linux-kernel - Re: [PATCH 1/2] usb: gadget: uvc: Updating bcdUVC field to 0x0110

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Message-ID: <20210314015846.GB17526@b29397-desktop>
Date:   Sun, 14 Mar 2021 09:58:46 +0800
From:   Peter Chen <peter.chen@...nel.org>
To:     Pawel Laszczak <pawell@...ence.com>
Cc:     balbi@...nel.org, gregkh@...uxfoundation.org,
        linux-api@...r.kernel.org, laurent.pinchart@...asonboard.com,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        kurahul@...ence.com
Subject: Re: [PATCH 1/2] usb: gadget: uvc: Updating bcdUVC field to 0x0110

On 21-03-08 11:27:34, Pawel Laszczak wrote:
> From: Pawel Laszczak <pawell@...ence.com>
> 
> Command Verifier during UVC Descriptor Tests (Class Video Control
> Interface Descriptor Test Video) compleins about:

%s/compleins/complains

> 
> Video Control Interface Header bcdUVC is 0x0100. USB Video Class
> specification 1.0 has been replaced by 1.1 specification
> (UVC: 6.2.26) Class Video Control Interface Descriptor bcdUVC is not 1.1

What does this (UVC: 6.2.26) mean? There are only 4 chapters for this
spec, Am I something wrong?

> 
> Signed-off-by: Pawel Laszczak <pawell@...ence.com>
> ---
>  drivers/usb/gadget/function/uvc_configfs.c | 2 +-
>  drivers/usb/gadget/legacy/webcam.c         | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c
> index 00fb58e50a15..cd28dec837dd 100644
> --- a/drivers/usb/gadget/function/uvc_configfs.c
> +++ b/drivers/usb/gadget/function/uvc_configfs.c
> @@ -231,7 +231,7 @@ static struct config_item *uvcg_control_header_make(struct config_group *group,
>  	h->desc.bLength			= UVC_DT_HEADER_SIZE(1);
>  	h->desc.bDescriptorType		= USB_DT_CS_INTERFACE;
>  	h->desc.bDescriptorSubType	= UVC_VC_HEADER;
> -	h->desc.bcdUVC			= cpu_to_le16(0x0100);
> +	h->desc.bcdUVC			= cpu_to_le16(0x0110);
>  	h->desc.dwClockFrequency	= cpu_to_le32(48000000);
>  
>  	config_item_init_type_name(&h->item, name, &uvcg_control_header_type);
> diff --git a/drivers/usb/gadget/legacy/webcam.c b/drivers/usb/gadget/legacy/webcam.c
> index a9f8eb8e1c76..3a61de4bb2b1 100644
> --- a/drivers/usb/gadget/legacy/webcam.c
> +++ b/drivers/usb/gadget/legacy/webcam.c
> @@ -90,7 +90,7 @@ static const struct UVC_HEADER_DESCRIPTOR(1) uvc_control_header = {
>  	.bLength		= UVC_DT_HEADER_SIZE(1),
>  	.bDescriptorType	= USB_DT_CS_INTERFACE,
>  	.bDescriptorSubType	= UVC_VC_HEADER,
> -	.bcdUVC			= cpu_to_le16(0x0100),
> +	.bcdUVC			= cpu_to_le16(0x0110),
>  	.wTotalLength		= 0, /* dynamic */
>  	.dwClockFrequency	= cpu_to_le32(48000000),
>  	.bInCollection		= 0, /* dynamic */
> -- 
> 2.25.1
> 

-- 

Thanks,
Peter Chen