/* * Copyright (c) 2017, The Linux Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * Neither the name of The Linux Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef __DRM_MASTER_H__ #define __DRM_MASTER_H__ #include #include "drm_logger.h" namespace drm_utils { struct DRMBuffer { int fd = -1; uint32_t width = 0; uint32_t height = 0; uint32_t drm_format = 0; uint64_t drm_format_modifier = 0; uint32_t stride[4] = {}; uint32_t offset[4] = {}; uint32_t num_planes = 1; }; class DRMMaster { public: ~DRMMaster(); /* Converts from ION fd --> Prime Handle --> FB_ID. * Input: * drm_buffer: A DRMBuffer obj that packages description of buffer * Output: * fb_id: Pointer to store DRM framebuffer id into * Returns: * ioctl error code */ int CreateFbId(const DRMBuffer &drm_buffer, uint32_t *gem_handle, uint32_t *fb_id); /* Removes the fb_id from DRM * Input: * fb_id: DRM FB to be removed * Returns: * ioctl error code */ int RemoveFbId(uint32_t gem_handle, uint32_t fb_id); /* Poplulates master DRM fd * Input: * fd: Pointer to store master fd into */ void GetHandle(int *fd) { *fd = dev_fd_; } /* Creates an instance of DRMMaster if it doesn't exist and initializes it. Threadsafe. * Input: * master: Pointer to store a pointer to the instance * Returns: * -ENODEV if device cannot be opened or initilization fails */ static int GetInstance(DRMMaster **master); static void DestroyInstance(); private: DRMMaster() {} int Init(); int dev_fd_ = -1; // Master fd for DRM static DRMMaster *s_instance; // Singleton instance static std::mutex s_lock; }; } // namespace drm_utils #endif // __DRM_MASTER_H__