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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   pre_compositor_->Finish();
    380 
    381   if (ret) {
    382     ALOGE("Failed to squash layers");
    383     return ret;
    384   }
    385 
    386   ret = display_comp->CreateNextTimelineFence();
    387   if (ret <= 0) {
    388     ALOGE("Failed to create squash framebuffer release fence %d", ret);
    389     return ret;
    390   }
    391 
    392   fb.set_release_fence_fd(ret);
    393   display_comp->SignalSquashDone();
    394 
    395   return 0;
    396 }
    397 
    398 int DrmDisplayCompositor::ApplyPreComposite(
    399     DrmDisplayComposition *display_comp) {
    400   int ret = 0;
    401 
    402   DrmFramebuffer &fb = framebuffers_[framebuffer_index_];
    403   ret = PrepareFramebuffer(fb, display_comp);
    404   if (ret) {
    405     ALOGE("Failed to prepare framebuffer for pre-composite %d", ret);
    406     return ret;
    407   }
    408 
    409   std::vector<DrmCompositionRegion> &regions = display_comp->pre_comp_regions();
    410   ret = pre_compositor_->Composite(display_comp->layers().data(),
    411                                    regions.data(), regions.size(), fb.buffer());
    412   pre_compositor_->Finish();
    413 
    414   if (ret) {
    415     ALOGE("Failed to pre-composite layers");
    416     return ret;
    417   }
    418 
    419   ret = display_comp->CreateNextTimelineFence();
    420   if (ret <= 0) {
    421     ALOGE("Failed to create pre-composite framebuffer release fence %d", ret);
    422     return ret;
    423   }
    424 
    425   fb.set_release_fence_fd(ret);
    426   display_comp->SignalPreCompDone();
    427 
    428   return 0;
    429 }
    430 
    431 int DrmDisplayCompositor::DisablePlanes(DrmDisplayComposition *display_comp) {
    432   drmModeAtomicReqPtr pset = drmModeAtomicAlloc();
    433   if (!pset) {
    434     ALOGE("Failed to allocate property set");
    435     return -ENOMEM;
    436   }
    437 
    438   int ret;
    439   std::vector<DrmCompositionPlane> &comp_planes =
    440       display_comp->composition_planes();
    441   for (DrmCompositionPlane &comp_plane : comp_planes) {
    442     DrmPlane *plane = comp_plane.plane();
    443     ret = drmModeAtomicAddProperty(pset, plane->id(),
    444                                    plane->crtc_property().id(), 0) < 0 ||
    445           drmModeAtomicAddProperty(pset, plane->id(), plane->fb_property().id(),
    446                                    0) < 0;
    447     if (ret) {
    448       ALOGE("Failed to add plane %d disable to pset", plane->id());
    449       drmModeAtomicFree(pset);
    450       return ret;
    451     }
    452   }
    453 
    454   ret = drmModeAtomicCommit(drm_->fd(), pset, 0, drm_);
    455   if (ret) {
    456     ALOGE("Failed to commit pset ret=%d\n", ret);
    457     drmModeAtomicFree(pset);
    458     return ret;
    459   }
    460 
    461   drmModeAtomicFree(pset);
    462   return 0;
    463 }
    464 
    465 int DrmDisplayCompositor::PrepareFrame(DrmDisplayComposition *display_comp) {
    466   int ret = 0;
    467 
    468   std::vector<DrmHwcLayer> &layers = display_comp->layers();
    469   std::vector<DrmCompositionPlane> &comp_planes =
    470       display_comp->composition_planes();
    471   std::vector<DrmCompositionRegion> &squash_regions =
    472       display_comp->squash_regions();
    473   std::vector<DrmCompositionRegion> &pre_comp_regions =
    474       display_comp->pre_comp_regions();
    475 
    476   int squash_layer_index = -1;
    477   if (squash_regions.size() > 0) {
    478     squash_framebuffer_index_ = (squash_framebuffer_index_ + 1) % 2;
    479     ret = ApplySquash(display_comp);
    480     if (ret)
    481       return ret;
    482 
    483     squash_layer_index = layers.size() - 1;
    484   } else {
    485     if (UsesSquash(comp_planes)) {
    486       DrmFramebuffer &fb = squash_framebuffers_[squash_framebuffer_index_];
    487       layers.emplace_back();
    488       squash_layer_index = layers.size() - 1;
    489       DrmHwcLayer &squash_layer = layers.back();
    490       ret = squash_layer.buffer.ImportBuffer(fb.buffer()->handle,
    491                                              display_comp->importer());
