[Intel-gfx] [PATCH 05/23] drm/i915: Don't enable the DDI-IO power in the TypeC TBT-alt mode

[Souza, Jose]

On Tue, 2019-06-04 at 17:58 +0300, Imre Deak wrote:
> According to the spec we should not enable the DDI-IO power domain if
> the TypeC port is in the TBT-alt mode, so do that only in the other
> TypeC modes or for non-TypeC ports.

With:
BSpec: 22243

Reviewed-by: José Roberto de Souza <jose.souza at intel.com>

> 
> Cc: Manasi Navare <manasi.d.navare at intel.com>
> Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
> Signed-off-by: Imre Deak <imre.deak at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c
> b/drivers/gpu/drm/i915/intel_ddi.c
> index a3574f14a3d0..8f223d48d562 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -3111,7 +3111,10 @@ static void intel_ddi_pre_enable_dp(struct
> intel_encoder *encoder,
>  
>  	intel_ddi_clk_select(encoder, crtc_state);
>  
> -	intel_display_power_get(dev_priv, dig_port-
> >ddi_io_power_domain);
> +	if (!intel_port_is_tc(dev_priv, port) ||
> +	    dig_port->tc_mode != TC_PORT_TBT_ALT)
> +		intel_display_power_get(dev_priv,
> +					dig_port->ddi_io_power_domain);
>  
>  	icl_program_mg_dp_mode(dig_port);
>  	icl_disable_phy_clock_gating(dig_port);
> @@ -3293,8 +3296,10 @@ static void intel_ddi_post_disable_dp(struct
> intel_encoder *encoder,
>  	intel_edp_panel_vdd_on(intel_dp);
>  	intel_edp_panel_off(intel_dp);
>  
> -	intel_display_power_put_unchecked(dev_priv,
> -					  dig_port-
> >ddi_io_power_domain);
> +	if (!intel_port_is_tc(dev_priv, encoder->port) ||
> +	    dig_port->tc_mode != TC_PORT_TBT_ALT)
> +		intel_display_power_put_unchecked(dev_priv,
> +						  dig_port-
> >ddi_io_power_domain);
>  
>  	intel_ddi_clk_disable(encoder);
>  }