linux-kernel - [PATCH v3 02/12] media: uvcvideo: Set a function for UVC_EXT_GPIO

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Message-Id: <20250926-uvc-orientation-v3-2-6dc2fa5b4220@chromium.org>
Date: Fri, 26 Sep 2025 13:11:26 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Hans de Goede <hansg@...nel.org>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, 
 Robert Moore <robert.moore@...el.com>, Hans Verkuil <hverkuil@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-usb@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-gpio@...r.kernel.org, linux-acpi@...r.kernel.org, 
 acpica-devel@...ts.linux.dev, Ricardo Ribalda <ribalda@...omium.org>, 
 stable@...r.kernel.org
Subject: [PATCH v3 02/12] media: uvcvideo: Set a function for
 UVC_EXT_GPIO_UNIT

All media entities need a proper function. Otherwise a warning is shown
in dmesg:
uvcvideo 1-1:1.0: Entity type for entity GPIO was not initialized!

Please note that changes in virtual entities will not be considered a
uAPI change.

Cc: stable@...r.kernel.org
Fixes: 2886477ff987 ("media: uvcvideo: Implement UVC_EXT_GPIO_UNIT")
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/usb/uvc/uvc_entity.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c
index 3823ac9c8045b3ad8530372fd38983aaafbd775d..ee1007add243036f68b7014ca621813e461fa73d 100644
--- a/drivers/media/usb/uvc/uvc_entity.c
+++ b/drivers/media/usb/uvc/uvc_entity.c
@@ -85,6 +85,7 @@ static int uvc_mc_init_entity(struct uvc_video_chain *chain,
 			break;
 		case UVC_VC_PROCESSING_UNIT:
 		case UVC_VC_EXTENSION_UNIT:
+		case UVC_EXT_GPIO_UNIT:
 			/* For lack of a better option. */
 			function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
 			break;
@@ -105,7 +106,6 @@ static int uvc_mc_init_entity(struct uvc_video_chain *chain,
 		case UVC_OTT_DISPLAY:
 		case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
 		case UVC_EXTERNAL_VENDOR_SPECIFIC:
-		case UVC_EXT_GPIO_UNIT:
 		default:
 			function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
 			break;

-- 
2.51.0.536.g15c5d4f767-goog