drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright 2022 Advanced Micro Devices, 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: AMD
  24  *
  25  */
  26 #include <drm/drm_vblank.h>
  27 #include <drm/drm_atomic_helper.h>
  28
  29 #include "dc.h"
  30 #include "amdgpu.h"
  31 #include "amdgpu_dm_psr.h"
  32 #include "amdgpu_dm_replay.h"
  33 #include "amdgpu_dm_crtc.h"
  34 #include "amdgpu_dm_plane.h"
  35 #include "amdgpu_dm_trace.h"
  36 #include "amdgpu_dm_debugfs.h"
  37
  38 void amdgpu_dm_crtc_handle_vblank(struct amdgpu_crtc *acrtc)
  39 {
  40         struct drm_crtc *crtc = &acrtc->base;
  41         struct drm_device *dev = crtc->dev;
  42         unsigned long flags;
  43
  44         drm_crtc_handle_vblank(crtc);
  45
  46         spin_lock_irqsave(&dev->event_lock, flags);
  47
  48         /* Send completion event for cursor-only commits */
  49         if (acrtc->event && acrtc->pflip_status != AMDGPU_FLIP_SUBMITTED) {
  50                 drm_crtc_send_vblank_event(crtc, acrtc->event);
  51                 drm_crtc_vblank_put(crtc);
  52                 acrtc->event = NULL;
  53         }
  54
  55         spin_unlock_irqrestore(&dev->event_lock, flags);
  56 }
  57
  58 bool amdgpu_dm_crtc_modeset_required(struct drm_crtc_state *crtc_state,
  59                              struct dc_stream_state *new_stream,
  60                              struct dc_stream_state *old_stream)
  61 {
  62         return crtc_state->active && drm_atomic_crtc_needs_modeset(crtc_state);
  63 }
  64
  65 bool amdgpu_dm_crtc_vrr_active_irq(struct amdgpu_crtc *acrtc)
  66
  67 {
  68         return acrtc->dm_irq_params.freesync_config.state ==
  69                        VRR_STATE_ACTIVE_VARIABLE ||
  70                acrtc->dm_irq_params.freesync_config.state ==
  71                        VRR_STATE_ACTIVE_FIXED;
  72 }
  73
  74 int amdgpu_dm_crtc_set_vupdate_irq(struct drm_crtc *crtc, bool enable)
  75 {
  76         enum dc_irq_source irq_source;
  77         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
  78         struct amdgpu_device *adev = drm_to_adev(crtc->dev);
  79         int rc;
  80
  81         if (acrtc->otg_inst == -1)
  82                 return 0;
  83
  84         irq_source = IRQ_TYPE_VUPDATE + acrtc->otg_inst;
  85
  86         rc = dc_interrupt_set(adev->dm.dc, irq_source, enable) ? 0 : -EBUSY;
  87
  88         DRM_DEBUG_VBL("crtc %d - vupdate irq %sabling: r=%d\n",
  89                       acrtc->crtc_id, enable ? "en" : "dis", rc);
  90         return rc;
  91 }
  92
  93 bool amdgpu_dm_crtc_vrr_active(struct dm_crtc_state *dm_state)
  94 {
  95         return dm_state->freesync_config.state == VRR_STATE_ACTIVE_VARIABLE ||
  96                dm_state->freesync_config.state == VRR_STATE_ACTIVE_FIXED;
  97 }
  98
  99 static void vblank_control_worker(struct work_struct *work)
 100 {
 101         struct vblank_control_work *vblank_work =
 102                 container_of(work, struct vblank_control_work, work);
 103         struct amdgpu_display_manager *dm = vblank_work->dm;
 104
 105         mutex_lock(&dm->dc_lock);
 106
 107         if (vblank_work->enable)
 108                 dm->active_vblank_irq_count++;
 109         else if (dm->active_vblank_irq_count)
 110                 dm->active_vblank_irq_count--;
 111
 112         dc_allow_idle_optimizations(dm->dc, dm->active_vblank_irq_count == 0);
 113
 114         DRM_DEBUG_KMS("Allow idle optimizations (MALL): %d\n", dm->active_vblank_irq_count == 0);
 115
 116         /*
 117          * Control PSR based on vblank requirements from OS
 118          *
 119          * If panel supports PSR SU, there's no need to disable PSR when OS is
 120          * submitting fast atomic commits (we infer this by whether the OS
 121          * requests vblank events). Fast atomic commits will simply trigger a
 122          * full-frame-update (FFU); a specific case of selective-update (SU)
 123          * where the SU region is the full hactive*vactive region. See
 124          * fill_dc_dirty_rects().
