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                                  struct drm_modeset_acquire_ctx *ctx)
 316 {
 317         struct amdgpu_bo *new_abo;
 318         struct amdgpu_flip_work *work;
 319         int r;
 320
 321         r = amdgpu_crtc_prepare_flip(crtc,
 322                                      fb,
 323                                      event,
 324                                      page_flip_flags,
 325                                      target,
 326                                      &work,
 327                                      &new_abo);
 328         if (r)
 329                 return r;
 330
 331         amdgpu_crtc_submit_flip(crtc, fb, work, new_abo);
 332
 333         return 0;
 334 }
 335
 336 int amdgpu_crtc_set_config(struct drm_mode_set *set,
 337                            struct drm_modeset_acquire_ctx *ctx)
 338 {
 339         struct drm_device *dev;
 340         struct amdgpu_device *adev;
 341         struct drm_crtc *crtc;
 342         bool active = false;
 343         int ret;
 344
 345         if (!set || !set->crtc)
 346                 return -EINVAL;
 347
 348         dev = set->crtc->dev;
 349
 350         ret = pm_runtime_get_sync(dev->dev);
 351         if (ret < 0)
 352                 return ret;
 353
 354         ret = drm_crtc_helper_set_config(set, ctx);
 355
 356         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 357                 if (crtc->enabled)
 358                         active = true;
 359
 360         pm_runtime_mark_last_busy(dev->dev);
 361
 362         adev = dev->dev_private;
 363         /* if we have active crtcs and we don't have a power ref,
 364            take the current one */
 365         if (active && !adev->have_disp_power_ref) {
 366                 adev->have_disp_power_ref = true;
 367                 return ret;
 368         }
 369         /* if we have no active crtcs, then drop the power ref
 370            we got before */
 371         if (!active && adev->have_disp_power_ref) {
 372                 pm_runtime_put_autosuspend(dev->dev);
 373                 adev->have_disp_power_ref = false;
 374         }
 375
 376         /* drop the power reference we got coming in here */
 377         pm_runtime_put_autosuspend(dev->dev);
 378         return ret;
 379 }
 380
 381 static const char *encoder_names[41] = {
 382         "NONE",
 383         "INTERNAL_LVDS",
 384         "INTERNAL_TMDS1",
 385         "INTERNAL_TMDS2",
 386         "INTERNAL_DAC1",
 387         "INTERNAL_DAC2",
 388         "INTERNAL_SDVOA",
 389         "INTERNAL_SDVOB",
 390         "SI170B",
 391         "CH7303",
 392         "CH7301",
 393         "INTERNAL_DVO1",
 394         "EXTERNAL_SDVOA",
 395         "EXTERNAL_SDVOB",
 396         "TITFP513",
 397         "INTERNAL_LVTM1",
 398         "VT1623",
 399         "HDMI_SI1930",
 400         "HDMI_INTERNAL",
 401         "INTERNAL_KLDSCP_TMDS1",
 402         "INTERNAL_KLDSCP_DVO1",
 403         "INTERNAL_KLDSCP_DAC1",
 404         "INTERNAL_KLDSCP_DAC2",
 405         "SI178",
 406         "MVPU_FPGA",
 407         "INTERNAL_DDI",
 408         "VT1625",
 409         "HDMI_SI1932",
 410         "DP_AN9801",
 411         "DP_DP501",
 412         "INTERNAL_UNIPHY",
 413         "INTERNAL_KLDSCP_LVTMA",
 414         "INTERNAL_UNIPHY1",
 415         "INTERNAL_UNIPHY2",
 416         "NUTMEG",
 417         "TRAVIS",
 418         "INTERNAL_VCE",
 419         "INTERNAL_UNIPHY3",
 420         "HDMI_ANX9805",
 421         "INTERNAL_AMCLK",
 422         "VIRTUAL",
 423 };
 424
 425 static const char *hpd_names[6] = {
 426         "HPD1",
 427         "HPD2",
 428         "HPD3",
 429         "HPD4",
 430         "HPD5",
 431         "HPD6",
 432 };
 433
 434 void amdgpu_print_display_setup(struct drm_device *dev)
 435 {
 436         struct drm_connector *connector;
 437         struct amdgpu_connector *amdgpu_connector;
 438         struct drm_encoder *encoder;
 439         struct amdgpu_encoder *amdgpu_encoder;
