drm/msm/dp: fix runtime_pm handling in dp_wait_hpd_asserted

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The function dp_wait_hpd_asserted() uses pm_runtime_get_sync() and
doesn't care about the return value. Potentially this can lead to
unclocked access if for some reason resuming of the DP controller fails.

Change the function to use pm_runtime_resume_and_get() and return an
error if resume fails.

Fixes: e2969ee302 ("drm/msm/dp: move of_dp_aux_populate_bus() to eDP probe()")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/580137/
Link: https://lore.kernel.org/r/20240226223446.4194079-1-dmitry.baryshkov@linaro.org
[quic_abhinavk@quicinc.com: resolved trivial conflict while rebase]
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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Dmitry Baryshkov 2024-02-27 00:34:45 +02:00 • committed by Rob Clark

parent 6ed8175926

commit aeacc39e20

1 changed files with 4 additions and 1 deletions

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

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