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Message-ID: <0fe86c712839e3dec8ccd0d5ac7b9489a5015f42.camel@collabora.com>
Date: Fri, 25 Oct 2024 13:31:01 -0400
From: Nicolas Dufresne <nicolas.dufresne@...labora.com>
To: Jonas Karlman <jonas@...boo.se>, Sebastian Fricke
<sebastian.fricke@...labora.com>, Ezequiel Garcia
<ezequiel@...guardiasur.com.ar>, Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Alex Bee <knaerzche@...il.com>, Benjamin Gaignard
<benjamin.gaignard@...labora.com>, Detlev Casanova
<detlev.casanova@...labora.com>, Dan Carpenter <dan.carpenter@...aro.org>,
linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org, Christopher
Obbard <chris.obbard@...labora.com>
Subject: Re: [PATCH v6 02/11] media: v4l2: Add NV15 and NV20 pixel formats
Le lundi 09 septembre 2024 à 19:25 +0000, Jonas Karlman a écrit :
> Add NV15 and NV20 pixel formats used by the Rockchip Video Decoder for
> 10-bit buffers.
>
> NV15 and NV20 is 10-bit 4:2:0/4:2:2 semi-planar YUV formats similar to
> NV12 and NV16, using 10-bit components with no padding between each
> component. Instead, a group of 4 luminance/chrominance samples are
> stored over 5 bytes in little endian order:
>
> YYYY = UVUV = 4 * 10 bits = 40 bits = 5 bytes
>
> The '15' and '20' suffix refers to the optimum effective bits per pixel
> which is achieved when the total number of luminance samples is a
> multiple of 8 for NV15 and 4 for NV20.
>
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> Tested-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
> Tested-by: Christopher Obbard <chris.obbard@...labora.com>
> ---
> v6:
> - No change
>
> v5:
> - Collect t-b tags
>
> v4:
> - No change
>
> v3:
> - Use bpp and bpp_div instead of the misuse of block_w/block_h
> - Update documentation, expand to use full 4x4 sample image
> ---
> .../media/v4l/pixfmt-yuv-planar.rst | 128 ++++++++++++++++++
> drivers/media/v4l2-core/v4l2-common.c | 2 +
> drivers/media/v4l2-core/v4l2-ioctl.c | 2 +
> include/uapi/linux/videodev2.h | 2 +
> 4 files changed, 134 insertions(+)
>
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index b788f6933855..22cad8c9726b 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -79,6 +79,13 @@ All components are stored with the same number of bits per component.
> - Cr, Cb
> - Yes
> - Linear
> + * - V4L2_PIX_FMT_NV15
When I look at the existing grouping, all the NV12 variants are together, but
this patch splits them appart, and leaves a distance with its tiled variant
NV15_4L4.
I think I'd prefer to see that right before NV15_4L4, it can also allow removing
redundant wordings between the two.
> + - 'NV15'
> + - 10
> + - 4:2:0
> + - Cb, Cr
> + - Yes
> + - Linear
> * - V4L2_PIX_FMT_NV12M
> - 'NM12'
> - 8
> @@ -172,6 +179,13 @@ All components are stored with the same number of bits per component.
> - Cr, Cb
> - Yes
> - Linear
> + * - V4L2_PIX_FMT_NV20
> + - 'NV20'
> + - 10
> + - 4:2:2
> + - Cb, Cr
> + - Yes
> + - Linear
Again, following some logic, I'd place that after V4L2_PIX_FMT_NV61M, keeping
all 8bit 4:2:2 formats before the 10bit ones.
> * - V4L2_PIX_FMT_NV16M
> - 'NM16'
> - 8
> @@ -302,6 +316,57 @@ of the luma plane.
> - Cr\ :sub:`11`
>
>
> +.. _V4L2-PIX-FMT-NV15:
> +
> +NV15
> +----
> +
> +Semi-planar 10-bit YUV 4:2:0 format similar to NV12, using 10-bit components
> +with no padding between each component. A group of 4 components are stored over
> +5 bytes in little endian order.
