1 files changed, 95 insertions, 0 deletions
diff --git a/msm8909/libdrmutils/drm_master.h b/msm8909/libdrmutils/drm_master.h
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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_; }
+
+  /* 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__