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      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 <sched.h>
     23 #include <stdlib.h>
     24 #include <time.h>
     25 #include <algorithm>
     26 #include <bitset>
     27 #include <cinttypes>
     28 #include <mutex>
     29 #include <sstream>
     30 #include <vector>
     31 
     32 #include <cutils/log.h>
     33 #include <drm/drm_mode.h>
     34 #include <sync/sync.h>
     35 #include <utils/Trace.h>
     36 
     37 #include "drmcrtc.h"
     38 #include "drmplane.h"
     39 #include "drmresources.h"
     40 #include "glworker.h"
     41 
     42 #define DRM_DISPLAY_COMPOSITOR_MAX_QUEUE_DEPTH 2
     43 
     44 namespace android {
     45 
     46 static const int64_t kSquashWait = 500LL;
     47 
     48 void SquashState::Init(DrmHwcLayer *layers, size_t num_layers) {
     49   generation_number_++;
     50   valid_history_ = 0;
     51   regions_.clear();
     52   last_handles_.clear();
     53 
     54   std::vector<DrmHwcRect<int>> in_rects;
     55   for (size_t i = 0; i < num_layers; i++) {
     56     DrmHwcLayer *layer = &layers[i];
     57     in_rects.emplace_back(layer->display_frame);
     58     last_handles_.push_back(layer->sf_handle);
     59   }
     60 
     61   std::vector<separate_rects::RectSet<uint64_t, int>> out_regions;
     62   separate_rects::separate_rects_64(in_rects, &out_regions);
     63 
     64   for (const separate_rects::RectSet<uint64_t, int> &out_region : out_regions) {
     65     regions_.emplace_back();
     66     Region &region = regions_.back();
     67     region.rect = out_region.rect;
     68     region.layer_refs = out_region.id_set.getBits();
     69   }
     70 }
     71 
     72 void SquashState::GenerateHistory(DrmHwcLayer *layers, size_t num_layers,
     73                                   std::vector<bool> &changed_regions) const {
     74   changed_regions.resize(regions_.size());
     75   if (num_layers != last_handles_.size()) {
     76     ALOGE("SquashState::GenerateHistory expected %zu layers but got %zu layers",
     77           last_handles_.size(), num_layers);
     78     return;
     79   }
     80   std::bitset<kMaxLayers> changed_layers;
     81   for (size_t i = 0; i < last_handles_.size(); i++) {
     82     DrmHwcLayer *layer = &layers[i];
     83     // Protected layers can't be squashed so we treat them as constantly
     84     // changing.
     85     if (layer->protected_usage() || last_handles_[i] != layer->sf_handle)
     86       changed_layers.set(i);
     87   }
     88 
     89   for (size_t i = 0; i < regions_.size(); i++) {
     90     changed_regions[i] = (regions_[i].layer_refs & changed_layers).any();
     91   }
     92 }
     93 
     94 void SquashState::StableRegionsWithMarginalHistory(
     95     const std::vector<bool> &changed_regions,
     96     std::vector<bool> &stable_regions) const {
     97   stable_regions.resize(regions_.size());
     98   for (size_t i = 0; i < regions_.size(); i++) {
     99     stable_regions[i] = !changed_regions[i] && is_stable(i);
    100   }
    101 }
    102 
    103 void SquashState::RecordHistory(DrmHwcLayer *layers, size_t num_layers,
    104                                 const std::vector<bool> &changed_regions) {
    105   if (num_layers != last_handles_.size()) {
    106     ALOGE("SquashState::RecordHistory expected %zu layers but got %zu layers",
    107           last_handles_.size(), num_layers);
    108     return;
    109   }
    110   if (changed_regions.size() != regions_.size()) {
    111     ALOGE("SquashState::RecordHistory expected %zu regions but got %zu regions",
    112           regions_.size(), changed_regions.size());
    113     return;
    114   }
    115 
    116   for (size_t i = 0; i < last_handles_.size(); i++) {
    117     DrmHwcLayer *layer = &layers[i];
    118     last_handles_[i] = layer->sf_handle;
    119   }
    120 
    121   for (size_t i = 0; i < regions_.size(); i++) {
    122     regions_[i].change_history <<= 1;
    123     regions_[i].change_history.set(/* LSB */ 0, changed_regions[i]);
    124   }
    125 
    126   valid_history_++;
    127 }
    128 
    129 bool SquashState::RecordAndCompareSquashed(
    130     const std::vector<bool> &squashed_regions) {
    131   if (squashed_regions.size() != regions_.size()) {
    132     ALOGE(
    133         "SquashState::RecordAndCompareSquashed expected %zu regions but got "
    134         "%zu regions",
    135         regions_.size(), squashed_regions.size());
    136     return false;
    137   }
    138   bool changed = false;
    139   for (size_t i = 0; i < regions_.size(); i++) {
    140     if (regions_[i].squashed != squashed_regions[i]) {
    141       regions_[i].squashed = squashed_regions[i];
    142       changed = true;
    143     }
    144   }
    145   return changed;
    146 }
    147 
    148 void SquashState::Dump(std::ostringstream *out) const {
