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

[Kuogee Hsieh]

On 11/7/2023 1:23 PM, Dmitry Baryshkov wrote:
> On Tue, 7 Nov 2023 at 23:01, Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> wrote:
> > On 11/6/2023 5:55 PM, Dmitry Baryshkov wrote:
> > > On Sat, 7 Oct 2023 at 01:55, Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> 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.
git.codelinaro.org/dmitry.baryshkov/linux.git, branch test-dp-rpm <== I 
synced out his branch and it is still work at my chromebook Kodiak DUT.
> > 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