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    Subject[PATCH v3 7/9] media: subdev: Support privacy led in v4l2_subdev_enable/disable_streams()
    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@ideasonboard.com>
    ---
    drivers/media/v4l2-core/v4l2-subdev.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
    index 20b5a00cbeeb..f44aaa4e1fab 100644
    --- a/drivers/media/v4l2-core/v4l2-subdev.c
    +++ b/drivers/media/v4l2-core/v4l2-subdev.c
    @@ -2150,6 +2150,7 @@ 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;
    @@ -2198,6 +2199,8 @@ 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);
    +
    /* Call the .enable_streams() operation. */
    ret = v4l2_subdev_call(sd, pad, enable_streams, state, pad,
    streams_mask);
    @@ -2216,6 +2219,9 @@ int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad,
    cfg->enabled = true;
    }

    + if (!already_streaming)
    + v4l2_subdev_enable_privacy_led(sd);
    +
    done:
    v4l2_subdev_unlock_state(state);

    @@ -2340,6 +2346,9 @@ 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;
    --
    2.34.1


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