lkml.org 
[lkml]   [2021]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v6 04/10] hantro: Add quirk for NV12/NV12_4L4 capture format
From
Date
W dniu 28.09.2021 o 17:08, Nicolas Dufresne pisze:
> Le lundi 27 septembre 2021 à 17:19 +0200, Andrzej Pietrasiewicz a écrit :
>> From: Ezequiel Garcia <ezequiel@collabora.com>
>>
>> The G2 core decoder engine produces NV12_4L4 format,
>> which is a simple NV12 4x4 tiled format. The driver currently
>> hides this format by always enabling the post-processor engine,
>> and therefore offering NV12 directly.
>>
>> This is done without using the logic in hantro_postproc.c
>> and therefore makes it difficult to add VP9 cleanly.
>>
>> Since fixing this is not easy, add a small quirk to force
>> NV12 if HEVC was configured, but otherwise declare NV12_4L4
>> as the pixel format in imx8mq_vpu_g2_variant.dec_fmts.
>>
>> This will be used by the VP9 decoder which will be added soon.
>>
>> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
>> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
>> ---
>> drivers/staging/media/hantro/hantro_v4l2.c | 14 ++++++++++++++
>> drivers/staging/media/hantro/imx8m_vpu_hw.c | 2 +-
>> 2 files changed, 15 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
>> index bcb0bdff4a9a..d1f060c55fed 100644
>> --- a/drivers/staging/media/hantro/hantro_v4l2.c
>> +++ b/drivers/staging/media/hantro/hantro_v4l2.c
>> @@ -150,6 +150,20 @@ static int vidioc_enum_fmt(struct file *file, void *priv,
>> unsigned int num_fmts, i, j = 0;
>> bool skip_mode_none;
>>
>> + /*
>> + * The HEVC decoder on the G2 core needs a little quirk to offer NV12
>> + * only on the capture side. Once the post-processor logic is used,
>> + * we will be able to expose NV12_4L4 and NV12 as the other cases,
>> + * and therefore remove this quirk.
>> + */
>> + if (capture && ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_HEVC_SLICE) {
>> + if (f->index == 0) {
>> + f->pixelformat = V4L2_PIX_FMT_NV12;
>> + return 0;
>> + }
>> + return -EINVAL;
>> + }
>> +
>> /*
>> * When dealing with an encoder:
>> * - on the capture side we want to filter out all MODE_NONE formats.
>> diff --git a/drivers/staging/media/hantro/imx8m_vpu_hw.c b/drivers/staging/media/hantro/imx8m_vpu_hw.c
>> index 02e61438220a..a40b161e5956 100644
>> --- a/drivers/staging/media/hantro/imx8m_vpu_hw.c
>> +++ b/drivers/staging/media/hantro/imx8m_vpu_hw.c
>> @@ -134,7 +134,7 @@ static const struct hantro_fmt imx8m_vpu_dec_fmts[] = {
>>
>> static const struct hantro_fmt imx8m_vpu_g2_dec_fmts[] = {
>> {
>> - .fourcc = V4L2_PIX_FMT_NV12,
>> + .fourcc = V4L2_PIX_FMT_NV12_4L4,
>
> This depends on some accepted patches from Ezequiel. I don't recall seeing a
> mention of this in the cover, this is not a problem per see, but perhaps nice
> for the testers. I believe only 76180 is needed, but here's the complete series
> I refer to:
>
> 76178 Accepted [v3,1/4] media: Rename V4L2_PIX_FMT_SUNXI_TILED_NV12 to V4L2_PIX_FMT_NV12_32L32
> 76179 Accepted [v3,2/4] media: Rename V4L2_PIX_FMT_HM12 to V4L2_PIX_FMT_NV12_16L16
> 76180 Accepted [v3,3/4] media: Add NV12_4L4 tiled format
> 76181 Accepted [v3,4/4] media: Clean V4L2_PIX_FMT_NV12MT documentation
>
>
>> .codec_mode = HANTRO_MODE_NONE,
>> },
>> {
>
>


It was mentioned in the cover letter:

"The series depends on the YUV tiled format support prepared by Ezequiel:
https://www.spinics.net/lists/linux-media/msg197047.html"

Anyway, thanks for clarifying this.

Regards,

Andrzej

\
 
 \ /
  Last update: 2021-09-28 17:23    [W:0.064 / U:1.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site