The pin mapping for the final two outputs varies according to which PCH
is present on the platform: with TGP the pins are remapped into the TC
range, whereas with CMP they stay in the traditional combo output range.
Bspec: 49181
Cc: Aditya Swarup <aditya.swarup@xxxxxxxxx>
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_hdmi.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 010f37240710..a31a98d26882 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -3082,6 +3082,24 @@ static u8 mcc_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
return ddc_pin;
}
+static u8 rkl_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
+{
+ enum phy phy = intel_port_to_phy(dev_priv, port);
+
+ WARN_ON(port == PORT_C);
+
+ /*
+ * Pin mapping for RKL depends on which PCH is present. With TGP, the
+ * final two outputs use type-c pins, even though they're actually
+ * combo outputs. With CMP, the traditional DDI A-D pins are used for
+ * all outputs.
+ */
+ if (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP && phy >= PHY_C)
+ return GMBUS_PIN_9_TC1_ICP + phy - PHY_C;
+
+ return GMBUS_PIN_1_BXT + phy;
+}
+
static u8 g4x_port_to_ddc_pin(struct drm_i915_private *dev_priv,
enum port port)
{
@@ -3119,7 +3137,9 @@ static u8 intel_hdmi_ddc_pin(struct intel_encoder *encoder)
return ddc_pin;
}
- if (HAS_PCH_MCC(dev_priv))
+ if (IS_ROCKETLAKE(dev_priv))
+ ddc_pin = rkl_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 (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
ddc_pin = icl_port_to_ddc_pin(dev_priv, port);
--
2.24.1
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