *               scanout position query. Can be NULL to skip timestamp.
 829  *
 830  * Returns vpos as a positive number while in active scanout area.
 831  * Returns vpos as a negative number inside vblank, counting the number
 832  * of scanlines to go until end of vblank, e.g., -1 means "one scanline
 833  * until start of active scanout / end of vblank."
 834  *
 835  * \return Flags, or'ed together as follows:
 836  *
 837  * DRM_SCANOUTPOS_VALID = Query successful.
 838  * DRM_SCANOUTPOS_INVBL = Inside vblank.
 839  * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
 840  * this flag means that returned position may be offset by a constant but
 841  * unknown small number of scanlines wrt. real scanout position.
 842  *
 843  */
 844 int amdgpu_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
 845                                unsigned int flags, int *vpos, int *hpos,
 846                                ktime_t *stime, ktime_t *etime,
 847                                const struct drm_display_mode *mode)
 848 {
 849         u32 vbl = 0, position = 0;
 850         int vbl_start, vbl_end, vtotal, ret = 0;
 851         bool in_vbl = true;
 852
 853         struct amdgpu_device *adev = dev->dev_private;
 854
 855         /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
 856
 857         /* Get optional system timestamp before query. */
 858         if (stime)
 859                 *stime = ktime_get();
 860
 861         if (amdgpu_display_page_flip_get_scanoutpos(adev, pipe, &vbl, &position) == 0)
 862                 ret |= DRM_SCANOUTPOS_VALID;
 863
 864         /* Get optional system timestamp after query. */
 865         if (etime)
 866                 *etime = ktime_get();
 867
 868         /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
 869
 870         /* Decode into vertical and horizontal scanout position. */
 871         *vpos = position & 0x1fff;
 872         *hpos = (position >> 16) & 0x1fff;
 873
 874         /* Valid vblank area boundaries from gpu retrieved? */
 875         if (vbl > 0) {
 876                 /* Yes: Decode. */
 877                 ret |= DRM_SCANOUTPOS_ACCURATE;
 878                 vbl_start = vbl & 0x1fff;
 879                 vbl_end = (vbl >> 16) & 0x1fff;
 880         }
 881         else {
 882                 /* No: Fake something reasonable which gives at least ok results. */
 883                 vbl_start = mode->crtc_vdisplay;
 884                 vbl_end = 0;
 885         }
 886
 887         /* Called from driver internal vblank counter query code? */
 888         if (flags & GET_DISTANCE_TO_VBLANKSTART) {
 889             /* Caller wants distance from real vbl_start in *hpos */
 890             *hpos = *vpos - vbl_start;
 891         }
 892
 893         /* Fudge vblank to start a few scanlines earlier to handle the
 894          * problem that vblank irqs fire a few scanlines before start
 895          * of vblank. Some driver internal callers need the true vblank
 896          * start to be used and signal this via the USE_REAL_VBLANKSTART flag.
 897          *
 898          * The cause of the "early" vblank irq is that the irq is triggered
 899          * by the line buffer logic when the line buffer read position enters
 900          * the vblank, whereas our crtc scanout position naturally lags the
 901          * line buffer read position.
 902          */
 903         if (!(flags & USE_REAL_VBLANKSTART))
 904                 vbl_start -= adev->mode_info.crtcs[pipe]->lb_vblank_lead_lines;
 905
 906         /* Test scanout position against vblank region. */
 907         if ((*vpos < vbl_start) && (*vpos >= vbl_end))
 908                 in_vbl = false;
 909
 910         /* In vblank? */
 911         if (in_vbl)
 912             ret |= DRM_SCANOUTPOS_IN_VBLANK;
 913
 914         /* Called from driver internal vblank counter query code? */
 915         if (flags & GET_DISTANCE_TO_VBLANKSTART) {
 916                 /* Caller wants distance from fudged earlier vbl_start */
 917                 *vpos -= vbl_start;
 918                 return ret;
 919         }
 920
 921         /* Check if inside vblank area and apply corrective offsets:
 922          * vpos will then be >=0 in video scanout area, but negative
 923          * within vblank area, counting down the number of lines until
 924          * start of scanout.
 925          */
 926
 927         /* Inside "upper part" of vblank area? Apply corrective offset if so: */
 928         if (in_vbl && (*vpos >= vbl_start)) {
 929                 vtotal = mode->crtc_vtotal;
 930                 *vpos = *vpos - vtotal;
 931         }
 932
 933         /* Correct for shifted end of vbl at vbl_end. */
 934         *vpos = *vpos - vbl_end;
 935
 936         return ret;
 937 }
 938
 939 int amdgpu_crtc_idx_to_irq_type(struct amdgpu_device *adev, int crtc)
 940 {
 941         if (crtc < 0 || crtc >= adev->mode_info.num_crtc)
 942                 return AMDGPU_CRTC_IRQ_NONE;
 943
 944         switch (crtc) {
 945         case 0:
 946                 return AMDGPU_CRTC_IRQ_VBLANK1;
 947         case 1:
 948                 return AMDGPU_CRTC_IRQ_VBLANK2;
 949         case 2:
 950                 return AMDGPU_CRTC_IRQ_VBLANK3;
 951         case 3:
 952                 return AMDGPU_CRTC_IRQ_VBLANK4;
 953         case 4:
 954                 return AMDGPU_CRTC_IRQ_VBLANK5;
 955         case 5:
 956                 return AMDGPU_CRTC_IRQ_VBLANK6;
 957         default:
 958                 return AMDGPU_CRTC_IRQ_NONE;
 959         }
 960 }