| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_DRM_DISPLAY_COMPOSITOR_H_ |
| #define ANDROID_DRM_DISPLAY_COMPOSITOR_H_ |
| |
| #include "drmcomposition.h" |
| #include "drmframebuffer.h" |
| #include "drmhwcomposer.h" |
| #include "queue_worker.h" |
| #include "separate_rects.h" |
| |
| #include <chrono> |
| #include <memory> |
| #include <queue> |
| #include <sstream> |
| #include <tuple> |
| |
| #include <hardware/hardware.h> |
| #include <hardware/hwcomposer.h> |
| |
| // One for the front, one for the back, and one for cases where we need to |
| // squash a frame that the hw can't display with hw overlays. |
| #define DRM_DISPLAY_BUFFERS 3 |
| |
| namespace android { |
| |
| class GLWorkerCompositor; |
| |
| class SquashState { |
| public: |
| static const unsigned kHistoryLength = 6; // TODO: make this number not magic |
| static const unsigned kMaxLayers = 64; |
| |
| struct Region { |
| DrmHwcRect<int> rect; |
| std::bitset<kMaxLayers> layer_refs; |
| std::bitset<kHistoryLength> change_history; |
| bool squashed = false; |
| }; |
| |
| bool is_stable(int region_index) const { |
| return valid_history_ >= kHistoryLength && |
| regions_[region_index].change_history.none(); |
| } |
| |
| const std::vector<Region> ®ions() const { |
| return regions_; |
| } |
| |
| void Init(DrmHwcLayer *layers, size_t num_layers); |
| void GenerateHistory(DrmHwcLayer *layers, size_t num_layers, |
| std::vector<bool> &changed_regions) const; |
| void StableRegionsWithMarginalHistory( |
| const std::vector<bool> &changed_regions, |
| std::vector<bool> &stable_regions) const; |
| void RecordHistory(DrmHwcLayer *layers, size_t num_layers, |
| const std::vector<bool> &changed_regions); |
| bool RecordAndCompareSquashed(const std::vector<bool> &squashed_regions); |
| |
| void Dump(std::ostringstream *out) const; |
| |
| private: |
| size_t generation_number_ = 0; |
| unsigned valid_history_ = 0; |
| std::vector<buffer_handle_t> last_handles_; |
| |
| std::vector<Region> regions_; |
| }; |
| |
| class DrmDisplayCompositor : public QueueWorker<DrmDisplayComposition> { |
| public: |
| DrmDisplayCompositor(); |
| ~DrmDisplayCompositor(); |
| |
| int Init(DrmResources *drm, int display); |
| |
| std::unique_ptr<DrmDisplayComposition> CreateComposition() const; |
| int QueueComposition(std::unique_ptr<DrmDisplayComposition> composition); |
| void ProcessWork(std::unique_ptr<DrmDisplayComposition> composition); |
| void ProcessIdle(); |
| int SquashAll(); |
| void Dump(std::ostringstream *out) const; |
| |
| std::tuple<uint32_t, uint32_t, int> GetActiveModeResolution(); |
| |
| SquashState *squash_state() { |
| return &squash_state_; |
| } |
| |
| private: |
| struct FrameState { |
| FrameState(std::unique_ptr<DrmDisplayComposition> composition, int status) |
| : composition(std::move(composition)), status(status) { |
| } |
| |
| std::unique_ptr<DrmDisplayComposition> composition; |
| int status = 0; |
| }; |
| |
| class FrameWorker : public QueueWorker<FrameState> { |
| public: |
| FrameWorker(DrmDisplayCompositor *compositor); |
| |
| int Init(); |
| void QueueFrame(std::unique_ptr<DrmDisplayComposition> composition, |
| int status); |
| |
| mutable uint64_t max_duration_us; |
| |
| protected: |
| void ProcessWork(std::unique_ptr<FrameState> frame); |
| |
| private: |
| DrmDisplayCompositor *compositor_; |
| }; |
| |
| struct ModeState { |
| bool needs_modeset = false; |
| DrmMode mode; |
| uint32_t blob_id = 0; |
| uint32_t old_blob_id = 0; |
| }; |
| |
| DrmDisplayCompositor(const DrmDisplayCompositor &) = delete; |
| |
| // We'll wait for acquire fences to fire for kAcquireWaitTimeoutMs, |
| // kAcquireWaitTries times, logging a warning in between. |
| static const int kAcquireWaitTries = 5; |
| static const int kAcquireWaitTimeoutMs = 100; |
| |
| int PrepareFramebuffer(DrmFramebuffer &fb, |
| DrmDisplayComposition *display_comp); |
| int ApplySquash(DrmDisplayComposition *display_comp); |
| int ApplyPreComposite(DrmDisplayComposition *display_comp); |
| int PrepareFrame(DrmDisplayComposition *display_comp); |
| int CommitFrame(DrmDisplayComposition *display_comp, bool test_only); |
| int SquashFrame(DrmDisplayComposition *src, DrmDisplayComposition *dst); |
| int ApplyDpms(DrmDisplayComposition *display_comp); |
| int DisablePlanes(DrmDisplayComposition *display_comp); |
| |
| void ClearDisplay(); |
| void ApplyFrame(std::unique_ptr<DrmDisplayComposition> composition, |
| int status); |
| |
| std::tuple<int, uint32_t> CreateModeBlob(const DrmMode &mode); |
| |
| DrmResources *drm_; |
| int display_; |
| |
| FrameWorker frame_worker_; |
| |
| std::unique_ptr<DrmDisplayComposition> active_composition_; |
| |
| bool active_; |
| bool use_hw_overlays_; |
| |
| ModeState mode_; |
| |
| int framebuffer_index_; |
| DrmFramebuffer framebuffers_[DRM_DISPLAY_BUFFERS]; |
| std::unique_ptr<GLWorkerCompositor> pre_compositor_; |
| |
| SquashState squash_state_; |
| int squash_framebuffer_index_; |
| DrmFramebuffer squash_framebuffers_[2]; |
| |
| // mutable since we need to acquire in HaveQueuedComposites |
| mutable std::mutex mutex_; |
| |
| // State tracking progress since our last Dump(). These are mutable since |
| // we need to reset them on every Dump() call. |
| mutable uint64_t dump_frames_composited_; |
| mutable uint64_t dump_last_timestamp_ns_; |
| mutable uint64_t max_duration_us; |
| }; |
| } |
| |
| #endif // ANDROID_DRM_DISPLAY_COMPOSITOR_H_ |