[1/2] soc_mediabus: export a useful method to obtain the number of samples that makes up a pixel format

Commit Message

Alberto Panizzo Jan. 12, 2011, 11:16 a.m. UTC

None

Patch

diff --git a/drivers/media/video/soc_mediabus.c b/drivers/media/video/soc_mediabus.c
index 9139121..5bba424 100644
--- a/drivers/media/video/soc_mediabus.c
+++ b/drivers/media/video/soc_mediabus.c
@@ -132,6 +132,20 @@  static const struct soc_mbus_pixelfmt mbus_fmt[] = {
 	},
 };
 
+s32 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) {
diff --git a/include/media/soc_mediabus.h b/include/media/soc_mediabus.h
index 037cd7b..f21cbd0 100644
--- a/include/media/soc_mediabus.h
+++ b/include/media/soc_mediabus.h
@@ -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);
+s32 soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf);
 
 #endif