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121 lines
4.2 KiB
121 lines
4.2 KiB
4 months ago
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/*
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* Copyright (c) 2013 The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef OVERLAY_WRITEBACK_H
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#define OVERLAY_WRITEBACK_H
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#include "overlayMem.h"
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namespace overlay {
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class WritebackMgr;
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class WritebackMem {
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public:
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explicit WritebackMem() : mCurrOffsetIndex(0) {
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memset(&mOffsets, 0, sizeof(mOffsets));
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}
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~WritebackMem() { dealloc(); }
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bool manageMem(uint32_t size, bool isSecure);
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void useNextBuffer() {
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mCurrOffsetIndex = (mCurrOffsetIndex + 1) % NUM_BUFS;
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}
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uint32_t getOffset() const { return mOffsets[mCurrOffsetIndex]; }
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int getDstFd() const { return mBuf.getFD(); }
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private:
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bool alloc(uint32_t size, bool isSecure);
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bool dealloc();
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enum { NUM_BUFS = 2 };
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OvMem mBuf;
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uint32_t mOffsets[NUM_BUFS];
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uint32_t mCurrOffsetIndex;
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};
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//Abstracts the WB2 interface of MDP
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//Has modes to either manage memory or work with memory allocated elsewhere
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class Writeback {
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public:
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~Writeback();
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bool configureDpyInfo(int xres, int yres);
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bool configureMemory(uint32_t size);
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/* Blocking write. (queue, commit, dequeue)
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* This class will do writeback memory management.
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* This class will call display-commit on writeback mixer.
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*/
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bool writeSync();
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/* Blocking write. (queue, commit, dequeue)
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* Client must do writeback memory management.
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* Client must not call display-commit on writeback mixer.
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*/
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bool writeSync(int opFd, uint32_t opOffset);
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/* Async queue. (Does not write)
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* Client must do writeback memory management.
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* Client must call display-commit on their own.
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* Client must use sync mechanism e.g sync pt.
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*/
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bool queueBuffer(int opFd, uint32_t opOffset);
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uint32_t getOffset() const { return mWbMem.getOffset(); }
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int getDstFd() const { return mWbMem.getDstFd(); }
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/* Subject to GC if writeback isnt used for a drawing round.
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* Get always if caching the value.
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*/
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int getFbFd() const { return mFd.getFD(); }
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int getOutputFormat();
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bool setOutputFormat(int mdpFormat);
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bool setSecure(bool isSecure);
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static Writeback* getInstance();
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static void configBegin() { sUsed = false; }
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static void configDone();
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static void clear();
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//Will take a dump of data structure only if there is an instance existing
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//Returns true if dump is added to the input buffer, false otherwise
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static bool getDump(char *buf, size_t len);
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private:
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explicit Writeback();
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bool startSession();
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bool stopSession();
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//Actually block_until_write_done for the usage here.
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bool dequeueBuffer();
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OvFD mFd;
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WritebackMem mWbMem;
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struct msmfb_data mFbData;
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int mXres;
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int mYres;
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int mOpFmt;
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bool mSecure;
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static bool sUsed;
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static Writeback *sWb;
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};
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}
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#endif
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