    492       if (ret) {
    493         ALOGE("Failed to import old squashed framebuffer %d", ret);
    494         return ret;
    495       }
    496       squash_layer.sf_handle = fb.buffer()->handle;
    497       squash_layer.blending = DrmHwcBlending::kPreMult;
    498       squash_layer.source_crop = DrmHwcRect<float>(
    499           0, 0, squash_layer.buffer->width, squash_layer.buffer->height);
    500       squash_layer.display_frame = DrmHwcRect<int>(
    501           0, 0, squash_layer.buffer->width, squash_layer.buffer->height);
    502       ret = display_comp->CreateNextTimelineFence();
    503 
    504       if (ret <= 0) {
    505         ALOGE("Failed to create squash framebuffer release fence %d", ret);
    506         return ret;
    507       }
    508 
    509       fb.set_release_fence_fd(ret);
    510       ret = 0;
    511     }
    512   }
    513 
    514   bool do_pre_comp = pre_comp_regions.size() > 0;
    515   int pre_comp_layer_index = -1;
    516   if (do_pre_comp) {
    517     ret = ApplyPreComposite(display_comp);
    518     if (ret)
    519       return ret;
    520 
    521     pre_comp_layer_index = layers.size() - 1;
    522     framebuffer_index_ = (framebuffer_index_ + 1) % DRM_DISPLAY_BUFFERS;
    523   }
    524 
    525   for (DrmCompositionPlane &comp_plane : comp_planes) {
    526     std::vector<size_t> &source_layers = comp_plane.source_layers();
    527     switch (comp_plane.type()) {
    528       case DrmCompositionPlane::Type::kSquash:
    529         if (source_layers.size())
    530           ALOGE("Squash source_layers is expected to be empty (%zu/%d)",
    531                 source_layers[0], squash_layer_index);
    532         source_layers.push_back(squash_layer_index);
    533         break;
    534       case DrmCompositionPlane::Type::kPrecomp:
    535         if (!do_pre_comp) {
    536           ALOGE(
    537               "Can not use pre composite framebuffer with no pre composite "
    538               "regions");
    539           return -EINVAL;
    540         }
    541         // Replace source_layers with the output of the precomposite
    542         source_layers.clear();
    543         source_layers.push_back(pre_comp_layer_index);
    544         break;
    545       default:
    546         break;
    547     }
    548   }
    549 
    550   return ret;
    551 }
    552 
    553 int DrmDisplayCompositor::CommitFrame(DrmDisplayComposition *display_comp,
    554                                       bool test_only) {
    555   ATRACE_CALL();
    556 
    557   int ret = 0;
    558 
    559   std::vector<DrmHwcLayer> &layers = display_comp->layers();
    560   std::vector<DrmCompositionPlane> &comp_planes =
    561       display_comp->composition_planes();
    562   std::vector<DrmCompositionRegion> &pre_comp_regions =
    563       display_comp->pre_comp_regions();
    564 
    565   DrmConnector *connector = drm_->GetConnectorForDisplay(display_);
    566   if (!connector) {
    567     ALOGE("Could not locate connector for display %d", display_);
    568     return -ENODEV;
    569   }
    570   DrmCrtc *crtc = drm_->GetCrtcForDisplay(display_);
    571   if (!crtc) {
    572     ALOGE("Could not locate crtc for display %d", display_);
    573     return -ENODEV;
    574   }
    575 
    576   drmModeAtomicReqPtr pset = drmModeAtomicAlloc();
    577   if (!pset) {
    578     ALOGE("Failed to allocate property set");
    579     return -ENOMEM;
    580   }
    581 
    582   if (mode_.needs_modeset) {
    583     ret = drmModeAtomicAddProperty(pset, crtc->id(), crtc->mode_property().id(),
    584                                    mode_.blob_id) < 0 ||
    585           drmModeAtomicAddProperty(pset, connector->id(),
    586                                    connector->crtc_id_property().id(),
    587                                    crtc->id()) < 0;
    588     if (ret) {
    589       ALOGE("Failed to add blob %d to pset", mode_.blob_id);
    590       drmModeAtomicFree(pset);
    591       return ret;
    592     }
    593   }
    594 
    595   for (DrmCompositionPlane &comp_plane : comp_planes) {
    596     DrmPlane *plane = comp_plane.plane();
    597     DrmCrtc *crtc = comp_plane.crtc();