 125          */
 126         if (vblank_work->stream && vblank_work->stream->link) {
 127                 /*
 128                  * Prioritize replay, instead of psr
 129                  */
 130                 if (vblank_work->stream->link->replay_settings.replay_feature_enabled)
 131                         amdgpu_dm_replay_enable(vblank_work->stream, false);
 132                 else if (vblank_work->enable) {
 133                         if (vblank_work->stream->link->psr_settings.psr_version < DC_PSR_VERSION_SU_1 &&
 134                             vblank_work->stream->link->psr_settings.psr_allow_active)
 135                                 amdgpu_dm_psr_disable(vblank_work->stream);
 136                 } else if (vblank_work->stream->link->psr_settings.psr_feature_enabled &&
 137                            !vblank_work->stream->link->psr_settings.psr_allow_active &&
 138 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
 139                            !amdgpu_dm_crc_window_is_activated(&vblank_work->acrtc->base) &&
 140 #endif
 141                            vblank_work->stream->link->panel_config.psr.disallow_replay &&
 142                            vblank_work->acrtc->dm_irq_params.allow_psr_entry) {
 143                         amdgpu_dm_psr_enable(vblank_work->stream);
 144                 }
 145         }
 146
 147         mutex_unlock(&dm->dc_lock);
 148
 149         dc_stream_release(vblank_work->stream);
 150
 151         kfree(vblank_work);
 152 }
 153
 154 static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
 155 {
 156         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
 157         struct amdgpu_device *adev = drm_to_adev(crtc->dev);
 158         struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
 159         struct amdgpu_display_manager *dm = &adev->dm;
 160         struct vblank_control_work *work;
 161         int rc = 0;
 162
 163         if (acrtc->otg_inst == -1)
 164                 goto skip;
 165
 166         if (enable) {
 167                 /* vblank irq on -> Only need vupdate irq in vrr mode */
 168                 if (amdgpu_dm_crtc_vrr_active(acrtc_state))
 169                         rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, true);
 170         } else {
 171                 /* vblank irq off -> vupdate irq off */
 172                 rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, false);
 173         }
 174
 175         if (rc)
 176                 return rc;
 177
 178         rc = (enable)
 179                 ? amdgpu_irq_get(adev, &adev->crtc_irq, acrtc->crtc_id)
 180                 : amdgpu_irq_put(adev, &adev->crtc_irq, acrtc->crtc_id);
 181
 182         if (rc)
 183                 return rc;
 184
 185 skip:
 186         if (amdgpu_in_reset(adev))
 187                 return 0;
 188
 189         if (dm->vblank_control_workqueue) {
 190                 work = kzalloc(sizeof(*work), GFP_ATOMIC);
 191                 if (!work)
 192                         return -ENOMEM;
 193
 194                 INIT_WORK(&work->work, vblank_control_worker);
 195                 work->dm = dm;
 196                 work->acrtc = acrtc;
 197                 work->enable = enable;
 198
 199                 if (acrtc_state->stream) {
 200                         dc_stream_retain(acrtc_state->stream);
 201                         work->stream = acrtc_state->stream;
 202                 }
 203
 204                 queue_work(dm->vblank_control_workqueue, &work->work);
 205         }
 206
 207         return 0;
 208 }
 209
 210 int amdgpu_dm_crtc_enable_vblank(struct drm_crtc *crtc)
 211 {
 212         return dm_set_vblank(crtc, true);
 213 }
 214
 215 void amdgpu_dm_crtc_disable_vblank(struct drm_crtc *crtc)
 216 {
