Messages in this thread | | | Date | Wed, 1 Mar 2023 09:15:53 -0500 | From | Sasha Levin <> | Subject | Re: [PATCH AUTOSEL 6.2 18/60] drm/msm/dp: Remove INIT_SETUP delay |
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On Mon, Feb 27, 2023 at 10:12:20AM +0100, Johan Hovold wrote: >On Sun, Feb 26, 2023 at 09:00:03PM -0500, Sasha Levin wrote: >> From: Bjorn Andersson <quic_bjorande@quicinc.com> >> >> [ Upstream commit e17af1c9d861dc177e5b56009bd4f71ace688d97 ] >> >> During initalization of the DisplayPort controller an EV_HPD_INIT_SETUP >> event is generated, but with a delay of 100 units. This delay existed to >> circumvent bug in the QMP combo PHY driver, where if the DP part was >> powered up before USB, the common properties would not be properly >> initialized - and USB wouldn't work. >> >> This issue was resolved in the recent refactoring of the QMP driver, >> so it's now possible to remove this delay. >> >> While there is still a timing dependency in the current implementation, >> test indicates that it's now possible to boot with an external display >> on USB Type-C and have the display power up, without disconnecting and >> reconnecting the cable. >> >> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com> >> Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com> >> Patchwork: https://patchwork.freedesktop.org/patch/518729/ >> Link: https://lore.kernel.org/r/20230117172951.2748456-1-quic_bjorande@quicinc.com >> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> >> Signed-off-by: Sasha Levin <sashal@kernel.org> > >This is not a bug fix and should not be backported.
Ack, I'll drop all the INIT_SETUP patches. Thanks!
-- Thanks, Sasha
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