[PATCH v2 4/8] media: Add P010 video format

From: Benjamin Gaignard
Date: Thu Jun 10 2021 - 11:45:39 EST

P010 is a YUV format with 10-bits per pixel with interleaved UV.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
---
version 2:
- Add documentation about P010 padding
- Fix the number of bits per component (16)

.../media/v4l/pixfmt-yuv-planar.rst | 78 ++++++++++++++++++-
drivers/media/v4l2-core/v4l2-common.c | 1 +
drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
include/uapi/linux/videodev2.h | 1 +
4 files changed, 79 insertions(+), 2 deletions(-)

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
index 090c091affd2..af400d37c8fd 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
@@ -100,8 +100,13 @@ All components are stored with the same number of bits per component.
- Cb, Cr
- No
- 64x32 macroblocks
-
- Horizontal Z order
+ * - V4L2_PIX_FMT_P010
+ - 'P010'
+ - 16
+ - 4:2:0
+ - Cb, Cr
+ - No
+ - Linear
* - V4L2_PIX_FMT_NV12MT_16X16
- 'VM12'
- 8
@@ -171,6 +176,7 @@ horizontally.
.. _V4L2-PIX-FMT-NV21:
.. _V4L2-PIX-FMT-NV12M:
.. _V4L2-PIX-FMT-NV21M:
+.. _V4L2-PIX-FMT-P010:

NV12, NV21, NV12M and NV21M
---------------------------
@@ -470,6 +476,74 @@ number of lines as the luma plane.
- Cb\ :sub:`33`
- Cr\ :sub:`33`

+.. _V4L2_PIX_FMT_P010:
+
+P010
+----
+
+The number of bytes in one luminance row must be divisible by 16,
+which means there will be padded 0 in the right edge when necessary.
+
+.. raw:: latex
+
+ \begingroup
+ \small
+ \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{2.6cm}|p{0.70cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. flat-table:: P010 16 Bits per component
+ :header-rows: 2
+ :stub-columns: 0
+
+ * - Identifier
+ - Code
+ - :cspan:`7` Byte 0 in memory
+
+ - :cspan:`7` Byte 1
+ * -
+ -
+ - 7
+ - 6
+ - 5
+ - 4
+ - 3
+ - 2
+ - 1
+ - 0
+
+ - 7
+ - 6
+ - 5
+ - 4
+ - 3
+ - 2
+ - 1
+ - 0
+ * - ``V4L2_PIX_FMT_P010``
+ - 'P010'
+
+ - Y\ :sub:`9`
+ - Y\ :sub:`8`
+ - Y\ :sub:`7`
+ - Y\ :sub:`6`
+ - Y\ :sub:`5`
+ - Y\ :sub:`4`
+ - Y\ :sub:`3`
+ - Y\ :sub:`2`
+
+ - Y\ :sub:`1`
+ - Y\ :sub:`0`
+ - 0
+ - 0
+ - 0
+ - 0
+ - 0
+ - 0
+
+.. raw:: latex
+
+ \endgroup

Fully Planar YUV Formats
========================
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 04af03285a20..37b5d82359dd 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -266,6 +266,7 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
{ .format = V4L2_PIX_FMT_NV61, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_NV24, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_NV42, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+ { .format = V4L2_PIX_FMT_P010, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },

{ .format = V4L2_PIX_FMT_YUV410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
{ .format = V4L2_PIX_FMT_YVU410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 2673f51aafa4..6404d5b6e350 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1282,6 +1282,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
+ case V4L2_PIX_FMT_P010: descr = "10-bit Y/CrCb 4:2:0"; break;
case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 9260791b8438..e5f7acde0730 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -602,6 +602,7 @@ struct v4l2_pix_format {
#define V4L2_PIX_FMT_NV24 v4l2_fourcc('N', 'V', '2', '4') /* 24 Y/CbCr 4:4:4 */
#define V4L2_PIX_FMT_NV42 v4l2_fourcc('N', 'V', '4', '2') /* 24 Y/CrCb 4:4:4 */
#define V4L2_PIX_FMT_HM12 v4l2_fourcc('H', 'M', '1', '2') /* 8 YUV 4:2:0 16x16 macroblocks */
+#define V4L2_PIX_FMT_P010 v4l2_fourcc('P', '0', '1', '0') /* 15 Y/CbCr 4:2:0 10-bit per pixel*/

/* two non contiguous planes - one Y, one Cr + Cb interleaved */
#define V4L2_PIX_FMT_NV12M v4l2_fourcc('N', 'M', '1', '2') /* 12 Y/CbCr 4:2:0 */
--
2.25.1