    598     std::vector<size_t> &source_layers = comp_plane.source_layers();
    599 
    600     int fb_id = -1;
    601     DrmHwcRect<int> display_frame;
    602     DrmHwcRect<float> source_crop;
    603     uint64_t rotation = 0;
    604     uint64_t alpha = 0xFF;
    605 
    606     if (comp_plane.type() != DrmCompositionPlane::Type::kDisable) {
    607       if (source_layers.size() > 1) {
    608         ALOGE("Can't handle more than one source layer sz=%zu type=%d",
    609               source_layers.size(), comp_plane.type());
    610         continue;
    611       }
    612 
    613       if (source_layers.empty() || source_layers.front() >= layers.size()) {
    614         ALOGE("Source layer index %zu out of bounds %zu type=%d",
    615               source_layers.front(), layers.size(), comp_plane.type());
    616         break;
    617       }
    618       DrmHwcLayer &layer = layers[source_layers.front()];
    619       if (!test_only && layer.acquire_fence.get() >= 0) {
    620         int acquire_fence = layer.acquire_fence.get();
    621         int total_fence_timeout = 0;
    622         for (int i = 0; i < kAcquireWaitTries; ++i) {
    623           int fence_timeout = kAcquireWaitTimeoutMs * (1 << i);
    624           total_fence_timeout += fence_timeout;
    625           ret = sync_wait(acquire_fence, fence_timeout);
    626           if (ret)
    627             ALOGW("Acquire fence %d wait %d failed (%d). Total time %d",
    628                   acquire_fence, i, ret, total_fence_timeout);
    629         }
    630         if (ret) {
    631           ALOGE("Failed to wait for acquire %d/%d", acquire_fence, ret);
    632           break;
    633         }
    634         layer.acquire_fence.Close();
    635       }
    636       if (!layer.buffer) {
    637         ALOGE("Expected a valid framebuffer for pset");
    638         break;
    639       }
    640       fb_id = layer.buffer->fb_id;
    641       display_frame = layer.display_frame;
    642       source_crop = layer.source_crop;
    643       if (layer.blending == DrmHwcBlending::kPreMult)
    644         alpha = layer.alpha;
    645 
    646       rotation = 0;
    647       if (layer.transform & DrmHwcTransform::kFlipH)
    648         rotation |= 1 << DRM_REFLECT_X;
    649       if (layer.transform & DrmHwcTransform::kFlipV)
    650         rotation |= 1 << DRM_REFLECT_Y;
    651       if (layer.transform & DrmHwcTransform::kRotate90)
    652         rotation |= 1 << DRM_ROTATE_90;
    653       else if (layer.transform & DrmHwcTransform::kRotate180)
    654         rotation |= 1 << DRM_ROTATE_180;
    655       else if (layer.transform & DrmHwcTransform::kRotate270)
    656         rotation |= 1 << DRM_ROTATE_270;
    657     }
    658     // Disable the plane if there's no framebuffer
    659     if (fb_id < 0) {
    660       ret = drmModeAtomicAddProperty(pset, plane->id(),
    661                                      plane->crtc_property().id(), 0) < 0 ||
    662             drmModeAtomicAddProperty(pset, plane->id(),
    663                                      plane->fb_property().id(), 0) < 0;
    664       if (ret) {
    665         ALOGE("Failed to add plane %d disable to pset", plane->id());
    666         break;
    667       }
    668       continue;
    669     }
    670 
    671     // TODO: Once we have atomic test, this should fall back to GL
    672     if (rotation && plane->rotation_property().id() == 0) {
    673       ALOGE("Rotation is not supported on plane %d", plane->id());
    674       ret = -EINVAL;
    675       break;
    676     }
    677 
    678     // TODO: Once we have atomic test, this should fall back to GL
    679     if (alpha != 0xFF && plane->alpha_property().id() == 0) {
    680       ALOGE("Alpha is not supported on plane %d", plane->id());
    681       ret = -EINVAL;
    682       break;
    683     }
    684 
    685     ret = drmModeAtomicAddProperty(pset, plane->id(),
    686                                    plane->crtc_property().id(), crtc->id()) < 0;
    687     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    688                                     plane->fb_property().id(), fb_id) < 0;
    689     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    690                                     plane->crtc_x_property().id(),
