drmdisplaycompositor.cpp revision 0c7da1e236c3a31a5bc171aac4d5f2a1033f10e1 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18#define LOG_TAG "hwc-drm-display-compositor"
19
20#include "drmdisplaycompositor.h"
21
22#include <pthread.h>
23#include <sched.h>
24#include <stdlib.h>
25#include <time.h>
26#include <sstream>
27#include <vector>
28
29#include <cutils/log.h>
30#include <drm/drm_mode.h>
31#include <sync/sync.h>
32#include <utils/Trace.h>
33
34#include "autolock.h"
35#include "drmcrtc.h"
36#include "drmplane.h"
37#include "drmresources.h"
38#include "glworker.h"
39
40#define DRM_DISPLAY_COMPOSITOR_MAX_QUEUE_DEPTH 2
41
42namespace android {
43
44void SquashState::Init(DrmHwcLayer *layers, size_t num_layers) {
45  generation_number_++;
46  valid_history_ = 0;
47  regions_.clear();
48  last_handles_.clear();
49
50  std::vector<DrmHwcRect<int>> in_rects;
51  for (size_t i = 0; i < num_layers; i++) {
52    DrmHwcLayer *layer = &layers[i];
53    in_rects.emplace_back(layer->display_frame);
54    last_handles_.push_back(layer->sf_handle);
55  }
56
57  std::vector<separate_rects::RectSet<uint64_t, int>> out_regions;
58  separate_rects::separate_rects_64(in_rects, &out_regions);
59
60  for (const separate_rects::RectSet<uint64_t, int> &out_region : out_regions) {
61    regions_.emplace_back();
62    Region &region = regions_.back();
63    region.rect = out_region.rect;
64    region.layer_refs = out_region.id_set.getBits();
65  }
66}
67
68void SquashState::GenerateHistory(DrmHwcLayer *layers, size_t num_layers,
69                                  std::vector<bool> &changed_regions) const {
70  changed_regions.resize(regions_.size());
71  if (num_layers != last_handles_.size()) {
72    ALOGE("SquashState::GenerateHistory expected %zu layers but got %zu layers",
73          last_handles_.size(), num_layers);
74    return;
75  }
76  std::bitset<kMaxLayers> changed_layers;
77  for (size_t i = 0; i < last_handles_.size(); i++) {
78    DrmHwcLayer *layer = &layers[i];
79    // Protected layers can't be squashed so we treat them as constantly
80    // changing.
81    if (layer->protected_usage() || last_handles_[i] != layer->sf_handle)
82      changed_layers.set(i);
83  }
84
85  for (size_t i = 0; i < regions_.size(); i++) {
86    changed_regions[i] = (regions_[i].layer_refs & changed_layers).any();
87  }
88}
89
90void SquashState::StableRegionsWithMarginalHistory(
91    const std::vector<bool> &changed_regions,
92    std::vector<bool> &stable_regions) const {
93  stable_regions.resize(regions_.size());
94  for (size_t i = 0; i < regions_.size(); i++) {
95    stable_regions[i] = !changed_regions[i] && is_stable(i);
96  }
97}
98
99void SquashState::RecordHistory(DrmHwcLayer *layers, size_t num_layers,
100                                const std::vector<bool> &changed_regions) {
101  if (num_layers != last_handles_.size()) {
102    ALOGE("SquashState::RecordHistory expected %zu layers but got %zu layers",
103          last_handles_.size(), num_layers);
104    return;
105  }
106  if (changed_regions.size() != regions_.size()) {
107    ALOGE("SquashState::RecordHistory expected %zu regions but got %zu regions",
108          regions_.size(), changed_regions.size());
109    return;
110  }
111
112  for (size_t i = 0; i < last_handles_.size(); i++) {
113    DrmHwcLayer *layer = &layers[i];
114    last_handles_[i] = layer->sf_handle;
115  }
116
117  for (size_t i = 0; i < regions_.size(); i++) {
118    regions_[i].change_history <<= 1;
119    regions_[i].change_history.set(/* LSB */ 0, changed_regions[i]);
120  }
121
122  valid_history_++;
123}
124
125bool SquashState::RecordAndCompareSquashed(
126    const std::vector<bool> &squashed_regions) {
127  if (squashed_regions.size() != regions_.size()) {
128    ALOGE(
129        "SquashState::RecordAndCompareSquashed expected %zu regions but got "
130        "%zu regions",
131        regions_.size(), squashed_regions.size());
132    return false;
133  }
134  bool changed = false;
135  for (size_t i = 0; i < regions_.size(); i++) {
136    if (regions_[i].squashed != squashed_regions[i]) {
137      regions_[i].squashed = squashed_regions[i];
138      changed = true;
139    }
140  }
141  return changed;
142}
143
144void SquashState::Dump(std::ostringstream *out) const {
145  *out << "----SquashState generation=" << generation_number_
146       << " history=" << valid_history_ << "\n"
147       << "    Regions: count=" << regions_.size() << "\n";
148  for (size_t i = 0; i < regions_.size(); i++) {
149    const Region &region = regions_[i];
150    *out << "      [" << i << "]"
151         << " history=" << region.change_history << " rect";
152    region.rect.Dump(out);
153    *out << " layers=(";
154    bool first = true;