> +
> +.. flat-table:: Sample 4x4 NV15 Image (1 byte per cell)
> + :header-rows: 0
> + :stub-columns: 0
> +
> + * - start + 0:
> + - Y'\ :sub:`00[7:0]`
> + - Y'\ :sub:`01[5:0]`\ Y'\ :sub:`00[9:8]`
> + - Y'\ :sub:`02[3:0]`\ Y'\ :sub:`01[9:6]`
> + - Y'\ :sub:`03[1:0]`\ Y'\ :sub:`02[9:4]`
> + - Y'\ :sub:`03[9:2]`
> + * - start + 5:
> + - Y'\ :sub:`10[7:0]`
> + - Y'\ :sub:`11[5:0]`\ Y'\ :sub:`10[9:8]`
> + - Y'\ :sub:`12[3:0]`\ Y'\ :sub:`11[9:6]`
> + - Y'\ :sub:`13[1:0]`\ Y'\ :sub:`12[9:4]`
> + - Y'\ :sub:`13[9:2]`
> + * - start + 10:
> + - Y'\ :sub:`20[7:0]`
> + - Y'\ :sub:`21[5:0]`\ Y'\ :sub:`20[9:8]`
> + - Y'\ :sub:`22[3:0]`\ Y'\ :sub:`21[9:6]`
> + - Y'\ :sub:`23[1:0]`\ Y'\ :sub:`22[9:4]`
> + - Y'\ :sub:`23[9:2]`
> + * - start + 15:
> + - Y'\ :sub:`30[7:0]`
> + - Y'\ :sub:`31[5:0]`\ Y'\ :sub:`30[9:8]`
> + - Y'\ :sub:`32[3:0]`\ Y'\ :sub:`31[9:6]`
> + - Y'\ :sub:`33[1:0]`\ Y'\ :sub:`32[9:4]`
> + - Y'\ :sub:`33[9:2]`
> + * - start + 20:
> + - Cb\ :sub:`00[7:0]`
> + - Cr\ :sub:`00[5:0]`\ Cb\ :sub:`00[9:8]`
> + - Cb\ :sub:`01[3:0]`\ Cr\ :sub:`00[9:6]`
> + - Cr\ :sub:`01[1:0]`\ Cb\ :sub:`01[9:4]`
> + - Cr\ :sub:`01[9:2]`
> + * - start + 25:
> + - Cb\ :sub:`10[7:0]`
> + - Cr\ :sub:`10[5:0]`\ Cb\ :sub:`10[9:8]`
> + - Cb\ :sub:`11[3:0]`\ Cr\ :sub:`10[9:6]`
> + - Cr\ :sub:`11[1:0]`\ Cb\ :sub:`11[9:4]`
> + - Cr\ :sub:`11[9:2]`
> +
> +
> .. _V4L2-PIX-FMT-NV12MT:
> .. _V4L2-PIX-FMT-NV12MT-16X16:
> .. _V4L2-PIX-FMT-NV12-4L4:
> @@ -631,6 +696,69 @@ number of lines as the luma plane.
> - Cr\ :sub:`32`
>
>
> +.. _V4L2-PIX-FMT-NV20:
> +
> +NV20
> +----
> +
> +Semi-planar 10-bit YUV 4:2:2 format similar to NV16, using 10-bit components
> +with no padding between each component. A group of 4 components are stored over
> +5 bytes in little endian order.
> +
> +.. flat-table:: Sample 4x4 NV20 Image (1 byte per cell)
> + :header-rows: 0
> + :stub-columns: 0
> +
> + * - start + 0:
> + - Y'\ :sub:`00[7:0]`
> + - Y'\ :sub:`01[5:0]`\ Y'\ :sub:`00[9:8]`
> + - Y'\ :sub:`02[3:0]`\ Y'\ :sub:`01[9:6]`
> + - Y'\ :sub:`03[1:0]`\ Y'\ :sub:`02[9:4]`
> + - Y'\ :sub:`03[9:2]`
> + * - start + 5:
> + - Y'\ :sub:`10[7:0]`
> + - Y'\ :sub:`11[5:0]`\ Y'\ :sub:`10[9:8]`
> + - Y'\ :sub:`12[3:0]`\ Y'\ :sub:`11[9:6]`
> + - Y'\ :sub:`13[1:0]`\ Y'\ :sub:`12[9:4]`
> + - Y'\ :sub:`13[9:2]`
> + * - start + 10:
> + - Y'\ :sub:`20[7:0]`
> + - Y'\ :sub:`21[5:0]`\ Y'\ :sub:`20[9:8]`
> + - Y'\ :sub:`22[3:0]`\ Y'\ :sub:`21[9:6]`
> + - Y'\ :sub:`23[1:0]`\ Y'\ :sub:`22[9:4]`
> + - Y'\ :sub:`23[9:2]`
> + * - start + 15:
> + - Y'\ :sub:`30[7:0]`
> + - Y'\ :sub:`31[5:0]`\ Y'\ :sub:`30[9:8]`
> + - Y'\ :sub:`32[3:0]`\ Y'\ :sub:`31[9:6]`
> + - Y'\ :sub:`33[1:0]`\ Y'\ :sub:`32[9:4]`
> + - Y'\ :sub:`33[9:2]`
> + * - start + 20:
> + - Cb\ :sub:`00[7:0]`
> + - Cr\ :sub:`00[5:0]`\ Cb\ :sub:`00[9:8]`
> + - Cb\ :sub:`01[3:0]`\ Cr\ :sub:`00[9:6]`
> + - Cr\ :sub:`01[1:0]`\ Cb\ :sub:`01[9:4]`
> + - Cr\ :sub:`01[9:2]`
> + * - start + 25:
> + - Cb\ :sub:`10[7:0]`
> + - Cr\ :sub:`10[5:0]`\ Cb\ :sub:`10[9:8]`
> + - Cb\ :sub:`11[3:0]`\ Cr\ :sub:`10[9:6]`
> + - Cr\ :sub:`11[1:0]`\ Cb\ :sub:`11[9:4]`
> + - Cr\ :sub:`11[9:2]`
> + * - start + 30:
> + - Cb\ :sub:`20[7:0]`
> + - Cr\ :sub:`20[5:0]`\ Cb\ :sub:`20[9:8]`
> + - Cb\ :sub:`21[3:0]`\ Cr\ :sub:`20[9:6]`
> + - Cr\ :sub:`21[1:0]`\ Cb\ :sub:`21[9:4]`