 440         uint32_t devices;
 441         int i = 0;
 442
 443         DRM_INFO("AMDGPU Display Connectors\n");
 444         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 445                 amdgpu_connector = to_amdgpu_connector(connector);
 446                 DRM_INFO("Connector %d:\n", i);
 447                 DRM_INFO("  %s\n", connector->name);
 448                 if (amdgpu_connector->hpd.hpd != AMDGPU_HPD_NONE)
 449                         DRM_INFO("  %s\n", hpd_names[amdgpu_connector->hpd.hpd]);
 450                 if (amdgpu_connector->ddc_bus) {
 451                         DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
 452                                  amdgpu_connector->ddc_bus->rec.mask_clk_reg,
 453                                  amdgpu_connector->ddc_bus->rec.mask_data_reg,
 454                                  amdgpu_connector->ddc_bus->rec.a_clk_reg,
 455                                  amdgpu_connector->ddc_bus->rec.a_data_reg,
 456                                  amdgpu_connector->ddc_bus->rec.en_clk_reg,
 457                                  amdgpu_connector->ddc_bus->rec.en_data_reg,
 458                                  amdgpu_connector->ddc_bus->rec.y_clk_reg,
 459                                  amdgpu_connector->ddc_bus->rec.y_data_reg);
 460                         if (amdgpu_connector->router.ddc_valid)
 461                                 DRM_INFO("  DDC Router 0x%x/0x%x\n",
 462                                          amdgpu_connector->router.ddc_mux_control_pin,
 463                                          amdgpu_connector->router.ddc_mux_state);
 464                         if (amdgpu_connector->router.cd_valid)
 465                                 DRM_INFO("  Clock/Data Router 0x%x/0x%x\n",
 466                                          amdgpu_connector->router.cd_mux_control_pin,
 467                                          amdgpu_connector->router.cd_mux_state);
 468                 } else {
 469                         if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
 470                             connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
 471                             connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
 472                             connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
 473                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
 474                             connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
 475                                 DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to [email protected]\n");
 476                 }
 477                 DRM_INFO("  Encoders:\n");
 478                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 479                         amdgpu_encoder = to_amdgpu_encoder(encoder);
 480                         devices = amdgpu_encoder->devices & amdgpu_connector->devices;
 481                         if (devices) {
 482                                 if (devices & ATOM_DEVICE_CRT1_SUPPORT)
 483                                         DRM_INFO("    CRT1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 484                                 if (devices & ATOM_DEVICE_CRT2_SUPPORT)
 485                                         DRM_INFO("    CRT2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 486                                 if (devices & ATOM_DEVICE_LCD1_SUPPORT)
 487                                         DRM_INFO("    LCD1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 488                                 if (devices & ATOM_DEVICE_DFP1_SUPPORT)
 489                                         DRM_INFO("    DFP1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 490                                 if (devices & ATOM_DEVICE_DFP2_SUPPORT)
 491                                         DRM_INFO("    DFP2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 492                                 if (devices & ATOM_DEVICE_DFP3_SUPPORT)
