Hi,
This series aims at fixing a complete and silent hang when one tries to use CEC while the display output is off.
This can be tested with:
echo off > /sys/class/drm/card0-HDMI-A-1/status cec-ctl --tuner -p 1.0.0.0 cec-compliance
This series addresses it by making sure the HDMI controller is powered up as soon as the CEC device is opened by the userspace.
Let me know what you think, Maxime
Maxime Ripard (4): drm/vc4: hdmi: Mark the device as active if running drm/vc4: hdmi: Put the device on error in pre_crtc_configure drm/vc4: hdmi: Split the CEC disable / enable functions in two drm/vc4: hdmi: Make sure the device is powered with CEC
drivers/gpu/drm/vc4/vc4_hdmi.c | 85 ++++++++++++++++++++++------------ 1 file changed, 55 insertions(+), 30 deletions(-)