[Intel-gfx] [PATCH 2/7] drm/i915: Fix ibx max vswing/preemph

[Souza, Jose]

On Tue, 2020-05-12 at 20:41 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> IBX supports vswing level 3 and pre-emphasis level 3. Don't
> limit it to level 2 for those.

Matches https://01.org/linuxgraphics/documentation/driver-documentation-prms/2010-intel-core-processor-family

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

> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 7541264ff4e9..0924e041e1bf 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -3958,7 +3958,7 @@ intel_dp_voltage_max(struct intel_dp *intel_dp)
>  	if (HAS_DDI(dev_priv))
>  		return intel_ddi_dp_voltage_max(encoder);
>  	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) ||
> -		 (HAS_PCH_CPT(dev_priv) && port != PORT_A))
> +		 (HAS_PCH_SPLIT(dev_priv) && port != PORT_A))
>  		return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
>  	else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A)
>  		return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
> @@ -3976,7 +3976,7 @@ intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, u8 voltage_swing)
>  	if (HAS_DDI(dev_priv)) {
>  		return intel_ddi_dp_pre_emphasis_max(encoder, voltage_swing);
>  	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) ||
> -		   (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
> +		   (HAS_PCH_SPLIT(dev_priv) && port != PORT_A)) {
>  		switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
>  		case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
>  			return DP_TRAIN_PRE_EMPH_LEVEL_3;