[Intel-gfx] [PATCH 2/3] drm/i915/ehl: Make icp_digital_port_connected() use phy instead of port

[Matt Roper]

When looking at SDEISR to determine the connection status of combo
outputs, we should use the phy index rather than the port index.
Although they're usually the same thing, EHL's DDI-D (port D) is
attached to PHY-A and SDEISR doesn't even have bits for a "D" output.
It's also possible that future platforms may map DDIs (the internal
display engine programming units) to PHYs (the output handling on the IO
side) in ways where port!=phy, so let's look at the PHY index by
default.

Fixes: 719d24002602 ("drm/i915/ehl: Enable DDI-D")
Cc: José Roberto de Souza <jose.souza at intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index ddf5bad1b969..59c5fd7bf27d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5477,14 +5477,12 @@ static bool bxt_digital_port_connected(struct intel_encoder *encoder)
 }
 
 static bool icl_combo_port_connected(struct drm_i915_private *dev_priv,
-				     struct intel_digital_port *intel_dig_port)
+				     enum phy phy)
 {
-	enum port port = intel_dig_port->base.port;
-
-	if (HAS_PCH_MCC(dev_priv) && port == PORT_C)
+	if (HAS_PCH_MCC(dev_priv) && phy == PHY_C)
 		return I915_READ(SDEISR) & SDE_TC_HOTPLUG_ICP(PORT_TC1);
 
-	return I915_READ(SDEISR) & SDE_DDI_HOTPLUG_ICP(port);
+	return I915_READ(SDEISR) & SDE_DDI_HOTPLUG_ICP(phy);
 }
 
 static bool icp_digital_port_connected(struct intel_encoder *encoder)
@@ -5494,7 +5492,7 @@ static bool icp_digital_port_connected(struct intel_encoder *encoder)
 	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
 
 	if (intel_phy_is_combo(dev_priv, phy))
-		return icl_combo_port_connected(dev_priv, dig_port);
+		return icl_combo_port_connected(dev_priv, phy);
 	else if (intel_phy_is_tc(dev_priv, phy))
 		return intel_tc_port_connected(dig_port);
 	else
-- 
2.23.0