drm/msm/dp: check sink_count before update is_connected status
Link status is different from display connected status in the case of something like an Apple dongle where the type-c plug can be connected, and therefore the link is connected, but no sink is connected until an HDMI cable is plugged into the dongle. The sink_count of DPCD of dongle will increase to 1 once an HDMI cable is plugged into the dongle so that display connected status will become true. This checking also apply at pm_resume. Changes in v4: -- none Fixes: 94e58e2d06e3 ("drm/msm/dp: reset dp controller only at boot up and pm_resume") Reported-by:Stephen Boyd <swboyd@chromium.org> Reviewed-by:
Stephen Boyd <swboyd@chromium.org> Tested-by:
Stephen Boyd <swboyd@chromium.org> Signed-off-by:
Kuogee Hsieh <khsieh@codeaurora.org> Fixes: 8ede2ecc ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets") Link: https://lore.kernel.org/r/1619048258-8717-2-git-send-email-khsieh@codeaurora.org Signed-off-by:
Rob Clark <robdclark@chromium.org>
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