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Ehrhardt" , Pei Xiao , =?iso-8859-1?Q?Fran=E7ois?= Scala , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 1/3] usb: typec: ucsi: Detect and skip duplicate altmodes from buggy firmware Message-ID: References: <20251224070022.4082182-1-acelan.kao@canonical.com> <2026021124-badly-emit-e90f@gregkh> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: +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