    691                                     display_frame.left) < 0;
    692     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    693                                     plane->crtc_y_property().id(),
    694                                     display_frame.top) < 0;
    695     ret |= drmModeAtomicAddProperty(
    696                pset, plane->id(), plane->crtc_w_property().id(),
    697                display_frame.right - display_frame.left) < 0;
    698     ret |= drmModeAtomicAddProperty(
    699                pset, plane->id(), plane->crtc_h_property().id(),
    700                display_frame.bottom - display_frame.top) < 0;
    701     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    702                                     plane->src_x_property().id(),
    703                                     (int)(source_crop.left) << 16) < 0;
    704     ret |= drmModeAtomicAddProperty(pset, plane->id(),
    705                                     plane->src_y_property().id(),
    706                                     (int)(source_crop.top) << 16) < 0;
    707     ret |= drmModeAtomicAddProperty(
    708                pset, plane->id(), plane->src_w_property().id(),
    709                (int)(source_crop.right - source_crop.left) << 16) < 0;
    710     ret |= drmModeAtomicAddProperty(
    711                pset, plane->id(), plane->src_h_property().id(),
    712                (int)(source_crop.bottom - source_crop.top) << 16) < 0;
    713     if (ret) {
    714       ALOGE("Failed to add plane %d to set", plane->id());
    715       break;
    716     }
    717 
    718     if (plane->rotation_property().id()) {
    719       ret = drmModeAtomicAddProperty(pset, plane->id(),
    720                                      plane->rotation_property().id(),
    721                                      rotation) < 0;
    722       if (ret) {
    723         ALOGE("Failed to add rotation property %d to plane %d",
    724               plane->rotation_property().id(), plane->id());
    725         break;
    726       }
    727     }
    728 
    729     if (plane->alpha_property().id()) {
    730       ret = drmModeAtomicAddProperty(pset, plane->id(),
    731                                      plane->alpha_property().id(),
    732                                      alpha) < 0;
    733       if (ret) {
    734         ALOGE("Failed to add alpha property %d to plane %d",
    735               plane->alpha_property().id(), plane->id());
    736         break;
    737       }
    738     }
    739   }
    740 
    741 out:
    742   if (!ret) {
    743     uint32_t flags = DRM_MODE_ATOMIC_ALLOW_MODESET;
    744     if (test_only)
    745       flags |= DRM_MODE_ATOMIC_TEST_ONLY;
    746 
    747     ret = drmModeAtomicCommit(drm_->fd(), pset, flags, drm_);
    748     if (ret) {
    749       if (test_only)
    750         ALOGI("Commit test pset failed ret=%d\n", ret);
    751       else
    752         ALOGE("Failed to commit pset ret=%d\n", ret);
    753       drmModeAtomicFree(pset);
    754       return ret;
    755     }
    756   }
    757   if (pset)
    758     drmModeAtomicFree(pset);
    759 
    760   if (!test_only && mode_.needs_modeset) {
    761     ret = drm_->DestroyPropertyBlob(mode_.old_blob_id);
    762     if (ret) {
    763       ALOGE("Failed to destroy old mode property blob %" PRIu32 "/%d",
    764             mode_.old_blob_id, ret);
    765       return ret;
    766     }
    767 
    768     /* TODO: Add dpms to the pset when the kernel supports it */
    769     ret = ApplyDpms(display_comp);
    770     if (ret) {
    771       ALOGE("Failed to apply DPMS after modeset %d\n", ret);
    772       return ret;
    773     }
    774 
    775     connector->set_active_mode(mode_.mode);
    776     mode_.old_blob_id = mode_.blob_id;
    777     mode_.blob_id = 0;
    778     mode_.needs_modeset = false;
    779   }
    780 
    781   return ret;
    782 }
    783 
    784 int DrmDisplayCompositor::ApplyDpms(DrmDisplayComposition *display_comp) {
    785   DrmConnector *conn = drm_->GetConnectorForDisplay(display_);
    786   if (!conn) {
    787     ALOGE("Failed to get DrmConnector for display %d", display_);
    788     return -ENODEV;
    789   }
    790 
