On 05/20/2015 06:39 PM, William Towle wrote:
> From: Rob Taylor <rob.tay...@codethink.co.uk>
>
> Fix rcar_vin_try_fmt to use the correct pad number when calling the
> subdev set_fmt. Previously pad number 0 was always used, resulting in
> EINVAL if the subdev cares about the pad number (e.g. ADV7612).
>
> Signed-off-by: William Towle Taylor <rob.tay...@codethink.co.uk>
> Reviewed-by: Rob Taylor <rob.tay...@codethink.co.uk>
> ---
> drivers/media/platform/soc_camera/rcar_vin.c | 29
> +++++++++++++++++---------
> 1 file changed, 19 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/media/platform/soc_camera/rcar_vin.c
> b/drivers/media/platform/soc_camera/rcar_vin.c
> index b4e9b43..571ab20 100644
> --- a/drivers/media/platform/soc_camera/rcar_vin.c
> +++ b/drivers/media/platform/soc_camera/rcar_vin.c
> @@ -1707,12 +1707,13 @@ static int rcar_vin_try_fmt(struct soc_camera_device
> *icd,
> const struct soc_camera_format_xlate *xlate;
> struct v4l2_pix_format *pix = &f->fmt.pix;
> struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
> - struct v4l2_subdev_pad_config pad_cfg;
> + struct v4l2_subdev_pad_config pad_cfg[sd->entity.num_pads];
Same problem: this relies on the presence of CONFIG_MEDIA_CONTROLLER.
This array can also get large which is bad when it is on the stack.
Laurent, I remember that you had plans to add an op that would allocate
and initialize this for you. Any progress on that?
Regards,
Hans
> struct v4l2_subdev_format format = {
> .which = V4L2_SUBDEV_FORMAT_TRY,
> };
> struct v4l2_mbus_framefmt *mf = &format.format;
> __u32 pixfmt = pix->pixelformat;
> + struct media_pad *remote_pad;
> int width, height;
> int ret;
>
> @@ -1744,17 +1745,24 @@ static int rcar_vin_try_fmt(struct soc_camera_device
> *icd,
> mf->code = xlate->code;
> mf->colorspace = pix->colorspace;
>
> - ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
> - pad, set_fmt, &pad_cfg, &format);
> + remote_pad = media_entity_remote_pad(
> + &icd->vdev->entity.pads[0]);
> + format.pad = remote_pad->index;
> +
> + ret = v4l2_device_call_until_err(sd->v4l2_dev,
> + soc_camera_grp_id(icd), pad,
> + set_fmt, pad_cfg,
> + &format);
> if (ret < 0)
> return ret;
>
> - /* Adjust only if VIN cannot scale */
> - if (pix->width > mf->width * 2)
> - pix->width = mf->width * 2;
> - if (pix->height > mf->height * 3)
> - pix->height = mf->height * 3;
> -
> + /* In case the driver has adjusted 'fmt' to match the
> + * resolution of the live stream, 'pix' needs to pass this
> + * change out so that the buffer userland creates for the
> + * captured image/video has these dimensions
> + */
> + pix->width = mf->width;
> + pix->height = mf->height;
> pix->field = mf->field;
> pix->colorspace = mf->colorspace;
>
> @@ -1769,9 +1777,10 @@ static int rcar_vin_try_fmt(struct soc_camera_device
> *icd,
> */
> mf->width = VIN_MAX_WIDTH;
> mf->height = VIN_MAX_HEIGHT;
> + format.pad = remote_pad->index;
> ret = v4l2_device_call_until_err(sd->v4l2_dev,
> soc_camera_grp_id(icd),
> - pad, set_fmt, &pad_cfg,
> + pad, set_fmt, pad_cfg,
> &format);
> if (ret < 0) {
> dev_err(icd->parent,
>
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