linux-kernel - Re: [PATCH v4 2/2] media: verisilicon: HEVC: Only propose 10 bits compatible pixels formats

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Message-ID: <beb018218c6b0763ae15e28752f3292240f664c6.camel@collabora.com>
Date:   Thu, 26 Jan 2023 09:33:24 -0500
From:   Nicolas Dufresne <nicolas.dufresne@...labora.com>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        ezequiel@...guardiasur.com.ar, p.zabel@...gutronix.de,
        mchehab@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        hverkuil-cisco@...all.nl, nicolas.dufresne@...labora.co.uk
Cc:     linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kernel@...labora.com
Subject: Re: [PATCH v4 2/2] media: verisilicon: HEVC: Only propose 10 bits
 compatible pixels formats

Hi Benjamin,

Le mercredi 25 janvier 2023 à 18:27 +0100, Benjamin Gaignard a écrit :
> When decoding a 10bits bitstreams HEVC driver should only expose
> 10bits pixel formats.
> To fulfill this requirement it is needed to call hantro_reset_raw_fmt()
> when bit depth change and to correctly set match_depth in pixel formats
> enumeration.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> ---
> version 4:
> - Only set ctx->bit_depth when hantro_reset_raw_fmt() returns is ok.
> 
>  .../media/platform/verisilicon/hantro_drv.c   | 46 +++++++++++++++----
>  .../media/platform/verisilicon/imx8m_vpu_hw.c |  2 +
>  2 files changed, 40 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/media/platform/verisilicon/hantro_drv.c b/drivers/media/platform/verisilicon/hantro_drv.c
> index 8cb4a68c9119..30abab7ac9bf 100644
> --- a/drivers/media/platform/verisilicon/hantro_drv.c
> +++ b/drivers/media/platform/verisilicon/hantro_drv.c
> @@ -251,11 +251,6 @@ queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
>  
>  static int hantro_try_ctrl(struct v4l2_ctrl *ctrl)
>  {
> -	struct hantro_ctx *ctx;
> -
> -	ctx = container_of(ctrl->handler,
> -			   struct hantro_ctx, ctrl_handler);
> -
>  	if (ctrl->id == V4L2_CID_STATELESS_H264_SPS) {
>  		const struct v4l2_ctrl_h264_sps *sps = ctrl->p_new.p_h264_sps;
>  
> @@ -274,8 +269,6 @@ static int hantro_try_ctrl(struct v4l2_ctrl *ctrl)
>  		if (sps->bit_depth_luma_minus8 != 0 && sps->bit_depth_luma_minus8 != 2)
>  			/* Only 8-bit and 10-bit are supported */
>  			return -EINVAL;
> -
> -		ctx->bit_depth = sps->bit_depth_luma_minus8 + 8;
>  	} else if (ctrl->id == V4L2_CID_STATELESS_VP9_FRAME) {
>  		const struct v4l2_ctrl_vp9_frame *dec_params = ctrl->p_new.p_vp9_frame;
>  
> @@ -286,6 +279,38 @@ static int hantro_try_ctrl(struct v4l2_ctrl *ctrl)
>  	return 0;
>  }
>  
> +static int hantro_hevc_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +	struct hantro_ctx *ctx;
> +
> +	ctx = container_of(ctrl->handler,
> +			   struct hantro_ctx, ctrl_handler);
> +
> +	vpu_debug(1, "s_ctrl: id = %d, val = %d\n", ctrl->id, ctrl->val);

This trace feels redundant with the v4l2 core traces, mind dropping it ?

Other then that, the patch looks good to me, but should have included a Fixes
tag for backport purposes. Could it be ?

Fixes: dc39473d0340 ("media: hantro: imx8m: Enable 10bit decoding")

With that adjusted:

Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

> +
> +	switch (ctrl->id) {
> +	case V4L2_CID_STATELESS_HEVC_SPS:
> +	{
> +		const struct v4l2_ctrl_hevc_sps *sps = ctrl->p_new.p_hevc_sps;
> +		int bit_depth = sps->bit_depth_luma_minus8 + 8;
> +		int ret;
> +
> +		if (ctx->bit_depth == bit_depth)
> +			return 0;
> +
> +		ret = hantro_reset_raw_fmt(ctx, bit_depth);
> +		if (!ret)
> +			ctx->bit_depth = bit_depth;
> +
> +		return ret;
> +	}
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
>  static int hantro_jpeg_s_ctrl(struct v4l2_ctrl *ctrl)
>  {
>  	struct hantro_ctx *ctx;
> @@ -328,6 +353,11 @@ static const struct v4l2_ctrl_ops hantro_ctrl_ops = {
>  	.try_ctrl = hantro_try_ctrl,
>  };
>  
> +static const struct v4l2_ctrl_ops hantro_hevc_ctrl_ops = {
> +	.s_ctrl = hantro_hevc_s_ctrl,
> +	.try_ctrl = hantro_try_ctrl,
> +};
> +
>  static const struct v4l2_ctrl_ops hantro_jpeg_ctrl_ops = {
>  	.s_ctrl = hantro_jpeg_s_ctrl,
>  };
> @@ -470,7 +500,7 @@ static const struct hantro_ctrl controls[] = {
>  		.codec = HANTRO_HEVC_DECODER,
>  		.cfg = {
>  			.id = V4L2_CID_STATELESS_HEVC_SPS,
> -			.ops = &hantro_ctrl_ops,
> +			.ops = &hantro_hevc_ctrl_ops,
>  		},
>  	}, {
>  		.codec = HANTRO_HEVC_DECODER,
> diff --git a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c
> index b390228fd3b4..f850d8bddef6 100644
> --- a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c
> +++ b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c
> @@ -152,6 +152,7 @@ static const struct hantro_fmt imx8m_vpu_g2_postproc_fmts[] = {
>  	{
>  		.fourcc = V4L2_PIX_FMT_NV12,
>  		.codec_mode = HANTRO_MODE_NONE,
> +		.match_depth = true,
>  		.postprocessed = true,
>  		.frmsize = {
>  			.min_width = FMT_MIN_WIDTH,
> @@ -165,6 +166,7 @@ static const struct hantro_fmt imx8m_vpu_g2_postproc_fmts[] = {
>  	{
>  		.fourcc = V4L2_PIX_FMT_P010,
>  		.codec_mode = HANTRO_MODE_NONE,
> +		.match_depth = true,
>  		.postprocessed = true,
>  		.frmsize = {
>  			.min_width = FMT_MIN_WIDTH,