drm/msm/dp: reset dp controller only at boot up and pm_resume

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DP_SW_RESET is the global SW reset that is used to initialize DP
controller. If DP_SW_RESET executed during connection setup,
two HPD related side effects may occurred,
1) pending HPD interrupts cleared unexpected
2) re start debounce logic which trigger another interrupt
This patch only issue DP_SW_RESET at boot up and pm_resume.
This patch also reinit video_comp before configure dp controller
to avoid missing VIDEO_READY interrupt.

Fixes: 9fc418430c ("drm/msm/dp: unplug interrupt missed after irq_hpd handler")
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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Kuogee Hsieh 2021-02-05 12:44:38 -08:00 • committed by Rob Clark

parent c8d99bb938

commit ea9f337ce8

3 changed files with 17 additions and 21 deletions

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22

drivers/gpu/drm/msm/dp/dp_ctrl.c

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2

drivers/gpu/drm/msm/dp/dp_ctrl.h

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14

drivers/gpu/drm/msm/dp/dp_display.c

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