    149   *out << "----SquashState generation=" << generation_number_
    150        << " history=" << valid_history_ << "\n"
    151        << "    Regions: count=" << regions_.size() << "\n";
    152   for (size_t i = 0; i < regions_.size(); i++) {
    153     const Region &region = regions_[i];
    154     *out << "      [" << i << "]"
    155          << " history=" << region.change_history << " rect";
    156     region.rect.Dump(out);
    157     *out << " layers=(";
    158     bool first = true;
    159     for (size_t layer_index = 0; layer_index < kMaxLayers; layer_index++) {
    160       if ((region.layer_refs &
    161            std::bitset<kMaxLayers>((size_t)1 << layer_index))
    162               .any()) {
    163         if (!first)
    164           *out << " ";
    165         first = false;
    166         *out << layer_index;
    167       }
    168     }
    169     *out << ")";
    170     if (region.squashed)
    171       *out << " squashed";
    172     *out << "\n";
    173   }
    174 }
    175 
    176 static bool UsesSquash(const std::vector<DrmCompositionPlane> &comp_planes) {
    177   return std::any_of(comp_planes.begin(), comp_planes.end(),
    178                      [](const DrmCompositionPlane &plane) {
    179     return plane.type() == DrmCompositionPlane::Type::kSquash;
    180   });
    181 }
    182 
    183 DrmDisplayCompositor::FrameWorker::FrameWorker(DrmDisplayCompositor *compositor)
    184     : QueueWorker("frame-worker", HAL_PRIORITY_URGENT_DISPLAY),
    185       compositor_(compositor) {
    186 }
    187 
    188 int DrmDisplayCompositor::FrameWorker::Init() {
    189   set_max_queue_size(DRM_DISPLAY_COMPOSITOR_MAX_QUEUE_DEPTH);
    190   return InitWorker();
    191 }
    192 
    193 void DrmDisplayCompositor::FrameWorker::QueueFrame(
    194     std::unique_ptr<DrmDisplayComposition> composition, int status) {
    195   std::unique_ptr<FrameState> frame(
    196       new FrameState(std::move(composition), status));
    197 
    198   auto start = std::chrono::high_resolution_clock::now();
    199   int ret = QueueWork(std::move(frame));
    200   if (ret) {
    201     ALOGE("Unable to queue frame work (%d)", ret);
    202     // TODO: error handling (timeout or exit)
    203     return;
    204   }
    205   auto end = std::chrono::high_resolution_clock::now();
    206 
    207   uint64_t duration_us =
    208       std::chrono::duration_cast<std::chrono::microseconds>(end - start)
    209           .count();
    210   if (duration_us > max_duration_us)
    211     max_duration_us = duration_us;
    212 }
    213 
    214 void DrmDisplayCompositor::FrameWorker::ProcessWork(
    215     std::unique_ptr<FrameState> frame) {
    216   compositor_->ApplyFrame(std::move(frame->composition), frame->status);
    217 }
    218 
    219 DrmDisplayCompositor::DrmDisplayCompositor()
    220     : QueueWorker("drm-compositor", HAL_PRIORITY_URGENT_DISPLAY),
    221       drm_(NULL),
    222       display_(-1),
    223       frame_worker_(this),
    224       active_(false),
    225       use_hw_overlays_(true),
    226       framebuffer_index_(0),
    227       squash_framebuffer_index_(0),
    228       dump_frames_composited_(0),
    229       dump_last_timestamp_ns_(0),
    230       max_duration_us(0) {
    231   struct timespec ts;
    232   if (clock_gettime(CLOCK_MONOTONIC, &ts))
    233     return;
    234   dump_last_timestamp_ns_ = ts.tv_sec * 1000 * 1000 * 1000 + ts.tv_nsec;
    235 }
    236 
    237 DrmDisplayCompositor::~DrmDisplayCompositor() {
    238   if (!initialized())
    239     return;
    240 
    241   frame_worker_.Exit();
    242   Exit();
    243 
    244   std::lock_guard<std::mutex> lk(mutex_);
    245 
    246   if (mode_.blob_id)
    247     drm_->DestroyPropertyBlob(mode_.blob_id);
    248   if (mode_.old_blob_id)
    249     drm_->DestroyPropertyBlob(mode_.old_blob_id);
    250 
    251   active_composition_.reset();
    252 }
    253 
    254 int DrmDisplayCompositor::Init(DrmResources *drm, int display) {
    255   drm_ = drm;
    256   display_ = display;
    257 
    258   frame_worker_.Init();
    259 
    260   set_max_queue_size(DRM_DISPLAY_COMPOSITOR_MAX_QUEUE_DEPTH);
    261   set_idle_timeout(kSquashWait);
    262 
    263   return InitWorker();
    264 }
    265 
    266 std::unique_ptr<DrmDisplayComposition> DrmDisplayCompositor::CreateComposition()
    267     const {
    268   return std::unique_ptr<DrmDisplayComposition>(new DrmDisplayComposition());
    269 }
    270 
    271 int DrmDisplayCompositor::QueueComposition(
    272     std::unique_ptr<DrmDisplayComposition> composition) {
    273   switch (composition->type()) {
    274     case DRM_COMPOSITION_TYPE_FRAME:
    275       if (!active_)
    276         return -ENODEV;
    277       break;
    278     case DRM_COMPOSITION_TYPE_DPMS:
    279       /*
    280        * Update the state as soon as we get it so we can start/stop queuing
    281        * frames asap.
