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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-03-21 08:03:25 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-05-15 16:10:20 -0300
commit8929c96378a162263c8e3e547975e283dfd17e7f (patch)
treee5fad4df40a1e6848b370e34e9d072058c44ccde /drivers/media/video/soc_mediabus.c
parent4e0e620ce713893b2883522a16a71b5589e8e3db (diff)
downloadlinux-8929c96378a162263c8e3e547975e283dfd17e7f.tar.bz2
[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>
Diffstat (limited to 'drivers/media/video/soc_mediabus.c')
-rw-r--r--drivers/media/video/soc_mediabus.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/media/video/soc_mediabus.c b/drivers/media/video/soc_mediabus.c
index a7073142f9f1..89dce097a827 100644
--- a/drivers/media/video/soc_mediabus.c
+++ b/drivers/media/video/soc_mediabus.c
@@ -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,