155    for (size_t layer_index = 0; layer_index < kMaxLayers; layer_index++) {
156      if ((region.layer_refs &
157           std::bitset<kMaxLayers>((size_t)1 << layer_index))
158              .any()) {
159        if (!first)
160          *out << " ";
161        first = false;
162        *out << layer_index;
163      }
164    }
165    *out << ")";
166    if (region.squashed)
167      *out << " squashed";
168    *out << "\n";
169  }
170}
171
172static bool UsesSquash(const std::vector<DrmCompositionPlane> &comp_planes) {
173  return std::any_of(comp_planes.begin(), comp_planes.end(),
174                     [](const DrmCompositionPlane &plane) {
175                       return plane.source_layer ==
176                              DrmCompositionPlane::kSourceSquash;
177                     });
178}
179
180DrmDisplayCompositor::FrameWorker::FrameWorker(DrmDisplayCompositor *compositor)
181    : Worker("frame-worker", HAL_PRIORITY_URGENT_DISPLAY),
182      compositor_(compositor) {
183}
184
185DrmDisplayCompositor::FrameWorker::~FrameWorker() {
186}
187
188int DrmDisplayCompositor::FrameWorker::Init() {
189  return InitWorker();
190}
191
192void DrmDisplayCompositor::FrameWorker::QueueFrame(
193    std::unique_ptr<DrmDisplayComposition> composition, int status) {
194  Lock();
195  FrameState frame;
196  frame.composition = std::move(composition);
197  frame.status = status;
198  frame_queue_.push(std::move(frame));
199  SignalLocked();
200  Unlock();
201}
202
203void DrmDisplayCompositor::FrameWorker::Routine() {
204  int ret = Lock();
205  if (ret) {
206    ALOGE("Failed to lock worker, %d", ret);
207    return;
208  }
209
210  int wait_ret = 0;
211  if (frame_queue_.empty()) {
212    wait_ret = WaitForSignalOrExitLocked();
213  }
214
215  FrameState frame;
216  if (!frame_queue_.empty()) {
217    frame = std::move(frame_queue_.front());
218    frame_queue_.pop();
219  }
220
221  ret = Unlock();
222  if (ret) {
223    ALOGE("Failed to unlock worker, %d", ret);
224    return;
225  }
226
227  if (wait_ret == -EINTR) {
228    return;
229  } else if (wait_ret) {
230    ALOGE("Failed to wait for signal, %d", wait_ret);
231    return;
232  }
233
234  compositor_->ApplyFrame(std::move(frame.composition), frame.status);
235}
236
237DrmDisplayCompositor::DrmDisplayCompositor()
238    : drm_(NULL),
239      display_(-1),
240      worker_(this),
241      frame_worker_(this),
242      initialized_(false),
243      active_(false),
244      framebuffer_index_(0),
245      squash_framebuffer_index_(0),
246      dump_frames_composited_(0),
247      dump_last_timestamp_ns_(0) {
248  struct timespec ts;
249  if (clock_gettime(CLOCK_MONOTONIC, &ts))
250    return;
251  dump_last_timestamp_ns_ = ts.tv_sec * 1000 * 1000 * 1000 + ts.tv_nsec;
252}
253
254DrmDisplayCompositor::~DrmDisplayCompositor() {
255  if (!initialized_)
256    return;
257
258  worker_.Exit();
259  frame_worker_.Exit();
260
261  int ret = pthread_mutex_lock(&lock_);
262  if (ret)
263    ALOGE("Failed to acquire compositor lock %d", ret);
264
265  if (mode_.blob_id)
266    drm_->DestroyPropertyBlob(mode_.blob_id);
267  if (mode_.old_blob_id)
268    drm_->DestroyPropertyBlob(mode_.old_blob_id);
269
270  while (!composite_queue_.empty()) {
271    composite_queue_.front().reset();
272    composite_queue_.pop();
273  }
274  active_composition_.reset();
275
276  ret = pthread_mutex_unlock(&lock_);
277  if (ret)
278    ALOGE("Failed to acquire compositor lock %d", ret);
279
280  pthread_mutex_destroy(&lock_);
281}
282
283int DrmDisplayCompositor::Init(DrmResources *drm, int display) {
284  drm_ = drm;
285  display_ = display;
286
287  int ret = pthread_mutex_init(&lock_, NULL);
288  if (ret) {
289    ALOGE("Failed to initialize drm compositor lock %d\n", ret);
290    return ret;
291  }
292  ret = worker_.Init();
293  if (ret) {
294    pthread_mutex_destroy(&lock_);
295    ALOGE("Failed to initialize compositor worker %d\n", ret);
296    return ret;
297  }
298  ret = frame_worker_.Init();
299  if (ret) {
300    pthread_mutex_destroy(&lock_);
301    ALOGE("Failed to initialize frame worker %d\n", ret);
302    return ret;
303  }
304
305  initialized_ = true;
306  return 0;
307}
308
309std::unique_ptr<DrmDisplayComposition> DrmDisplayCompositor::CreateComposition()
310    const {
311  return std::unique_ptr<DrmDisplayComposition>(new DrmDisplayComposition());
312}
313
314int DrmDisplayCompositor::QueueComposition(
315    std::unique_ptr<DrmDisplayComposition> composition) {
316  switch (composition->type()) {
317    case DRM_COMPOSITION_TYPE_FRAME:
318      if (!active_)
319        return -ENODEV;
320      break;
321    case DRM_COMPOSITION_TYPE_DPMS:
322      /*
323       * Update the state as soon as we get it so we can start/stop queuing
324       * frames asap.