    282        */
    283       active_ = (composition->dpms_mode() == DRM_MODE_DPMS_ON);
    284       break;
    285     case DRM_COMPOSITION_TYPE_MODESET:
    286       break;
    287     case DRM_COMPOSITION_TYPE_EMPTY:
    288       return 0;
    289     default:
    290       ALOGE("Unknown composition type %d/%d", composition->type(), display_);
    291       return -ENOENT;
    292   }
    293 
    294   auto start = std::chrono::high_resolution_clock::now();
    295 
    296   int ret = QueueWork(std::move(composition));
    297   if (ret) {
    298     ALOGE("Unable to queue work (%d)", ret);
    299     // TODO: error handling (timeout or exit)
    300     return ret;
    301   }
    302 
    303   auto end = std::chrono::high_resolution_clock::now();
    304 
    305   uint64_t duration_us =
    306       std::chrono::duration_cast<std::chrono::microseconds>(end - start)
    307           .count();
    308   if (duration_us > max_duration_us)
    309     max_duration_us = duration_us;
    310 
    311   return 0;
    312 }
    313 
    314 std::tuple<uint32_t, uint32_t, int>
    315 DrmDisplayCompositor::GetActiveModeResolution() {
    316   DrmConnector *connector = drm_->GetConnectorForDisplay(display_);
    317   if (connector == NULL) {
    318     ALOGE("Failed to determine display mode: no connector for display %d",
    319           display_);
    320     return std::make_tuple(0, 0, -ENODEV);
    321   }
    322 
    323   const DrmMode &mode = connector->active_mode();
    324   return std::make_tuple(mode.h_display(), mode.v_display(), 0);
    325 }
    326 
    327 int DrmDisplayCompositor::PrepareFramebuffer(
    328     DrmFramebuffer &fb, DrmDisplayComposition *display_comp) {
    329   int ret = fb.WaitReleased(-1);
    330   if (ret) {
    331     ALOGE("Failed to wait for framebuffer release %d", ret);
    332     return ret;
    333   }
    334   uint32_t width, height;
    335   std::tie(width, height, ret) = GetActiveModeResolution();
    336   if (ret) {
    337     ALOGE(
    338         "Failed to allocate framebuffer because the display resolution could "
    339         "not be determined %d",
    340         ret);
    341     return ret;
    342   }
    343 
    344   fb.set_release_fence_fd(-1);
    345   if (!fb.Allocate(width, height)) {
    346     ALOGE("Failed to allocate framebuffer with size %dx%d", width, height);
    347     return -ENOMEM;
    348   }
    349 
    350   display_comp->layers().emplace_back();
    351   DrmHwcLayer &pre_comp_layer = display_comp->layers().back();
    352   pre_comp_layer.sf_handle = fb.buffer()->handle;
    353   pre_comp_layer.blending = DrmHwcBlending::kPreMult;
    354   pre_comp_layer.source_crop = DrmHwcRect<float>(0, 0, width, height);
    355   pre_comp_layer.display_frame = DrmHwcRect<int>(0, 0, width, height);
    356   ret = pre_comp_layer.buffer.ImportBuffer(fb.buffer()->handle,
    357                                            display_comp->importer());
    358   if (ret) {
    359     ALOGE("Failed to import framebuffer for display %d", ret);
    360     return ret;
    361   }
    362 
    363   return ret;
    364 }
    365 
    366 int DrmDisplayCompositor::ApplySquash(DrmDisplayComposition *display_comp) {
    367   int ret = 0;
    368 
    369   DrmFramebuffer &fb = squash_framebuffers_[squash_framebuffer_index_];
    370   ret = PrepareFramebuffer(fb, display_comp);
    371   if (ret) {
    372     ALOGE("Failed to prepare framebuffer for squash %d", ret);
    373     return ret;
    374   }
    375 
    376   std::vector<DrmCompositionRegion> &regions = display_comp->squash_regions();
    377   ret = pre_compositor_->Composite(display_comp->layers().data(),
    378                                    regions.data(), regions.size(), fb.buffer(),
    379                                    display_comp->importer());
    380   pre_compositor_->Finish();
    381 
    382   if (ret) {
    383     ALOGE("Failed to squash layers");
    384     return ret;
    385   }
    386 
    387   ret = display_comp->CreateNextTimelineFence();
    388   if (ret <= 0) {
    389     ALOGE("Failed to create squash framebuffer release fence %d", ret);
    390     return ret;
    391   }
    392 
    393   fb.set_release_fence_fd(ret);
    394   display_comp->SignalSquashDone();
    395 
    396   return 0;
    397 }
    398 
    399 int DrmDisplayCompositor::ApplyPreComposite(
    400     DrmDisplayComposition *display_comp) {
    401   int ret = 0;
    402 
    403   DrmFramebuffer &fb = framebuffers_[framebuffer_index_];
    404   ret = PrepareFramebuffer(fb, display_comp);
    405   if (ret) {
    406     ALOGE("Failed to prepare framebuffer for pre-composite %d", ret);
    407     return ret;
    408   }
    409 
    410   std::vector<DrmCompositionRegion> &regions = display_comp->pre_comp_regions();
    411   ret = pre_compositor_->Composite(display_comp->layers().data(),
    412                                    regions.data(), regions.size(), fb.buffer(),
    413                                    display_comp->importer());
    414   pre_compositor_->Finish();
    415 
    416   if (ret) {
    417     ALOGE("Failed to pre-composite layers");
    418     return ret;
    419   }
    420 
    421   ret = display_comp->CreateNextTimelineFence();
    422   if (ret <= 0) {
    423     ALOGE("Failed to create pre-composite framebuffer release fence %d", ret);
    424     return ret;
    425   }
    426 
    427   fb.set_release_fence_fd(ret);
    428   display_comp->SignalPreCompDone();
    429 
    430   return 0;
    431 }
    432 
    433 int DrmDisplayCompositor::DisablePlanes(DrmDisplayComposition *display_comp) {
    434   drmModeAtomicReqPtr pset = drmModeAtomicAlloc();
    435   if (!pset) {
