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

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Message-ID: <CAA8EJpoFRp+7GyO=F3Ar21tfG5Yt0cL6zkAquqg7D1XXQjp50Q@mail.gmail.com>
Date:   Tue, 7 Nov 2023 03:55:51 +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 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.

-- 
With best wishes
Dmitry