[media] V4L: soc-camera: add a new packing for YUV 4:2:0 type formats

12-bit formats, similar to YUV 4:2:0 occupy 3 bytes for each two pixels
and cannot be described by any of the existing SOC_MBUS_PACKING_* macros.
This patch adds a new one SOC_MBUS_PACKING_1_5X8 to describe such
formats and extends soc_mbus_samples_per_pixel() to support it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/include/media/soc_mediabus.h b/include/media/soc_mediabus.h
index 3eed98ed02f2..fae432544b41 100644
--- a/include/media/soc_mediabus.h
+++ b/include/media/soc_mediabus.h
@@ -16,12 +16,16 @@
 
 /**
  * enum soc_mbus_packing - data packing types on the media-bus
- * @SOC_MBUS_PACKING_NONE:      no packing, bit-for-bit transfer to RAM
+ * @SOC_MBUS_PACKING_NONE:      no packing, bit-for-bit transfer to RAM, one
+ *                              sample represents one pixel
  * @SOC_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the
  *                              possibly incomplete byte high bits are padding
  * @SOC_MBUS_PACKING_2X8_PADLO: as above, but low bits are padding
  * @SOC_MBUS_PACKING_EXTEND16:  sample width (e.g., 10 bits) has to be extended
  *                              to 16 bits
+ * @SOC_MBUS_PACKING_VARIABLE:  compressed formats with variable packing
+ * @SOC_MBUS_PACKING_1_5X8:     used for packed YUV 4:2:0 formats, where 4
+ *                              pixels occupy 6 bytes in RAM
  */
 enum soc_mbus_packing {
         SOC_MBUS_PACKING_NONE,
@@ -29,6 +33,7 @@ enum soc_mbus_packing {
         SOC_MBUS_PACKING_2X8_PADLO,
         SOC_MBUS_PACKING_EXTEND16,
         SOC_MBUS_PACKING_VARIABLE,
+        SOC_MBUS_PACKING_1_5X8,
 };
 
 /**
@@ -75,6 +80,7 @@ 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);
-int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf);
+int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf,
+                        unsigned int *numerator, unsigned int *denominator);
 
 #endif