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[media] V4L: soc_mediabus: add a method to obtain the number of samples per pixel

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Add a function to calculate the number of samples on the media-bus,
required to retrieve one pixel of a certain format.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Alberto Panizzo 2011-01-12 08:16:19 -03:00 committed by Mauro Carvalho Chehab
parent 7fdbd85bce
commit 48a3c77338
2 changed files with 15 additions and 0 deletions
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14
drivers/media/video/soc_mediabus.c
View File

@ -132,6 +132,20 @@ static const struct soc_mbus_pixelfmt mbus_fmt[] = {
},
};
int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf)
{
switch (mf->packing) {
case SOC_MBUS_PACKING_NONE:
case SOC_MBUS_PACKING_EXTEND16:
return 1;
case SOC_MBUS_PACKING_2X8_PADHI:
case SOC_MBUS_PACKING_2X8_PADLO:
return 2;
}
return -EINVAL;
}
EXPORT_SYMBOL(soc_mbus_samples_per_pixel);
s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf)
{
switch (mf->packing) {

1
include/media/soc_mediabus.h
View File

@ -61,5 +61,6 @@ struct soc_mbus_pixelfmt {
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);
#endif