LXR linux/include/media/soc

   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 */
  27enum 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 */
  39enum 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 */
  53struct 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
  61const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
  62        enum v4l2_mbus_pixelcode code);
  63s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf);
  64
  65#endif
  66