[Intel-gfx] [PATCH 6/6] drm/i915/bxt: Fix irq_port for eDP

[Sonika Jindal]

From: Durgadoss R <durgadoss.r at intel.com>

Currently, HDMI hotplug with eDP as local panel is failing
because the HDMI hpd is detected as a long hpd for eDP; and is
thus rightfully ignored. But, it should really be handled as
an interrupt on port B for HDMI (due to BXT A1 platform having
HPD pins A and B swapped). This patch sets the irq_port[PORT_A]
to NULL in case eDP is on port A so that irq handler does not
treat it as a 'dig_port' interrupt.

Signed-off-by: Durgadoss R <durgadoss.r at intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c |   15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 4823184..fec51df 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3218,15 +3218,20 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
 			goto err;
 
 		intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
+		dev_priv->hotplug.irq_port[port] = intel_dig_port;
 		/*
 		 * On BXT A0/A1, sw needs to activate DDIA HPD logic and
 		 * interrupts to check the external panel connection.
+		 * If eDP is connected on port A, set irq_port to NULL
+		 * so that we do not assume an interrupt here as a
+		 * 'dig_port' interrupt.
 		 */
-		if (IS_BROXTON(dev_priv) && (INTEL_REVID(dev) < BXT_REVID_B0)
-					 && port == PORT_B)
-			dev_priv->hotplug.irq_port[PORT_A] = intel_dig_port;
-		else
-			dev_priv->hotplug.irq_port[port] = intel_dig_port;
+		if (IS_BROXTON(dev) && (INTEL_REVID(dev) < BXT_REVID_B0)) {
+			if (port == PORT_B)
+				dev_priv->hotplug.irq_port[PORT_A] = intel_dig_port;
+			else if (intel_encoder->type == INTEL_OUTPUT_EDP)
+				dev_priv->hotplug.irq_port[port] = NULL;
+		}
 	}
 
 	/* In theory we don't need the encoder->type check, but leave it just in
-- 
1.7.10.4