 217         dm_set_vblank(crtc, false);
 218 }
 219
 220 static void dm_crtc_destroy_state(struct drm_crtc *crtc,
 221                                   struct drm_crtc_state *state)
 222 {
 223         struct dm_crtc_state *cur = to_dm_crtc_state(state);
 224
 225         /* TODO Destroy dc_stream objects are stream object is flattened */
 226         if (cur->stream)
 227                 dc_stream_release(cur->stream);
 228
 229
 230         __drm_atomic_helper_crtc_destroy_state(state);
 231
 232
 233         kfree(state);
 234 }
 235
 236 static struct drm_crtc_state *dm_crtc_duplicate_state(struct drm_crtc *crtc)
 237 {
 238         struct dm_crtc_state *state, *cur;
 239
 240         cur = to_dm_crtc_state(crtc->state);
 241
 242         if (WARN_ON(!crtc->state))
 243                 return NULL;
 244
 245         state = kzalloc(sizeof(*state), GFP_KERNEL);
 246         if (!state)
 247                 return NULL;
 248
 249         __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
 250
 251         if (cur->stream) {
 252                 state->stream = cur->stream;
 253                 dc_stream_retain(state->stream);
 254         }
 255
 256         state->active_planes = cur->active_planes;
 257         state->vrr_infopacket = cur->vrr_infopacket;
 258         state->abm_level = cur->abm_level;
 259         state->vrr_supported = cur->vrr_supported;
 260         state->freesync_config = cur->freesync_config;
 261         state->cm_has_degamma = cur->cm_has_degamma;
 262         state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb;
 263         state->crc_skip_count = cur->crc_skip_count;
 264         state->mpo_requested = cur->mpo_requested;
 265         /* TODO Duplicate dc_stream after objects are stream object is flattened */
 266
 267         return &state->base;
 268 }
 269
 270 static void amdgpu_dm_crtc_destroy(struct drm_crtc *crtc)
 271 {
 272         drm_crtc_cleanup(crtc);
 273         kfree(crtc);
 274 }
 275
 276 static void dm_crtc_reset_state(struct drm_crtc *crtc)
 277 {
 278         struct dm_crtc_state *state;
 279
 280         if (crtc->state)
 281                 dm_crtc_destroy_state(crtc, crtc->state);
 282
 283         state = kzalloc(sizeof(*state), GFP_KERNEL);
 284         if (WARN_ON(!state))
 285                 return;
 286
 287         __drm_atomic_helper_crtc_reset(crtc, &state->base);
 288 }
 289
 290 #ifdef CONFIG_DEBUG_FS
 291 static int amdgpu_dm_crtc_late_register(struct drm_crtc *crtc)
 292 {
 293         crtc_debugfs_init(crtc);
 294
 295         return 0;
 296 }
 297 #endif
 298
 299 /* Implemented only the options currently available for the driver */
 300 static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
 301         .reset = dm_crtc_reset_state,
 302         .destroy = amdgpu_dm_crtc_destroy,
 303         .set_config = drm_atomic_helper_set_config,
 304         .page_flip = drm_atomic_helper_page_flip,
 305         .atomic_duplicate_state = dm_crtc_duplicate_state,
 306         .atomic_destroy_state = dm_crtc_destroy_state,
 307         .set_crc_source = amdgpu_dm_crtc_set_crc_source,
 308         .verify_crc_source = amdgpu_dm_crtc_verify_crc_source,
 309         .get_crc_sources = amdgpu_dm_crtc_get_crc_sources,
 310         .get_vblank_counter = amdgpu_get_vblank_counter_kms,
 311         .enable_vblank = amdgpu_dm_crtc_enable_vblank,
 312         .disable_vblank = amdgpu_dm_crtc_disable_vblank,
 313         .get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
 314 #if defined(CONFIG_DEBUG_FS)
 315         .late_register = amdgpu_dm_crtc_late_register,
 316 #endif
 317 };
 318
 319 static void dm_crtc_helper_disable(struct drm_crtc *crtc)
 320 {
 321 }
 322
 323 static int count_crtc_active_planes(struct drm_crtc_state *new_crtc_state)
