drivers/media/video/soc_mediabus.c

   1 /*
   2  * soc-camera media bus helper routines
   3  *
   4  * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13
  14 #include <media/v4l2-device.h>
  15 #include <media/v4l2-mediabus.h>
  16 #include <media/soc_mediabus.h>
  17
  18 #define MBUS_IDX(f) (V4L2_MBUS_FMT_ ## f - V4L2_MBUS_FMT_FIXED - 1)
  19
  20 static const struct soc_mbus_pixelfmt mbus_fmt[] = {
  21         [MBUS_IDX(YUYV8_2X8_LE)] = {
  22                 .fourcc                 = V4L2_PIX_FMT_YUYV,
  23                 .name                   = "YUYV",
  24                 .bits_per_sample        = 8,
  25                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  26                 .order                  = SOC_MBUS_ORDER_LE,
  27         }, [MBUS_IDX(YVYU8_2X8_LE)] = {
  28                 .fourcc                 = V4L2_PIX_FMT_YVYU,
  29                 .name                   = "YVYU",
  30                 .bits_per_sample        = 8,
  31                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  32                 .order                  = SOC_MBUS_ORDER_LE,
  33         }, [MBUS_IDX(YUYV8_2X8_BE)] = {
  34                 .fourcc                 = V4L2_PIX_FMT_UYVY,
  35                 .name                   = "UYVY",
  36                 .bits_per_sample        = 8,
  37                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  38                 .order                  = SOC_MBUS_ORDER_LE,
  39         }, [MBUS_IDX(YVYU8_2X8_BE)] = {
  40                 .fourcc                 = V4L2_PIX_FMT_VYUY,
  41                 .name                   = "VYUY",
  42                 .bits_per_sample        = 8,
  43                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  44                 .order                  = SOC_MBUS_ORDER_LE,
  45         }, [MBUS_IDX(RGB555_2X8_PADHI_LE)] = {
  46                 .fourcc                 = V4L2_PIX_FMT_RGB555,
  47                 .name                   = "RGB555",
  48                 .bits_per_sample        = 8,
  49                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  50                 .order                  = SOC_MBUS_ORDER_LE,
  51         }, [MBUS_IDX(RGB555_2X8_PADHI_BE)] = {
  52                 .fourcc                 = V4L2_PIX_FMT_RGB555X,
  53                 .name                   = "RGB555X",
  54                 .bits_per_sample        = 8,
  55                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  56                 .order                  = SOC_MBUS_ORDER_LE,
  57         }, [MBUS_IDX(RGB565_2X8_LE)] = {
  58                 .fourcc                 = V4L2_PIX_FMT_RGB565,
  59                 .name                   = "RGB565",
  60                 .bits_per_sample        = 8,
  61                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  62                 .order                  = SOC_MBUS_ORDER_LE,
  63         }, [MBUS_IDX(RGB565_2X8_BE)] = {
  64                 .fourcc                 = V4L2_PIX_FMT_RGB565X,
  65                 .name                   = "RGB565X",
  66                 .bits_per_sample        = 8,
  67                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  68                 .order                  = SOC_MBUS_ORDER_LE,
  69         }, [MBUS_IDX(SBGGR8_1X8)] = {
  70                 .fourcc                 = V4L2_PIX_FMT_SBGGR8,
  71                 .name                   = "Bayer 8 BGGR",
  72                 .bits_per_sample        = 8,
  73                 .packing                = SOC_MBUS_PACKING_NONE,
  74                 .order                  = SOC_MBUS_ORDER_LE,
  75         }, [MBUS_IDX(SBGGR10_1X10)] = {
  76                 .fourcc                 = V4L2_PIX_FMT_SBGGR10,
  77                 .name                   = "Bayer 10 BGGR",
  78                 .bits_per_sample        = 10,
  79                 .packing                = SOC_MBUS_PACKING_EXTEND16,
  80                 .order                  = SOC_MBUS_ORDER_LE,
  81         }, [MBUS_IDX(GREY8_1X8)] = {
  82                 .fourcc                 = V4L2_PIX_FMT_GREY,
  83                 .name                   = "Grey",
  84                 .bits_per_sample        = 8,
  85                 .packing                = SOC_MBUS_PACKING_NONE,
  86                 .order                  = SOC_MBUS_ORDER_LE,
  87         }, [MBUS_IDX(Y10_1X10)] = {
  88                 .fourcc                 = V4L2_PIX_FMT_Y10,
  89                 .name                   = "Grey 10bit",
  90                 .bits_per_sample        = 10,
  91                 .packing                = SOC_MBUS_PACKING_EXTEND16,
  92                 .order                  = SOC_MBUS_ORDER_LE,
  93         }, [MBUS_IDX(SBGGR10_2X8_PADHI_LE)] = {
  94                 .fourcc                 = V4L2_PIX_FMT_SBGGR10,
  95                 .name                   = "Bayer 10 BGGR",
  96                 .bits_per_sample        = 8,
  97                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
  98                 .order                  = SOC_MBUS_ORDER_LE,
  99         }, [MBUS_IDX(SBGGR10_2X8_PADLO_LE)] = {
 100                 .fourcc                 = V4L2_PIX_FMT_SBGGR10,
 101                 .name                   = "Bayer 10 BGGR",
 102                 .bits_per_sample        = 8,
 103                 .packing                = SOC_MBUS_PACKING_2X8_PADLO,
 104                 .order                  = SOC_MBUS_ORDER_LE,
 105         }, [MBUS_IDX(SBGGR10_2X8_PADHI_BE)] = {
 106                 .fourcc                 = V4L2_PIX_FMT_SBGGR10,
 107                 .name                   = "Bayer 10 BGGR",
 108                 .bits_per_sample        = 8,
 109                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 110                 .order                  = SOC_MBUS_ORDER_BE,
 111         }, [MBUS_IDX(SBGGR10_2X8_PADLO_BE)] = {
 112                 .fourcc                 = V4L2_PIX_FMT_SBGGR10,
 113                 .name                   = "Bayer 10 BGGR",
 114                 .bits_per_sample        = 8,
 115                 .packing                = SOC_MBUS_PACKING_2X8_PADLO,
 116                 .order                  = SOC_MBUS_ORDER_BE,
 117         },
 118 };
 119
 120 s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf)
 121 {
 122         switch (mf->packing) {
 123         case SOC_MBUS_PACKING_NONE:
 124                 return width * mf->bits_per_sample / 8;
 125         case SOC_MBUS_PACKING_2X8_PADHI:
 126         case SOC_MBUS_PACKING_2X8_PADLO:
 127         case SOC_MBUS_PACKING_EXTEND16:
 128                 return width * 2;
 129         }
 130         return -EINVAL;
 131 }
 132 EXPORT_SYMBOL(soc_mbus_bytes_per_line);
 133
 134 const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
 135         enum v4l2_mbus_pixelcode code)
 136 {
 137         if ((unsigned int)(code - V4L2_MBUS_FMT_FIXED) > ARRAY_SIZE(mbus_fmt))
 138                 return NULL;
 139         return mbus_fmt + code - V4L2_MBUS_FMT_FIXED - 1;
 140 }
 141 EXPORT_SYMBOL(soc_mbus_get_fmtdesc);
 142
 143 static int __init soc_mbus_init(void)
 144 {
 145         return 0;
 146 }
 147
 148 static void __exit soc_mbus_exit(void)
 149 {
 150 }
 151
 152 module_init(soc_mbus_init);
 153 module_exit(soc_mbus_exit);
 154
 155 MODULE_DESCRIPTION("soc-camera media bus interface");
 156 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
 157 MODULE_LICENSE("GPL v2");