[Intel-gfx] [PATCH] drm/i915/hotplug: Use phy to get the hpd_pin instead of the port

[Vivek Kasireddy]

On some platforms such as Elkhart Lake, although we may use DDI D
to drive a connector, we have to use PHY A (Combo Phy PORT A) to
detect the hotplug interrupts as per the spec because there is no
one-to-one mapping between DDIs and PHYs. Therefore, use the
function intel_port_to_phy() which contains the logic for such
mapping(s) to find the correct hpd_pin.

This change should not affect other platforms as there is always
a one-to-one mapping between DDIs and PHYs.

Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: José Roberto de Souza <jose.souza at intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy at intel.com>
---
 drivers/gpu/drm/i915/display/intel_hotplug.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c
index 042d98bae1ea..491f6b6f920d 100644
--- a/drivers/gpu/drm/i915/display/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
@@ -89,7 +89,8 @@
 enum hpd_pin intel_hpd_pin_default(struct drm_i915_private *dev_priv,
 				   enum port port)
 {
-	switch (port) {
+	enum phy phy = intel_port_to_phy(dev_priv, port);
+	switch (phy) {
 	case PORT_A:
 		return HPD_PORT_A;
 	case PORT_B:
@@ -111,7 +112,7 @@ enum hpd_pin intel_hpd_pin_default(struct drm_i915_private *dev_priv,
 	case PORT_I:
 		return HPD_PORT_I;
 	default:
-		MISSING_CASE(port);
+		MISSING_CASE(phy);
 		return HPD_NONE;
 	}
 }
-- 
2.21.1