linux-kernel - Re: [PATCH v3] vcodec: mediatek: Add g/s

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Date:	Thu, 4 Aug 2016 15:00:21 +0200
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Tiffany Lin <tiffany.lin@...iatek.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Pawel Osciak <posciak@...omium.org>
Cc:	Eddie Huang <eddie.huang@...iatek.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3] vcodec: mediatek: Add g/s_selection support for V4L2
 Encoder



On 08/04/2016 12:08 PM, Tiffany Lin wrote:
> This patch add g/s_selection support for MT8173 v4l2 encoder
> 
> Signed-off-by: Tiffany Lin <tiffany.lin@...iatek.com>
> ---
> v3:
> - add v4l2_s_selection to check constraint flags
> - remove visible_height modification in s_fmt_out

Is this selection-related, or is this an unrelated bug fix?
If it is the latter, then please split it up as a separate patch.

In both cases the commit log should explain a bit more why
this s_fmt_out change is needed.

> ---
>  drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c |   81 +++++++++++++++++---
>  1 file changed, 71 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> index 3ed3f2d..c4b8e00 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> @@ -487,7 +487,6 @@ static int vidioc_venc_s_fmt_out(struct file *file, void *priv,
>  	struct mtk_q_data *q_data;
>  	int ret, i;
>  	struct mtk_video_fmt *fmt;
> -	unsigned int pitch_w_div16;
>  	struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
>  
>  	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
> @@ -530,15 +529,6 @@ static int vidioc_venc_s_fmt_out(struct file *file, void *priv,
>  	q_data->coded_width = f->fmt.pix_mp.width;
>  	q_data->coded_height = f->fmt.pix_mp.height;
>  
> -	pitch_w_div16 = DIV_ROUND_UP(q_data->visible_width, 16);
> -	if (pitch_w_div16 % 8 != 0) {
> -		/* Adjust returned width/height, so application could correctly
> -		 * allocate hw required memory
> -		 */
> -		q_data->visible_height += 32;
> -		vidioc_try_fmt(f, q_data->fmt);
> -	}
> -
>  	q_data->field = f->fmt.pix_mp.field;
>  	ctx->colorspace = f->fmt.pix_mp.colorspace;
>  	ctx->ycbcr_enc = f->fmt.pix_mp.ycbcr_enc;
> @@ -631,6 +621,74 @@ static int vidioc_try_fmt_vid_out_mplane(struct file *file, void *priv,
>  	return vidioc_try_fmt(f, fmt);
>  }
>  
> +static int vidioc_venc_g_selection(struct file *file, void *priv,
> +				     struct v4l2_selection *s)
> +{
> +	struct mtk_vcodec_ctx *ctx = fh_to_ctx(priv);
> +	struct mtk_q_data *q_data;
> +
> +	if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
> +		return -EINVAL;
> +
> +	q_data = mtk_venc_get_q_data(ctx, s->type);
> +	if (!q_data)
> +		return -EINVAL;
> +
> +	switch (s->target) {
> +	case V4L2_SEL_TGT_CROP_DEFAULT:
> +	case V4L2_SEL_TGT_CROP_BOUNDS:
> +		s->r.top = 0;
> +		s->r.left = 0;
> +		s->r.width = q_data->coded_width;
> +		s->r.height = q_data->coded_height;
> +		break;
> +	case V4L2_SEL_TGT_CROP:
> +		s->r.top = 0;
> +		s->r.left = 0;
> +		s->r.width = q_data->visible_width;
> +		s->r.height = q_data->visible_height;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int vidioc_venc_s_selection(struct file *file, void *priv,
> +				     struct v4l2_selection *s)
> +{
> +	struct mtk_vcodec_ctx *ctx = fh_to_ctx(priv);
> +	struct mtk_q_data *q_data;
> +	struct v4l2_rect r = s->r;
> +	int err;
> +
> +	if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
> +		return -EINVAL;
> +
> +	q_data = mtk_venc_get_q_data(ctx, s->type);
> +	if (!q_data)
> +		return -EINVAL;
> +
> +	switch (s->target) {
> +	case V4L2_SEL_TGT_CROP:
> +		/* Only support crop from (0,0) */
> +		s->r.top = 0;
> +		s->r.left = 0;
> +		r.width = min(r.width, q_data->coded_width);
> +		r.height = min(r.height, q_data->coded_height);
> +		err = v4l2_s_selection(s, &r);
> +		if (err)
> +			return err;
> +		q_data->visible_width = s->r.width;
> +		q_data->visible_height = s->r.height;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +	return 0;
> +}
> +
>  static int vidioc_venc_qbuf(struct file *file, void *priv,
>  			    struct v4l2_buffer *buf)
>  {
> @@ -689,6 +747,9 @@ const struct v4l2_ioctl_ops mtk_venc_ioctl_ops = {
>  
>  	.vidioc_create_bufs		= v4l2_m2m_ioctl_create_bufs,
>  	.vidioc_prepare_buf		= v4l2_m2m_ioctl_prepare_buf,
> +
> +	.vidioc_g_selection		= vidioc_venc_g_selection,
> +	.vidioc_s_selection		= vidioc_venc_s_selection,
>  };
>  
>  static int vb2ops_venc_queue_setup(struct vb2_queue *vq,
> 

The selection code looks good!

	Hans