 493                                         DRM_INFO("    DFP3: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 494                                 if (devices & ATOM_DEVICE_DFP4_SUPPORT)
 495                                         DRM_INFO("    DFP4: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 496                                 if (devices & ATOM_DEVICE_DFP5_SUPPORT)
 497                                         DRM_INFO("    DFP5: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 498                                 if (devices & ATOM_DEVICE_DFP6_SUPPORT)
 499                                         DRM_INFO("    DFP6: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 500                                 if (devices & ATOM_DEVICE_TV1_SUPPORT)
 501                                         DRM_INFO("    TV1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 502                                 if (devices & ATOM_DEVICE_CV_SUPPORT)
 503                                         DRM_INFO("    CV: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
 504                         }
 505                 }
 506                 i++;
 507         }
 508 }
 509
 510 /**
 511  * amdgpu_ddc_probe
 512  *
 513  */
 514 bool amdgpu_ddc_probe(struct amdgpu_connector *amdgpu_connector,
 515                        bool use_aux)
 516 {
 517         u8 out = 0x0;
 518         u8 buf[8];
 519         int ret;
 520         struct i2c_msg msgs[] = {
 521                 {
 522                         .addr = DDC_ADDR,
 523                         .flags = 0,
 524                         .len = 1,
 525                         .buf = &out,
 526                 },
 527                 {
 528                         .addr = DDC_ADDR,
 529                         .flags = I2C_M_RD,
 530                         .len = 8,
 531                         .buf = buf,
 532                 }
 533         };
 534
 535         /* on hw with routers, select right port */
 536         if (amdgpu_connector->router.ddc_valid)
 537                 amdgpu_i2c_router_select_ddc_port(amdgpu_connector);
 538
 539         if (use_aux) {
 540                 ret = i2c_transfer(&amdgpu_connector->ddc_bus->aux.ddc, msgs, 2);
 541         } else {
 542                 ret = i2c_transfer(&amdgpu_connector->ddc_bus->adapter, msgs, 2);
 543         }
 544
 545         if (ret != 2)
 546                 /* Couldn't find an accessible DDC on this connector */
 547                 return false;
 548         /* Probe also for valid EDID header
 549          * EDID header starts with:
 550          * 0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00.
 551          * Only the first 6 bytes must be valid as
 552          * drm_edid_block_valid() can fix the last 2 bytes */
 553         if (drm_edid_header_is_valid(buf) < 6) {
 554                 /* Couldn't find an accessible EDID on this
 555                  * connector */
 556                 return false;
 557         }
 558         return true;
 559 }
 560
 561 static void amdgpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
 562 {
 563         struct amdgpu_framebuffer *amdgpu_fb = to_amdgpu_framebuffer(fb);
 564
 565         drm_gem_object_unreference_unlocked(amdgpu_fb->obj);
 566         drm_framebuffer_cleanup(fb);
 567         kfree(amdgpu_fb);
 568 }
 569
 570 static int amdgpu_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 571                                                   struct drm_file *file_priv,
 572                                                   unsigned int *handle)
 573 {
 574         struct amdgpu_framebuffer *amdgpu_fb = to_amdgpu_framebuffer(fb);
 575
 576         return drm_gem_handle_create(file_priv, amdgpu_fb->obj, handle);
 577 }
 578
 579 static const struct drm_framebuffer_funcs amdgpu_fb_funcs = {
 580         .destroy = amdgpu_user_framebuffer_destroy,
 581         .create_handle = amdgpu_user_framebuffer_create_handle,
 582 };
 583
 584 int
 585 amdgpu_framebuffer_init(struct drm_device *dev,
