On Tue, Feb 09, 2021 at 04:28:30PM -0500, Lyude Paul wrote:
> Next, let's start introducing the HPD pin mappings for Intel's new gen9_bc
> platform in order to make hotplugging display connectors work. Since
> gen9_bc is just a TGP PCH along with a CML CPU, except with the same HPD
> mappings as ICL, we simply add a skl_hpd_pin function that is shared
> between gen9 and gen9_bc which handles both the traditional gen9 HPD pin
> mappings and the Icelake HPD pin mappings that gen9_bc uses.
>
> Changes since v4:
> * Split this into its own commit
> * Introduce skl_hpd_pin() like vsyrjala suggested and use that instead of
> sticking our HPD pin mappings in TGP code
>
> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
> [originally from Tejas's work]
> Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@xxxxxxxxx>
> Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_ddi.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 3c4003605f93..01b171f52694 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -3954,6 +3954,14 @@ static enum hpd_pin cnl_hpd_pin(struct drm_i915_private *dev_priv,
> return HPD_PORT_A + port - PORT_A;
> }
>
> +static enum hpd_pin skl_hpd_pin(struct drm_i915_private *dev_priv, enum port port)
> +{
> + if (HAS_PCH_TGP(dev_priv))
> + return icl_hpd_pin(dev_priv, port);
> +
> + return HPD_PORT_A + port - PORT_A;
> +}
> +
> #define port_tc_name(port) ((port) - PORT_TC1 + '1')
> #define tc_port_name(tc_port) ((tc_port) - TC_PORT_1 + '1')
>
> @@ -4070,6 +4078,8 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
> encoder->hpd_pin = icl_hpd_pin(dev_priv, port);
> else if (IS_GEN(dev_priv, 10))
> encoder->hpd_pin = cnl_hpd_pin(dev_priv, port);
> + else if (IS_GEN(dev_priv, 9))
> + encoder->hpd_pin = skl_hpd_pin(dev_priv, port);
> else
> encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);
>
> --
> 2.29.2
>
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