Moi,
On Fri, Apr 05, 2024 at 12:14:25PM +0300, Tomi Valkeinen wrote:
> We support camera privacy leds with the .s_stream, in call_s_stream, but
> we don't have that support when the subdevice implements
> .enable/disable_streams.
>
> Add the support by enabling the led when the first stream for a
> subdevice is enabled, and disabling the led then the last stream is
> disabled.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-subdev.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
> index b4981447961a..015f2fb423c9 100644
> --- a/drivers/media/v4l2-core/v4l2-subdev.c
> +++ b/drivers/media/v4l2-core/v4l2-subdev.c
> @@ -2149,6 +2149,7 @@ int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad,
> {
> struct device *dev = sd->entity.graph_obj.mdev->dev;
> struct v4l2_subdev_state *state;
> + bool already_streaming;
> u64 found_streams = 0;
> unsigned int i;
> int ret;
> @@ -2197,6 +2198,11 @@ int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad,
>
> dev_dbg(dev, "enable streams %u:%#llx\n", pad, streams_mask);
>
> + already_streaming = v4l2_subdev_is_streaming(sd);
> +
> + if (!already_streaming)
> + v4l2_subdev_enable_privacy_led(sd);
> +
> /* Call the .enable_streams() operation. */
> ret = v4l2_subdev_call(sd, pad, enable_streams, state, pad,
> streams_mask);
> @@ -2216,6 +2222,9 @@ int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad,
> }
>
> done:
> + if (ret && !already_streaming)
> + v4l2_subdev_disable_privacy_led(sd);
I think you could also lit the LED only if enabling streaming succeeds.
> +
> v4l2_subdev_unlock_state(state);
>
> return ret;
> @@ -2339,6 +2348,9 @@ int v4l2_subdev_disable_streams(struct v4l2_subdev *sd, u32 pad,
> }
>
> done:
> + if (!v4l2_subdev_is_streaming(sd))
> + v4l2_subdev_disable_privacy_led(sd);
> +
> v4l2_subdev_unlock_state(state);
>
> return ret;
>
--
Terveisin,
Sakari Ailus