 586                         struct amdgpu_framebuffer *rfb,
 587                         const struct drm_mode_fb_cmd2 *mode_cmd,
 588                         struct drm_gem_object *obj)
 589 {
 590         int ret;
 591         rfb->obj = obj;
 592         drm_helper_mode_fill_fb_struct(dev, &rfb->base, mode_cmd);
 593         ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
 594         if (ret) {
 595                 rfb->obj = NULL;
 596                 return ret;
 597         }
 598         return 0;
 599 }
 600
 601 static struct drm_framebuffer *
 602 amdgpu_user_framebuffer_create(struct drm_device *dev,
 603                                struct drm_file *file_priv,
 604                                const struct drm_mode_fb_cmd2 *mode_cmd)
 605 {
 606         struct drm_gem_object *obj;
 607         struct amdgpu_framebuffer *amdgpu_fb;
 608         int ret;
 609
 610         obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
 611         if (obj ==  NULL) {
 612                 dev_err(&dev->pdev->dev, "No GEM object associated to handle 0x%08X, "
 613                         "can't create framebuffer\n", mode_cmd->handles[0]);
 614                 return ERR_PTR(-ENOENT);
 615         }
 616
 617         /* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */
 618         if (obj->import_attach) {
 619                 DRM_DEBUG_KMS("Cannot create framebuffer from imported dma_buf\n");
 620                 return ERR_PTR(-EINVAL);
 621         }
 622
 623         amdgpu_fb = kzalloc(sizeof(*amdgpu_fb), GFP_KERNEL);
 624         if (amdgpu_fb == NULL) {
 625                 drm_gem_object_unreference_unlocked(obj);
 626                 return ERR_PTR(-ENOMEM);
 627         }
 628
 629         ret = amdgpu_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
 630         if (ret) {
 631                 kfree(amdgpu_fb);
 632                 drm_gem_object_unreference_unlocked(obj);
 633                 return ERR_PTR(ret);
 634         }
 635
 636         return &amdgpu_fb->base;
 637 }
 638
 639 static void amdgpu_output_poll_changed(struct drm_device *dev)
 640 {
 641         struct amdgpu_device *adev = dev->dev_private;
 642         amdgpu_fb_output_poll_changed(adev);
 643 }
 644
 645 const struct drm_mode_config_funcs amdgpu_mode_funcs = {
 646         .fb_create = amdgpu_user_framebuffer_create,
 647         .output_poll_changed = amdgpu_output_poll_changed
 648 };
 649
 650 static const struct drm_prop_enum_list amdgpu_underscan_enum_list[] =
 651 {       { UNDERSCAN_OFF, "off" },
 652         { UNDERSCAN_ON, "on" },
 653         { UNDERSCAN_AUTO, "auto" },
 654 };
 655
 656 static const struct drm_prop_enum_list amdgpu_audio_enum_list[] =
 657 {       { AMDGPU_AUDIO_DISABLE, "off" },
 658         { AMDGPU_AUDIO_ENABLE, "on" },
 659         { AMDGPU_AUDIO_AUTO, "auto" },
 660 };
 661
 662 /* XXX support different dither options? spatial, temporal, both, etc. */
 663 static const struct drm_prop_enum_list amdgpu_dither_enum_list[] =
 664 {       { AMDGPU_FMT_DITHER_DISABLE, "off" },
 665         { AMDGPU_FMT_DITHER_ENABLE, "on" },
 666 };
 667
 668 int amdgpu_modeset_create_props(struct amdgpu_device *adev)
 669 {
 670         int sz;
 671
 672         adev->mode_info.coherent_mode_property =
 673                 drm_property_create_range(adev->ddev, 0 , "coherent", 0, 1);
 674         if (!adev->mode_info.coherent_mode_property)
 675                 return -ENOMEM;
 676
 677         adev->mode_info.load_detect_property =
 678                 drm_property_create_range(adev->ddev, 0, "load detection", 0, 1);
 679         if (!adev->mode_info.load_detect_property)
 680                 return -ENOMEM;
 681
 682         drm_mode_create_scaling_mode_property(adev->ddev);
 683
 684         sz = ARRAY_SIZE(amdgpu_underscan_enum_list);
 685         adev->mode_info.underscan_property =
 686                 drm_property_create_enum(adev->ddev, 0,
 687                                     "underscan",
 688                                     amdgpu_underscan_enum_list, sz);
