[PATCH v3] drm/i915: VLV2 - Fix hotplug detect bits

[Todd Previte <tprevite@gmail.com>]

Add new definitions for hotplug live status bits for VLV2 since they're
in reverse order from the gen4x ones.

Changelog:
- Restored gen4 bit definitions
- Added new definitions for VLV2
- Added platform check for IS_VALLEYVIEW() in dp_detect to use the correct
  bit defintions

Signed-off-by: Todd Previte <tprevite@gmail.com>
---
 drivers/gpu/drm/i915/i915_reg.h | 11 ++++++++---
 drivers/gpu/drm/i915/intel_dp.c | 39 +++++++++++++++++++++++++++------------
 2 files changed, 35 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 2d77b51..0e65717 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2083,9 +2083,14 @@
  * Please check the detailed lore in the commit message for for experimental
  * evidence.
  */
-#define   PORTD_HOTPLUG_LIVE_STATUS               (1 << 29)
-#define   PORTC_HOTPLUG_LIVE_STATUS               (1 << 28)
-#define   PORTB_HOTPLUG_LIVE_STATUS               (1 << 27)
+/* VLV hot plug bits are different */
+#define   VLV_PORTD_HOTPLUG_LIVE_STATUS	(1 << 27)
+#define   VLV_PORTC_HOTPLUG_LIVE_STATUS	(1 << 28)
+#define   VLV_PORTB_HOTPLUG_LIVE_STATUS	(1 << 29)
+
+#define   PORTD_HOTPLUG_LIVE_STATUS		(1 << 29)
+#define   PORTC_HOTPLUG_LIVE_STATUS		(1 << 28)
+#define   PORTB_HOTPLUG_LIVE_STATUS		(1 << 27)
 #define   PORTD_HOTPLUG_INT_STATUS		(3 << 21)
 #define   PORTC_HOTPLUG_INT_STATUS		(3 << 19)
 #define   PORTB_HOTPLUG_INT_STATUS		(3 << 17)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 1386efb..1f080b2 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2946,18 +2946,33 @@ g4x_dp_detect(struct intel_dp *intel_dp)
 		return status;
 	}
 
-	switch (intel_dig_port->port) {
-	case PORT_B:
-		bit = PORTB_HOTPLUG_LIVE_STATUS;
-		break;
-	case PORT_C:
-		bit = PORTC_HOTPLUG_LIVE_STATUS;
-		break;
-	case PORT_D:
-		bit = PORTD_HOTPLUG_LIVE_STATUS;
-		break;
-	default:
-		return connector_status_unknown;
+	if (IS_VALLEYVIEW(dev)) {
+		switch (intel_dig_port->port) {
+		case PORT_B:
+			bit = VLV_PORTB_HOTPLUG_LIVE_STATUS;
+			break;
+		case PORT_C:
+			bit = VLV_PORTC_HOTPLUG_LIVE_STATUS;
+			break;
+		case PORT_D:
+			bit = VLV_PORTD_HOTPLUG_LIVE_STATUS;
+			break;
+		default:
+			return connector_status_unknown;
+	} else {
+		switch (intel_dig_port->port) {
+		case PORT_B:
+			bit = PORTB_HOTPLUG_LIVE_STATUS;
+			break;
+		case PORT_C:
+			bit = PORTC_HOTPLUG_LIVE_STATUS;
+			break;
+		case PORT_D:
+			bit = PORTD_HOTPLUG_LIVE_STATUS;
+			break;
+		default:
+			return connector_status_unknown;
+		}
 	}
 
 	if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0)
-- 
1.8.3.2