Re: [PATCH 5/8] drm/i915: Enable AUX power earlier

[Imre Deak <imre.deak@intel.com>]

On Wed, Oct 31, 2018 at 01:07:04AM +0200, Souza, Jose wrote:
> On Tue, 2018-10-30 at 17:40 +0200, Imre Deak wrote:
> > For DDI/TypeC ports the AUX power domain needs to be enabled before
> > the
> > port's PLL is enabled, so move the enabling earlier accordingly.
> 
> Could you just pointed out where did you got this information? I
> checked in this Bspec pages 20845, 20598 and 21750 and I did not found.

It's at 21750, connect/disconnect flows.

> 
> With that:
> Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
> 
> > 
> > Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > Signed-off-by: Imre Deak <imre.deak@intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_ddi.c     | 46 +++++++++++++++++++++++++-
> > ----------
> >  drivers/gpu/drm/i915/intel_display.c |  2 ++
> >  2 files changed, 34 insertions(+), 14 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_ddi.c
> > b/drivers/gpu/drm/i915/intel_ddi.c
> > index 5bb459011a49..7731ca704862 100644
> > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > @@ -2082,10 +2082,8 @@ bool intel_ddi_get_hw_state(struct
> > intel_encoder *encoder,
> >  }
> >  
> >  static inline enum intel_display_power_domain
> > -intel_ddi_main_link_aux_domain(struct intel_dp *intel_dp)
> > +intel_ddi_main_link_aux_domain(struct intel_digital_port *dig_port)
> >  {
> > -	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> > -
> >  	/* CNL+ HW requires corresponding AUX IOs to be powered up for
> > PSR with
> >  	 * DC states enabled at the same time, while for driver
> > initiated AUX
> >  	 * transfers we need the same AUX IOs to be powered but with DC
> > states
> > @@ -2120,11 +2118,8 @@ static u64 intel_ddi_get_power_domains(struct
> > intel_encoder *encoder,
> >  	domains = BIT_ULL(dig_port->ddi_io_power_domain);
> >  
> >  	/* AUX power is only needed for (e)DP mode, not for HDMI. */
> > -	if (intel_crtc_has_dp_encoder(crtc_state)) {
> > -		struct intel_dp *intel_dp = &dig_port->dp;
> > -
> > -		domains |=
> > BIT_ULL(intel_ddi_main_link_aux_domain(intel_dp));
> > -	}
> > +	if (intel_crtc_has_dp_encoder(crtc_state))
> > +		domains |=
> > BIT_ULL(intel_ddi_main_link_aux_domain(dig_port));
> >  
> >  	return domains;
> >  }
> > @@ -2891,6 +2886,32 @@ static void intel_ddi_clk_disable(struct
> > intel_encoder *encoder)
> >  	}
> >  }
> >  
> > +static void
> > +intel_ddi_pre_pll_enable(struct intel_encoder *encoder,
> > +			 const struct intel_crtc_state *crtc_state,
> > +			 const struct drm_connector_state *conn_state)
> > +{
> > +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> > +	struct intel_digital_port *dig_port = enc_to_dig_port(&encoder-
> > >base);
> > +
> > +	if (intel_crtc_has_dp_encoder(crtc_state))
> > +		intel_display_power_get(dev_priv,
> > +					intel_ddi_main_link_aux_domain(
> > dig_port));
> > +}
> > +
> > +static void
> > +intel_ddi_post_pll_disable(struct intel_encoder *encoder,
> > +			   const struct intel_crtc_state *crtc_state,
> > +			   const struct drm_connector_state
> > *conn_state)
> > +{
> > +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> > +	struct intel_digital_port *dig_port = enc_to_dig_port(&encoder-
> > >base);
> > +
> > +	if (intel_crtc_has_dp_encoder(crtc_state))
> > +		intel_display_power_put(dev_priv,
> > +					intel_ddi_main_link_aux_domain(
> > dig_port));
> > +}
> > +
> >  static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
> >  				    const struct intel_crtc_state
> > *crtc_state,
> >  				    const struct drm_connector_state
> > *conn_state)
> > @@ -2904,9 +2925,6 @@ static void intel_ddi_pre_enable_dp(struct
> > intel_encoder *encoder,
> >  
> >  	WARN_ON(is_mst && (port == PORT_A || port == PORT_E));
> >  
> > -	intel_display_power_get(dev_priv,
> > -				intel_ddi_main_link_aux_domain(intel_dp
> > ));
> > -
> >  	intel_dp_set_link_params(intel_dp, crtc_state->port_clock,
> >  				 crtc_state->lane_count, is_mst);
> >  
> > @@ -3071,9 +3089,6 @@ static void intel_ddi_post_disable_dp(struct
> > intel_encoder *encoder,
> >  	intel_display_power_put(dev_priv, dig_port-
> > >ddi_io_power_domain);
> >  
> >  	intel_ddi_clk_disable(encoder);
> > -
> > -	intel_display_power_put(dev_priv,
> > -				intel_ddi_main_link_aux_domain(intel_dp
> > ));
> >  }
> >  
> >  static void intel_ddi_post_disable_hdmi(struct intel_encoder
> > *encoder,
> > @@ -3830,6 +3845,9 @@ void intel_ddi_init(struct drm_i915_private
> > *dev_priv, enum port port)
> >  	intel_encoder->enable = intel_enable_ddi;
> >  	if (IS_GEN9_LP(dev_priv))
> >  		intel_encoder->pre_pll_enable = bxt_ddi_pre_pll_enable;
> > +
> > +	intel_encoder->pre_pll_enable = intel_ddi_pre_pll_enable;
> > +	intel_encoder->post_pll_disable = intel_ddi_post_pll_disable;
> >  	intel_encoder->pre_enable = intel_ddi_pre_enable;
> >  	intel_encoder->disable = intel_disable_ddi;
> >  	intel_encoder->post_disable = intel_ddi_post_disable;
> > diff --git a/drivers/gpu/drm/i915/intel_display.c
> > b/drivers/gpu/drm/i915/intel_display.c
> > index 36710a30fb37..12ba2b923e6b 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -5876,6 +5876,8 @@ static void haswell_crtc_disable(struct
> > intel_crtc_state *old_crtc_state,
> >  
> >  	if (INTEL_GEN(dev_priv) >= 11)
> >  		icl_unmap_plls_to_ports(crtc, old_crtc_state,
> > old_state);
> > +
> > +	intel_encoders_post_pll_disable(crtc, old_crtc_state,
> > old_state);
> >  }
> >  
> >  static void i9xx_pfit_enable(const struct intel_crtc_state
> > *crtc_state)
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