    436     ALOGE("Failed to allocate property set");
    437     return -ENOMEM;
    438   }
    439 
    440   int ret;
    441   std::vector<DrmCompositionPlane> &comp_planes =
    442       display_comp->composition_planes();
    443   for (DrmCompositionPlane &comp_plane : comp_planes) {
    444     DrmPlane *plane = comp_plane.plane();
    445     ret = drmModeAtomicAddProperty(pset, plane->id(),
    446                                    plane->crtc_property().id(), 0) < 0 ||
    447           drmModeAtomicAddProperty(pset, plane->id(), plane->fb_property().id(),
    448                                    0) < 0;
    449     if (ret) {
    450       ALOGE("Failed to add plane %d disable to pset", plane->id());
    451       drmModeAtomicFree(pset);
    452       return ret;
    453     }
    454   }
    455 
    456   ret = drmModeAtomicCommit(drm_->fd(), pset, 0, drm_);
    457   if (ret) {
    458     ALOGE("Failed to commit pset ret=%d\n", ret);
    459     drmModeAtomicFree(pset);
    460     return ret;
    461   }
    462 
    463   drmModeAtomicFree(pset);
    464   return 0;
    465 }
    466 
    467 int DrmDisplayCompositor::PrepareFrame(DrmDisplayComposition *display_comp) {
    468   int ret = 0;
    469 
    470   std::vector<DrmHwcLayer> &layers = display_comp->layers();
    471   std::vector<DrmCompositionPlane> &comp_planes =
    472       display_comp->composition_planes();
    473   std::vector<DrmCompositionRegion> &squash_regions =
    474       display_comp->squash_regions();
    475   std::vector<DrmCompositionRegion> &pre_comp_regions =
    476       display_comp->pre_comp_regions();
    477 
    478   int squash_layer_index = -1;
    479   if (squash_regions.size() > 0) {
    480     squash_framebuffer_index_ = (squash_framebuffer_index_ + 1) % 2;
    481     ret = ApplySquash(display_comp);
    482     if (ret)
    483       return ret;
    484 
    485     squash_layer_index = layers.size() - 1;
    486   } else {
    487     if (UsesSquash(comp_planes)) {
    488       DrmFramebuffer &fb = squash_framebuffers_[squash_framebuffer_index_];
    489       layers.emplace_back();
    490       squash_layer_index = layers.size() - 1;
    491       DrmHwcLayer &squash_layer = layers.back();
    492       ret = squash_layer.buffer.ImportBuffer(fb.buffer()->handle,
    493                                              display_comp->importer());
    494       if (ret) {
    495         ALOGE("Failed to import old squashed framebuffer %d", ret);
    496         return ret;
    497       }
    498       squash_layer.sf_handle = fb.buffer()->handle;
    499       squash_layer.blending = DrmHwcBlending::kPreMult;
    500       squash_layer.source_crop = DrmHwcRect<float>(
    501           0, 0, squash_layer.buffer->width, squash_layer.buffer->height);
    502       squash_layer.display_frame = DrmHwcRect<int>(
    503           0, 0, squash_layer.buffer->width, squash_layer.buffer->height);
    504       ret = display_comp->CreateNextTimelineFence();
    505 
    506       if (ret <= 0) {
    507         ALOGE("Failed to create squash framebuffer release fence %d", ret);
    508         return ret;
    509       }
    510 
    511       fb.set_release_fence_fd(ret);
    512       ret = 0;
    513     }
    514   }
    515 
    516   bool do_pre_comp = pre_comp_regions.size() > 0;
    517   int pre_comp_layer_index = -1;
    518   if (do_pre_comp) {
    519     ret = ApplyPreComposite(display_comp);
    520     if (ret)
    521       return ret;
    522 
    523     pre_comp_layer_index = layers.size() - 1;
    524     framebuffer_index_ = (framebuffer_index_ + 1) % DRM_DISPLAY_BUFFERS;
    525   }
    526 
    527   for (DrmCompositionPlane &comp_plane : comp_planes) {
    528     std::vector<size_t> &source_layers = comp_plane.source_layers();
    529     switch (comp_plane.type()) {
    530       case DrmCompositionPlane::Type::kSquash:
    531         if (source_layers.size())
    532           ALOGE("Squash source_layers is expected to be empty (%zu/%d)",
    533                 source_layers[0], squash_layer_index);
    534         source_layers.push_back(squash_layer_index);
    535         break;
    536       case DrmCompositionPlane::Type::kPrecomp:
    537         if (!do_pre_comp) {
    538           ALOGE(
    539               "Can not use pre composite framebuffer with no pre composite "
    540               "regions");
    541           return -EINVAL;
    542         }
    543         // Replace source_layers with the output of the precomposite
    544         source_layers.clear();
    545         source_layers.push_back(pre_comp_layer_index);
    546         break;
    547       default:
    548         break;
    549     }
    550   }
    551 
    552   return ret;
    553 }
    554 
    555 int DrmDisplayCompositor::CommitFrame(DrmDisplayComposition *display_comp,
    556                                       bool test_only) {
    557   ATRACE_CALL();
    558 
    559   int ret = 0;
    560 
    561   std::vector<DrmHwcLayer> &layers = display_comp->layers();
    562   std::vector<DrmCompositionPlane> &comp_planes =
    563       display_comp->composition_planes();
    564   std::vector<DrmCompositionRegion> &pre_comp_regions =
    565       display_comp->pre_comp_regions();
    566 
    567   DrmConnector *connector = drm_->GetConnectorForDisplay(display_);
    568   if (!connector) {
    569     ALOGE("Could not locate connector for display %d", display_);
    570     return -ENODEV;
    571   }
    572   DrmCrtc *crtc = drm_->GetCrtcForDisplay(display_);
    573   if (!crtc) {
    574     ALOGE("Could not locate crtc for display %d", display_);
    575     return -ENODEV;
    576   }
    577 
