linux-kernel - Re: [PATCH 07/10] media: mtk-vcodec: venc: remove redundant code

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Date:   Fri, 19 Jun 2020 14:59:12 +0800
From:   Tiffany Lin <tiffany.lin@...iatek.com>
To:     Alexandre Courbot <acourbot@...omium.org>
CC:     Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Rui Wang <gtk_ruiwang@...iatek.com>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        "Pi-Hsun Shih" <pihsun@...omium.org>,
        Maoguang Meng <maoguang.meng@...iatek.com>,
        <linux-media@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 07/10] media: mtk-vcodec: venc: remove redundant code

On Wed, 2020-05-20 at 17:27 +0900, Alexandre Courbot wrote:
> vidioc_try_fmt() does clamp height and width when called on the OUTPUT
> queue, so clamping them prior to calling this function is redundant. Set
> the queue's parameters after calling vidioc_try_fmt() so we can use the
> values it computed.
> 

vidioc_try_fmt clamps height and width only when f->type ==
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE

Does this cleanup pass v4l2 compliance test?
I recall compliance test will try different fmt and make sure driver
response enough information?


> Signed-off-by: Alexandre Courbot <acourbot@...omium.org>
> ---
>  .../media/platform/mtk-vcodec/mtk_vcodec_enc.c   | 16 ++++------------
>  1 file changed, 4 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> index 05743a745a11..f0af78f112db 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> @@ -449,7 +449,6 @@ static int vidioc_venc_s_fmt_out(struct file *file, void *priv,
>  	struct mtk_q_data *q_data;
>  	int ret, i;
>  	const struct mtk_video_fmt *fmt;
> -	struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
>  
>  	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
>  	if (!vq) {
> @@ -474,20 +473,13 @@ static int vidioc_venc_s_fmt_out(struct file *file, void *priv,
>  		f->fmt.pix.pixelformat = fmt->fourcc;
>  	}
>  
> -	pix_fmt_mp->height = clamp(pix_fmt_mp->height,
> -				MTK_VENC_MIN_H,
> -				MTK_VENC_MAX_H);
> -	pix_fmt_mp->width = clamp(pix_fmt_mp->width,
> -				MTK_VENC_MIN_W,
> -				MTK_VENC_MAX_W);
> -
> -	q_data->visible_width = f->fmt.pix_mp.width;
> -	q_data->visible_height = f->fmt.pix_mp.height;
> -	q_data->fmt = fmt;
> -	ret = vidioc_try_fmt(f, q_data->fmt);
> +	ret = vidioc_try_fmt(f, fmt);
>  	if (ret)
>  		return ret;
>  
> +	q_data->fmt = fmt;
> +	q_data->visible_width = f->fmt.pix_mp.width;
> +	q_data->visible_height = f->fmt.pix_mp.height;
>  	q_data->coded_width = f->fmt.pix_mp.width;
>  	q_data->coded_height = f->fmt.pix_mp.height;
>