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Guennadi Liakhovetski9a742512009-12-11 11:41:28 -03001/*
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