[PATCH 3/3] drm/vc4: hdmi: Make sure the controller is powered in detect

[Maxime Ripard]

On Wed, Jun 16, 2021 at 11:51:26AM +0100, Dave Stevenson wrote:
> On Tue, 25 May 2021 at 10:11, Maxime Ripard <maxime at 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 at cerno.tech>
> 
> Reviewed-by: Dave Stevenson <dave.stevenson at 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
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