    578   drmModeAtomicReqPtr pset = drmModeAtomicAlloc();
    579   if (!pset) {
    580     ALOGE("Failed to allocate property set");
    581     return -ENOMEM;
    582   }
    583 
    584   if (mode_.needs_modeset) {
    585     ret = drmModeAtomicAddProperty(pset, crtc->id(), crtc->mode_property().id(),
    586                                    mode_.blob_id) < 0 ||
    587           drmModeAtomicAddProperty(pset, connector->id(),
    588                                    connector->crtc_id_property().id(),
    589                                    crtc->id()) < 0;
    590     if (ret) {
    591       ALOGE("Failed to add blob %d to pset", mode_.blob_id);
    592       drmModeAtomicFree(pset);
    593       return ret;
    594     }
    595   }
    596 
    597   for (DrmCompositionPlane &comp_plane : comp_planes) {
    598     DrmPlane *plane = comp_plane.plane();
    599     DrmCrtc *crtc = comp_plane.crtc();
    600     std::vector<size_t> &source_layers = comp_plane.source_layers();
    601 
    602     int fb_id = -1;
    603     DrmHwcRect<int> display_frame;
    604     DrmHwcRect<float> source_crop;
    605     uint64_t rotation = 0;
    606     uint64_t alpha = 0xFF;
    607 
    608     if (comp_plane.type() != DrmCompositionPlane::Type::kDisable) {
    609       if (source_layers.size() > 1) {
    610         ALOGE("Can't handle more than one source layer sz=%zu type=%d",
    611               source_layers.size(), comp_plane.type());
    612         continue;
    613       }
    614 
    615       if (source_layers.empty() || source_layers.front() >= layers.size()) {
    616         ALOGE("Source layer index %zu out of bounds %zu type=%d",
    617               source_layers.front(), layers.size(), comp_plane.type());
    618         break;
    619       }
    620       DrmHwcLayer &layer = layers[source_layers.front()];
    621       if (!test_only && layer.acquire_fence.get() >= 0) {
    622         int acquire_fence = layer.acquire_fence.get();
    623         int total_fence_timeout = 0;
    624         for (int i = 0; i < kAcquireWaitTries; ++i) {
    625           int fence_timeout = kAcquireWaitTimeoutMs * (1 << i);
    626           total_fence_timeout += fence_timeout;
    627           ret = sync_wait(acquire_fence, fence_timeout);
    628           if (ret)
    629             ALOGW("Acquire fence %d wait %d failed (%d). Total time %d",
    630                   acquire_fence, i, ret, total_fence_timeout);
    631           else
    632             break;
    633         }
    634         if (ret) {
    635           ALOGE("Failed to wait for acquire %d/%d", acquire_fence, ret);
    636           break;
    637         }
    638         layer.acquire_fence.Close();
    639       }
    640       if (!layer.buffer) {
    641         ALOGE("Expected a valid framebuffer for pset");
    642         break;
    643       }
    644       fb_id = layer.buffer->fb_id;
    645       display_frame = layer.display_frame;
    646       source_crop = layer.source_crop;
    647       if (layer.blending == DrmHwcBlending::kPreMult)
    648         alpha = layer.alpha;
    649 
    650       rotation = 0;
    651       if (layer.transform & DrmHwcTransform::kFlipH)
    652         rotation |= 1 << DRM_REFLECT_X;
    653       if (layer.transform & DrmHwcTransform::kFlipV)
    654         rotation |= 1 << DRM_REFLECT_Y;
    655       if (layer.transform & DrmHwcTransform::kRotate90)
    656         rotation |= 1 << DRM_ROTATE_90;
    657       else if (layer.transform & DrmHwcTransform::kRotate180)
    658         rotation |= 1 << DRM_ROTATE_180;
    659       else if (layer.transform & DrmHwcTransform::kRotate270)
    660         rotation |= 1 << DRM_ROTATE_270;
    661     }
    662     // Disable the plane if there's no framebuffer
    663     if (fb_id < 0) {
    664       ret = drmModeAtomicAddProperty(pset, plane->id(),
    665                                      plane->crtc_property().id(), 0) < 0 ||
    666             drmModeAtomicAddProperty(pset, plane->id(),
    667                                      plane->fb_property().id(), 0) < 0;
    668       if (ret) {
    669         ALOGE("Failed to add plane %d disable to pset", plane->id());
    670         break;
    671       }
    672       continue;
    673     }
    674 
    675     // TODO: Once we have atomic test, this should fall back to GL
    676     if (rotation && plane->rotation_property().id() == 0) {
    677       ALOGE("Rotation is not supported on plane %d", plane->id());
    678       ret = -EINVAL;
    679       break;
    680     }
    681 
    682     // TODO: Once we have atomic test, this should fall back to GL
    683     if (alpha != 0xFF && plane->alpha_property().id() == 0) {
    684       ALOGE("Alpha is not supported on plane %d", plane->id());
    685       ret = -EINVAL;
    686       break;
    687     }
    688 
    689     ret = drmModeAtomicAddProperty(pset, plane->id(),
    690                                    plane->crtc_property().id(), crtc->id()) < 0;
    691     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    692                                     plane->fb_property().id(), fb_id) < 0;
    693     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    694                                     plane->crtc_x_property().id(),
    695                                     display_frame.left) < 0;
    696     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    697                                     plane->crtc_y_property().id(),
    698                                     display_frame.top) < 0;
    699     ret |= drmModeAtomicAddProperty(
    700                pset, plane->id(), plane->crtc_w_property().id(),
    701                display_frame.right - display_frame.left) < 0;
