[PATCH v2 5/6] media: v4l2-core: Add new MEDIA_ENT_F_GPIO

[Ricardo Ribalda <ribalda@chromium.org>]

Add a new media entity type to define a GPIO entity. This can be used to
represent the privacy switch GPIO associated to a sensor.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 Documentation/userspace-api/media/mediactl/media-types.rst | 4 ++++
 drivers/media/v4l2-core/v4l2-async.c                       | 3 ++-
 include/uapi/linux/media.h                                 | 1 +
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/userspace-api/media/mediactl/media-types.rst b/Documentation/userspace-api/media/mediactl/media-types.rst
index 6332e8395263..7ede3954a96a 100644
--- a/Documentation/userspace-api/media/mediactl/media-types.rst
+++ b/Documentation/userspace-api/media/mediactl/media-types.rst
@@ -24,6 +24,7 @@ Types and flags used to represent the media graph elements
 .. _MEDIA-ENT-F-CAM-SENSOR:
 .. _MEDIA-ENT-F-FLASH:
 .. _MEDIA-ENT-F-LENS:
+.. _MEDIA-ENT-F-GPIO:
 .. _MEDIA-ENT-F-ATV-DECODER:
 .. _MEDIA-ENT-F-TUNER:
 .. _MEDIA-ENT-F-IF-VID-DECODER:
@@ -100,6 +101,9 @@ Types and flags used to represent the media graph elements
     *  -  ``MEDIA_ENT_F_LENS``
        -  Lens controller entity.
 
+    *  -  ``MEDIA_ENT_F_GPIO``
+       -  GPIO controller entity.
+
     *  -  ``MEDIA_ENT_F_ATV_DECODER``
        -  Analog video decoder, the basic function of the video decoder is
 	  to accept analogue video from a wide variety of sources such as
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index ee884a8221fb..8a902fc897d1 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -320,7 +320,8 @@ static int v4l2_async_create_ancillary_links(struct v4l2_async_notifier *n,
 	struct media_link *link;
 
 	if (sd->entity.function != MEDIA_ENT_F_LENS &&
-	    sd->entity.function != MEDIA_ENT_F_FLASH)
+	    sd->entity.function != MEDIA_ENT_F_FLASH &&
+	    sd->entity.function != MEDIA_ENT_F_GPIO)
 		return 0;
 
 	if (!n->sd) {
diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
index 1c80b1d6bbaf..d3d045e52d78 100644
--- a/include/uapi/linux/media.h
+++ b/include/uapi/linux/media.h
@@ -84,6 +84,7 @@ struct media_device_info {
 #define MEDIA_ENT_F_CAM_SENSOR			(MEDIA_ENT_F_OLD_SUBDEV_BASE + 1)
 #define MEDIA_ENT_F_FLASH			(MEDIA_ENT_F_OLD_SUBDEV_BASE + 2)
 #define MEDIA_ENT_F_LENS			(MEDIA_ENT_F_OLD_SUBDEV_BASE + 3)
+#define MEDIA_ENT_F_GPIO			(MEDIA_ENT_F_OLD_SUBDEV_BASE + 6)
 
 /*
  * Digital TV, analog TV, radio and/or software defined radio tuner functions.

-- 
2.47.0.277.g8800431eea-goog