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/*
* 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 <mutex>
#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 *fb_id);
/* Removes the fb_id from DRM
* Input:
* fb_id: DRM FB to be removed
* Returns:
* ioctl error code
*/
int RemoveFbId(uint32_t fb_id);
/* Poplulates master DRM fd
* Input:
* fd: Pointer to store master fd into
*/
void GetHandle(int *fd) { *fd = dev_fd_; }
/* Returns true if the ref counted version of rmfb is being used */
bool IsRmFbRefCounted();
/* 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__
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