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[PATCH v4 4/4] [media] s5p-mfc: Check and set 'v4l2_pix_format:field' field in try_fmt

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  [PATCH v4 4/4] [media] s5p-mfc: Check and set 'v4l2_pix_format:field' field in try_fmt Thibault Saunier <thibault.saunier@osg.samsung.com> - 2017-02-13 20:10 +0100
    Re: [PATCH v4 4/4] [media] s5p-mfc: Check and set  'v4l2_pix_format:field' field in try_fmt Andrzej Hajda <a.hajda@samsung.com> - 2017-02-21 11:20 +0100

#1580005 — [PATCH v4 4/4] [media] s5p-mfc: Check and set 'v4l2_pix_format:field' field in try_fmt

It is required by the standard that the field order is set by the
driver.

Signed-off-by: Thibault Saunier <thibault.saunier@osg.samsung.com>

---

Changes in v4: None
Changes in v3:
- Do not check values in the g_fmt functions as Andrzej explained in previous review

Changes in v2:
- Fix a silly build error that slipped in while rebasing the patches

 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 0976c3e0a5ce..c954b34cb988 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -385,6 +385,20 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
 	struct s5p_mfc_dev *dev = video_drvdata(file);
 	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 	struct s5p_mfc_fmt *fmt;
+	enum v4l2_field field;
+
+	field = f->fmt.pix.field;
+	if (field == V4L2_FIELD_ANY) {
+		field = V4L2_FIELD_NONE;
+	} else if (field != V4L2_FIELD_NONE) {
+		mfc_debug(2, "Not supported field order(%d)\n", pix_mp->field);
+		return -EINVAL;
+	}
+
+	/* V4L2 specification suggests the driver corrects the format struct
+	 * if any of the dimensions is unsupported
+	 */
+	f->fmt.pix.field = field;
 
 	mfc_debug(2, "Type is %d\n", f->type);
 	if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
-- 
2.11.1

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#1585184 — Re: [PATCH v4 4/4] [media] s5p-mfc: Check and set 'v4l2_pix_format:field' field in try_fmt

On 13.02.2017 20:08, Thibault Saunier wrote:
> It is required by the standard that the field order is set by the
> driver.
>
> Signed-off-by: Thibault Saunier <thibault.saunier@osg.samsung.com>
>
> ---
>
> Changes in v4: None
> Changes in v3:
> - Do not check values in the g_fmt functions as Andrzej explained in previous review
>
> Changes in v2:
> - Fix a silly build error that slipped in while rebasing the patches
>
>  drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> index 0976c3e0a5ce..c954b34cb988 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> @@ -385,6 +385,20 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
>  	struct s5p_mfc_dev *dev = video_drvdata(file);
>  	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
>  	struct s5p_mfc_fmt *fmt;
> +	enum v4l2_field field;
> +
> +	field = f->fmt.pix.field;
> +	if (field == V4L2_FIELD_ANY) {
> +		field = V4L2_FIELD_NONE;
> +	} else if (field != V4L2_FIELD_NONE) {
> +		mfc_debug(2, "Not supported field order(%d)\n", pix_mp->field);
> +		return -EINVAL;
> +	}
> +
> +	/* V4L2 specification suggests the driver corrects the format struct
> +	 * if any of the dimensions is unsupported
> +	 */
> +	f->fmt.pix.field = field;

It looks like you missed my previous comment.
--
Regards
Andrzej

>  
>  	mfc_debug(2, "Type is %d\n", f->type);
>  	if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {

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