[PATCH v2 4/6] media: uvcvideo: Create ancillary link for GPIO subdevice

Ricardo Ribalda
2024-11-08T20:25:56Z

Make an ancillary device between the streaming subdevice and the GPIO
subdevice.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
drivers/media/usb/uvc/uvc_entity.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c
index c1b69f9eaa56..dad77b96fe16 100644
--- a/drivers/media/usb/uvc/uvc_entity.c
+++ b/drivers/media/usb/uvc/uvc_entity.c
@@ -53,6 +53,16 @@ static int uvc_mc_create_links(struct uvc_video_chain *chain,
return ret;
}

+ /* Create ancillary link for the GPIO. */
+ if (chain->dev->gpio_unit && UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) {
+ struct media_link *link;
+
+ link = media_create_ancillary_link(sink,
+ &chain->dev->gpio_unit->subdev.entity);
+ if (IS_ERR(link))
+ return PTR_ERR(link);
+ }
+
return 0;
}

--
2.47.0.277.g8800431eea-goog