> + - Cr\ :sub:`21[9:2]`
> + * - start + 35:
> + - Cb\ :sub:`30[7:0]`
> + - Cr\ :sub:`30[5:0]`\ Cb\ :sub:`30[9:8]`
> + - Cb\ :sub:`31[3:0]`\ Cr\ :sub:`30[9:6]`
> + - Cr\ :sub:`31[1:0]`\ Cb\ :sub:`31[9:4]`
> + - Cr\ :sub:`31[9:2]`
> +
> +
> .. _V4L2-PIX-FMT-NV24:
> .. _V4L2-PIX-FMT-NV42:
>
> diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
> index 8ad04d48a023..53b6fdfcb4dd 100644
> --- a/drivers/media/v4l2-core/v4l2-common.c
> +++ b/drivers/media/v4l2-core/v4l2-common.c
> @@ -277,8 +277,10 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
> /* YUV planar formats */
> { .format = V4L2_PIX_FMT_NV12, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 },
> { .format = V4L2_PIX_FMT_NV21, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 },
> + { .format = V4L2_PIX_FMT_NV15, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 5, 10, 0, 0 }, .bpp_div = { 4, 4, 1, 1 }, .hdiv = 2, .vdiv = 2 },
> { .format = V4L2_PIX_FMT_NV16, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 },
> { .format = V4L2_PIX_FMT_NV61, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 },
> + { .format = V4L2_PIX_FMT_NV20, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 5, 10, 0, 0 }, .bpp_div = { 4, 4, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 },
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index e14db67be97c..9f09f5cf3e3e 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1360,8 +1360,10 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> case V4L2_PIX_FMT_YUV48_12: descr = "12-bit YUV 4:4:4 Packed"; break;
> case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break;
> case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break;
> + case V4L2_PIX_FMT_NV15: descr = "10-bit Y/UV 4:2:0 (Packed)"; break;
> case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break;
> case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break;
> + case V4L2_PIX_FMT_NV20: descr = "10-bit Y/UV 4:2:2 (Packed)"; break;
> case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break;
> case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break;
> case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break;
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 725e86c4bbbd..941a96b81672 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -642,8 +642,10 @@ struct v4l2_pix_format {
> /* two planes -- one Y, one Cr + Cb interleaved */
> #define V4L2_PIX_FMT_NV12 v4l2_fourcc('N', 'V', '1', '2') /* 12 Y/CbCr 4:2:0 */
> #define V4L2_PIX_FMT_NV21 v4l2_fourcc('N', 'V', '2', '1') /* 12 Y/CrCb 4:2:0 */
> +#define V4L2_PIX_FMT_NV15 v4l2_fourcc('N', 'V', '1', '5') /* 15 Y/CbCr 4:2:0 10-bit packed */
> #define V4L2_PIX_FMT_NV16 v4l2_fourcc('N', 'V', '1', '6') /* 16 Y/CbCr 4:2:2 */
> #define V4L2_PIX_FMT_NV61 v4l2_fourcc('N', 'V', '6', '1') /* 16 Y/CrCb 4:2:2 */
> +#define V4L2_PIX_FMT_NV20 v4l2_fourcc('N', 'V', '2', '0') /* 20 Y/CbCr 4:2:2 10-bit packed */
> #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_P010 v4l2_fourcc('P', '0', '1', '0') /* 24 Y/CbCr 4:2:0 10-bit per component */
Appart from the location, I'm happy with the implementation and the
documentation.
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
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