On 09.02.2017 21:04, 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@xxxxxxxxxxxxxxx>
> ---
> drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 23 +++++++++++++++++++++--
> 1 file changed, 21 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> index 960d6c7052bd..309b0a1bbca5 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> @@ -345,7 +345,6 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
> rectangle. */
> pix_mp->width = ctx->buf_width;
> pix_mp->height = ctx->buf_height;
> - pix_mp->field = V4L2_FIELD_NONE;
> pix_mp->num_planes = 2;
> /* Set pixelformat to the format in which MFC
> outputs the decoded frame */
> @@ -369,7 +368,6 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
> so width and height have no meaning */
> pix_mp->width = 0;
> pix_mp->height = 0;
> - pix_mp->field = V4L2_FIELD_NONE;
> pix_mp->plane_fmt[0].bytesperline = ctx->dec_src_buf_size;
> pix_mp->plane_fmt[0].sizeimage = ctx->dec_src_buf_size;
> pix_mp->pixelformat = ctx->src_fmt->fourcc;
> @@ -379,6 +377,14 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
> mfc_debug(2, "%s-- with error\n", __func__);
> return -EINVAL;
> }
> +
> + if (pix_mp->field == V4L2_FIELD_ANY) {
> + pix_mp->field = V4L2_FIELD_NONE;
> + } else if (pix_mp->field != V4L2_FIELD_NONE) {
> + mfc_err("Not supported field order(%d)\n", pix_mp->field);
> + return -EINVAL;
> + }
> +
Again in g_fmt you should not check current value of the field.
> mfc_debug_leave();
> return 0;
> }
> @@ -389,6 +395,19 @@ 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 (V4L2_FIELD_NONE != field) {
> + 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;
According to docs [1], you should just adjust the field.
[1]:
http://hverkuil.home.xs4all.nl/spec/uapi/v4l/vidioc-g-fmt.html?highlight=g_fmt#c.VIDIOC_G_FMT
Regards
Andrzej
>
> mfc_debug(2, "Type is %d\n", f->type);
> if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
--
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