16 Jun
2021
16 Jun
'21
12:35 p.m.
On Wed, Jun 16, 2021 at 11:51:26AM +0100, Dave Stevenson wrote:
On Tue, 25 May 2021 at 10:11, Maxime Ripard maxime@cerno.tech wrote:
If the HPD GPIO is not available and drm_probe_ddc fails, we end up reading the HDMI_HOTPLUG register, but the controller might be powered off resulting in a CPU hang. Make sure we have the power domain and the HSM clock powered during the detect cycle to prevent the hang from happening.
Fixes: 4f6e3d66ac52 ("drm/vc4: Add runtime PM support to the HDMI encoder driver") Signed-off-by: Maxime Ripard maxime@cerno.tech
Reviewed-by: Dave Stevenson dave.stevenson@raspberrypi.com
Applied patches 2 and 3, I'll resend a new version of patch 1 after some comments by Daniel on IRC.
Thanks! Maxime