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@xxxxxxxxxxxxxxxx>
---
drivers/media/video/soc_mediabus.c | 18 ++++++++++++++++++
include/media/soc_mediabus.h | 2 ++
2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/soc_mediabus.c b/drivers/media/video/soc_mediabus.c
index a707314..89dce09 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,
diff --git a/include/media/soc_mediabus.h b/include/media/soc_mediabus.h
index e18eed4..0dc6f46 100644
--- a/include/media/soc_mediabus.h
+++ b/include/media/soc_mediabus.h
@@ -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,
--
1.7.3.4
--
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