    702     ret |= drmModeAtomicAddProperty(
    703                pset, plane->id(), plane->crtc_h_property().id(),
    704                display_frame.bottom - display_frame.top) < 0;
    705     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    706                                     plane->src_x_property().id(),
    707                                     (int)(source_crop.left) << 16) < 0;
    708     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    709                                     plane->src_y_property().id(),
    710                                     (int)(source_crop.top) << 16) < 0;
    711     ret |= drmModeAtomicAddProperty(
    712                pset, plane->id(), plane->src_w_property().id(),
    713                (int)(source_crop.right - source_crop.left) << 16) < 0;
    714     ret |= drmModeAtomicAddProperty(
    715                pset, plane->id(), plane->src_h_property().id(),
    716                (int)(source_crop.bottom - source_crop.top) << 16) < 0;
    717     if (ret) {
    718       ALOGE("Failed to add plane %d to set", plane->id());
    719       break;
    720     }
    721 
    722     if (plane->rotation_property().id()) {
    723       ret = drmModeAtomicAddProperty(pset, plane->id(),
    724                                      plane->rotation_property().id(),
    725                                      rotation) < 0;
    726       if (ret) {
    727         ALOGE("Failed to add rotation property %d to plane %d",
    728               plane->rotation_property().id(), plane->id());
    729         break;
    730       }
    731     }
    732 
    733     if (plane->alpha_property().id()) {
    734       ret = drmModeAtomicAddProperty(pset, plane->id(),
    735                                      plane->alpha_property().id(),
    736                                      alpha) < 0;
    737       if (ret) {
    738         ALOGE("Failed to add alpha property %d to plane %d",
    739               plane->alpha_property().id(), plane->id());
    740         break;
    741       }
    742     }
    743   }
    744 
    745 out:
    746   if (!ret) {
    747     uint32_t flags = DRM_MODE_ATOMIC_ALLOW_MODESET;
    748     if (test_only)
    749       flags |= DRM_MODE_ATOMIC_TEST_ONLY;
    750 
    751     ret = drmModeAtomicCommit(drm_->fd(), pset, flags, drm_);
    752     if (ret) {
    753       if (test_only)
    754         ALOGI("Commit test pset failed ret=%d\n", ret);
    755       else
    756         ALOGE("Failed to commit pset ret=%d\n", ret);
    757       drmModeAtomicFree(pset);
    758       return ret;
    759     }
    760   }
    761   if (pset)
    762     drmModeAtomicFree(pset);
    763 
    764   if (!test_only && mode_.needs_modeset) {
    765     ret = drm_->DestroyPropertyBlob(mode_.old_blob_id);
    766     if (ret) {
    767       ALOGE("Failed to destroy old mode property blob %" PRIu32 "/%d",
    768             mode_.old_blob_id, ret);
    769       return ret;
    770     }
    771 
    772     /* TODO: Add dpms to the pset when the kernel supports it */
    773     ret = ApplyDpms(display_comp);
    774     if (ret) {
    775       ALOGE("Failed to apply DPMS after modeset %d\n", ret);
    776       return ret;
    777     }
    778 
    779     connector->set_active_mode(mode_.mode);
    780     mode_.old_blob_id = mode_.blob_id;
    781     mode_.blob_id = 0;
    782     mode_.needs_modeset = false;
    783   }
    784 
    785   return ret;
    786 }
    787 
    788 int DrmDisplayCompositor::ApplyDpms(DrmDisplayComposition *display_comp) {
    789   DrmConnector *conn = drm_->GetConnectorForDisplay(display_);
    790   if (!conn) {
    791     ALOGE("Failed to get DrmConnector for display %d", display_);
    792     return -ENODEV;
    793   }
    794 
    795   const DrmProperty &prop = conn->dpms_property();
    796   int ret = drmModeConnectorSetProperty(drm_->fd(), conn->id(), prop.id(),
    797                                         display_comp->dpms_mode());
    798   if (ret) {
    799     ALOGE("Failed to set DPMS property for connector %d", conn->id());
    800     return ret;
    801   }
    802   return 0;
    803 }
    804 
    805 std::tuple<int, uint32_t> DrmDisplayCompositor::CreateModeBlob(
    806     const DrmMode &mode) {
    807   struct drm_mode_modeinfo drm_mode;
    808   memset(&drm_mode, 0, sizeof(drm_mode));
    809   mode.ToDrmModeModeInfo(&drm_mode);
    810 
    811   uint32_t id = 0;
    812   int ret = drm_->CreatePropertyBlob(&drm_mode,
    813                                      sizeof(struct drm_mode_modeinfo), &id);
    814   if (ret) {
    815     ALOGE("Failed to create mode property blob %d", ret);
    816     return std::make_tuple(ret, 0);
    817   }
    818   ALOGE("Create blob_id %" PRIu32 "\n", id);
    819   return std::make_tuple(ret, id);
    820 }
    821 
    822 void DrmDisplayCompositor::ClearDisplay() {
    823   std::lock_guard<std::mutex> lk(mutex_);
    824   if (!active_composition_)
    825     return;
    826 
    827   if (DisablePlanes(active_composition_.get()))
    828     return;
    829 
    830   active_composition_->SignalCompositionDone();
    831 
    832   active_composition_.reset(NULL);
    833 }
    834 
    835 void DrmDisplayCompositor::ApplyFrame(
    836     std::unique_ptr<DrmDisplayComposition> composition, int status) {
    837   int ret = status;
    838 
    839   if (!ret)
    840     ret = CommitFrame(composition.get(), false);
    841 
    842   if (ret) {
    843     ALOGE("Composite failed for display %d", display_);
    844     // Disable the hw used by the last active composition. This allows us to
    845     // signal the release fences from that composition to avoid hanging.
