Hi Jacpop,
Thanks for your work.
On 2024-04-30 12:39:53 +0200, Jacopo Mondi wrote:
> Store the format in the subdevice state. Disallow setting format
> on the source pads, as formats are set on the sink pad streams and
> propagated to the source streams.
>
> Now that the driver doesn't store the active format in the
> driver-specific structure, also remove the mutex and use the lock
> associated with the state.
Can't this whole patch be broken out to an independent patch and
upstreamed already independent from the streams work?
>
> Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/platform/renesas/rcar-csi2.c | 54 +++++++---------------
> 1 file changed, 16 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
> index ffb73272543b..ed818a6fa655 100644
> --- a/drivers/media/platform/renesas/rcar-csi2.c
> +++ b/drivers/media/platform/renesas/rcar-csi2.c
> @@ -621,8 +621,6 @@ struct rcar_csi2 {
>
> int channel_vc[4];
>
> - struct mutex lock; /* Protects mf and stream_count. */
> - struct v4l2_mbus_framefmt mf;
> int stream_count;
>
> bool cphy;
> @@ -1263,43 +1261,28 @@ static int rcsi2_s_stream(struct v4l2_subdev *sd, int enable)
> }
>
> static int rcsi2_set_pad_format(struct v4l2_subdev *sd,
> - struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_state *state,
> struct v4l2_subdev_format *format)
> {
> - struct rcar_csi2 *priv = sd_to_csi2(sd);
> - struct v4l2_mbus_framefmt *framefmt;
> + struct v4l2_mbus_framefmt *fmt;
>
> - mutex_lock(&priv->lock);
> + /*
> + * Format is propagated from sink streams to source streams, so
> + * disallow setting format on the source pads.
> + */
> + if (format->pad > RCAR_CSI2_SINK)
> + return -EINVAL;
>
> if (!rcsi2_code_to_fmt(format->format.code))
> format->format.code = rcar_csi2_formats[0].code;
>
> - if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
> - priv->mf = format->format;
> - } else {
> - framefmt = v4l2_subdev_state_get_format(sd_state, 0);
> - *framefmt = format->format;
> - }
>
> - mutex_unlock(&priv->lock);
> + fmt = v4l2_subdev_state_get_format(state, format->pad, format->stream);
> + *fmt = format->format;
>
> - return 0;
> -}
> -
> -static int rcsi2_get_pad_format(struct v4l2_subdev *sd,
> - struct v4l2_subdev_state *sd_state,
> - struct v4l2_subdev_format *format)
> -{
> - struct rcar_csi2 *priv = sd_to_csi2(sd);
> -
> - mutex_lock(&priv->lock);
> -
> - if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
> - format->format = priv->mf;
> - else
> - format->format = *v4l2_subdev_state_get_format(sd_state, 0);
> -
> - mutex_unlock(&priv->lock);
> + fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
> + format->stream);
> + *fmt = format->format;
>
> return 0;
> }
> @@ -1310,7 +1293,7 @@ static const struct v4l2_subdev_video_ops rcar_csi2_video_ops = {
>
> static const struct v4l2_subdev_pad_ops rcar_csi2_pad_ops = {
> .set_fmt = rcsi2_set_pad_format,
> - .get_fmt = rcsi2_get_pad_format,
> + .get_fmt = v4l2_subdev_get_fmt,
> };
>
> static const struct v4l2_subdev_ops rcar_csi2_subdev_ops = {
> @@ -2031,20 +2014,19 @@ static int rcsi2_probe(struct platform_device *pdev)
>
> priv->dev = &pdev->dev;
>
> - mutex_init(&priv->lock);
> priv->stream_count = 0;
>
> ret = rcsi2_probe_resources(priv, pdev);
> if (ret) {
> dev_err(priv->dev, "Failed to get resources\n");
> - goto error_mutex;
> + return ret;
> }
>
> platform_set_drvdata(pdev, priv);
>
> ret = rcsi2_parse_dt(priv);
> if (ret)
> - goto error_mutex;
> + return ret;
>
> priv->subdev.owner = THIS_MODULE;
> priv->subdev.dev = &pdev->dev;
> @@ -2094,8 +2076,6 @@ static int rcsi2_probe(struct platform_device *pdev)
> error_async:
> v4l2_async_nf_unregister(&priv->notifier);
> v4l2_async_nf_cleanup(&priv->notifier);
> -error_mutex:
> - mutex_destroy(&priv->lock);
>
> return ret;
> }
> @@ -2110,8 +2090,6 @@ static void rcsi2_remove(struct platform_device *pdev)
> v4l2_subdev_cleanup(&priv->subdev);
>
> pm_runtime_disable(&pdev->dev);
> -
> - mutex_destroy(&priv->lock);
> }
>
> static struct platform_driver rcar_csi2_pdrv = {
> --
> 2.44.0
>
--
Kind Regards,
Niklas Söderlund
