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Commit 8929c963 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
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[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: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 4e0e620c

drivers/media/video/soc_mediabus.c

+18 −0
Original line number Diff line number Diff line
@@ -397,6 +397,24 @@ s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf) 
}

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,

include/media/soc_mediabus.h

+2 −0
Original line number Diff line number Diff line
@@ -99,6 +99,8 @@ const struct soc_mbus_pixelfmt *soc_mbus_find_fmtdesc( 
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);

s32 soc_mbus_image_size(const struct soc_mbus_pixelfmt *mf,

			u32 bytes_per_line, u32 height);

int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf,

			unsigned int *numerator, unsigned int *denominator);

unsigned int soc_mbus_config_compatible(const struct v4l2_mbus_config *cfg,