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Date: Mon, 20 Feb 2023 23:59:29 +0200
From: "mirela.rabulea@....nxp.com" <mirela.rabulea@....nxp.com>
To: Ming Qian <ming.qian@....com>,
"mchehab@...nel.org" <mchehab@...nel.org>,
"hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
"nicolas@...fresne.ca" <nicolas@...fresne.ca>
Cc: "shawnguo@...nel.org" <shawnguo@...nel.org>,
"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
"festevam@...il.com" <festevam@...il.com>,
"X.H. Bao" <xiahong.bao@....com>, dl-linux-imx <linux-imx@....com>,
"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 03/10] media: Add YUYV64_12 video format
Hi Ming,
On 20.02.2023 04:15, Ming Qian wrote:
>> From: Mirela Rabulea (OSS) <mirela.rabulea@....nxp.com>
>> Sent: 2023年2月19日 5:52
>> To: Ming Qian <ming.qian@....com>; mchehab@...nel.org; hverkuil-
>> cisco@...all.nl; nicolas@...fresne.ca
>> Cc: shawnguo@...nel.org; s.hauer@...gutronix.de; kernel@...gutronix.de;
>> festevam@...il.com; X.H. Bao <xiahong.bao@....com>; dl-linux-imx <linux-
>> imx@....com>; linux-media@...r.kernel.org; linux-kernel@...r.kernel.org;
>> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org
>> Subject: Re: [PATCH v3 03/10] media: Add YUYV64_12 video format
>>
>> Hi,
>>
>> On 14.02.2023 12:04, Ming Qian wrote:
>>> YUYV64_12 is a YUV format with 12-bits per component like YUYV,
>>> expanded to 16bits.
>>> Data in the 12 high bits, zeros in the 4 low bits, arranged in little
>>> endian order.
>>>
>>> Signed-off-by: Ming Qian <ming.qian@....com>
>>> ---
>>> .../media/v4l/pixfmt-packed-yuv.rst | 42 +++++++++++++++++++
>>> 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, 45 insertions(+)
>>>
>>> diff --git
>>> a/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
>>> b/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
>>> index bf283a1b5581..76fc331f126e 100644
>>> --- a/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
>>> +++ b/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
>>> @@ -341,6 +341,48 @@ components horizontally by 2, storing 2 pixels in 4
>> bytes.
>>>
>>> \normalsize
>>>
>>> +The next lists the packed YUV 4:2:2 formats with more than 8 bits per
>> component.
>>> +expand the bits per component to 16 bits, data in the high bits,
>>> +zeros in the low bits, arranged in little endian order. storing 2 pixels in 8
>> bytes.
>>> +
>>> +.. raw:: latex
>>> +
>>> + \footnotesize
>>> +
>>> +.. tabularcolumns::
>>>
>> +|p{3.4cm}|p{1.2cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8
>>> +cm}|p{0.8cm}|p{0.8cm}|
>>> +
>>> +.. flat-table:: Packed YUV 4:2:2 Formats (more than 8bpc)
>>> + :header-rows: 1
>>> + :stub-columns: 0
>>> +
>>> + * - Identifier
>>> + - Code
>>> + - Byte 1-0
>>> + - Byte 3-2
>>> + - Byte 5-4
>>> + - Byte 7-6
>>> + - Byte 9-8
>>> + - Byte 11-10
>>> + - Byte 13-12
>>> + - Byte 15-14
>>> + * .. _V4L2-PIX-FMT-YUYV64-12:
>>> +
>>> + - ``V4L2_PIX_FMT_YUYV64_12``
>>> + - 'Y212'
>>> +
>>> + - Y'\ :sub:`0`
>>> + - Cb\ :sub:`0`
>>> + - Y'\ :sub:`1`
>>> + - Cr\ :sub:`0`
>>> + - Y'\ :sub:`2`
>>> + - Cb\ :sub:`2`
>>> + - Y'\ :sub:`3`
>>> + - Cr\ :sub:`2`
>>> +
>>> +.. raw:: latex
>>> +
>>> + \normalsize
>>> +
>>> **Color Sample Location:**
>>> Chroma samples are :ref:`interstitially sited<yuv-chroma-centered>`
>>> horizontally.
