Re: [PATCH v1 5/9] media: verisilicon: Compute motion vectors size for AV1 frames

[Nicolas Dufresne]

Le lundi 19 décembre 2022 à 16:56 +0100, Benjamin Gaignard a écrit :
> Compute the additional required to store motion vectors at

requires *space*, requires *buffer* ? I think this is missing a word.

> the end of the frames buffers.
> 
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
> ---
>  drivers/media/platform/verisilicon/hantro_hw.h      | 13 +++++++++++++
>  .../media/platform/verisilicon/hantro_postproc.c    |  3 +++
>  drivers/media/platform/verisilicon/hantro_v4l2.c    |  5 +++++
>  3 files changed, 21 insertions(+)
> 
> diff --git a/drivers/media/platform/verisilicon/hantro_hw.h b/drivers/media/platform/verisilicon/hantro_hw.h
> index e83f0c523a30..8b3bc7e31395 100644
> --- a/drivers/media/platform/verisilicon/hantro_hw.h
> +++ b/drivers/media/platform/verisilicon/hantro_hw.h
> @@ -417,6 +417,19 @@ hantro_hevc_mv_size(unsigned int width, unsigned int height)
>  	return width * height / 16;
>  }
>  
> +static inline unsigned short hantro_av1_num_sbs(unsigned short dimension)
> +{
> +	return DIV_ROUND_UP(dimension, 64) + 1;

Why plus one ? I've tested locally with the logical DIV_ROUND_UP(dimension, 64),
and didn't see any difference. It then match hantro_vp_num_sbs(), so can't this
be shared ?

> +}
> +
> +static inline size_t
> +hantro_av1_mv_size(unsigned int width, unsigned int height)
> +{
> +	size_t num_sbs = hantro_av1_num_sbs(width) * hantro_av1_num_sbs(height);
> +
> +	return ALIGN(num_sbs * 384, 16) + 512;

Shall the magic numbers be turned into defines ?

> +}
> +
>  int hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx);
>  int rockchip_vpu2_mpeg2_dec_run(struct hantro_ctx *ctx);
>  void hantro_mpeg2_dec_copy_qtable(u8 *qtable,
> diff --git a/drivers/media/platform/verisilicon/hantro_postproc.c b/drivers/media/platform/verisilicon/hantro_postproc.c
> index 09d8cf942689..7dc39519a2ee 100644
> --- a/drivers/media/platform/verisilicon/hantro_postproc.c
> +++ b/drivers/media/platform/verisilicon/hantro_postproc.c
> @@ -213,6 +213,9 @@ int hantro_postproc_alloc(struct hantro_ctx *ctx)
>  	else if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_HEVC_SLICE)
>  		buf_size += hantro_hevc_mv_size(pix_mp.width,
>  						pix_mp.height);
> +	else if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_AV1_FRAME)
> +		buf_size += hantro_av1_mv_size(pix_mp.width,
> +					       pix_mp.height);

nit: Time to turn into a switch or use an ops ?

>  
>  	for (i = 0; i < num_buffers; ++i) {
>  		struct hantro_aux_buf *priv = &ctx->postproc.dec_q[i];
> diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c
> index 2c7a805289e7..d41dcb108a6d 100644
> --- a/drivers/media/platform/verisilicon/hantro_v4l2.c
> +++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
> @@ -334,6 +334,11 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,
>  			pix_mp->plane_fmt[0].sizeimage +=
>  				hantro_hevc_mv_size(pix_mp->width,
>  						    pix_mp->height);
> +		else if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_AV1_FRAME &&
> +			 !hantro_needs_postproc(ctx, fmt))
> +			pix_mp->plane_fmt[0].sizeimage +=
> +				hantro_av1_mv_size(pix_mp->width,
> +						   pix_mp->height);
>  	} else if (!pix_mp->plane_fmt[0].sizeimage) {
>  		/*
>  		 * For coded formats the application can specify