Re: [PATCH v3] vcodec: mediatek: Add g/s_selection support for V4L2 Encoder

Hans Verkuil
2016-08-04T13:00:41Z

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@mediatek.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