 689
 690         adev->mode_info.underscan_hborder_property =
 691                 drm_property_create_range(adev->ddev, 0,
 692                                         "underscan hborder", 0, 128);
 693         if (!adev->mode_info.underscan_hborder_property)
 694                 return -ENOMEM;
 695
 696         adev->mode_info.underscan_vborder_property =
 697                 drm_property_create_range(adev->ddev, 0,
 698                                         "underscan vborder", 0, 128);
 699         if (!adev->mode_info.underscan_vborder_property)
 700                 return -ENOMEM;
 701
 702         sz = ARRAY_SIZE(amdgpu_audio_enum_list);
 703         adev->mode_info.audio_property =
 704                 drm_property_create_enum(adev->ddev, 0,
 705                                          "audio",
 706                                          amdgpu_audio_enum_list, sz);
 707
 708         sz = ARRAY_SIZE(amdgpu_dither_enum_list);
 709         adev->mode_info.dither_property =
 710                 drm_property_create_enum(adev->ddev, 0,
 711                                          "dither",
 712                                          amdgpu_dither_enum_list, sz);
 713
 714         return 0;
 715 }
 716
 717 void amdgpu_update_display_priority(struct amdgpu_device *adev)
 718 {
 719         /* adjustment options for the display watermarks */
 720         if ((amdgpu_disp_priority == 0) || (amdgpu_disp_priority > 2))
 721                 adev->mode_info.disp_priority = 0;
 722         else
 723                 adev->mode_info.disp_priority = amdgpu_disp_priority;
 724
 725 }
 726
 727 static bool is_hdtv_mode(const struct drm_display_mode *mode)
 728 {
 729         /* try and guess if this is a tv or a monitor */
 730         if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
 731             (mode->vdisplay == 576) || /* 576p */
 732             (mode->vdisplay == 720) || /* 720p */
 733             (mode->vdisplay == 1080)) /* 1080p */
 734                 return true;
 735         else
 736                 return false;
 737 }
 738
 739 bool amdgpu_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
 740                                     const struct drm_display_mode *mode,
 741                                     struct drm_display_mode *adjusted_mode)
 742 {
 743         struct drm_device *dev = crtc->dev;
 744         struct drm_encoder *encoder;
 745         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 746         struct amdgpu_encoder *amdgpu_encoder;
 747         struct drm_connector *connector;
 748         struct amdgpu_connector *amdgpu_connector;
 749         u32 src_v = 1, dst_v = 1;
 750         u32 src_h = 1, dst_h = 1;
 751
 752         amdgpu_crtc->h_border = 0;
 753         amdgpu_crtc->v_border = 0;
 754
 755         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 756                 if (encoder->crtc != crtc)
 757                         continue;
 758                 amdgpu_encoder = to_amdgpu_encoder(encoder);
 759                 connector = amdgpu_get_connector_for_encoder(encoder);
 760                 amdgpu_connector = to_amdgpu_connector(connector);
 761
 762                 /* set scaling */
 763                 if (amdgpu_encoder->rmx_type == RMX_OFF)
 764                         amdgpu_crtc->rmx_type = RMX_OFF;
 765                 else if (mode->hdisplay < amdgpu_encoder->native_mode.hdisplay ||
 766                          mode->vdisplay < amdgpu_encoder->native_mode.vdisplay)
 767                         amdgpu_crtc->rmx_type = amdgpu_encoder->rmx_type;
 768                 else
 769                         amdgpu_crtc->rmx_type = RMX_OFF;
 770                 /* copy native mode */
 771                 memcpy(&amdgpu_crtc->native_mode,
 772                        &amdgpu_encoder->native_mode,
 773                        sizeof(struct drm_display_mode));
 774                 src_v = crtc->mode.vdisplay;
 775                 dst_v = amdgpu_crtc->native_mode.vdisplay;
