[Intel-gfx] [PATCH 1/2] drm/i915: Move the lspcon resume from .reset() to intel_dp_sink_dpms()

[Ville Syrjälä]

On Mon, Oct 19, 2020 at 06:27:01PM +0300, Imre Deak wrote:
> On Fri, Oct 16, 2020 at 10:47:59PM +0300, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > Rather that try to trick LSPCON back into PCON mode from the .reset()
> > hook let's just do that as a regular part of the normal modeset
> > sequence, which is going to take care of the system resume case. During
> > a normal modeset this should normally be a nop as the mode should have
> > already been switched by .detect().
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_dp.c | 5 ++---
> >  1 file changed, 2 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> > index 52075a241eaf..4784aaeb934e 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > @@ -3490,6 +3490,8 @@ void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
> >  	} else {
> >  		struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);
> >  
> > +		lspcon_resume(dp_to_dig_port(intel_dp));
> 
> Only applies when lspcon->active (the check could be moved to
> lspcon_resume).

lspcon->active is mostly nonsense these days, and lspcon_resume()
already checks it to se if it should take the resume or init path.
I have no idea why there would be any difference between those paths
anyway.

> 
> With that fixed:
> Reviewed-by: Imre Deak <imre.deak at intel.com>
> 
> > +
> >  		/*
> >  		 * When turning on, we need to retry for 1ms to give the sink
> >  		 * time to wake up.
> > @@ -6782,14 +6784,11 @@ void intel_dp_encoder_reset(struct drm_encoder *encoder)
> >  {
> >  	struct drm_i915_private *dev_priv = to_i915(encoder->dev);
> >  	struct intel_dp *intel_dp = enc_to_intel_dp(to_intel_encoder(encoder));
> > -	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> >  	intel_wakeref_t wakeref;
> >  
> >  	if (!HAS_DDI(dev_priv))
> >  		intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg);
> >  
> > -	lspcon_resume(dig_port);
> > -
> >  	intel_dp->reset_link_params = true;
> >  
> >  	if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
> > -- 
> > 2.26.2
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel