include/media/exynos_repeater.h

   1 /*
   2  * Copyright (c) 2017 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com
   4  *
   5  * Header file for Exynos Repeater driver
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef _EXYNOS_REPEATER_H_
  13 #define _EXYNOS_REPEATER_H_
  14
  15 #include <linux/dma-buf.h>
  16
  17 #define MAX_SHARED_BUF_NUM      3
  18
  19 /**
  20  * struct shared_buffer_info
  21  *
  22  * @pixel_format        : pixel_format of bufs
  23  * @width               : width of bufs
  24  * @height              : height of bufs
  25  * @buffer_count        : valid buffer count of bufs
  26  * @bufs                : pointer of struct dma_buf for buffer sharing.
  27  */
  28 struct shared_buffer_info {
  29         int pixel_format;
  30         int width;
  31         int height;
  32         int buffer_count;
  33         struct dma_buf *bufs[MAX_SHARED_BUF_NUM];
  34 };
  35
  36 /**
  37  * hwfc_request_buffer - Get infomation of shared buffer
  38  * @info: information of shared buffer
  39  * owner: G2D is 0, MFC is 1
  40  *
  41  * G2D/MFC calls it to get shared buffer information.
  42  * Repeater increments reference count on the dma-buf.
  43  * G2D/MFC should decrement reference count on the dma-buf.
  44  * If repeater has valid buffer, it returns a zero.
  45  * If repeater don't have valid buffer, it returns a errno.
  46  *
  47  */
  48 #ifdef CONFIG_VIDEO_EXYNOS_REPEATER
  49 int hwfc_request_buffer(struct shared_buffer_info *info, int owner);
  50 #else
  51 static inline int hwfc_request_buffer(struct shared_buffer_info *info, int owner)
  52 {
  53         return -1;
  54 }
  55 #endif
  56
  57 /**
  58  * hwfc_get_valid_buffer - Get shared buf idx for capture output
  59  * @buf_idx: shared buf idx for capture output
  60  *
  61  * G2D call it to get shared buffer index for capture output.
  62  * If repeater has valid buffer for capture output, it returns a zero.
  63  * If repeater don't have valid buffer for capture output, it returns a errno.
  64  *
  65  */
  66 #ifdef CONFIG_VIDEO_EXYNOS_REPEATER
  67 int hwfc_get_valid_buffer(int *buf_idx);
  68 #else
  69 static inline int hwfc_get_valid_buffer(int *buf_idx)
  70 {
  71         return -1;
  72 }
  73 #endif
  74
  75 /**
  76  * hwfc_set_valid_buffer - Set shared buf idx & job id for capture output
  77  * @buf_idx     : shared buf idx for capture output
  78  * @capture_idx : hwfc capture idx
  79  *
  80  * G2D calls it after G2D H/W starts capture.
  81  *
  82  */
  83 #ifdef CONFIG_VIDEO_EXYNOS_REPEATER
  84 int hwfc_set_valid_buffer(int buf_idx, int capture_idx);
  85 #else
  86 static inline int hwfc_set_valid_buffer(int buf_idx, int capture_idx)
  87 {
  88         return -1;
  89 }
  90 #endif
  91
  92 /**
  93  * hwfc_encoding_done - Set ret about encoding
  94  * @encoding_ret : ret about encoding
  95  *
  96  * MFC calls it when encoding is done.
  97  *
  98  */
  99 #ifdef CONFIG_VIDEO_EXYNOS_REPEATER
 100 int hwfc_encoding_done(int encoding_ret);
 101 #else
 102 static inline int hwfc_encoding_done(int encoding_ret)
 103 {
 104         return -1;
 105 }
 106 #endif
 107
 108 #endif /* _EXYNOS_REPEATER_H_ */