mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
cc552b620f
12-bit formats, similar to YUV 4:2:0 occupy 3 bytes for each two pixels and cannot be described by any of the existing SOC_MBUS_PACKING_* macros. This patch adds a new one SOC_MBUS_PACKING_1_5X8 to describe such formats and extends soc_mbus_samples_per_pixel() to support it. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/*
|
|
* SoC-camera Media Bus API extensions
|
|
*
|
|
* Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef SOC_MEDIABUS_H
|
|
#define SOC_MEDIABUS_H
|
|
|
|
#include <linux/videodev2.h>
|
|
#include <linux/v4l2-mediabus.h>
|
|
|
|
/**
|
|
* enum soc_mbus_packing - data packing types on the media-bus
|
|
* @SOC_MBUS_PACKING_NONE: no packing, bit-for-bit transfer to RAM, one
|
|
* sample represents one pixel
|
|
* @SOC_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the
|
|
* possibly incomplete byte high bits are padding
|
|
* @SOC_MBUS_PACKING_2X8_PADLO: as above, but low bits are padding
|
|
* @SOC_MBUS_PACKING_EXTEND16: sample width (e.g., 10 bits) has to be extended
|
|
* to 16 bits
|
|
* @SOC_MBUS_PACKING_VARIABLE: compressed formats with variable packing
|
|
* @SOC_MBUS_PACKING_1_5X8: used for packed YUV 4:2:0 formats, where 4
|
|
* pixels occupy 6 bytes in RAM
|
|
*/
|
|
enum soc_mbus_packing {
|
|
SOC_MBUS_PACKING_NONE,
|
|
SOC_MBUS_PACKING_2X8_PADHI,
|
|
SOC_MBUS_PACKING_2X8_PADLO,
|
|
SOC_MBUS_PACKING_EXTEND16,
|
|
SOC_MBUS_PACKING_VARIABLE,
|
|
SOC_MBUS_PACKING_1_5X8,
|
|
};
|
|
|
|
/**
|
|
* enum soc_mbus_order - sample order on the media bus
|
|
* @SOC_MBUS_ORDER_LE: least significant sample first
|
|
* @SOC_MBUS_ORDER_BE: most significant sample first
|
|
*/
|
|
enum soc_mbus_order {
|
|
SOC_MBUS_ORDER_LE,
|
|
SOC_MBUS_ORDER_BE,
|
|
};
|
|
|
|
/**
|
|
* struct soc_mbus_pixelfmt - Data format on the media bus
|
|
* @name: Name of the format
|
|
* @fourcc: Fourcc code, that will be obtained if the data is
|
|
* stored in memory in the following way:
|
|
* @packing: Type of sample-packing, that has to be used
|
|
* @order: Sample order when storing in memory
|
|
* @bits_per_sample: How many bits the bridge has to sample
|
|
*/
|
|
struct soc_mbus_pixelfmt {
|
|
const char *name;
|
|
u32 fourcc;
|
|
enum soc_mbus_packing packing;
|
|
enum soc_mbus_order order;
|
|
u8 bits_per_sample;
|
|
};
|
|
|
|
/**
|
|
* struct soc_mbus_lookup - Lookup FOURCC IDs by mediabus codes for pass-through
|
|
* @code: mediabus pixel-code
|
|
* @fmt: pixel format description
|
|
*/
|
|
struct soc_mbus_lookup {
|
|
enum v4l2_mbus_pixelcode code;
|
|
struct soc_mbus_pixelfmt fmt;
|
|
};
|
|
|
|
const struct soc_mbus_pixelfmt *soc_mbus_find_fmtdesc(
|
|
enum v4l2_mbus_pixelcode code,
|
|
const struct soc_mbus_lookup *lookup,
|
|
int n);
|
|
const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
|
|
enum v4l2_mbus_pixelcode code);
|
|
s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf);
|
|
int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf,
|
|
unsigned int *numerator, unsigned int *denominator);
|
|
|
|
#endif
|