325       */
326      active_ = (composition->dpms_mode() == DRM_MODE_DPMS_ON);
327      break;
328    case DRM_COMPOSITION_TYPE_MODESET:
329      break;
330    case DRM_COMPOSITION_TYPE_EMPTY:
331      return 0;
332    default:
333      ALOGE("Unknown composition type %d/%d", composition->type(), display_);
334      return -ENOENT;
335  }
336
337  int ret = pthread_mutex_lock(&lock_);
338  if (ret) {
339    ALOGE("Failed to acquire compositor lock %d", ret);
340    return ret;
341  }
342
343  // Block the queue if it gets too large. Otherwise, SurfaceFlinger will start
344  // to eat our buffer handles when we get about 1 second behind.
345  while (composite_queue_.size() >= DRM_DISPLAY_COMPOSITOR_MAX_QUEUE_DEPTH) {
346    pthread_mutex_unlock(&lock_);
347    sched_yield();
348    pthread_mutex_lock(&lock_);
349  }
350
351  composite_queue_.push(std::move(composition));
352
353  ret = pthread_mutex_unlock(&lock_);
354  if (ret) {
355    ALOGE("Failed to release compositor lock %d", ret);
356    return ret;
357  }
358
359  worker_.Signal();
360  return 0;
361}
362
363std::tuple<uint32_t, uint32_t, int>
364DrmDisplayCompositor::GetActiveModeResolution() {
365  DrmConnector *connector = drm_->GetConnectorForDisplay(display_);
366  if (connector == NULL) {
367    ALOGE("Failed to determine display mode: no connector for display %d",
368          display_);
369    return std::make_tuple(0, 0, -ENODEV);
370  }
371
372  const DrmMode &mode = connector->active_mode();
373  return std::make_tuple(mode.h_display(), mode.v_display(), 0);
374}
375
376int DrmDisplayCompositor::PrepareFramebuffer(
377    DrmFramebuffer &fb, DrmDisplayComposition *display_comp) {
378  int ret = fb.WaitReleased(-1);
379  if (ret) {
380    ALOGE("Failed to wait for framebuffer release %d", ret);
381    return ret;
382  }
383  uint32_t width, height;
384  std::tie(width, height, ret) = GetActiveModeResolution();
385  if (ret) {
386    ALOGE(
387        "Failed to allocate framebuffer because the display resolution could "
388        "not be determined %d",
389        ret);
390    return ret;
391  }
392
393  fb.set_release_fence_fd(-1);
394  if (!fb.Allocate(width, height)) {
395    ALOGE("Failed to allocate framebuffer with size %dx%d", width, height);
396    return -ENOMEM;
397  }
398
399  display_comp->layers().emplace_back();
400  DrmHwcLayer &pre_comp_layer = display_comp->layers().back();
401  pre_comp_layer.sf_handle = fb.buffer()->handle;
402  pre_comp_layer.blending = DrmHwcBlending::kPreMult;
403  pre_comp_layer.source_crop = DrmHwcRect<float>(0, 0, width, height);
404  pre_comp_layer.display_frame = DrmHwcRect<int>(0, 0, width, height);
405  ret = pre_comp_layer.buffer.ImportBuffer(fb.buffer()->handle,
406                                           display_comp->importer());
407  if (ret) {
408    ALOGE("Failed to import framebuffer for display %d", ret);
409    return ret;
410  }
411
412  return ret;
413}
414
415int DrmDisplayCompositor::ApplySquash(DrmDisplayComposition *display_comp) {
416  int ret = 0;
417
418  DrmFramebuffer &fb = squash_framebuffers_[squash_framebuffer_index_];
419  ret = PrepareFramebuffer(fb, display_comp);
420  if (ret) {
421    ALOGE("Failed to prepare framebuffer for squash %d", ret);
422    return ret;
423  }
424
425  std::vector<DrmCompositionRegion> &regions = display_comp->squash_regions();
426  ret = pre_compositor_->Composite(display_comp->layers().data(),
427                                   regions.data(), regions.size(), fb.buffer());
428  pre_compositor_->Finish();
429
430  if (ret) {
431    ALOGE("Failed to squash layers");
432    return ret;
433  }
434
435  ret = display_comp->CreateNextTimelineFence();
436  if (ret <= 0) {
437    ALOGE("Failed to create squash framebuffer release fence %d", ret);
438    return ret;
439  }
440
441  fb.set_release_fence_fd(ret);
442  display_comp->SignalSquashDone();
443
444  return 0;
445}
446
447int DrmDisplayCompositor::ApplyPreComposite(
448    DrmDisplayComposition *display_comp) {
449  int ret = 0;
450
451  DrmFramebuffer &fb = framebuffers_[framebuffer_index_];
452  ret = PrepareFramebuffer(fb, display_comp);
453  if (ret) {
454    ALOGE("Failed to prepare framebuffer for pre-composite %d", ret);
455    return ret;
456  }
457
458  std::vector<DrmCompositionRegion> &regions = display_comp->pre_comp_regions();
459  ret = pre_compositor_->Composite(display_comp->layers().data(),
460                                   regions.data(), regions.size(), fb.buffer());
461  pre_compositor_->Finish();
462
463  if (ret) {
464    ALOGE("Failed to pre-composite layers");
465    return ret;
466  }
467
468  ret = display_comp->CreateNextTimelineFence();
469  if (ret <= 0) {
470    ALOGE("Failed to create pre-composite framebuffer release fence %d", ret);
471    return ret;
472  }
473
