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

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Message-ID: <Y7iLwzYCEzhT8lCl@pendragon.ideasonboard.com>
Date:   Fri, 6 Jan 2023 22:59:47 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, Yunke Cao <yunkec@...omium.org>,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: Re: [PATCH v2 6/7] media: uvcvideo: Fix power line control for
 Lenovo Integrated Camera

Hi Ricardo,

Thank you for the patch.

On Thu, Jan 05, 2023 at 02:52:57PM +0100, Ricardo Ribalda wrote:
> 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.

Did you mean PLF (power line frequency) ? I'd write:

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

No need to resubmit just for this, I'll handle it locally.

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> 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@...omium.org>
> ---
>  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,

-- 
Regards,

Laurent Pinchart