 776                 src_h = crtc->mode.hdisplay;
 777                 dst_h = amdgpu_crtc->native_mode.hdisplay;
 778
 779                 /* fix up for overscan on hdmi */
 780                 if ((!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
 781                     ((amdgpu_encoder->underscan_type == UNDERSCAN_ON) ||
 782                      ((amdgpu_encoder->underscan_type == UNDERSCAN_AUTO) &&
 783                       drm_detect_hdmi_monitor(amdgpu_connector_edid(connector)) &&
 784                       is_hdtv_mode(mode)))) {
 785                         if (amdgpu_encoder->underscan_hborder != 0)
 786                                 amdgpu_crtc->h_border = amdgpu_encoder->underscan_hborder;
 787                         else
 788                                 amdgpu_crtc->h_border = (mode->hdisplay >> 5) + 16;
 789                         if (amdgpu_encoder->underscan_vborder != 0)
 790                                 amdgpu_crtc->v_border = amdgpu_encoder->underscan_vborder;
 791                         else
 792                                 amdgpu_crtc->v_border = (mode->vdisplay >> 5) + 16;
 793                         amdgpu_crtc->rmx_type = RMX_FULL;
 794                         src_v = crtc->mode.vdisplay;
 795                         dst_v = crtc->mode.vdisplay - (amdgpu_crtc->v_border * 2);
 796                         src_h = crtc->mode.hdisplay;
 797                         dst_h = crtc->mode.hdisplay - (amdgpu_crtc->h_border * 2);
 798                 }
 799         }
 800         if (amdgpu_crtc->rmx_type != RMX_OFF) {
 801                 fixed20_12 a, b;
 802                 a.full = dfixed_const(src_v);
 803                 b.full = dfixed_const(dst_v);
 804                 amdgpu_crtc->vsc.full = dfixed_div(a, b);
 805                 a.full = dfixed_const(src_h);
 806                 b.full = dfixed_const(dst_h);
 807                 amdgpu_crtc->hsc.full = dfixed_div(a, b);
 808         } else {
 809                 amdgpu_crtc->vsc.full = dfixed_const(1);
 810                 amdgpu_crtc->hsc.full = dfixed_const(1);
 811         }
 812         return true;
 813 }
 814
 815 /*
 816  * Retrieve current video scanout position of crtc on a given gpu, and
 817  * an optional accurate timestamp of when query happened.
 818  *
 819  * \param dev Device to query.
 820  * \param pipe Crtc to query.
 821  * \param flags Flags from caller (DRM_CALLED_FROM_VBLIRQ or 0).
 822  *              For driver internal use only also supports these flags:
 823  *
 824  *              USE_REAL_VBLANKSTART to use the real start of vblank instead
 825  *              of a fudged earlier start of vblank.
 826  *
 827  *              GET_DISTANCE_TO_VBLANKSTART to return distance to the
 828  *              fudged earlier start of vblank in *vpos and the distance
 829  *              to true start of vblank in *hpos.
 830  *
 831  * \param *vpos Location where vertical scanout position should be stored.
 832  * \param *hpos Location where horizontal scanout position should go.
 833  * \param *stime Target location for timestamp taken immediately before
 834  *               scanout position query. Can be NULL to skip timestamp.
 835  * \param *etime Target location for timestamp taken immediately after
 836  *               scanout position query. Can be NULL to skip timestamp.
 837  *
 838  * Returns vpos as a positive number while in active scanout area.
 839  * Returns vpos as a negative number inside vblank, counting the number
 840  * of scanlines to go until end of vblank, e.g., -1 means "one scanline
 841  * until start of active scanout / end of vblank."
 842  *
 843  * \return Flags, or'ed together as follows:
 844  *
 845  * DRM_SCANOUTPOS_VALID = Query successful.
 846  * DRM_SCANOUTPOS_INVBL = Inside vblank.
 847  * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
 848  * this flag means that returned position may be offset by a constant but
 849  * unknown small number of scanlines wrt. real scanout position.
