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95 lines
3.1 KiB
95 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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