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media: v4l2-core: Make the v4l2-core code enable/disable the privacy LED if present

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Make v4l2_async_register_subdev_sensor() try to get a privacy LED
associated with the sensor and extend the call_s_stream() wrapper to
enable/disable the privacy LED if found.

This makes the core handle privacy LED control, rather then having to
duplicate this code in all the sensor drivers.

Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://lore.kernel.org/r/20230127203729.10205-2-hdegoede@redhat.com
This commit is contained in:
Hans de Goede
2023-01-27 21:37:25 +01:00
parent 39f0932050
commit b6e10ff6c2
5 changed files with 75 additions and 0 deletions
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4
include/media/v4l2-subdev.h
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@@ -38,6 +38,7 @@ struct v4l2_subdev;
struct v4l2_subdev_fh;
struct tuner_setup;
struct v4l2_mbus_frame_desc;
struct led_classdev;
/**
* struct v4l2_decode_vbi_line - used to decode_vbi_line
@@ -941,6 +942,7 @@ struct v4l2_subdev_platform_data {
* @state_lock: A pointer to a lock used for all the subdev's states, set by the
* driver. This is optional. If NULL, each state instance will get
* a lock of its own.
* @privacy_led: Optional pointer to a LED classdev for the privacy LED for sensors.
* @active_state: Active state for the subdev (NULL for subdevs tracking the
* state internally). Initialized by calling
* v4l2_subdev_init_finalize().
@@ -982,6 +984,8 @@ struct v4l2_subdev {
* appropriate functions.
*/
struct led_classdev *privacy_led;
/*
* TODO: active_state should most likely be changed from a pointer to an
* embedded field. For the time being it's kept as a pointer to more