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96 lines
3.1 KiB
96 lines
3.1 KiB
/*
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* Copyright (c) 2017, 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 __DRM_MASTER_H__
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#define __DRM_MASTER_H__
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#include <mutex>
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#include "drm_logger.h"
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namespace drm_utils {
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struct DRMBuffer {
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int fd = -1;
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uint32_t width = 0;
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uint32_t height = 0;
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uint32_t drm_format = 0;
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uint64_t drm_format_modifier = 0;
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uint32_t stride[4] = {};
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uint32_t offset[4] = {};
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uint32_t num_planes = 1;
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};
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class DRMMaster {
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public:
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~DRMMaster();
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/* Converts from ION fd --> Prime Handle --> FB_ID.
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* Input:
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* drm_buffer: A DRMBuffer obj that packages description of buffer
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* Output:
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* fb_id: Pointer to store DRM framebuffer id into
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* Returns:
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* ioctl error code
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*/
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int CreateFbId(const DRMBuffer &drm_buffer, uint32_t *gem_handle, uint32_t *fb_id);
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/* Removes the fb_id from DRM
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* Input:
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* fb_id: DRM FB to be removed
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* Returns:
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* ioctl error code
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*/
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int RemoveFbId(uint32_t gem_handle, uint32_t fb_id);
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/* Poplulates master DRM fd
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* Input:
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* fd: Pointer to store master fd into
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*/
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void GetHandle(int *fd) { *fd = dev_fd_; }
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/* Creates an instance of DRMMaster if it doesn't exist and initializes it. Threadsafe.
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* Input:
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* master: Pointer to store a pointer to the instance
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* Returns:
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* -ENODEV if device cannot be opened or initilization fails
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*/
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static int GetInstance(DRMMaster **master);
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static void DestroyInstance();
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private:
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DRMMaster() {}
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int Init();
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int dev_fd_ = -1; // Master fd for DRM
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static DRMMaster *s_instance; // Singleton instance
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static std::mutex s_lock;
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};
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} // namespace drm_utils
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#endif // __DRM_MASTER_H__
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