path: root/Documentation/media/uapi
diff options
Diffstat (limited to 'Documentation/media/uapi')
1 files changed, 14 insertions, 1 deletions
diff --git a/Documentation/media/uapi/v4l/pixfmt-reserved.rst b/Documentation/media/uapi/v4l/pixfmt-reserved.rst
index 38af1472a4b4..0c399858bda2 100644
--- a/Documentation/media/uapi/v4l/pixfmt-reserved.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-reserved.rst
@@ -243,7 +243,20 @@ please make a proposal on the linux-media mailing list.
It is an opaque intermediate format and the MDP hardware must be
used to convert ``V4L2_PIX_FMT_MT21C`` to ``V4L2_PIX_FMT_NV12M``,
``V4L2_PIX_FMT_YUV420M`` or ``V4L2_PIX_FMT_YVU420``.
+ - 'ST12'
+ - Two-planar NV12-based format used by the video engine found on Allwinner
+ (codenamed sunxi) platforms, with 32x32 tiles for the luminance plane
+ and 32x64 tiles for the chrominance plane. The data in each tile is
+ stored in linear order, within the tile bounds. Each tile follows the
+ previous one linearly in memory (from left to right, top to bottom).
+ The associated buffer dimensions are aligned to match an integer number
+ of tiles, resulting in 32-aligned resolutions for the luminance plane
+ and 16-aligned resolutions for the chrominance plane (with 2x2
+ subsampling).
.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|

Privacy Policy