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Subject: Re: media: uvcvideo: Support realtek's UVC 1.5 device
To:     ming_qian@realsil.com.cn,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
References: <1525831988-32017-1-git-send-email-ming_qian@realsil.com.cn>
From:   Hans de Goede <hdegoede@redhat.com>
Message-ID: <b2f5c769-be06-0334-9ef8-328973a10a30@redhat.com>
Date:   Thu, 10 May 2018 17:38:15 +0200
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Hi,

On 09-05-18 04:13, ming_qian@realsil.com.cn wrote:
> From: ming_qian <ming_qian@realsil.com.cn>
> 
> The length of UVC 1.5 video control is 48, and it id 34 for UVC 1.1.
> Change it to 48 for UVC 1.5 device,
> and the UVC 1.5 device can be recognized.
> 
> More changes to the driver are needed for full UVC 1.5 compatibility.
> However, at least the UVC 1.5 Realtek RTS5847/RTS5852 cameras have
> been reported to work well.
> 
> Signed-off-by: ming_qian <ming_qian@realsil.com.cn>
> Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>

Looks good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

Regards,

Hans


> ---
>   drivers/media/usb/uvc/uvc_video.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
> index aa0082f..32dfb32 100644
> --- a/drivers/media/usb/uvc/uvc_video.c
> +++ b/drivers/media/usb/uvc/uvc_video.c
> @@ -171,6 +171,8 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream,
>   	int ret;
>   
>   	size = stream->dev->uvc_version >= 0x0110 ? 34 : 26;
> +	if (stream->dev->uvc_version >= 0x0150)
> +		size = 48;
>   	if ((stream->dev->quirks & UVC_QUIRK_PROBE_DEF) &&
>   			query == UVC_GET_DEF)
>   		return -EIO;
> @@ -259,6 +261,8 @@ static int uvc_set_video_ctrl(struct uvc_streaming *stream,
>   	int ret;
>   
>   	size = stream->dev->uvc_version >= 0x0110 ? 34 : 26;
> +	if (stream->dev->uvc_version >= 0x0150)
> +		size = 48;
>   	data = kzalloc(size, GFP_KERNEL);
>   	if (data == NULL)
>   		return -ENOMEM;
>