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/*
* 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 <hardware/hardware.h>
#include <hardware/hwcomposer.h>
#include <pthread.h>
#include <memory>
#include <sstream>
#include <tuple>
#include "DrmDisplayComposition.h"
#include "DrmFramebuffer.h"
#include "Planner.h"
#include "drm/ResourceManager.h"
#include "drm/VSyncWorker.h"
#include "drmhwcomposer.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
// If a scene is still for this number of vblanks flatten it to reduce power
// consumption.
#define FLATTEN_COUNTDOWN_INIT 60
namespace android {
enum class FlatteningState {
kNone,
kNotNeeded,
kClientRequested,
kClientDone,
kSerial,
kConcurrent
};
std::ostream &operator<<(std::ostream &str, FlatteningState state);
class DrmDisplayCompositor {
public:
DrmDisplayCompositor();
~DrmDisplayCompositor();
int Init(ResourceManager *resource_manager, int display);
hwc2_callback_data_t refresh_callback_data_ = NULL;
HWC2_PFN_REFRESH refresh_callback_hook_ = NULL;
std::mutex refresh_callback_lock;
void SetRefreshCallback(hwc2_callback_data_t data,
hwc2_function_pointer_t hook) {
const std::lock_guard<std::mutex> lock(refresh_callback_lock);
refresh_callback_data_ = data;
refresh_callback_hook_ = reinterpret_cast<HWC2_PFN_REFRESH>(hook);
}
std::unique_ptr<DrmDisplayComposition> CreateComposition() const;
std::unique_ptr<DrmDisplayComposition> CreateInitializedComposition() const;
int ApplyComposition(std::unique_ptr<DrmDisplayComposition> composition);
int TestComposition(DrmDisplayComposition *composition);
int Composite();
void Dump(std::ostringstream *out) const;
void Vsync(int display, int64_t timestamp);
void ClearDisplay();
int TakeOutFence() {
if (!active_composition_)
return -1;
return active_composition_->take_out_fence();
}
FlatteningState GetFlatteningState() const;
uint32_t GetFlattenedFramesCount() const;
bool ShouldFlattenOnClient() const;
std::tuple<uint32_t, uint32_t, int> GetActiveModeResolution();
private:
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 CommitFrame(DrmDisplayComposition *display_comp, bool test_only,
DrmConnector *writeback_conn = NULL,
DrmHwcBuffer *writeback_buffer = NULL);
int SetupWritebackCommit(drmModeAtomicReqPtr pset, uint32_t crtc_id,
DrmConnector *writeback_conn,
DrmHwcBuffer *writeback_buffer);
int ApplyDpms(DrmDisplayComposition *display_comp);
int DisablePlanes(DrmDisplayComposition *display_comp);
void ApplyFrame(std::unique_ptr<DrmDisplayComposition> composition,
int status, bool writeback = false);
void SetFlattening(FlatteningState new_state);
bool IsFlatteningNeeded() const;
int FlattenActiveComposition();
int FlattenOnClient();
int FlattenSerial(DrmConnector *writeback_conn);
int FlattenConcurrent(DrmConnector *writeback_conn);
int FlattenOnDisplay(std::unique_ptr<DrmDisplayComposition> &src,
DrmConnector *writeback_conn, DrmMode &src_mode,
DrmHwcLayer *writeback_layer);
bool CountdownExpired() const;
std::tuple<int, uint32_t> CreateModeBlob(const DrmMode &mode);
ResourceManager *resource_manager_;
int display_;
std::unique_ptr<DrmDisplayComposition> active_composition_;
bool initialized_;
bool active_;
bool use_hw_overlays_;
ModeState mode_;
int framebuffer_index_{};
DrmFramebuffer framebuffers_[DRM_DISPLAY_BUFFERS];
// mutable since we need to acquire in Dump()
mutable pthread_mutex_t lock_{};
// 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_;
VSyncWorker vsync_worker_;
int64_t flatten_countdown_;
std::unique_ptr<Planner> planner_;
int writeback_fence_;
FlatteningState flattening_state_;
uint32_t frames_flattened_;
std::function<void(int)> refresh_display_cb_;
};
} // namespace android
#endif // ANDROID_DRM_DISPLAY_COMPOSITOR_H_
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