[PATCH] drm/i915: Update bits to check in device class from VBT to detect eDP

[Shobhit Kumar <shobhit.kumar@intel.com>]

The DEVICE_TYPE_eDP has been changed to 0x1806 in case of BYT which
can causes wrong detection failures for eDP. Reduce the number of bits
of interest in DEVICE_TYPE_eDP_BITS to just check most relevant and
conclusive ones and ensure they are set in device_class from VBT. This
will ensure that eDP detection works across platforms

Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
---
 drivers/gpu/drm/i915/intel_bios.h | 10 +---------
 drivers/gpu/drm/i915/intel_dp.c   |  4 ++--
 2 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index b986677..30d02b7 100644
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -710,16 +710,8 @@ int intel_parse_bios(struct drm_device *dev);
  */
 #define DEVICE_TYPE_eDP_BITS \
 	(DEVICE_TYPE_INTERNAL_CONNECTOR | \
-	 DEVICE_TYPE_NOT_HDMI_OUTPUT | \
-	 DEVICE_TYPE_MIPI_OUTPUT | \
-	 DEVICE_TYPE_COMPOSITE_OUTPUT | \
-	 DEVICE_TYPE_DUAL_CHANNEL | \
-	 DEVICE_TYPE_LVDS_SINGALING | \
-	 DEVICE_TYPE_TMDS_DVI_SIGNALING | \
-	 DEVICE_TYPE_VIDEO_SIGNALING | \
 	 DEVICE_TYPE_DISPLAYPORT_OUTPUT | \
-	 DEVICE_TYPE_DIGITAL_OUTPUT | \
-	 DEVICE_TYPE_ANALOG_OUTPUT)
+	 DEVICE_TYPE_DIGITAL_OUTPUT)
 
 /* define the DVO port for HDMI output type */
 #define		DVO_B		1
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index dad3780..68f7380 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3842,8 +3842,8 @@ bool intel_dp_is_edp(struct drm_device *dev, enum port port)
 		p_child = dev_priv->vbt.child_dev + i;
 
 		if (p_child->common.dvo_port == port_mapping[port] &&
-		    (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
-		    (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
+		    ((p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
+		     DEVICE_TYPE_eDP_BITS))
 			return true;
 	}
 	return false;
-- 
1.9.1