linux-kernel - [PATCH] media: uvcvideo: Fix power line control for a Chicony camera

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Message-Id: <20230817-chicony-v1-1-76bde4d6ff6b@chromium.org>
Date:   Thu, 17 Aug 2023 12:38:04 +0000
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH] media: uvcvideo: Fix power line control for a Chicony
 camera

The device does not implement the control properly.

Fixes vl2-compliance error:

info: checking control 'Power Line Frequency' (0x00980918)
fail: v4l2-test-controls.cpp(552): could not set valid menu item 3

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
This camera, like other Chicony devices, do not implement properly the
Power Line Frequency control.

This time, I do not have direct access to the device, just to the
report, but since other devices from the same family are showing the
same error, it is safe to assume that the same fix will work here.
---
 drivers/media/usb/uvc/uvc_driver.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 08fcd2ffa727..db2556e95b72 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -2592,6 +2592,15 @@ static const struct usb_device_id uvc_ids[] = {
 	  .bInterfaceSubClass	= 1,
 	  .bInterfaceProtocol	= 0,
 	  .driver_info		= (kernel_ulong_t)&uvc_ctrl_power_line_limited },
+	/* Chicony Electronics Co., Ltd */
+	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
+				| USB_DEVICE_ID_MATCH_INT_INFO,
+	  .idVendor		= 0x04f2,
+	  .idProduct		= 0xb67c,
+	  .bInterfaceClass	= USB_CLASS_VIDEO,
+	  .bInterfaceSubClass	= 1,
+	  .bInterfaceProtocol	= 0,
+	  .driver_info		= (kernel_ulong_t)&uvc_ctrl_power_line_limited },
 	/* Chicony EasyCamera */
 	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
 				| USB_DEVICE_ID_MATCH_INT_INFO,

---
base-commit: 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6
change-id: 20230817-chicony-9c35f2046c6f

Best regards,
-- 
Ricardo Ribalda <ribalda@...omium.org>