474  fb.set_release_fence_fd(ret);
475  display_comp->SignalPreCompDone();
476
477  return 0;
478}
479
480int DrmDisplayCompositor::DisablePlanes(DrmDisplayComposition *display_comp) {
481  drmModePropertySetPtr pset = drmModePropertySetAlloc();
482  if (!pset) {
483    ALOGE("Failed to allocate property set");
484    return -ENOMEM;
485  }
486
487  int ret;
488  std::vector<DrmCompositionPlane> &comp_planes =
489      display_comp->composition_planes();
490  for (DrmCompositionPlane &comp_plane : comp_planes) {
491    DrmPlane *plane = comp_plane.plane;
492    ret =
493        drmModePropertySetAdd(pset, plane->id(), plane->crtc_property().id(),
494                              0) ||
495        drmModePropertySetAdd(pset, plane->id(), plane->fb_property().id(), 0);
496    if (ret) {
497      ALOGE("Failed to add plane %d disable to pset", plane->id());
498      drmModePropertySetFree(pset);
499      return ret;
500    }
501  }
502
503  ret = drmModePropertySetCommit(drm_->fd(), 0, drm_, pset);
504  if (ret) {
505    ALOGE("Failed to commit pset ret=%d\n", ret);
506    drmModePropertySetFree(pset);
507    return ret;
508  }
509
510  drmModePropertySetFree(pset);
511  return 0;
512}
513
514int DrmDisplayCompositor::PrepareFrame(DrmDisplayComposition *display_comp) {
515  int ret = 0;
516
517  std::vector<DrmHwcLayer> &layers = display_comp->layers();
518  std::vector<DrmCompositionPlane> &comp_planes =
519      display_comp->composition_planes();
520  std::vector<DrmCompositionRegion> &squash_regions =
521      display_comp->squash_regions();
522  std::vector<DrmCompositionRegion> &pre_comp_regions =
523      display_comp->pre_comp_regions();
524
525  int squash_layer_index = -1;
526  if (squash_regions.size() > 0) {
527    squash_framebuffer_index_ = (squash_framebuffer_index_ + 1) % 2;
528    ret = ApplySquash(display_comp);
529    if (ret)
530      return ret;
531
532    squash_layer_index = layers.size() - 1;
533  } else {
534    if (UsesSquash(comp_planes)) {
535      DrmFramebuffer &fb = squash_framebuffers_[squash_framebuffer_index_];
536      layers.emplace_back();
537      squash_layer_index = layers.size() - 1;
538      DrmHwcLayer &squash_layer = layers.back();
539      ret = squash_layer.buffer.ImportBuffer(fb.buffer()->handle,
540                                             display_comp->importer());
541      if (ret) {
542        ALOGE("Failed to import old squashed framebuffer %d", ret);
543        return ret;
544      }
545      squash_layer.sf_handle = fb.buffer()->handle;
546      squash_layer.blending = DrmHwcBlending::kPreMult;
547      squash_layer.source_crop = DrmHwcRect<float>(
548          0, 0, squash_layer.buffer->width, squash_layer.buffer->height);
549      squash_layer.display_frame = DrmHwcRect<int>(
550          0, 0, squash_layer.buffer->width, squash_layer.buffer->height);
551      ret = display_comp->CreateNextTimelineFence();
552
553      if (ret <= 0) {
554        ALOGE("Failed to create squash framebuffer release fence %d", ret);
555        return ret;
556      }
557
558      fb.set_release_fence_fd(ret);
559      ret = 0;
560    }
561  }
562
563  bool do_pre_comp = pre_comp_regions.size() > 0;
564  int pre_comp_layer_index = -1;
565  if (do_pre_comp) {
566    ret = ApplyPreComposite(display_comp);
567    if (ret)
568      return ret;
569
570    pre_comp_layer_index = layers.size() - 1;
571    framebuffer_index_ = (framebuffer_index_ + 1) % DRM_DISPLAY_BUFFERS;
572  }
573
574  for (DrmCompositionPlane &comp_plane : comp_planes) {
575    switch (comp_plane.source_layer) {
576      case DrmCompositionPlane::kSourceSquash:
577        comp_plane.source_layer = squash_layer_index;
578        break;
579      case DrmCompositionPlane::kSourcePreComp:
580        if (!do_pre_comp) {
581          ALOGE(
582              "Can not use pre composite framebuffer with no pre composite "
583              "regions");
584          return -EINVAL;
585        }
586        comp_plane.source_layer = pre_comp_layer_index;
587        break;
588      default:
589        break;
590    }
591  }
592
593  return ret;
594}
595
596int DrmDisplayCompositor::CommitFrame(DrmDisplayComposition *display_comp,
597                                      bool test_only) {
598  ATRACE_CALL();
599
600  int ret = 0;
601
602  std::vector<DrmHwcLayer> &layers = display_comp->layers();
603  std::vector<DrmCompositionPlane> &comp_planes =
604      display_comp->composition_planes();
605  std::vector<DrmCompositionRegion> &pre_comp_regions =
606      display_comp->pre_comp_regions();
607
608  DrmFramebuffer *pre_comp_fb;
609
610  DrmConnector *connector = drm_->GetConnectorForDisplay(display_);
611  if (!connector) {
612    ALOGE("Could not locate connector for display %d", display_);
613    return -ENODEV;
614  }
