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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241108-uvc-subdev-v2-4-85d8a051a3d3@chromium.org>
Date: Fri, 08 Nov 2024 20:25:48 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, 
 Yunke Cao <yunkec@...omium.org>, Hans Verkuil <hverkuil@...all.nl>, 
 Hans de Goede <hdegoede@...hat.com>, Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 4/6] media: uvcvideo: Create ancillary link for GPIO
 subdevice

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

Signed-off-by: Ricardo Ribalda <ribalda@...omium.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