[Intel-gfx] [PATCH 18/28] drm/i915/tgl: port to ddc pin mapping

[Lucas De Marchi]

From: Mahesh Kumar <mahesh1.kumar at intel.com>

Create a helper function to get ddc pin according to port number.

Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Signed-off-by: Mahesh Kumar <mahesh1.kumar at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/i915/display/intel_hdmi.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 0ebec69bbbfc..3b33e7626d7c 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2981,6 +2981,18 @@ static u8 mcc_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
 	return ddc_pin;
 }
 
+static u8 tgp_port_to_ddc_pin(struct drm_i915_private *dev_priv,
+			      enum port port)
+{
+	if (intel_port_is_combophy(dev_priv, port))
+		return GMBUS_PIN_1_BXT + port;
+	else if (intel_port_is_tc(dev_priv, port))
+		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 g4x_port_to_ddc_pin(struct drm_i915_private *dev_priv,
 			      enum port port)
 {
@@ -3017,7 +3029,9 @@ static u8 intel_hdmi_ddc_pin(struct drm_i915_private *dev_priv,
 		return info->alternate_ddc_pin;
 	}
 
-	if (HAS_PCH_MCC(dev_priv))
+	if (HAS_PCH_TGP(dev_priv))
+		ddc_pin = tgp_port_to_ddc_pin(dev_priv, port);
+	else if (HAS_PCH_MCC(dev_priv))
 		ddc_pin = mcc_port_to_ddc_pin(dev_priv, port);
 	else if (HAS_PCH_ICP(dev_priv))
 		ddc_pin = icl_port_to_ddc_pin(dev_priv, port);
-- 
2.21.0