615  DrmCrtc *crtc = drm_->GetCrtcForDisplay(display_);
616  if (!crtc) {
617    ALOGE("Could not locate crtc for display %d", display_);
618    return -ENODEV;
619  }
620
621  drmModePropertySetPtr pset = drmModePropertySetAlloc();
622  if (!pset) {
623    ALOGE("Failed to allocate property set");
624    return -ENOMEM;
625  }
626
627  if (mode_.needs_modeset) {
628    ret = drmModePropertySetAdd(pset, crtc->id(), crtc->mode_property().id(),
629                                mode_.blob_id) ||
630          drmModePropertySetAdd(pset, connector->id(),
631                                connector->crtc_id_property().id(), crtc->id());
632    if (ret) {
633      ALOGE("Failed to add blob %d to pset", mode_.blob_id);
634      drmModePropertySetFree(pset);
635      return ret;
636    }
637  }
638
639  for (DrmCompositionPlane &comp_plane : comp_planes) {
640    DrmPlane *plane = comp_plane.plane;
641    DrmCrtc *crtc = comp_plane.crtc;
642
643    int fb_id = -1;
644    DrmHwcRect<int> display_frame;
645    DrmHwcRect<float> source_crop;
646    uint64_t rotation = 0;
647    uint64_t alpha = 0xFF;
648    switch (comp_plane.source_layer) {
649      case DrmCompositionPlane::kSourceNone:
650        break;
651      case DrmCompositionPlane::kSourceSquash:
652        ALOGE("Actual source layer index expected for squash layer");
653        break;
654      case DrmCompositionPlane::kSourcePreComp:
655        ALOGE("Actual source layer index expected for pre-comp layer");
656        break;
657      default: {
658        if (comp_plane.source_layer >= layers.size()) {
659          ALOGE("Source layer index %zu out of bounds %zu",
660                comp_plane.source_layer, layers.size());
661          break;
662        }
663        DrmHwcLayer &layer = layers[comp_plane.source_layer];
664        if (!test_only && layer.acquire_fence.get() >= 0) {
665          int acquire_fence = layer.acquire_fence.get();
666          for (int i = 0; i < kAcquireWaitTries; ++i) {
667            ret = sync_wait(acquire_fence, kAcquireWaitTimeoutMs);
668            if (ret)
669              ALOGW("Acquire fence %d wait %d failed (%d). Total time %d",
670                    acquire_fence, i, ret, (i + 1) * kAcquireWaitTimeoutMs);
671          }
672          if (ret) {
673            ALOGE("Failed to wait for acquire %d/%d", acquire_fence, ret);
674            break;
675          }
676          layer.acquire_fence.Close();
677        }
678        if (!layer.buffer) {
679          ALOGE("Expected a valid framebuffer for pset");
680          break;
681        }
682        fb_id = layer.buffer->fb_id;
683        display_frame = layer.display_frame;
684        source_crop = layer.source_crop;
685        if (layer.blending == DrmHwcBlending::kPreMult)
686          alpha = layer.alpha;
687
688        rotation = 0;
689        if (layer.transform & DrmHwcTransform::kFlipH)
690          rotation |= 1 << DRM_REFLECT_X;
691        if (layer.transform & DrmHwcTransform::kFlipV)
692          rotation |= 1 << DRM_REFLECT_Y;
693        if (layer.transform & DrmHwcTransform::kRotate90)
694          rotation |= 1 << DRM_ROTATE_90;
695        else if (layer.transform & DrmHwcTransform::kRotate180)
696          rotation |= 1 << DRM_ROTATE_180;
697        else if (layer.transform & DrmHwcTransform::kRotate270)
698          rotation |= 1 << DRM_ROTATE_270;
699      }
700    }
701
702    // Disable the plane if there's no framebuffer
703    if (fb_id < 0) {
704      ret = drmModePropertySetAdd(pset, plane->id(),
705                                  plane->crtc_property().id(), 0) ||
706            drmModePropertySetAdd(pset, plane->id(), plane->fb_property().id(),
707                                  0);
708      if (ret) {
709        ALOGE("Failed to add plane %d disable to pset", plane->id());
710        break;
711      }
712      continue;
713    }
714
715    // TODO: Once we have atomic test, this should fall back to GL
716    if (rotation && plane->rotation_property().id() == 0) {
717      ALOGE("Rotation is not supported on plane %d", plane->id());
718      ret = -EINVAL;
719      break;
720    }
721
722    // TODO: Once we have atomic test, this should fall back to GL
723    if (alpha != 0xFF && plane->alpha_property().id() == 0) {
724      ALOGE("Alpha is not supported on plane %d", plane->id());
725      ret = -EINVAL;
726      break;
727    }
728
729    ret =
730        drmModePropertySetAdd(pset, plane->id(), plane->crtc_property().id(),
731                              crtc->id()) ||
732        drmModePropertySetAdd(pset, plane->id(), plane->fb_property().id(),
733                              fb_id) ||
734        drmModePropertySetAdd(pset, plane->id(), plane->crtc_x_property().id(),
735                              display_frame.left) ||
736        drmModePropertySetAdd(pset, plane->id(), plane->crtc_y_property().id(),