    846     ClearDisplay();
    847     return;
    848   }
    849   ++dump_frames_composited_;
    850 
    851   if (active_composition_)
    852     active_composition_->SignalCompositionDone();
    853 
    854   std::lock_guard<std::mutex> lk(mutex_);
    855   active_composition_.swap(composition);
    856 }
    857 
    858 void DrmDisplayCompositor::ProcessWork(
    859     std::unique_ptr<DrmDisplayComposition> composition) {
    860   ATRACE_CALL();
    861 
    862   if (!pre_compositor_) {
    863     pre_compositor_.reset(new GLWorkerCompositor());
    864     int ret = pre_compositor_->Init();
    865     if (ret) {
    866       ALOGE("Failed to initialize OpenGL compositor %d", ret);
    867       return;
    868     }
    869   }
    870 
    871   int ret;
    872   switch (composition->type()) {
    873     case DRM_COMPOSITION_TYPE_FRAME:
    874       ret = PrepareFrame(composition.get());
    875       if (ret) {
    876         ALOGE("Failed to prepare frame for display %d", display_);
    877         return;
    878       }
    879       if (composition->geometry_changed()) {
    880         // Send the composition to the kernel to ensure we can commit it. This
    881         // is just a test, it won't actually commit the frame. If rejected,
    882         // squash the frame into one layer and use the squashed composition
    883         ret = CommitFrame(composition.get(), true);
    884         if (ret)
    885           ALOGI("Commit test failed, squashing frame for display %d", display_);
    886         use_hw_overlays_ = !ret;
    887       }
    888 
    889       // If use_hw_overlays_ is false, we can't use hardware to composite the
    890       // frame. So squash all layers into a single composition and queue that
    891       // instead.
    892       if (!use_hw_overlays_) {
    893         std::unique_ptr<DrmDisplayComposition> squashed = CreateComposition();
    894         ret = SquashFrame(composition.get(), squashed.get());
    895         if (!ret) {
    896           composition = std::move(squashed);
    897         } else {
    898           ALOGE("Failed to squash frame for display %d", display_);
    899           // Disable the hw used by the last active composition. This allows us
    900           // to signal the release fences from that composition to avoid
    901           // hanging.
    902           ClearDisplay();
    903           return;
    904         }
    905       }
    906       frame_worker_.QueueFrame(std::move(composition), ret);
    907       break;
    908     case DRM_COMPOSITION_TYPE_DPMS:
    909       ret = ApplyDpms(composition.get());
    910       if (ret)
    911         ALOGE("Failed to apply dpms for display %d", display_);
    912       break;
    913     case DRM_COMPOSITION_TYPE_MODESET:
    914       mode_.mode = composition->display_mode();
    915       if (mode_.blob_id)
    916         drm_->DestroyPropertyBlob(mode_.blob_id);
    917       std::tie(ret, mode_.blob_id) = CreateModeBlob(mode_.mode);
    918       if (ret) {
    919         ALOGE("Failed to create mode blob for display %d", display_);
    920         return;
    921       }
    922       mode_.needs_modeset = true;
    923       break;
    924     default:
    925       ALOGE("Unknown composition type %d", composition->type());
    926       break;
    927   }
    928 }
    929 
    930 int DrmDisplayCompositor::SquashAll() {
    931   std::unique_lock<std::mutex> lk(mutex_);
    932   int ret;
    933 
    934   if (!active_composition_)
    935     return 0;
    936 
    937   std::unique_ptr<DrmDisplayComposition> comp = CreateComposition();
    938   ret = SquashFrame(active_composition_.get(), comp.get());
    939 
    940   // ApplyFrame needs the lock
    941   lk.unlock();
    942 
    943   if (!ret)
    944     ApplyFrame(std::move(comp), 0);
    945 
    946   return ret;
    947 }
    948 
    949 // Returns:
    950 //   - 0 if src is successfully squashed into dst
    951 //   - -EALREADY if the src is already squashed
    952 //   - Appropriate error if the squash fails
    953 int DrmDisplayCompositor::SquashFrame(DrmDisplayComposition *src,
    954                                       DrmDisplayComposition *dst) {
    955   if (src->type() != DRM_COMPOSITION_TYPE_FRAME)
    956     return -ENOTSUP;
    957 
    958   std::vector<DrmCompositionPlane> &src_planes = src->composition_planes();
    959   std::vector<DrmHwcLayer> &src_layers = src->layers();
    960 
    961   // Make sure there is more than one layer to squash.