    791   const DrmProperty &prop = conn->dpms_property();
    792   int ret = drmModeConnectorSetProperty(drm_->fd(), conn->id(), prop.id(),
    793                                         display_comp->dpms_mode());
    794   if (ret) {
    795     ALOGE("Failed to set DPMS property for connector %d", conn->id());
    796     return ret;
    797   }
    798   return 0;
    799 }
    800 
    801 std::tuple<int, uint32_t> DrmDisplayCompositor::CreateModeBlob(
    802     const DrmMode &mode) {
    803   struct drm_mode_modeinfo drm_mode;
    804   memset(&drm_mode, 0, sizeof(drm_mode));
    805   mode.ToDrmModeModeInfo(&drm_mode);
    806 
    807   uint32_t id = 0;
    808   int ret = drm_->CreatePropertyBlob(&drm_mode,
    809                                      sizeof(struct drm_mode_modeinfo), &id);
    810   if (ret) {
    811     ALOGE("Failed to create mode property blob %d", ret);
    812     return std::make_tuple(ret, 0);
    813   }
    814   ALOGE("Create blob_id %" PRIu32 "\n", id);
    815   return std::make_tuple(ret, id);
    816 }
    817 
    818 void DrmDisplayCompositor::ClearDisplay() {
    819   std::lock_guard<std::mutex> lk(mutex_);
    820   if (!active_composition_)
    821     return;
    822 
    823   if (DisablePlanes(active_composition_.get()))
    824     return;
    825 
    826   active_composition_->SignalCompositionDone();
    827 
    828   active_composition_.reset(NULL);
    829 }
    830 
    831 void DrmDisplayCompositor::ApplyFrame(
    832     std::unique_ptr<DrmDisplayComposition> composition, int status) {
    833   int ret = status;
    834 
    835   if (!ret)
    836     ret = CommitFrame(composition.get(), false);
    837 
    838   if (ret) {
    839     ALOGE("Composite failed for display %d", display_);
    840     // Disable the hw used by the last active composition. This allows us to
    841     // signal the release fences from that composition to avoid hanging.
    842     ClearDisplay();
    843     return;
    844   }
    845   ++dump_frames_composited_;
    846 
    847   if (active_composition_)
    848     active_composition_->SignalCompositionDone();
    849 
    850   std::lock_guard<std::mutex> lk(mutex_);
    851   active_composition_.swap(composition);
    852 }
    853 
    854 void DrmDisplayCompositor::ProcessWork(
    855     std::unique_ptr<DrmDisplayComposition> composition) {
    856   ATRACE_CALL();
    857 
    858   if (!pre_compositor_) {
    859     pre_compositor_.reset(new GLWorkerCompositor());
    860     int ret = pre_compositor_->Init();
    861     if (ret) {
    862       ALOGE("Failed to initialize OpenGL compositor %d", ret);
    863       return;
    864     }
    865   }
    866 
    867   int ret;
    868   switch (composition->type()) {
    869     case DRM_COMPOSITION_TYPE_FRAME:
    870       ret = PrepareFrame(composition.get());
    871       if (ret) {
    872         ALOGE("Failed to prepare frame for display %d", display_);
    873         return;
    874       }
    875       if (composition->geometry_changed()) {
    876         // Send the composition to the kernel to ensure we can commit it. This
    877         // is just a test, it won't actually commit the frame. If rejected,
    878         // squash the frame into one layer and use the squashed composition
    879         ret = CommitFrame(composition.get(), true);
    880         if (ret)
    881           ALOGI("Commit test failed, squashing frame for display %d", display_);
    882         use_hw_overlays_ = !ret;
    883       }
    884 
    885       // If use_hw_overlays_ is false, we can't use hardware to composite the
    886       // frame. So squash all layers into a single composition and queue that
    887       // instead.
    888       if (!use_hw_overlays_) {
    889         std::unique_ptr<DrmDisplayComposition> squashed = CreateComposition();
    890         ret = SquashFrame(composition.get(), squashed.get());
    891         if (!ret) {
    892           composition = std::move(squashed);
    893         } else {
    894           ALOGE("Failed to squash frame for display %d", display_);
    895           // Disable the hw used by the last active composition. This allows us
    896           // to signal the release fences from that composition to avoid
    897           // hanging.
