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linux-next/drivers/media/video/soc_mediabus.c
Laurent Pinchart 8929c96378 [media] soc-camera: Add soc_mbus_image_size 
The function returns the minimum size of an image for a given number of
bytes per line (as per the V4L2 specification), width and format.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-15 16:10:20 -03:00

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/*
* soc-camera media bus helper routines
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <media/v4l2-device.h>
#include <media/v4l2-mediabus.h>
#include <media/soc_mediabus.h>
static const struct soc_mbus_lookup mbus_fmt[] = {
{
.code = V4L2_MBUS_FMT_YUYV8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_YUYV,
.name = "YUYV",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_YVYU8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_YVYU,
.name = "YVYU",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_UYVY8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_UYVY,
.name = "UYVY",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_VYUY8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_VYUY,
.name = "VYUY",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB555,
.name = "RGB555",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB555X,
.name = "RGB555X",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_RGB565_2X8_LE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB565,
.name = "RGB565",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_RGB565_2X8_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB565X,
.name = "RGB565X",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SBGGR8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR8,
.name = "Bayer 8 BGGR",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SBGGR10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 10,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_Y8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_GREY,
.name = "Grey",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_Y10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_Y10,
.name = "Grey 10bit",
.bits_per_sample = 10,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADLO,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_BE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADLO,
.order = SOC_MBUS_ORDER_BE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_JPEG_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_JPEG,
.name = "JPEG",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_VARIABLE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB444,
.name = "RGB444",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_BE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_YUYV8_1_5X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_YUV420,
.name = "YUYV 4:2:0",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_1_5X8,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_YVYU8_1_5X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_YVU420,
.name = "YVYU 4:2:0",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_1_5X8,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_UYVY8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_UYVY,
.name = "UYVY 16bit",
.bits_per_sample = 16,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_VYUY8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_VYUY,
.name = "VYUY 16bit",
.bits_per_sample = 16,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_YUYV8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_YUYV,
.name = "YUYV 16bit",
.bits_per_sample = 16,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_YVYU8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_YVYU,
.name = "YVYU 16bit",
.bits_per_sample = 16,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SGRBG8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG8,
.name = "Bayer 8 GRBG",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG10DPCM8,
.name = "Bayer 10 BGGR DPCM 8",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SGBRG10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGBRG10,
.name = "Bayer 10 GBRG",
.bits_per_sample = 10,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SGRBG10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG10,
.name = "Bayer 10 GRBG",
.bits_per_sample = 10,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SRGGB10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SRGGB10,
.name = "Bayer 10 RGGB",
.bits_per_sample = 10,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SBGGR12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR12,
.name = "Bayer 12 BGGR",
.bits_per_sample = 12,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SGBRG12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGBRG12,
.name = "Bayer 12 GBRG",
.bits_per_sample = 12,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SGRBG12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG12,
.name = "Bayer 12 GRBG",
.bits_per_sample = 12,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
}, {
.code = V4L2_MBUS_FMT_SRGGB12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SRGGB12,
.name = "Bayer 12 RGGB",
.bits_per_sample = 12,
.packing = SOC_MBUS_PACKING_EXTEND16,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
},
};
int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf,
unsigned int *numerator, unsigned int *denominator)
{
switch (mf->packing) {
case SOC_MBUS_PACKING_NONE:
case SOC_MBUS_PACKING_EXTEND16:
*numerator = 1;
*denominator = 1;
return 0;
case SOC_MBUS_PACKING_2X8_PADHI:
case SOC_MBUS_PACKING_2X8_PADLO:
*numerator = 2;
*denominator = 1;
return 0;
case SOC_MBUS_PACKING_1_5X8:
*numerator = 3;
*denominator = 2;
return 0;
case SOC_MBUS_PACKING_VARIABLE:
*numerator = 0;
*denominator = 1;
return 0;
}
return -EINVAL;
}
EXPORT_SYMBOL(soc_mbus_samples_per_pixel);
s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf)
{
if (mf->layout != SOC_MBUS_LAYOUT_PACKED)
return width * mf->bits_per_sample / 8;
switch (mf->packing) {
case SOC_MBUS_PACKING_NONE:
return width * mf->bits_per_sample / 8;
case SOC_MBUS_PACKING_2X8_PADHI:
case SOC_MBUS_PACKING_2X8_PADLO:
case SOC_MBUS_PACKING_EXTEND16:
return width * 2;
case SOC_MBUS_PACKING_1_5X8:
return width * 3 / 2;
case SOC_MBUS_PACKING_VARIABLE:
return 0;
}
return -EINVAL;
}
EXPORT_SYMBOL(soc_mbus_bytes_per_line);
s32 soc_mbus_image_size(const struct soc_mbus_pixelfmt *mf,
u32 bytes_per_line, u32 height)
{
if (mf->layout == SOC_MBUS_LAYOUT_PACKED)
return bytes_per_line * height;
switch (mf->packing) {
case SOC_MBUS_PACKING_2X8_PADHI:
case SOC_MBUS_PACKING_2X8_PADLO:
return bytes_per_line * height * 2;
case SOC_MBUS_PACKING_1_5X8:
return bytes_per_line * height * 3 / 2;
default:
return -EINVAL;
}
}
EXPORT_SYMBOL(soc_mbus_image_size);
const struct soc_mbus_pixelfmt *soc_mbus_find_fmtdesc(
enum v4l2_mbus_pixelcode code,
const struct soc_mbus_lookup *lookup,
int n)
{
int i;
for (i = 0; i < n; i++)
if (lookup[i].code == code)
return &lookup[i].fmt;
return NULL;
}
EXPORT_SYMBOL(soc_mbus_find_fmtdesc);
const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
enum v4l2_mbus_pixelcode code)
{
return soc_mbus_find_fmtdesc(code, mbus_fmt, ARRAY_SIZE(mbus_fmt));
}
EXPORT_SYMBOL(soc_mbus_get_fmtdesc);
unsigned int soc_mbus_config_compatible(const struct v4l2_mbus_config *cfg,
unsigned int flags)
{
unsigned long common_flags;
bool hsync = true, vsync = true, pclk, data, mode;
bool mipi_lanes, mipi_clock;
common_flags = cfg->flags & flags;
switch (cfg->type) {
case V4L2_MBUS_PARALLEL:
hsync = common_flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH |
V4L2_MBUS_HSYNC_ACTIVE_LOW);
vsync = common_flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH |
V4L2_MBUS_VSYNC_ACTIVE_LOW);
case V4L2_MBUS_BT656:
pclk = common_flags & (V4L2_MBUS_PCLK_SAMPLE_RISING |
V4L2_MBUS_PCLK_SAMPLE_FALLING);
data = common_flags & (V4L2_MBUS_DATA_ACTIVE_HIGH |
V4L2_MBUS_DATA_ACTIVE_LOW);
mode = common_flags & (V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE);
return (!hsync || !vsync || !pclk || !data || !mode) ?
0 : common_flags;
case V4L2_MBUS_CSI2:
mipi_lanes = common_flags & V4L2_MBUS_CSI2_LANES;
mipi_clock = common_flags & (V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK |
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK);
return (!mipi_lanes || !mipi_clock) ? 0 : common_flags;
}
return 0;
}
EXPORT_SYMBOL(soc_mbus_config_compatible);
static int __init soc_mbus_init(void)
{
return 0;
}
static void __exit soc_mbus_exit(void)
{
}
module_init(soc_mbus_init);
module_exit(soc_mbus_exit);
MODULE_DESCRIPTION("soc-camera media bus interface");
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_LICENSE("GPL v2");
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