Hi, This fixes an issue found during a rework on the RPi3 where we would end up with the detect callback of the HDMI connector called while the device would be disabled. This unfortunately results in a complete CPU hang on the RaspberryPi. The documentation doesn't really provide any expectation on the power state for various operations that could be performed while the device is off, so the first patch makes that clear. The next two patches make sure the device is sufficiently powered for detect to run without any issue. Let me know what you think, Maxime Maxime Ripard (3): drm: Mention the power state requirement on side-channel operations drm/vc4: hdmi: Move the HSM clock enable to runtime_pm drm/vc4: hdmi: Make sure the controller is powered in detect drivers/gpu/drm/vc4/vc4_hdmi.c | 45 ++++++++++++++++++++++++++-------- include/drm/drm_connector.h | 5 ++++ include/drm/drm_dp_helper.h | 4 +++ include/drm/drm_mipi_dsi.h | 5 ++++ 4 files changed, 49 insertions(+), 10 deletions(-) -- 2.31.1