737                              display_frame.top) ||
738        drmModePropertySetAdd(pset, plane->id(), plane->crtc_w_property().id(),
739                              display_frame.right - display_frame.left) ||
740        drmModePropertySetAdd(pset, plane->id(), plane->crtc_h_property().id(),
741                              display_frame.bottom - display_frame.top) ||
742        drmModePropertySetAdd(pset, plane->id(), plane->src_x_property().id(),
743                              (int)(source_crop.left) << 16) ||
744        drmModePropertySetAdd(pset, plane->id(), plane->src_y_property().id(),
745                              (int)(source_crop.top) << 16) ||
746        drmModePropertySetAdd(pset, plane->id(), plane->src_w_property().id(),
747                              (int)(source_crop.right - source_crop.left)
748                                  << 16) ||
749        drmModePropertySetAdd(pset, plane->id(), plane->src_h_property().id(),
750                              (int)(source_crop.bottom - source_crop.top)
751                                  << 16);
752    if (ret) {
753      ALOGE("Failed to add plane %d to set", plane->id());
754      break;
755    }
756
757    if (plane->rotation_property().id()) {
758      ret = drmModePropertySetAdd(pset, plane->id(),
759                                  plane->rotation_property().id(), rotation);
760      if (ret) {
761        ALOGE("Failed to add rotation property %d to plane %d",
762              plane->rotation_property().id(), plane->id());
763        break;
764      }
765    }
766
767    if (plane->alpha_property().id()) {
768      ret = drmModePropertySetAdd(pset, plane->id(),
769                                  plane->alpha_property().id(), alpha);
770      if (ret) {
771        ALOGE("Failed to add alpha property %d to plane %d",
772              plane->alpha_property().id(), plane->id());
773        break;
774      }
775    }
776  }
777
778out:
779  if (!ret) {
780    uint32_t flags = DRM_MODE_ATOMIC_ALLOW_MODESET;
781    if (test_only)
782      flags |= DRM_MODE_ATOMIC_TEST_ONLY;
783
784    ret = drmModePropertySetCommit(drm_->fd(), flags, drm_, pset);
785    if (ret) {
786      if (test_only)
787        ALOGI("Commit test pset failed ret=%d\n", ret);
788      else
789        ALOGE("Failed to commit pset ret=%d\n", ret);
790      drmModePropertySetFree(pset);
791      return ret;
792    }
793  }
794  if (pset)
795    drmModePropertySetFree(pset);
796
797  if (!test_only && mode_.needs_modeset) {
798    ret = drm_->DestroyPropertyBlob(mode_.old_blob_id);
799    if (ret) {
800      ALOGE("Failed to destroy old mode property blob %lld/%d",
801            mode_.old_blob_id, ret);
802      return ret;
803    }
804
805    /* TODO: Add dpms to the pset when the kernel supports it */
806    ret = ApplyDpms(display_comp);
807    if (ret) {
808      ALOGE("Failed to apply DPMS after modeset %d\n", ret);
809      return ret;
810    }
811
812    connector->set_active_mode(mode_.mode);
813    mode_.old_blob_id = mode_.blob_id;
814    mode_.blob_id = 0;
815    mode_.needs_modeset = false;
816  }
817
818  return ret;
819}
820
821int DrmDisplayCompositor::ApplyDpms(DrmDisplayComposition *display_comp) {
822  DrmConnector *conn = drm_->GetConnectorForDisplay(display_);
823  if (!conn) {
824    ALOGE("Failed to get DrmConnector for display %d", display_);
825    return -ENODEV;
826  }
827
828  const DrmProperty &prop = conn->dpms_property();
829  int ret = drmModeConnectorSetProperty(drm_->fd(), conn->id(), prop.id(),
830                                        display_comp->dpms_mode());
831  if (ret) {
832    ALOGE("Failed to set DPMS property for connector %d", conn->id());
833    return ret;
834  }
835  return 0;
836}
837
838std::tuple<int, uint32_t> DrmDisplayCompositor::CreateModeBlob(
839    const DrmMode &mode) {
840  struct drm_mode_modeinfo drm_mode;
841  memset(&drm_mode, 0, sizeof(drm_mode));
842  mode.ToDrmModeModeInfo(&drm_mode);
843
844  uint32_t id = 0;
845  int ret = drm_->CreatePropertyBlob(&drm_mode,
846                                     sizeof(struct drm_mode_modeinfo), &id);
847  if (ret) {
848    ALOGE("Failed to create mode property blob %d", ret);
849    return std::make_tuple(ret, 0);
850  }
851  ALOGE("Create blob_id %ld\n", id);
852  return std::make_tuple(ret, id);
853}
854
855void DrmDisplayCompositor::ApplyFrame(
856    std::unique_ptr<DrmDisplayComposition> composition, int status) {
857  int ret = status;
858
859  if (!ret)
860    ret = CommitFrame(composition.get(), false);
861
862  if (ret) {
863    ALOGE("Composite failed for display %d", display_);
864
865    // Disable the hw used by the last active composition. This allows us to
866    // signal the release fences from that composition to avoid hanging.
