Re: [PATCH v3 1/3] usb: typec: ucsi: Detect and skip duplicate altmodes from buggy firmware

[Heikki Krogerus]

+François

On Wed, Mar 11, 2026 at 03:57:41PM +0200, Heikki Krogerus wrote:
> Thu, Mar 05, 2026 at 04:58:02PM +0200, Dmitry Baryshkov kirjoitti:
> > On Wed, Feb 11, 2026 at 06:37:41AM +0100, Greg Kroah-Hartman wrote:
> > > On Wed, Feb 11, 2026 at 11:32:37AM +0800, AceLan Kao wrote:
> > > > A gentle ping.
> > > > Please help to review these patches, thanks.
> > > 
> > > Wait, no, we rejected this series and said "fix the firmware".
> > > 
> > > What happened to doing that?
> > 
> > Having a similar problem with other platforms. It's not always possible
> > to fix the firmware. I have one platform with a similar issue, but that
> > laptop is EOLed long ago (Lenovo Yoga C630, the issue has been worked
> > around in the EC driver, but I'd be really happy to switch to the
> > generic fixup). At this point it really feels that there might
> > be more UCSI implemetations having this issue. 
> 
> I would still like to get an answer from Dell for this (if this was
> the Dell case). It looks like they are using the GET_ALTMODES_COMMAND
> in some custom way. It's almost like they are first returning all the
> SVIDs without the modes, followed by something else.
> 
> So even if these products are EOL, and we will never get the firmware
> fixed, we still need to understand what exactly is being returned to
> the command, and is it returned like that intentionally or not.

François is now seeing the same issue. I guess nobody has had any
luck contacting Dell?

Chia-Lin, could you rebase and resend this?

thanks,

-- 
heikki