 324 {
 325         struct drm_atomic_state *state = new_crtc_state->state;
 326         struct drm_plane *plane;
 327         int num_active = 0;
 328
 329         drm_for_each_plane_mask(plane, state->dev, new_crtc_state->plane_mask) {
 330                 struct drm_plane_state *new_plane_state;
 331
 332                 /* Cursor planes are "fake". */
 333                 if (plane->type == DRM_PLANE_TYPE_CURSOR)
 334                         continue;
 335
 336                 new_plane_state = drm_atomic_get_new_plane_state(state, plane);
 337
 338                 if (!new_plane_state) {
 339                         /*
 340                          * The plane is enable on the CRTC and hasn't changed
 341                          * state. This means that it previously passed
 342                          * validation and is therefore enabled.
 343                          */
 344                         num_active += 1;
 345                         continue;
 346                 }
 347
 348                 /* We need a framebuffer to be considered enabled. */
 349                 num_active += (new_plane_state->fb != NULL);
 350         }
 351
 352         return num_active;
 353 }
 354
 355 static void dm_update_crtc_active_planes(struct drm_crtc *crtc,
 356                                          struct drm_crtc_state *new_crtc_state)
 357 {
 358         struct dm_crtc_state *dm_new_crtc_state =
 359                 to_dm_crtc_state(new_crtc_state);
 360
 361         dm_new_crtc_state->active_planes = 0;
 362
 363         if (!dm_new_crtc_state->stream)
 364                 return;
 365
 366         dm_new_crtc_state->active_planes =
 367                 count_crtc_active_planes(new_crtc_state);
 368 }
 369
 370 static bool dm_crtc_helper_mode_fixup(struct drm_crtc *crtc,
 371                                       const struct drm_display_mode *mode,
 372                                       struct drm_display_mode *adjusted_mode)
 373 {
 374         return true;
 375 }
 376
 377 static int dm_crtc_helper_atomic_check(struct drm_crtc *crtc,
 378                                       struct drm_atomic_state *state)
 379 {
 380         struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 381                                                                                 crtc);
 382         struct amdgpu_device *adev = drm_to_adev(crtc->dev);
 383         struct dc *dc = adev->dm.dc;
 384         struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state);
 385         int ret = -EINVAL;
 386
 387         trace_amdgpu_dm_crtc_atomic_check(crtc_state);
 388
 389         dm_update_crtc_active_planes(crtc, crtc_state);
 390
 391         if (WARN_ON(unlikely(!dm_crtc_state->stream &&
 392                         amdgpu_dm_crtc_modeset_required(crtc_state, NULL, dm_crtc_state->stream)))) {
 393                 return ret;
 394         }
 395
 396         /*
 397          * We require the primary plane to be enabled whenever the CRTC is, otherwise
 398          * drm_mode_cursor_universal may end up trying to enable the cursor plane while all other
 399          * planes are disabled, which is not supported by the hardware. And there is legacy
 400          * userspace which stops using the HW cursor altogether in response to the resulting EINVAL.
 401          */
 402         if (crtc_state->enable &&
 403                 !(crtc_state->plane_mask & drm_plane_mask(crtc->primary))) {
 404                 DRM_DEBUG_ATOMIC("Can't enable a CRTC without enabling the primary plane\n");
 405                 return -EINVAL;
 406         }
 407
 408         /*
 409          * Only allow async flips for fast updates that don't change the FB
 410          * pitch, the DCC state, rotation, etc.