    898           ClearDisplay();
    899           return;
    900         }
    901       }
    902       frame_worker_.QueueFrame(std::move(composition), ret);
    903       break;
    904     case DRM_COMPOSITION_TYPE_DPMS:
    905       ret = ApplyDpms(composition.get());
    906       if (ret)
    907         ALOGE("Failed to apply dpms for display %d", display_);
    908       break;
    909     case DRM_COMPOSITION_TYPE_MODESET:
    910       mode_.mode = composition->display_mode();
    911       if (mode_.blob_id)
    912         drm_->DestroyPropertyBlob(mode_.blob_id);
    913       std::tie(ret, mode_.blob_id) = CreateModeBlob(mode_.mode);
    914       if (ret) {
    915         ALOGE("Failed to create mode blob for display %d", display_);
    916         return;
    917       }
    918       mode_.needs_modeset = true;
    919       break;
    920     default:
    921       ALOGE("Unknown composition type %d", composition->type());
    922       break;
    923   }
    924 }
    925 
    926 int DrmDisplayCompositor::SquashAll() {
    927   std::unique_lock<std::mutex> lk(mutex_);
    928   int ret;
    929 
    930   if (!active_composition_)
    931     return 0;
    932 
    933   std::unique_ptr<DrmDisplayComposition> comp = CreateComposition();
    934   ret = SquashFrame(active_composition_.get(), comp.get());
    935 
    936   // ApplyFrame needs the lock
    937   lk.unlock();
    938 
    939   if (!ret)
    940     ApplyFrame(std::move(comp), 0);
    941 
    942   return ret;
    943 }
    944 
    945 // Returns:
    946 //   - 0 if src is successfully squashed into dst
    947 //   - -EALREADY if the src is already squashed
    948 //   - Appropriate error if the squash fails
    949 int DrmDisplayCompositor::SquashFrame(DrmDisplayComposition *src,
    950                                       DrmDisplayComposition *dst) {
    951   if (src->type() != DRM_COMPOSITION_TYPE_FRAME)
    952     return -ENOTSUP;
    953 
    954   std::vector<DrmCompositionPlane> &src_planes = src->composition_planes();
    955   std::vector<DrmHwcLayer> &src_layers = src->layers();
    956 
    957   // Make sure there is more than one layer to squash.
    958   size_t src_planes_with_layer = std::count_if(
    959       src_planes.begin(), src_planes.end(), [](DrmCompositionPlane &p) {
    960         return p.type() != DrmCompositionPlane::Type::kDisable;
    961       });
    962   if (src_planes_with_layer <= 1)
    963     return -EALREADY;
    964 
    965   int pre_comp_layer_index;
    966 
    967   int ret = dst->Init(drm_, src->crtc(), src->importer(), src->planner(),
    968                       src->frame_no());
    969   if (ret) {
    970     ALOGE("Failed to init squash all composition %d", ret);
    971     return ret;
    972   }
    973 
    974   DrmCompositionPlane squashed_comp(DrmCompositionPlane::Type::kPrecomp, NULL,
    975                                     src->crtc());
    976   std::vector<DrmHwcLayer> dst_layers;
    977   for (DrmCompositionPlane &comp_plane : src_planes) {
    978     // Composition planes without DRM planes should never happen
    979     if (comp_plane.plane() == NULL) {
    980       ALOGE("Skipping squash all because of NULL plane");
    981       ret = -EINVAL;
    982       goto move_layers_back;
    983     }
    984 
    985     if (comp_plane.plane()->type() == DRM_PLANE_TYPE_PRIMARY)
    986       squashed_comp.set_plane(comp_plane.plane());
    987     else
    988       dst->AddPlaneDisable(comp_plane.plane());
    989 
    990     if (comp_plane.type() == DrmCompositionPlane::Type::kDisable)
    991       continue;
    992 
    993     for (auto i : comp_plane.source_layers()) {
    994       DrmHwcLayer &layer = src_layers[i];
    995 
    996       // Squashing protected layers is impossible.
    997       if (layer.protected_usage()) {
    998         ret = -ENOTSUP;
    999         goto move_layers_back;
   1000       }
   1001 
   1002       // The OutputFds point to freed memory after hwc_set returns. They are
   1003       // returned to the default to prevent DrmDisplayComposition::Plan from
   1004       // filling the OutputFds.