867    if (DisablePlanes(active_composition_.get()))
868      return;
869  }
870  ++dump_frames_composited_;
871
872  if (active_composition_)
873    active_composition_->SignalCompositionDone();
874
875  ret = pthread_mutex_lock(&lock_);
876  if (ret)
877    ALOGE("Failed to acquire lock for active_composition swap");
878
879  active_composition_.swap(composition);
880
881  if (!ret)
882    ret = pthread_mutex_unlock(&lock_);
883  if (ret)
884    ALOGE("Failed to release lock for active_composition swap");
885}
886
887int DrmDisplayCompositor::Composite() {
888  ATRACE_CALL();
889
890  if (!pre_compositor_) {
891    pre_compositor_.reset(new GLWorkerCompositor());
892    int ret = pre_compositor_->Init();
893    if (ret) {
894      ALOGE("Failed to initialize OpenGL compositor %d", ret);
895      return ret;
896    }
897  }
898
899  int ret = pthread_mutex_lock(&lock_);
900  if (ret) {
901    ALOGE("Failed to acquire compositor lock %d", ret);
902    return ret;
903  }
904  if (composite_queue_.empty()) {
905    ret = pthread_mutex_unlock(&lock_);
906    if (ret)
907      ALOGE("Failed to release compositor lock %d", ret);
908    return ret;
909  }
910
911  std::unique_ptr<DrmDisplayComposition> composition(
912      std::move(composite_queue_.front()));
913
914  composite_queue_.pop();
915
916  ret = pthread_mutex_unlock(&lock_);
917  if (ret) {
918    ALOGE("Failed to release compositor lock %d", ret);
919    return ret;
920  }
921
922  switch (composition->type()) {
923    case DRM_COMPOSITION_TYPE_FRAME:
924      ret = PrepareFrame(composition.get());
925      if (ret) {
926        ALOGE("Failed to prepare frame for display %d", display_);
927        return ret;
928      }
929      // Send the composition to the kernel to ensure we can commit it. This is
930      // just a test, it won't actually commit the frame. If the kernel rejects
931      // it, squash the frame into one layer and use the squashed composition
932      ret = CommitFrame(composition.get(), true);
933      if (ret) {
934        ALOGI("Commit test failed, squashing frame for display %d", display_);
935        std::unique_ptr<DrmDisplayComposition> squashed = CreateComposition();
936        ret = SquashFrame(composition.get(), squashed.get());
937        if (!ret) {
938          composition = std::move(squashed);
939        } else {
940          ALOGE("Failed to squash frame for display %d", display_);
941          return ret;
942        }
943      }
944      frame_worker_.QueueFrame(std::move(composition), ret);
945      break;
946    case DRM_COMPOSITION_TYPE_DPMS:
947      ret = ApplyDpms(composition.get());
948      if (ret)
949        ALOGE("Failed to apply dpms for display %d", display_);
950      return ret;
951    case DRM_COMPOSITION_TYPE_MODESET:
952      mode_.mode = composition->display_mode();
953      if (mode_.blob_id)
954        drm_->DestroyPropertyBlob(mode_.blob_id);
955      std::tie(ret, mode_.blob_id) = CreateModeBlob(mode_.mode);
956      if (ret) {
957        ALOGE("Failed to create mode blob for display %d", display_);
958        return ret;
959      }
960      mode_.needs_modeset = true;
961      return 0;
962    default:
963      ALOGE("Unknown composition type %d", composition->type());
964      return -EINVAL;
965  }
966
967  return ret;
968}
969
970bool DrmDisplayCompositor::HaveQueuedComposites() const {
971  int ret = pthread_mutex_lock(&lock_);
972  if (ret) {
973    ALOGE("Failed to acquire compositor lock %d", ret);
974    return false;
975  }
976
977  bool empty_ret = !composite_queue_.empty();
978
979  ret = pthread_mutex_unlock(&lock_);
980  if (ret) {
981    ALOGE("Failed to release compositor lock %d", ret);
982    return false;
983  }
984
985  return empty_ret;
986}
987
988int DrmDisplayCompositor::SquashAll() {
989  AutoLock lock(&lock_, "compositor");
990  int ret = lock.Lock();
991  if (ret)
992    return ret;
993
994  if (!active_composition_)
995    return 0;
996
997  std::unique_ptr<DrmDisplayComposition> comp = CreateComposition();
998  ret = SquashFrame(active_composition_.get(), comp.get());
999
1000  // ApplyFrame needs the lock
1001  lock.Unlock();
1002
1003  if (!ret)
1004    ApplyFrame(std::move(comp), 0);
1005
1006  return ret;
1007}
1008
1009// Returns:
1010//   - 0 if src is successfully squashed into dst
1011//   - -EALREADY if the src is already squashed
1012//   - Appropriate error if the squash fails
1013int DrmDisplayCompositor::SquashFrame(DrmDisplayComposition *src,
1014                                      DrmDisplayComposition *dst) {
1015  if (src->type() != DRM_COMPOSITION_TYPE_FRAME)
1016    return -ENOTSUP;
1017
1018  std::vector<DrmCompositionPlane> &src_planes = src->composition_planes();
1019  std::vector<DrmHwcLayer> &src_layers = src->layers();
1020
1021  // Make sure there is more than one layer to squash.