    962   size_t src_planes_with_layer = std::count_if(
    963       src_planes.begin(), src_planes.end(), [](DrmCompositionPlane &p) {
    964         return p.type() != DrmCompositionPlane::Type::kDisable;
    965       });
    966   if (src_planes_with_layer <= 1)
    967     return -EALREADY;
    968 
    969   int pre_comp_layer_index;
    970 
    971   int ret = dst->Init(drm_, src->crtc(), src->importer(), src->planner(),
    972                       src->frame_no());
    973   if (ret) {
    974     ALOGE("Failed to init squash all composition %d", ret);
    975     return ret;
    976   }
    977 
    978   DrmCompositionPlane squashed_comp(DrmCompositionPlane::Type::kPrecomp, NULL,
    979                                     src->crtc());
    980   std::vector<DrmHwcLayer> dst_layers;
    981   for (DrmCompositionPlane &comp_plane : src_planes) {
    982     // Composition planes without DRM planes should never happen
    983     if (comp_plane.plane() == NULL) {
    984       ALOGE("Skipping squash all because of NULL plane");
    985       ret = -EINVAL;
    986       goto move_layers_back;
    987     }
    988 
    989     if (comp_plane.plane()->type() == DRM_PLANE_TYPE_PRIMARY)
    990       squashed_comp.set_plane(comp_plane.plane());
    991     else
    992       dst->AddPlaneDisable(comp_plane.plane());
    993 
    994     if (comp_plane.type() == DrmCompositionPlane::Type::kDisable)
    995       continue;
    996 
    997     for (auto i : comp_plane.source_layers()) {
    998       DrmHwcLayer &layer = src_layers[i];
    999 
   1000       // Squashing protected layers is impossible.
   1001       if (layer.protected_usage()) {
   1002         ret = -ENOTSUP;
   1003         goto move_layers_back;
   1004       }
   1005 
   1006       // The OutputFds point to freed memory after hwc_set returns. They are
   1007       // returned to the default to prevent DrmDisplayComposition::Plan from
   1008       // filling the OutputFds.
   1009       layer.release_fence = OutputFd();
   1010       dst_layers.emplace_back(std::move(layer));
   1011       squashed_comp.source_layers().push_back(
   1012           squashed_comp.source_layers().size());
   1013     }
   1014   }
   1015 
   1016   if (squashed_comp.plane() == NULL) {
   1017     ALOGE("Primary plane not found for squash");
   1018     ret = -ENOTSUP;
   1019     goto move_layers_back;
   1020   }
   1021 
   1022   ret = dst->SetLayers(dst_layers.data(), dst_layers.size(), false);
   1023   if (ret) {
   1024     ALOGE("Failed to set layers for squash all composition %d", ret);
   1025     goto move_layers_back;
   1026   }
   1027 
   1028   ret = dst->AddPlaneComposition(std::move(squashed_comp));
   1029   if (ret) {
   1030     ALOGE("Failed to add squashed plane composition %d", ret);
   1031     goto move_layers_back;
   1032   }
   1033 
   1034   ret = dst->FinalizeComposition();
   1035   if (ret) {
   1036     ALOGE("Failed to plan for squash all composition %d", ret);
   1037     goto move_layers_back;
   1038   }
   1039 
   1040   ret = ApplyPreComposite(dst);
   1041   if (ret) {
   1042     ALOGE("Failed to pre-composite for squash all composition %d", ret);
   1043     goto move_layers_back;
   1044   }
   1045 
   1046   pre_comp_layer_index = dst->layers().size() - 1;
   1047   framebuffer_index_ = (framebuffer_index_ + 1) % DRM_DISPLAY_BUFFERS;
   1048 
   1049   for (DrmCompositionPlane &plane : dst->composition_planes()) {
   1050     if (plane.type() == DrmCompositionPlane::Type::kPrecomp) {
   1051       // Replace source_layers with the output of the precomposite
   1052       plane.source_layers().clear();
   1053       plane.source_layers().push_back(pre_comp_layer_index);
   1054       break;
   1055     }
   1056   }
   1057 
   1058   return 0;
   1059 
   1060 // TODO(zachr): think of a better way to transfer ownership back to the active
   1061 // composition.
   1062 move_layers_back:
   1063   for (size_t plane_index = 0;
   1064        plane_index < src_planes.size() && plane_index < dst_layers.size();) {
   1065     if (src_planes[plane_index].source_layers().empty()) {
   1066       plane_index++;
   1067       continue;
   1068     }
   1069     for (auto i : src_planes[plane_index].source_layers())
   1070       src_layers[i] = std::move(dst_layers[plane_index++]);
   1071   }
   1072 
   1073   return ret;
   1074 }
   1075 
   1076 void DrmDisplayCompositor::Dump(std::ostringstream *out) const {
   1077   std::lock_guard<std::mutex> lk(mutex_);
   1078   uint64_t num_frames = dump_frames_composited_;
   1079   dump_frames_composited_ = 0;
   1080 
   1081   struct timespec ts;
   1082   int ret = clock_gettime(CLOCK_MONOTONIC, &ts);
   1083   if (ret) {
   1084     return;
   1085   }
   1086 
   1087   uint64_t cur_ts = ts.tv_sec * 1000 * 1000 * 1000 + ts.tv_nsec;
   1088   uint64_t num_ms = (cur_ts - dump_last_timestamp_ns_) / (1000 * 1000);
   1089   float fps = num_ms ? (num_frames * 1000.0f) / (num_ms) : 0.0f;
   1090 
   1091   *out << "--DrmDisplayCompositor[" << display_
   1092        << "]: num_frames=" << num_frames << " num_ms=" << num_ms
   1093        << " fps=" << fps << "\n";
   1094 
   1095   dump_last_timestamp_ns_ = cur_ts;
   1096 
   1097   *out << "----Jank Stats: "
   1098        << " compositor_max_q_wait_us=" << max_duration_us
   1099        << " frameworker_max_q_wait_us=" << frame_worker_.max_duration_us
   1100        << "\n";
   1101 
   1102   max_duration_us = 0;
   1103   frame_worker_.max_duration_us = 0;
   1104 
   1105   if (active_composition_)
   1106     active_composition_->Dump(out);
   1107 
   1108   squash_state_.Dump(out);
   1109 }
   1110 
   1111 void DrmDisplayCompositor::ProcessIdle() {
   1112   SquashAll();
   1113 }
   1114 }
   1115