linux-kernel - [PATCH v6 4/8] media: uvcvideo: Limit power line control for Quanta UVC Webcam

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Date:   Wed, 15 Jun 2022 17:12:55 +0200
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        tfiga@...omium.org, senozhatsky@...omium.org, yunkec@...gle.com
Cc:     Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v6 4/8] media: uvcvideo: Limit power line control for Quanta UVC Webcam

The device does not implement the power line control correctly. Add a
corresponding control mapping override.

Bus 001 Device 003: ID 0408:3090 Quanta Computer, Inc. USB2.0 HD UVC WebCam
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x0408 Quanta Computer, Inc.
  idProduct          0x3090
  bcdDevice            0.04
  iManufacturer           3 Quanta
  iProduct                1 USB2.0 HD UVC WebCam
  iSerial                 2 0x0001
  bNumConfigurations      1

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
 drivers/media/usb/uvc/uvc_driver.c | 35 ++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 6c86faecbea2..4fb07084f1c0 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -2643,6 +2643,32 @@ MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
  * Driver initialization and cleanup
  */
 
+static const struct uvc_menu_info power_line_frequency_controls_limited[] = {
+	{ 0, "Invalid" },
+	{ 1, "50 Hz" },
+	{ 2, "60 Hz" },
+};
+
+static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = {
+	.id		= V4L2_CID_POWER_LINE_FREQUENCY,
+	.entity		= UVC_GUID_UVC_PROCESSING,
+	.selector	= UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
+	.size		= 2,
+	.offset		= 0,
+	.v4l2_type	= V4L2_CTRL_TYPE_MENU,
+	.data_type	= UVC_CTRL_DATA_TYPE_ENUM,
+	.menu_info	= power_line_frequency_controls_limited,
+	.menu_min	= 1,
+	.menu_count	= ARRAY_SIZE(power_line_frequency_controls_limited),
+};
+
+static const struct uvc_device_info uvc_ctrl_power_line_limited = {
+	.mappings = (const struct uvc_control_mapping *[]) {
+		&uvc_ctrl_power_line_mapping_limited,
+		NULL, /* Sentinel */
+	},
+};
+
 static const struct uvc_device_info uvc_quirk_probe_minmax = {
 	.quirks = UVC_QUIRK_PROBE_MINMAX,
 };
@@ -2673,6 +2699,15 @@ static const struct uvc_device_info uvc_quirk_force_y8 = {
  * though they are compliant.
  */
 static const struct usb_device_id uvc_ids[] = {
+	/* Quanta USB2.0 HD UVC Webcam */
+	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
+				| USB_DEVICE_ID_MATCH_INT_INFO,
+	  .idVendor		= 0x0408,
+	  .idProduct		= 0x3090,
+	  .bInterfaceClass	= USB_CLASS_VIDEO,
+	  .bInterfaceSubClass	= 1,
+	  .bInterfaceProtocol	= 0,
+	  .driver_info		= (kernel_ulong_t)&uvc_ctrl_power_line_limited },
 	/* LogiLink Wireless Webcam */
 	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
 				| USB_DEVICE_ID_MATCH_INT_INFO,
-- 
2.36.1.476.g0c4daa206d-goog