On 11/8/2023 10:10 AM, Kuogee Hsieh wrote:
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.
Perhaps the gap in test results with the same tree is due to internal
hpd vs hpd pin. We need to try this on a device which does not use
internal hpd.
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
