linux-kernel - Re: [PATCH v7 0/7] incorporate pm runtime framework and eDP clean up

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Message-ID: <CAA8EJpo9CFf-Z3eiuKPvwf-y6eGkSibro-q-=SBxKK_L-zFOBA@mail.gmail.com>
Date:   Tue, 7 Nov 2023 23:23:43 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...il.com,
        agross@...nel.org, andersson@...nel.org, quic_abhinavk@...cinc.com,
        quic_jesszhan@...cinc.com, quic_sbillaka@...cinc.com,
        marijn.suijten@...ainline.org, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 0/7] incorporate pm runtime framework and eDP clean up

On Tue, 7 Nov 2023 at 23:01, Kuogee Hsieh <quic_khsieh@...cinc.com> wrote:
>
>
> On 11/6/2023 5:55 PM, Dmitry Baryshkov wrote:
> > On Sat, 7 Oct 2023 at 01:55, Kuogee Hsieh <quic_khsieh@...cinc.com> wrote:
> >> The purpose of this patch series is to incorporate pm runtime framework
> >> into MSM eDP/DP driver so that eDP panel can be detected by DRM eDP panel
> >> driver during system probe time. During incorporating procedure, original
> >> customized pm realted fucntions, such as dp_pm_prepare(), dp_pm_suspend(),
> >> dp_pm_resume() and dp_pm_prepare(), are removed and replaced with functions
> >> provided by pm runtiem framework such as pm_runtime_force_suspend() and
> >> pm_runtime_force_resume(). In addition, both eDP aux-bus and irq handler
> >> are bound at system probe time too.
> >
> > With this patchset in place I can crash the board using the following
> > sequence (SM8350-HDK):
> >
> > - plug the USBC DP dongle
> > - run modetest at any mode, don't press Enter yet
> > - unplug the dongle
> > - press Enter to stop modetest
> >
> > => the board resets to Sahara.
> >
> > Please ping me if you need any additional information from my side.
>
> questiosn,
>
> 1) which dongle are you used?

I have used several Dell and Hama USB-C dongles.

>
> 2) what code branch shoud I used to duplicate this problem.

I have pushed my kernel tree to
git.codelinaro.org/dmitry.baryshkov/linux.git, branch test-dp-rpm
I had several UCSI patches on top, but they should not be relevant.

>
> I can not duplicate  system crash problem at my setup kodiak (SM7325)
> chrome book with my PM runtime patch series.
>
> my code base is Linux 6.6-rc2 + pm runtime patch series (7 patches)
>
> I did:
>
> 1) plugin either apple dongle (DP-to-HDMI) + 1080p display or DP typeC
> cable directly to 1080p display
>
> 2)  stop ui
>
> 3) /usr/bin/modetest -M msm -s 34:1920x1080 (see test pattern show at
> display)
>
> 4) unplug apple dongle or DP typeC cable
>
> 5) hit enter key
>
> 6) start ui
>
> 7) display back to login page of chrome book
>
>


-- 
With best wishes
Dmitry