linux-kernel - Re: [PATCH 0/8] Thunderbolt and DP altmode support for cros-ec-typec

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Message-ID: <6flxq7m7fdcpajdg5sthar6xlnpn2b3nzzwgp55jlqrjw5ubge@kdym7c2kv5fm>
Date: Wed, 25 Sep 2024 20:12:01 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
Cc: heikki.krogerus@...ux.intel.com, tzungbi@...nel.org, jthies@...gle.com, 
	pmalani@...omium.org, akuchynski@...gle.com, Benson Leung <bleung@...omium.org>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Guenter Roeck <groeck@...omium.org>, 
	chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 0/8] Thunderbolt and DP altmode support for cros-ec-typec

On Wed, Sep 25, 2024 at 09:25:01AM GMT, Abhishek Pandit-Subedi wrote:
> 
> Hi Heikki, Tzung-Bi et al,
> 
> This patch series adds support for alternate mode entry for the
> cros-ec-typec driver for Displayport and Thunderbolt.
> 
> Thunderbolt support is added by adapting an RFC Heikki had posted
> previously:
> 
> https://lore.kernel.org/linux-usb/20191230152857.43917-1-heikki.krogerus@linux.intel.com/
> 
> A few comments on the series:
> 
> * The cros-ec interface will not accept any VDOs/VDMs so we simply
>   ignore any configurations we are passed (i.e. DPConfigure). This means
>   the sysfs control of DP lanes won't work.
> * ChromeOS has two modes of operation for alt-modes: entirely EC driven
>   or AP-driven from userspace (via the typec daemon). Thus, we never
>   expect the kernel alt-mode drivers to auto-enter modes.
> 
> This was tested on kernel 6.6 with a ChromeOS Brya device and compile
> tested against linux-usb (with allmodconfig).

Please test on top of the linux-usb or linux-next. 6.6 is nine months
old kernel.

Also for v2 please consider CC'ing both lists for all patches. Otherwise
it's hard to follow the changes.

> 
> Thanks,
> Abhishek
> 
> 
> 

-- 
With best wishes
Dmitry