drm/i915/tgl: port to ddc pin mapping

Make the icl function generic so it is based on phy type and can be
applied to tgl as well.

I checked if this could not apply to EHL as well, but unfortunately
there the HPD and DDC/GMBUS pins for DDI C are mapped to TypeC Port 1
even though it doesn't have TC phy.

v2: don't add a separate function for TGL, but rather reuse the ICL one
    (suggested by Rodrigo)
v3: rebase after the introduction of enum phy and use it for the
    conversions

Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190711173115.28296-19-lucas.demarchi@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 0ebec69..77af0df 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2930,33 +2930,15 @@ static u8 cnp_port_to_ddc_pin(struct drm_i915_private *dev_priv,
 
 static u8 icl_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
 {
-       u8 ddc_pin;
+       enum phy phy = intel_port_to_phy(dev_priv, port);
 
-       switch (port) {
-       case PORT_A:
-               ddc_pin = GMBUS_PIN_1_BXT;
-               break;
-       case PORT_B:
-               ddc_pin = GMBUS_PIN_2_BXT;
-               break;
-       case PORT_C:
-               ddc_pin = GMBUS_PIN_9_TC1_ICP;
-               break;
-       case PORT_D:
-               ddc_pin = GMBUS_PIN_10_TC2_ICP;
-               break;
-       case PORT_E:
-               ddc_pin = GMBUS_PIN_11_TC3_ICP;
-               break;
-       case PORT_F:
-               ddc_pin = GMBUS_PIN_12_TC4_ICP;
-               break;
-       default:
-               MISSING_CASE(port);
-               ddc_pin = GMBUS_PIN_2_BXT;
-               break;
-       }
-       return ddc_pin;
+       if (intel_phy_is_combo(dev_priv, phy))
+               return GMBUS_PIN_1_BXT + port;
+       else if (intel_phy_is_tc(dev_priv, phy))
+               return GMBUS_PIN_9_TC1_ICP + intel_port_to_tc(dev_priv, port);
+
+       WARN(1, "Unknown port:%c\n", port_name(port));
+       return GMBUS_PIN_2_BXT;
 }
 
 static u8 mcc_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
@@ -3019,7 +3001,7 @@ static u8 intel_hdmi_ddc_pin(struct drm_i915_private *dev_priv,
 
        if (HAS_PCH_MCC(dev_priv))
                ddc_pin = mcc_port_to_ddc_pin(dev_priv, port);
-       else if (HAS_PCH_ICP(dev_priv))
+       else if (HAS_PCH_TGP(dev_priv) || HAS_PCH_ICP(dev_priv))
                ddc_pin = icl_port_to_ddc_pin(dev_priv, port);
        else if (HAS_PCH_CNP(dev_priv))
                ddc_pin = cnp_port_to_ddc_pin(dev_priv, port);