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SubjectRe: [PATCH 2/2] [WIP]: media: Add Synaptics compressed tiled format
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On 8/18/22 14:06, Tomasz Figa wrote:
> CAUTION: Email originated externally, do not click links or open attachments unless you recognize the sender and know the content is safe.
>
>
> Hi Randy,
>
> On Tue, Aug 9, 2022 at 1:28 AM Hsia-Jun Li <randy.li@synaptics.com> wrote:
>>
>> From: "Hsia-Jun(Randy) Li" <randy.li@synaptics.com>
>>
>> The most of detail has been written in the drm.
>> Please notice that the tiled formats here request
>> one more plane for storing the motion vector metadata.
>> This buffer won't be compressed, so you can't append
>> it to luma or chroma plane.
>
> Does the motion vector buffer need to be exposed to userspace? Is the
> decoder stateless (requires userspace to specify the reference frames)
> or stateful (manages the entire decoding process internally)?
>
No, users don't need to access them at all. Just they need a different
dma-heap.

You would only get the stateful version of both encoder and decoder.
> Best regards,
> Tomasz
>
>>
>> Signed-off-by: Hsia-Jun(Randy) Li <randy.li@synaptics.com>
>> ---
>> drivers/media/v4l2-core/v4l2-common.c | 1 +
>> drivers/media/v4l2-core/v4l2-ioctl.c | 2 ++
>> include/uapi/linux/videodev2.h | 2 ++
>> 3 files changed, 5 insertions(+)
>>
>> diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
>> index e0fbe6ba4b6c..f645278b3055 100644
>> --- a/drivers/media/v4l2-core/v4l2-common.c
>> +++ b/drivers/media/v4l2-core/v4l2-common.c
>> @@ -314,6 +314,7 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
>> { .format = V4L2_PIX_FMT_SGBRG12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
>> { .format = V4L2_PIX_FMT_SGRBG12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
>> { .format = V4L2_PIX_FMT_SRGGB12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
>> + { .format = V4L2_PIX_FMT_NV12M_V4H1C, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 5, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2, .block_w = { 128, 128 }, .block_h = { 128, 128 } },
>> };
>> unsigned int i;
>>
>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
>> index e6fd355a2e92..8f65964aff08 100644
>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
>> @@ -1497,6 +1497,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>> case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
>> case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break;
>> case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break;
>> + case V4L2_PIX_FMT_NV12M_V4H1C: descr = "Synaptics Compressed 8-bit tiled Format";break;
>> + case V4L2_PIX_FMT_NV12M_10_V4H3P8C: descr = "Synaptics Compressed 10-bit tiled Format";break;
>> default:
>> if (fmt->description[0])
>> return;
>> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
>> index 01e630f2ec78..7e928cb69e7c 100644
>> --- a/include/uapi/linux/videodev2.h
>> +++ b/include/uapi/linux/videodev2.h
>> @@ -661,6 +661,8 @@ struct v4l2_pix_format {
>> #define V4L2_PIX_FMT_NV12MT_16X16 v4l2_fourcc('V', 'M', '1', '2') /* 12 Y/CbCr 4:2:0 16x16 tiles */
>> #define V4L2_PIX_FMT_NV12M_8L128 v4l2_fourcc('N', 'A', '1', '2') /* Y/CbCr 4:2:0 8x128 tiles */
>> #define V4L2_PIX_FMT_NV12M_10BE_8L128 v4l2_fourcc_be('N', 'T', '1', '2') /* Y/CbCr 4:2:0 10-bit 8x128 tiles */
>> +#define V4L2_PIX_FMT_NV12M_V4H1C v4l2_fourcc('S', 'Y', '1', '2') /* 12 Y/CbCr 4:2:0 tiles */
>> +#define V4L2_PIX_FMT_NV12M_10_V4H3P8C v4l2_fourcc('S', 'Y', '1', '0') /* 12 Y/CbCr 4:2:0 10-bits tiles */
>>
>> /* Bayer formats - see https://urldefense.proofpoint.com/v2/url?u=http-3A__www.siliconimaging.com_RGB-2520Bayer.htm&d=DwIBaQ&c=7dfBJ8cXbWjhc0BhImu8wVIoUFmBzj1s88r8EGyM0UY&r=P4xb2_7biqBxD4LGGPrSV6j-jf3C3xlR7PXU-mLTeZE&m=vmpysqneiHK3UXcq6UOewdMwobFa70zKB3RuOgYT02aFw9fCs6qd7j-U1sYSey79&s=yblzF1GwanMEJFC3yt9nBAQjaaAEJKKlNgj4k64v5eE&e= */
>> #define V4L2_PIX_FMT_SBGGR8 v4l2_fourcc('B', 'A', '8', '1') /* 8 BGBG.. GRGR.. */
>> --
>> 2.17.1
>>

--
Hsia-Jun(Randy) Li

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