Revert "drm/msm/dp: use drm_bridge_hpd_notify() to report HPD status changes"
This reverts commit e467e0bd ("drm/msm/dp: use drm_bridge_hpd_notify() to report HPD status changes"). The commit changed the way how the MSM DP driver communicates HPD-related events to the userspace. The mentioned commit made some of the HPD events being reported earlier. This way userspace starts poking around. It interacts in a bad way with the dp_bridge_detect and the driver's state machine, ending up either with the very long delays during hotplug detection or even inability of the DP driver to report the display as connected. A proper fix will involve redesigning of the HPD handling in the MSM DP driver. It is underway, but it will be intrusive and can not be thought about as a simple fix for the issue. Thus, revert the offending commit. Fixes: e467e0bd ("drm/msm/dp: use drm_bridge_hpd_notify() to report HPD status changes") Link: https://gitlab.freedesktop.org/drm/msm/-/issues/50 Reported-by:Johan Hovold <johan@kernel.org> Link: https://lore.kernel.org/r/Zd3YPGmrprxv-N-O@hovoldconsulting.com/ Signed-off-by:
Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Reviewed-by:
Abhinav Kumar <quic_abhinavk@quicinc.com> Tested-by:
Paloma Arellano <quic_parellan@quicinc.com> Tested-by:
Johan Hovold <johan+linaro@kernel.org> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK Patchwork: https://patchwork.freedesktop.org/patch/580313/ Link: https://lore.kernel.org/r/20240227220808.50146-1-dmitry.baryshkov@linaro.org
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