   1005       layer.release_fence = OutputFd();
   1006       dst_layers.emplace_back(std::move(layer));
   1007       squashed_comp.source_layers().push_back(
   1008           squashed_comp.source_layers().size());
   1009     }
   1010   }
   1011 
   1012   if (squashed_comp.plane() == NULL) {
   1013     ALOGE("Primary plane not found for squash");
   1014     ret = -ENOTSUP;
   1015     goto move_layers_back;
   1016   }
   1017 
   1018   ret = dst->SetLayers(dst_layers.data(), dst_layers.size(), false);
   1019   if (ret) {
   1020     ALOGE("Failed to set layers for squash all composition %d", ret);
   1021     goto move_layers_back;
   1022   }
   1023 
   1024   ret = dst->AddPlaneComposition(std::move(squashed_comp));
   1025   if (ret) {
   1026     ALOGE("Failed to add squashed plane composition %d", ret);
   1027     goto move_layers_back;
   1028   }
   1029 
   1030   ret = dst->FinalizeComposition();
   1031   if (ret) {
   1032     ALOGE("Failed to plan for squash all composition %d", ret);
   1033     goto move_layers_back;
   1034   }
   1035 
   1036   ret = ApplyPreComposite(dst);
   1037   if (ret) {
   1038     ALOGE("Failed to pre-composite for squash all composition %d", ret);
   1039     goto move_layers_back;
   1040   }
   1041 
   1042   pre_comp_layer_index = dst->layers().size() - 1;
   1043   framebuffer_index_ = (framebuffer_index_ + 1) % DRM_DISPLAY_BUFFERS;
   1044 
   1045   for (DrmCompositionPlane &plane : dst->composition_planes()) {
   1046     if (plane.type() == DrmCompositionPlane::Type::kPrecomp) {
   1047       // Replace source_layers with the output of the precomposite
   1048       plane.source_layers().clear();
   1049       plane.source_layers().push_back(pre_comp_layer_index);
   1050       break;
   1051     }
   1052   }
   1053 
   1054   return 0;
   1055 
   1056 // TODO(zachr): think of a better way to transfer ownership back to the active
   1057 // composition.
   1058 move_layers_back:
   1059   for (size_t plane_index = 0;
   1060        plane_index < src_planes.size() && plane_index < dst_layers.size();) {
   1061     if (src_planes[plane_index].source_layers().empty()) {
   1062       plane_index++;
   1063       continue;
   1064     }
   1065     for (auto i : src_planes[plane_index].source_layers())
   1066       src_layers[i] = std::move(dst_layers[plane_index++]);
   1067   }
   1068 
   1069   return ret;
   1070 }
   1071 
   1072 void DrmDisplayCompositor::Dump(std::ostringstream *out) const {
   1073   std::lock_guard<std::mutex> lk(mutex_);
   1074   uint64_t num_frames = dump_frames_composited_;
   1075   dump_frames_composited_ = 0;
   1076 
   1077   struct timespec ts;
   1078   int ret = clock_gettime(CLOCK_MONOTONIC, &ts);
   1079   if (ret) {
   1080     return;
   1081   }
   1082 
   1083   uint64_t cur_ts = ts.tv_sec * 1000 * 1000 * 1000 + ts.tv_nsec;
   1084   uint64_t num_ms = (cur_ts - dump_last_timestamp_ns_) / (1000 * 1000);
   1085   float fps = num_ms ? (num_frames * 1000.0f) / (num_ms) : 0.0f;
   1086 
   1087   *out << "--DrmDisplayCompositor[" << display_
   1088        << "]: num_frames=" << num_frames << " num_ms=" << num_ms
   1089        << " fps=" << fps << "\n";
   1090 
   1091   dump_last_timestamp_ns_ = cur_ts;
   1092 
   1093   *out << "----Jank Stats: "
   1094        << " compositor_max_q_wait_us=" << max_duration_us
   1095        << " frameworker_max_q_wait_us=" << frame_worker_.max_duration_us
   1096        << "\n";
   1097 
   1098   max_duration_us = 0;
   1099   frame_worker_.max_duration_us = 0;
   1100 
   1101   if (active_composition_)
   1102     active_composition_->Dump(out);
   1103 
   1104   squash_state_.Dump(out);
   1105 }
   1106 
   1107 void DrmDisplayCompositor::ProcessIdle() {
   1108   SquashAll();
   1109 }
   1110 }
   1111