[PATCH v2 6/7] media: uvcvideo: Fix power line control for Lenovo Integrated Camera

From: Ricardo Ribalda
Date: Thu Jan 05 2023 - 08:57:02 EST


The device does not implement the power line control correctly. It is
a UVC 1.5 device, but implements the PLC control as a UVC 1.1 device.

Add the corresponding control mapping override.

Bus 003 Device 002: ID 30c9:0093 Lenovo Integrated Camera
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.01
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x30c9
idProduct 0x0093
bcdDevice 0.07
iManufacturer 3 Lenovo
iProduct 1 Integrated Camera
iSerial 2 8SSC21J75356V1SR2830069
bNumConfigurations 1

Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
drivers/media/usb/uvc/uvc_ctrl.c | 2 +-
drivers/media/usb/uvc/uvc_driver.c | 16 ++++++++++++++++
drivers/media/usb/uvc/uvcvideo.h | 1 +
3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index f559a1ac6e3c..28ef9b2024a1 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -736,7 +736,7 @@ const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = {
V4L2_CID_POWER_LINE_FREQUENCY_50HZ),
};

-static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11 = {
+const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11 = {
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 37d2b08bc8b2..57c948d47bbf 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -2385,6 +2385,13 @@ static const struct uvc_device_info uvc_ctrl_power_line_limited = {
},
};

+static const struct uvc_device_info uvc_ctrl_power_line_uvc11 = {
+ .mappings = (const struct uvc_control_mapping *[]) {
+ &uvc_ctrl_power_line_mapping_uvc11,
+ NULL, /* Sentinel */
+ },
+};
+
static const struct uvc_device_info uvc_quirk_probe_minmax = {
.quirks = UVC_QUIRK_PROBE_MINMAX,
};
@@ -2964,6 +2971,15 @@ static const struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) },
+ /* Lenovo Integrated Camera */
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x30c9,
+ .idProduct = 0x0093,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = UVC_PC_PROTOCOL_15,
+ .driver_info = (kernel_ulong_t)&uvc_ctrl_power_line_uvc11 },
/* Sonix Technology USB 2.0 Camera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 1b2d9f327583..31c33eb0edf5 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -748,6 +748,7 @@ void uvc_status_stop(struct uvc_device *dev);

/* Controls */
extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited;
+extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11;
extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;

int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,

--
2.39.0.314.g84b9a713c41-goog-b4-0.11.0-dev-696ae