[Intel-gfx] [PATCH] drm/i915: Call intel_opregion_notify_encoder in intel_sanitize_encoder

[Ville Syrjälä]

On Wed, Dec 06, 2017 at 09:52:51AM +0100, Maarten Lankhorst wrote:
> Op 01-12-17 om 14:32 schreef Ville Syrjälä:
> > On Thu, Nov 30, 2017 at 04:18:53PM +0100, Maarten Lankhorst wrote:
> >> Normally this is called on a modeset, but the call is missing when
> >> we inherit the mode from the BIOS, so make sure it's called somewhere
> >> in hardware readout.
> >>
> >> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> >> ---
> >>  drivers/gpu/drm/i915/intel_display.c | 2 ++
> >>  1 file changed, 2 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> >> index cd60b4d5cd9d..26edae07e006 100644
> >> --- a/drivers/gpu/drm/i915/intel_display.c
> >> +++ b/drivers/gpu/drm/i915/intel_display.c
> >> @@ -14843,6 +14843,8 @@ static void intel_sanitize_encoder(struct intel_encoder *encoder)
> >>  
> >>  		connector->base.dpms = DRM_MODE_DPMS_OFF;
> >>  		connector->base.encoder = NULL;
> >> +	} else if (connector) {
> >> +		intel_opregion_notify_encoder(encoder, true);
> >
> > We should probably also do intel_opregion_notify_encoder(encoder, false)
> > when intel_sanitize_encoder() disables the encoder.
> Would it be terrible to always call intel_opregion_notify_encoder, with true or false depending on need?

Sounds like a reasonable approach to me. But it's hard to say what the
correct thing is since this is all some form of BIOS magic.

-- 
Ville Syrjälä
Intel OTC