linux-kernel - Re: [PATCH] USB: serial: option: add MediaTek T7XX compositions

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Message-ID: <ZyDRIW0DIGn_FIsD@hovoldconsulting.com>
Date: Tue, 29 Oct 2024 13:12:17 +0100
From: Johan Hovold <johan@...nel.org>
To: wojackbb@...il.com
Cc: gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: serial: option: add MediaTek T7XX compositions

On Mon, Oct 28, 2024 at 04:04:15PM +0800, wojackbb@...il.com wrote:
> From: Jack Wu <wojackbb@...il.com>
> 
> Add the MediaTek T7XX compositions:

Can you say something about what the various interfaces are used for
here?

> T:  Bus=03 Lev=01 Prnt=01 Port=05 Cnt=01 Dev#= 74 Spd=480  MxCh= 0
> D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=0e8d ProdID=7129 Rev= 0.01
> S:  Manufacturer=MediaTek Inc.
> S:  Product=USB DATA CARD
> S:  SerialNumber=004402459035402
> C:* #Ifs=10 Cfg#= 1 Atr=a0 MxPwr=500mA

> Signed-off-by: Jack Wu <wojackbb@...il.com>
> ---
>  drivers/usb/serial/option.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
> index 4f18f189f309..b6118f545386 100644
> --- a/drivers/usb/serial/option.c
> +++ b/drivers/usb/serial/option.c
> @@ -2244,6 +2244,7 @@ static const struct usb_device_id option_ids[] = {
>  	  .driver_info = NCTRL(2) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(MEDIATEK_VENDOR_ID, 0x7127, 0xff, 0x00, 0x00),
>  	  .driver_info = NCTRL(2) | NCTRL(3) | NCTRL(4) },
> +	{ USB_DEVICE_AND_INTERFACE_INFO(MEDIATEK_VENDOR_ID, 0x7129, 0xff, 0x00, 0x00) },	/* MediaTek T7XX */

Should you mark some of the interfaces are not accepting modem control
requests similar to 0x7126 and 0x7127?

>  	{ USB_DEVICE(CELLIENT_VENDOR_ID, CELLIENT_PRODUCT_MEN200) },
>  	{ USB_DEVICE(CELLIENT_VENDOR_ID, CELLIENT_PRODUCT_MPL200),
>  	  .driver_info = RSVD(1) | RSVD(4) },

Johan