include/media/soc_mediabus.h

   1 /*
   2  * SoC-camera Media Bus API extensions
   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 #ifndef SOC_MEDIABUS_H
  12 #define SOC_MEDIABUS_H
  13
  14 #include <linux/videodev2.h>
  15
  16 #include <media/v4l2-mediabus.h>
  17
  18 /**
  19  * enum soc_mbus_packing - data packing types on the media-bus
  20  * @SOC_MBUS_PACKING_NONE:      no packing, bit-for-bit transfer to RAM
  21  * @SOC_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the
  22  *                              possibly incomplete byte high bits are padding
  23  * @SOC_MBUS_PACKING_2X8_PADLO: as above, but low bits are padding
  24  * @SOC_MBUS_PACKING_EXTEND16:  sample width (e.g., 10 bits) has to be extended
  25  *                              to 16 bits
  26  */
  27 enum soc_mbus_packing {
  28         SOC_MBUS_PACKING_NONE,
  29         SOC_MBUS_PACKING_2X8_PADHI,
  30         SOC_MBUS_PACKING_2X8_PADLO,
  31         SOC_MBUS_PACKING_EXTEND16,
  32 };
  33
  34 /**
  35  * enum soc_mbus_order - sample order on the media bus
  36  * @SOC_MBUS_ORDER_LE:          least significant sample first
  37  * @SOC_MBUS_ORDER_BE:          most significant sample first
  38  */
  39 enum soc_mbus_order {
  40         SOC_MBUS_ORDER_LE,
  41         SOC_MBUS_ORDER_BE,
  42 };
  43
  44 /**
  45  * struct soc_mbus_pixelfmt - Data format on the media bus
  46  * @name:               Name of the format
  47  * @fourcc:             Fourcc code, that will be obtained if the data is
  48  *                      stored in memory in the following way:
  49  * @packing:            Type of sample-packing, that has to be used
  50  * @order:              Sample order when storing in memory
  51  * @bits_per_sample:    How many bits the bridge has to sample
  52  */
  53 struct soc_mbus_pixelfmt {
  54         const char              *name;
  55         u32                     fourcc;
  56         enum soc_mbus_packing   packing;
  57         enum soc_mbus_order     order;
  58         u8                      bits_per_sample;
  59 };
  60
  61 const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
  62         enum v4l2_mbus_pixelcode code);
  63 s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf);
  64
  65 #endif