Hi Tomi,
Thank you for the patch.
On Wed, Apr 10, 2024 at 03:35:53PM +0300, Tomi Valkeinen wrote:
> Add a helper function which returns whether the subdevice is streaming,
> i.e. if .s_stream or .enable_streams has been called successfully.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-subdev.c | 25 +++++++++++++++++++++++++
> include/media/v4l2-subdev.h | 13 +++++++++++++
> 2 files changed, 38 insertions(+)
>
> diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
> index 3d2c9c224b8f..20b5a00cbeeb 100644
> --- a/drivers/media/v4l2-core/v4l2-subdev.c
> +++ b/drivers/media/v4l2-core/v4l2-subdev.c
> @@ -2419,6 +2419,31 @@ void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
> }
> EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);
>
> +bool v4l2_subdev_is_streaming(struct v4l2_subdev *sd)
> +{
> + struct v4l2_subdev_state *state;
> +
> + if (!v4l2_subdev_has_op(sd, pad, enable_streams))
> + return sd->streaming_enabled;
> +
> + state = v4l2_subdev_get_locked_active_state(sd);
> +
> + if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS))
> + return !!sd->enabled_pads;
I think this can be moved above the
v4l2_subdev_get_locked_active_state() call.
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Any plan to convert drivers to this ?
> +
> + for (unsigned int i = 0; i < state->stream_configs.num_configs; ++i) {
> + const struct v4l2_subdev_stream_config *cfg;
> +
> + cfg = &state->stream_configs.configs[i];
> +
> + if (cfg->enabled)
> + return true;
> + }
> +
> + return false;
> +}
> +EXPORT_SYMBOL_GPL(v4l2_subdev_is_streaming);
> +
> int v4l2_subdev_get_privacy_led(struct v4l2_subdev *sd)
> {
> #if IS_REACHABLE(CONFIG_LEDS_CLASS)
> diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
> index d6867511e9cf..270a4dfa5663 100644
> --- a/include/media/v4l2-subdev.h
> +++ b/include/media/v4l2-subdev.h
> @@ -1914,4 +1914,17 @@ extern const struct v4l2_subdev_ops v4l2_subdev_call_wrappers;
> void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
> const struct v4l2_event *ev);
>
> +/**
> + * v4l2_subdev_is_streaming() - Returns if the subdevice is streaming
> + * @sd: The subdevice
> + *
> + * v4l2_subdev_is_streaming() tells if the subdevice is currently streaming.
> + * "Streaming" here means whether .s_stream() or .enable_streams() has been
> + * successfully called, and the streaming has not yet been disabled.
> + *
> + * If the subdevice implements .enable_streams() this function must be called
> + * while holding the active state lock.
> + */
> +bool v4l2_subdev_is_streaming(struct v4l2_subdev *sd);
> +
> #endif /* _V4L2_SUBDEV_H */
>
--
Regards,
Laurent Pinchart
