| Saurabh Shah | 7d476ed | 2016-06-27 16:40:58 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are |
| 6 | * met: |
| 7 | * * Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * * Redistributions in binary form must reproduce the above |
| 10 | * copyright notice, this list of conditions and the following |
| 11 | * disclaimer in the documentation and/or other materials provided |
| 12 | * with the distribution. |
| 13 | * * Neither the name of The Linux Foundation nor the names of its |
| 14 | * contributors may be used to endorse or promote products derived |
| 15 | * from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 21 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 22 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 24 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 26 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 27 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #ifndef __DRM_MASTER_H__ |
| 31 | #define __DRM_MASTER_H__ |
| 32 | |
| 33 | #include <mutex> |
| 34 | |
| 35 | #include "drm_logger.h" |
| 36 | |
| 37 | namespace drm_utils { |
| 38 | |
| 39 | struct DRMBuffer { |
| 40 | int fd = -1; |
| 41 | uint32_t width = 0; |
| 42 | uint32_t height = 0; |
| 43 | uint32_t drm_format = 0; |
| 44 | uint64_t drm_format_modifier = 0; |
| 45 | uint32_t stride[4] = {}; |
| 46 | uint32_t offset[4] = {}; |
| 47 | uint32_t num_planes = 1; |
| 48 | }; |
| 49 | |
| 50 | class DRMMaster { |
| 51 | public: |
| 52 | ~DRMMaster(); |
| 53 | /* Converts from ION fd --> Prime Handle --> FB_ID. |
| 54 | * Input: |
| 55 | * drm_buffer: A DRMBuffer obj that packages description of buffer |
| 56 | * Output: |
| 57 | * fb_id: Pointer to store DRM framebuffer id into |
| 58 | * Returns: |
| 59 | * ioctl error code |
| 60 | */ |
| 61 | int CreateFbId(const DRMBuffer &drm_buffer, uint32_t *gem_handle, uint32_t *fb_id); |
| 62 | /* Removes the fb_id from DRM |
| 63 | * Input: |
| 64 | * fb_id: DRM FB to be removed |
| 65 | * Returns: |
| 66 | * ioctl error code |
| 67 | */ |
| 68 | int RemoveFbId(uint32_t gem_handle, uint32_t fb_id); |
| 69 | /* Poplulates master DRM fd |
| 70 | * Input: |
| 71 | * fd: Pointer to store master fd into |
| 72 | */ |
| 73 | void GetHandle(int *fd) { *fd = dev_fd_; } |
| 74 | |
| 75 | /* Creates an instance of DRMMaster if it doesn't exist and initializes it. Threadsafe. |
| 76 | * Input: |
| 77 | * master: Pointer to store a pointer to the instance |
| 78 | * Returns: |
| 79 | * -ENODEV if device cannot be opened or initilization fails |
| 80 | */ |
| 81 | static int GetInstance(DRMMaster **master); |
| 82 | |
| 83 | private: |
| 84 | DRMMaster() {} |
| 85 | int Init(); |
| 86 | |
| 87 | int dev_fd_ = -1; // Master fd for DRM |
| 88 | static DRMMaster *s_instance; // Singleton instance |
| 89 | static std::mutex s_lock; |
| 90 | }; |
| 91 | |
| 92 | } // namespace drm_utils |
| 93 | |
| 94 | #endif // __DRM_MASTER_H__ |