Re: [PATCH v2 0/2] usb: typec: ucsi: add workaround for several Qualcomm platforms

[Johan Hovold <johan@kernel.org>]

On Fri, Dec 08, 2023 at 01:10:59PM +0200, Dmitry Baryshkov wrote:
> On Fri, 8 Dec 2023 at 13:09, Johan Hovold <johan@kernel.org> wrote:
> > On Fri, Dec 08, 2023 at 12:58:29PM +0200, Dmitry Baryshkov wrote:
> > > On Fri, 8 Dec 2023 at 10:39, Johan Hovold <johan@kernel.org> wrote:
> > > > On Wed, Oct 25, 2023 at 02:49:28PM +0300, Dmitry Baryshkov wrote:
> > > > > The UCSI firmware on Qualcomm SC8180X, SC8280XP and SM8350 are buggy.
> > > > > Submitting UCSI_GET_PDOS command for partners which do not actually
> > > > > support PD and do not have PDOs causes firmware to crash, preventing
> > > > > further UCSI activity. Firmware on newer platforms have fixed this
> > > > > issue. In order to still be able to use UCSI functionality on the
> > > > > mentioned platforms (e.g. to be able to handle USB role switching),
> > > > > apply a workaround that completely shortcuts UCSI_GET_PDOS command for
> > > > > the USB-C partner.
> > > > >
> > > > > This has been tested on sm8350 only, but should apply to other
> > > > > platforms. I did not enable UCSI for sc8180x yet, it has slightly
> > > > > different implementation, which I'd like to get tested first.
> > > >
> > > > Has no one tested this on sc8280xp/x13s before merging?
> > > >
> > > > I see a bunch of errors with this series applied to 6.7-rc4:
> > > >
> > > > [   11.999960] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: timeout waiting for UCSI sync write response
> > > > [   12.000430] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: ucsi_handle_connector_change: GET_CONNECTOR_STATUS failed (-110)
> > > > [   17.120515] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: timeout waiting for UCSI sync write response
> > > > [   17.124204] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: GET_CONNECTOR_STATUS failed (-110)
> > > > [   23.264792] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: timeout waiting for UCSI sync write response
> > > > [   23.264953] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: GET_CONNECTOR_STATUS failed (-110)
> > >
> > > Can you please post previous messages or is the first timeout the
> > > first error from ucsi?
> >
> > These are all the ucsi messages in the log (dmesg | grep ucsi).
> >
> > The first error is sometimes GET_CONNECTOR_STATUS failed (-95) instead:
> 
> Ack, thank you. This is pending on my side together with the UCSI
> glink / altmode rework. I hope to have patches for that closer to the
> NY.

What does that mean? That we shall revert these patches until that work
is finished? I don't want to have these errors littering the logs,
scaring users and possibly slowing down boot (those are five second
timeouts).

Also, if this was known issue, why wasn't it mentioned the cover letter
or commit messages?

Johan