1022  size_t src_planes_with_layer = std::count_if(
1023      src_planes.begin(), src_planes.end(), [](DrmCompositionPlane &p) {
1024        return p.source_layer <= DrmCompositionPlane::kSourceLayerMax;
1025      });
1026  if (src_planes_with_layer <= 1)
1027    return -EALREADY;
1028
1029  int pre_comp_layer_index;
1030
1031  int ret = dst->Init(drm_, src->crtc(), src->importer(), src->frame_no());
1032  if (ret) {
1033    ALOGE("Failed to init squash all composition %d", ret);
1034    return ret;
1035  }
1036
1037  std::vector<DrmPlane *> primary_planes;
1038  std::vector<DrmPlane *> fake_overlay_planes;
1039  std::vector<DrmHwcLayer> dst_layers;
1040  for (DrmCompositionPlane &comp_plane : src_planes) {
1041    // Composition planes without DRM planes should never happen
1042    if (comp_plane.plane == NULL) {
1043      ALOGE("Skipping squash all because of NULL plane");
1044      ret = -EINVAL;
1045      goto move_layers_back;
1046    }
1047
1048    if (comp_plane.source_layer == DrmCompositionPlane::kSourceNone)
1049      continue;
1050
1051    // Out of range layers should never happen. If they do, somebody probably
1052    // forgot to replace the symbolic names (kSourceSquash, kSourcePreComp) with
1053    // real ones.
1054    if (comp_plane.source_layer >= src_layers.size()) {
1055      ALOGE("Skipping squash all because of out of range source layer %zu",
1056            comp_plane.source_layer);
1057      ret = -EINVAL;
1058      goto move_layers_back;
1059    }
1060
1061    DrmHwcLayer &layer = src_layers[comp_plane.source_layer];
1062
1063    // Squashing protected layers is impossible.
1064    if (layer.protected_usage()) {
1065      ret = -ENOTSUP;
1066      goto move_layers_back;
1067    }
1068
1069    // The OutputFds point to freed memory after hwc_set returns. They are
1070    // returned to the default to prevent DrmDisplayComposition::Plan from
1071    // filling the OutputFds.
1072    layer.release_fence = OutputFd();
1073    dst_layers.emplace_back(std::move(layer));
1074
1075    if (comp_plane.plane->type() == DRM_PLANE_TYPE_PRIMARY &&
1076        primary_planes.size() == 0)
1077      primary_planes.push_back(comp_plane.plane);
1078    else
1079      dst->AddPlaneDisable(comp_plane.plane);
1080  }
1081
1082  ret = dst->SetLayers(dst_layers.data(), dst_layers.size(), false);
1083  if (ret) {
1084    ALOGE("Failed to set layers for squash all composition %d", ret);
1085    goto move_layers_back;
1086  }
1087
1088  ret =
1089      dst->Plan(NULL /* SquashState */, &primary_planes, &fake_overlay_planes);
1090  if (ret) {
1091    ALOGE("Failed to plan for squash all composition %d", ret);
1092    goto move_layers_back;
1093  }
1094
1095  ret = ApplyPreComposite(dst);
1096  if (ret) {
1097    ALOGE("Failed to pre-composite for squash all composition %d", ret);
1098    goto move_layers_back;
1099  }
1100
1101  pre_comp_layer_index = dst->layers().size() - 1;
1102  framebuffer_index_ = (framebuffer_index_ + 1) % DRM_DISPLAY_BUFFERS;
1103
1104  for (DrmCompositionPlane &plane : dst->composition_planes())
1105    if (plane.source_layer == DrmCompositionPlane::kSourcePreComp)
1106      plane.source_layer = pre_comp_layer_index;
1107
1108  return 0;
1109
1110// TODO(zachr): think of a better way to transfer ownership back to the active
1111// composition.
1112move_layers_back:
1113  for (size_t plane_index = 0;
1114       plane_index < src_planes.size() && plane_index < dst_layers.size();
1115       plane_index++) {
1116    size_t source_layer_index = src_planes[plane_index].source_layer;
1117    src_layers[source_layer_index] = std::move(dst_layers[plane_index]);
1118  }
1119
1120  return ret;
1121}
1122
1123void DrmDisplayCompositor::Dump(std::ostringstream *out) const {
1124  int ret = pthread_mutex_lock(&lock_);
1125  if (ret)
1126    return;
1127
1128  uint64_t num_frames = dump_frames_composited_;
1129  dump_frames_composited_ = 0;
1130
1131  struct timespec ts;
1132  ret = clock_gettime(CLOCK_MONOTONIC, &ts);
1133  if (ret) {
1134    pthread_mutex_unlock(&lock_);
1135    return;
1136  }
1137
1138  uint64_t cur_ts = ts.tv_sec * 1000 * 1000 * 1000 + ts.tv_nsec;
1139  uint64_t num_ms = (cur_ts - dump_last_timestamp_ns_) / (1000 * 1000);
1140  float fps = num_ms ? (num_frames * 1000.0f) / (num_ms) : 0.0f;
1141
1142  *out << "--DrmDisplayCompositor[" << display_
1143       << "]: num_frames=" << num_frames << " num_ms=" << num_ms
1144       << " fps=" << fps << "\n";
1145
1146  dump_last_timestamp_ns_ = cur_ts;
1147
1148  if (active_composition_)
1149    active_composition_->Dump(out);
1150
1151  squash_state_.Dump(out);
1152
1153  pthread_mutex_unlock(&lock_);
1154}
1155}
1156