>>> diff --git a/drivers/media/v4l2-core/v4l2-common.c
>>> b/drivers/media/v4l2-core/v4l2-common.c
>>> index a5e8ba370d33..8fb1c0fa8158 100644
>>> --- a/drivers/media/v4l2-core/v4l2-common.c
>>> +++ b/drivers/media/v4l2-core/v4l2-common.c
>>> @@ -258,6 +258,7 @@ const struct v4l2_format_info
>> *v4l2_format_info(u32 format)
>>> { .format = V4L2_PIX_FMT_YVYU, .pixel_enc =
>> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0,
>> 0 }, .hdiv = 2, .vdiv = 1 },
>>> { .format = V4L2_PIX_FMT_UYVY, .pixel_enc =
>> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0,
>> 0 }, .hdiv = 2, .vdiv = 1 },
>>> { .format = V4L2_PIX_FMT_VYUY, .pixel_enc =
>> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0,
>> 0 }, .hdiv = 2, .vdiv = 1 },
>>> + { .format = V4L2_PIX_FMT_YUYV64_12, .pixel_enc =
>>> +V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0,
>>> +0, 0 }, .hdiv = 2, .vdiv = 1 },
>>>
>>> /* 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 }, .hdiv = 2, .vdiv = 2 },
>>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
>>> b/drivers/media/v4l2-core/v4l2-ioctl.c
>>> index ec1c9ef27e88..e5002d6fe7ee 100644
>>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
>>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
>>> @@ -1343,6 +1343,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc
>> *fmt)
>>> case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
>>> case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)";
>> break;
>>> case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)";
>> break;
>>> + case V4L2_PIX_FMT_YUYV64_12: descr = "12-bit Depth YUYV
>> 4:2:2"; 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_NV16: descr = "Y/UV 4:2:2"; break;
>>> diff --git a/include/uapi/linux/videodev2.h
>>> b/include/uapi/linux/videodev2.h index 3d8f89bff33c..3712a36d6fdf
>>> 100644
>>> --- a/include/uapi/linux/videodev2.h
>>> +++ b/include/uapi/linux/videodev2.h
>>> @@ -618,6 +618,7 @@ struct v4l2_pix_format {
>>> #define V4L2_PIX_FMT_YUVA32 v4l2_fourcc('Y', 'U', 'V', 'A') /* 32 YUVA-8-
>> 8-8-8 */
>>> #define V4L2_PIX_FMT_YUVX32 v4l2_fourcc('Y', 'U', 'V', 'X') /* 32 YUVX-8-
>> 8-8-8 */
>>> #define V4L2_PIX_FMT_M420 v4l2_fourcc('M', '4', '2', '0') /* 12 YUV 4:2:0
>> 2 lines y, 1 line uv interleaved */
>>> +#define V4L2_PIX_FMT_YUYV64_12 v4l2_fourcc('Y', '2', '1', '2') /* 32 YUYV
>> 12-bit per component */
>>
>> It seems Y212 is already added with the same fourcc code, causing build
>> errors:
>>
>> drivers/media/v4l2-core/v4l2-ioctl.c: In function ‘v4l_fill_fmtdesc’:
>> drivers/media/v4l2-core/v4l2-ioctl.c:1455:9: error: duplicate case value
>> 1455 | case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV
>> Packed"; break;
>> | ^~~~
>> drivers/media/v4l2-core/v4l2-ioctl.c:1349:9: note: previously used here
>> 1349 | case V4L2_PIX_FMT_YUYV64_12: descr = "12-bit Depth
>> YUYV 4:2:2"; break;
>> | ^~~~
>>
>> Regards,
>> Mirela
>
> Hi Mirela,
> Would you please double check it?
> The format V4L2_PIX_FMT_Y212 was added by the first version of this patchset, and it should be replaced by
> V4L2_PIX_FMT_YUYV64_12 in this v3 patchset.
> And I checked my patch, and my local environment, I didn't found any V4L2_PIX_FMT_Y212, and I didn't meet this build error
>
> Ming
I applied the _v3 version of the patches over linux-next, and the build
error comes from conflicting definition of the fourcc
#define V4L2_PIX_FMT_YUYV64_12 v4l2_fourcc('Y', '2', '1', '2') /* 32
YUYV 12-bit per component */
with this patch, which adds:
+#define V4L2_PIX_FMT_Y212 v4l2_fourcc('Y', '2', '1', '2') /* 32
YUYV 4:2:2 */
commit 0dc1d7a79a8d13e316d3b168e9fc57e376099c7a
Author: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
Date: Wed Dec 21 11:24:43 2022 +0200
media: Add Y210, Y212 and Y216 formats
Add Y210, Y212 and Y216 formats.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
Reviewed-by: Laurent Pinchart
<laurent.pinchart+renesas@...asonboard.com>
Acked-by: Mauro Carvalho Chehab <mchehab@...nel.org>
Acked-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Laurent Pinchart
<laurent.pinchart+renesas@...asonboard.com>
https://patchwork.kernel.org/project/linux-media/patch/20221219140139.294245-3-tomi.valkeinen+renesas@ideasonboard.com/
In this case, matching the formats defined in DRM was the stronger
argument for the format naming scheme.
Regards,
Mirela
>
>>>
>>> /* 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 */
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