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/*
* Copyright 2022 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_HWC_DRMPRESENTER_H
#define ANDROID_HWC_DRMPRESENTER_H
#include <android-base/unique_fd.h>
#include <cutils/native_handle.h>
#include <utils/Thread.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <map>
#include <memory>
#include <tuple>
#include <vector>
#include "Common.h"
#include "LruCache.h"
#include "android/base/synchronization/AndroidLock.h"
namespace aidl::android::hardware::graphics::composer3::impl {
class DrmBuffer;
class DrmPresenter;
// A RAII object that will clear a drm framebuffer upon destruction.
class DrmBuffer {
public:
~DrmBuffer();
DrmBuffer(const DrmBuffer&) = delete;
DrmBuffer& operator=(const DrmBuffer&) = delete;
DrmBuffer(DrmBuffer&&) = delete;
DrmBuffer& operator=(DrmBuffer&&) = delete;
private:
friend class DrmPresenter;
DrmBuffer(DrmPresenter& drmPresenter);
DrmPresenter& mDrmPresenter;
uint32_t mWidth = 0;
uint32_t mHeight = 0;
uint32_t mDrmFormat = 0;
uint32_t mPlaneFds[4] = {0, 0, 0, 0};
uint32_t mPlaneHandles[4] = {0, 0, 0, 0};
uint32_t mPlanePitches[4] = {0, 0, 0, 0};
uint32_t mPlaneOffsets[4] = {0, 0, 0, 0};
std::optional<uint32_t> mDrmFramebuffer;
};
class DrmPresenter {
public:
DrmPresenter() = default;
~DrmPresenter();
DrmPresenter(const DrmPresenter&) = delete;
DrmPresenter& operator=(const DrmPresenter&) = delete;
DrmPresenter(DrmPresenter&&) = delete;
DrmPresenter& operator=(DrmPresenter&&) = delete;
HWC3::Error init();
struct DisplayConfig {
uint32_t id;
uint32_t width;
uint32_t height;
uint32_t dpiX;
uint32_t dpiY;
uint32_t refreshRateHz;
};
HWC3::Error getDisplayConfigs(std::vector<DisplayConfig>* configs) const;
using HotplugCallback = std::function<void(bool /*connected*/, //
uint32_t /*id*/, //
uint32_t /*width*/, //
uint32_t /*height*/, //
uint32_t /*dpiX*/, //
uint32_t /*dpiY*/, //
uint32_t /*refreshRate*/)>;
HWC3::Error registerOnHotplugCallback(const HotplugCallback& cb);
HWC3::Error unregisterOnHotplugCallback();
uint32_t refreshRate() const { return mConnectors[0].mRefreshRateAsInteger; }
std::tuple<HWC3::Error, std::shared_ptr<DrmBuffer>> create(
const native_handle_t* handle);
std::tuple<HWC3::Error, ::android::base::unique_fd> flushToDisplay(
int display, const DrmBuffer& buffer,
::android::base::borrowed_fd inWaitSyncFd);
std::optional<std::vector<uint8_t>> getEdid(uint32_t id);
private:
// TODO: make this cache per display when enabling hotplug support.
using DrmPrimeBufferHandle = uint32_t;
using DrmBufferCache = LruCache<DrmPrimeBufferHandle, std::shared_ptr<DrmBuffer>>;
std::unique_ptr<DrmBufferCache> mBufferCache;
// Grant visibility to destroyDrmFramebuffer to DrmBuffer.
friend class DrmBuffer;
HWC3::Error destroyDrmFramebuffer(DrmBuffer* buffer);
// Grant visibility for handleHotplug to DrmEventListener.
bool handleHotplug();
bool initDrmElementsLocked();
void resetDrmElementsLocked();
// Drm device.
::android::base::unique_fd mFd;
std::optional<HotplugCallback> mHotplugCallback;
// Protects access to the below drm structs.
mutable ::android::base::guest::ReadWriteLock mStateMutex;
struct DrmPlane {
uint32_t mId = -1;
uint32_t mCrtcPropertyId = -1;
uint32_t mInFenceFdPropertyId = -1;
uint32_t mFbPropertyId = -1;
uint32_t mCrtcXPropertyId = -1;
uint32_t mCrtcYPropertyId = -1;
uint32_t mCrtcWPropertyId = -1;
uint32_t mCrtcHPropertyId = -1;
uint32_t mSrcXPropertyId = -1;
uint32_t mSrcYPropertyId = -1;
uint32_t mSrcWPropertyId = -1;
uint32_t mSrcHPropertyId = -1;
uint32_t mTypePropertyId = -1;
uint64_t mType = -1;
};
std::map<uint32_t, DrmPlane> mPlanes;
struct DrmCrtc {
uint32_t mId = -1;
uint32_t mActivePropertyId = -1;
uint32_t mModePropertyId = -1;
uint32_t mOutFencePtrPropertyId = -1;
uint32_t mPlaneId = -1;
bool mDidSetCrtc = false;
};
std::vector<DrmCrtc> mCrtcs;
struct DrmConnector {
uint32_t mId = -1;
uint32_t mCrtcPropertyId = -1;
drmModeModeInfo mMode;
int32_t dpiX;
int32_t dpiY;
drmModeConnection connection;
uint32_t mModeBlobId = 0;
float mRefreshRateAsFloat;
uint32_t mRefreshRateAsInteger;
uint64_t mEdidBlobId = -1;
};
std::vector<DrmConnector> mConnectors;
class DrmEventListener : public ::android::Thread {
public:
DrmEventListener(DrmPresenter& presenter);
virtual ~DrmEventListener();
bool init();
private:
bool threadLoop() final;
void eventThreadLoop();
void processHotplug(uint64_t timestamp);
DrmPresenter& mPresenter;
::android::base::unique_fd mEventFd;
int mMaxFd;
fd_set mMonitoredFds;
};
::android::sp<DrmEventListener> mDrmEventListener;
};
} // namespace aidl::android::hardware::graphics::composer3::impl
#endif
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