 411          */
 412         if (crtc_state->async_flip &&
 413             dm_crtc_state->update_type != UPDATE_TYPE_FAST) {
 414                 drm_dbg_atomic(crtc->dev,
 415                                "[CRTC:%d:%s] async flips are only supported for fast updates\n",
 416                                crtc->base.id, crtc->name);
 417                 return -EINVAL;
 418         }
 419
 420         /* In some use cases, like reset, no stream is attached */
 421         if (!dm_crtc_state->stream)
 422                 return 0;
 423
 424         if (dc_validate_stream(dc, dm_crtc_state->stream) == DC_OK)
 425                 return 0;
 426
 427         DRM_DEBUG_ATOMIC("Failed DC stream validation\n");
 428         return ret;
 429 }
 430
 431 static const struct drm_crtc_helper_funcs amdgpu_dm_crtc_helper_funcs = {
 432         .disable = dm_crtc_helper_disable,
 433         .atomic_check = dm_crtc_helper_atomic_check,
 434         .mode_fixup = dm_crtc_helper_mode_fixup,
 435         .get_scanout_position = amdgpu_crtc_get_scanout_position,
 436 };
 437
 438 int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
 439                                struct drm_plane *plane,
 440                                uint32_t crtc_index)
 441 {
 442         struct amdgpu_crtc *acrtc = NULL;
 443         struct drm_plane *cursor_plane;
 444         bool is_dcn;
 445         int res = -ENOMEM;
 446
 447         cursor_plane = kzalloc(sizeof(*cursor_plane), GFP_KERNEL);
 448         if (!cursor_plane)
 449                 goto fail;
 450
 451         cursor_plane->type = DRM_PLANE_TYPE_CURSOR;
 452         res = amdgpu_dm_plane_init(dm, cursor_plane, 0, NULL);
 453
 454         acrtc = kzalloc(sizeof(struct amdgpu_crtc), GFP_KERNEL);
 455         if (!acrtc)
 456                 goto fail;
 457
 458         res = drm_crtc_init_with_planes(
 459                         dm->ddev,
 460                         &acrtc->base,
 461                         plane,
 462                         cursor_plane,
 463                         &amdgpu_dm_crtc_funcs, NULL);
 464
 465         if (res)
 466                 goto fail;
 467
 468         drm_crtc_helper_add(&acrtc->base, &amdgpu_dm_crtc_helper_funcs);
 469
 470         /* Create (reset) the plane state */
 471         if (acrtc->base.funcs->reset)
 472                 acrtc->base.funcs->reset(&acrtc->base);
 473
 474         acrtc->max_cursor_width = dm->adev->dm.dc->caps.max_cursor_size;
 475         acrtc->max_cursor_height = dm->adev->dm.dc->caps.max_cursor_size;
 476
 477         acrtc->crtc_id = crtc_index;
 478         acrtc->base.enabled = false;
 479         acrtc->otg_inst = -1;
 480
 481         dm->adev->mode_info.crtcs[crtc_index] = acrtc;
 482
 483         /* Don't enable DRM CRTC degamma property for DCE since it doesn't
 484          * support programmable degamma anywhere.
 485          */
 486         is_dcn = dm->adev->dm.dc->caps.color.dpp.dcn_arch;
 487         drm_crtc_enable_color_mgmt(&acrtc->base, is_dcn ? MAX_COLOR_LUT_ENTRIES : 0,
 488                                    true, MAX_COLOR_LUT_ENTRIES);
 489
 490         drm_mode_crtc_set_gamma_size(&acrtc->base, MAX_COLOR_LEGACY_LUT_ENTRIES);
 491
 492         return 0;
 493
 494 fail:
 495         kfree(acrtc);
 496         kfree(cursor_plane);
 497         return res;
 498 }
 499