Le lundi 27 septembre 2021 à 17:19 +0200, Andrzej Pietrasiewicz a écrit :
> From: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxxx>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
> ---
> 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,
> },
> {