 850  *
 851  */
 852 int amdgpu_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
 853                                unsigned int flags, int *vpos, int *hpos,
 854                                ktime_t *stime, ktime_t *etime,
 855                                const struct drm_display_mode *mode)
 856 {
 857         u32 vbl = 0, position = 0;
 858         int vbl_start, vbl_end, vtotal, ret = 0;
 859         bool in_vbl = true;
 860
 861         struct amdgpu_device *adev = dev->dev_private;
 862
 863         /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
 864
 865         /* Get optional system timestamp before query. */
 866         if (stime)
 867                 *stime = ktime_get();
 868
 869         if (amdgpu_display_page_flip_get_scanoutpos(adev, pipe, &vbl, &position) == 0)
 870                 ret |= DRM_SCANOUTPOS_VALID;
 871
 872         /* Get optional system timestamp after query. */
 873         if (etime)
 874                 *etime = ktime_get();
 875
 876         /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
 877
 878         /* Decode into vertical and horizontal scanout position. */
 879         *vpos = position & 0x1fff;
 880         *hpos = (position >> 16) & 0x1fff;
 881
 882         /* Valid vblank area boundaries from gpu retrieved? */
 883         if (vbl > 0) {
 884                 /* Yes: Decode. */
 885                 ret |= DRM_SCANOUTPOS_ACCURATE;
 886                 vbl_start = vbl & 0x1fff;
 887                 vbl_end = (vbl >> 16) & 0x1fff;
 888         }
 889         else {
 890                 /* No: Fake something reasonable which gives at least ok results. */
 891                 vbl_start = mode->crtc_vdisplay;
 892                 vbl_end = 0;
 893         }
 894
 895         /* Called from driver internal vblank counter query code? */
 896         if (flags & GET_DISTANCE_TO_VBLANKSTART) {
 897             /* Caller wants distance from real vbl_start in *hpos */
 898             *hpos = *vpos - vbl_start;
 899         }
 900
 901         /* Fudge vblank to start a few scanlines earlier to handle the
 902          * problem that vblank irqs fire a few scanlines before start
 903          * of vblank. Some driver internal callers need the true vblank
 904          * start to be used and signal this via the USE_REAL_VBLANKSTART flag.
 905          *
 906          * The cause of the "early" vblank irq is that the irq is triggered
 907          * by the line buffer logic when the line buffer read position enters
 908          * the vblank, whereas our crtc scanout position naturally lags the
 909          * line buffer read position.
 910          */
 911         if (!(flags & USE_REAL_VBLANKSTART))
 912                 vbl_start -= adev->mode_info.crtcs[pipe]->lb_vblank_lead_lines;
 913
 914         /* Test scanout position against vblank region. */
 915         if ((*vpos < vbl_start) && (*vpos >= vbl_end))
 916                 in_vbl = false;
 917
 918         /* In vblank? */
 919         if (in_vbl)
 920             ret |= DRM_SCANOUTPOS_IN_VBLANK;
 921
 922         /* Called from driver internal vblank counter query code? */
 923         if (flags & GET_DISTANCE_TO_VBLANKSTART) {
 924                 /* Caller wants distance from fudged earlier vbl_start */
 925                 *vpos -= vbl_start;
 926                 return ret;
 927         }
 928
 929         /* Check if inside vblank area and apply corrective offsets:
 930          * vpos will then be >=0 in video scanout area, but negative
 931          * within vblank area, counting down the number of lines until
 932          * start of scanout.
 933          */
 934
 935         /* Inside "upper part" of vblank area? Apply corrective offset if so: */
 936         if (in_vbl && (*vpos >= vbl_start)) {
 937                 vtotal = mode->crtc_vtotal;
 938                 *vpos = *vpos - vtotal;
 939         }
 940
 941         /* Correct for shifted end of vbl at vbl_end. */
 942         *vpos = *vpos - vbl_end;
 943
 944         return ret;
 945 }
 946
 947 int amdgpu_crtc_idx_to_irq_type(struct amdgpu_device *adev, int crtc)
 948 {
 949         if (crtc < 0 || crtc >= adev->mode_info.num_crtc)
 950                 return AMDGPU_CRTC_IRQ_NONE;
 951
 952         switch (crtc) {
 953         case 0:
 954                 return AMDGPU_CRTC_IRQ_VBLANK1;
 955         case 1:
 956                 return AMDGPU_CRTC_IRQ_VBLANK2;
 957         case 2:
 958                 return AMDGPU_CRTC_IRQ_VBLANK3;
 959         case 3:
 960                 return AMDGPU_CRTC_IRQ_VBLANK4;
 961         case 4:
 962                 return AMDGPU_CRTC_IRQ_VBLANK5;
 963         case 5:
 964                 return AMDGPU_CRTC_IRQ_VBLANK6;
 965         default:
 966                 return AMDGPU_CRTC_IRQ_NONE;
 967         }
 968 }