drm/i915: Kill PCH_KBP

For us KBP is 100% identical to SPT. Kill the redundant enum
value. Also bspec doesn't talk about KBP either, so this might
avoid some confusion when cross checking the code against the
spec.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190506152627.20283-1-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/i915_drv.c

@@ -195,7 +195,8 @@ intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
 		DRM_DEBUG_KMS("Found Kaby Lake PCH (KBP)\n");
 		WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv) &&
 			!IS_COFFEELAKE(dev_priv));
-		return PCH_KBP;
+		/* KBP is SPT compatible */
+		return PCH_SPT;
 	case INTEL_PCH_CNP_DEVICE_ID_TYPE:
 		DRM_DEBUG_KMS("Found Cannon Lake PCH (CNP)\n");
 		WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_COFFEELAKE(dev_priv));

drivers/gpu/drm/i915/i915_drv.h

@@ -532,8 +532,7 @@ enum intel_pch {
 	PCH_IBX,	/* Ibexpeak PCH */
 	PCH_CPT,	/* Cougarpoint/Pantherpoint PCH */
 	PCH_LPT,	/* Lynxpoint/Wildcatpoint PCH */
-	PCH_SPT,        /* Sunrisepoint PCH */
-	PCH_KBP,        /* Kaby Lake PCH */
+	PCH_SPT,        /* Sunrisepoint/Kaby Lake PCH */
 	PCH_CNP,        /* Cannon/Comet Lake PCH */
 	PCH_ICP,	/* Ice Lake PCH */
 };
@@ -2629,7 +2628,6 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 #define INTEL_PCH_ID(dev_priv) ((dev_priv)->pch_id)
 #define HAS_PCH_ICP(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_ICP)
 #define HAS_PCH_CNP(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_CNP)
-#define HAS_PCH_KBP(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_KBP)
 #define HAS_PCH_SPT(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_SPT)
 #define HAS_PCH_LPT(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_LPT)
 #define HAS_PCH_LPT_LP(dev_priv) \

drivers/gpu/drm/i915/intel_gmbus.c

@@ -581,8 +581,7 @@ do_gmbus_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num,
 	/* Display WA #0868: skl,bxt,kbl,cfl,glk,cnl */
 	if (IS_GEN9_LP(dev_priv))
 		bxt_gmbus_clock_gating(dev_priv, false);
-	else if (HAS_PCH_SPT(dev_priv) ||
-		 HAS_PCH_KBP(dev_priv) || HAS_PCH_CNP(dev_priv))
+	else if (HAS_PCH_SPT(dev_priv) || HAS_PCH_CNP(dev_priv))
 		pch_gmbus_clock_gating(dev_priv, false);
 
 retry:
@@ -691,8 +690,7 @@ do_gmbus_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num,
 	/* Display WA #0868: skl,bxt,kbl,cfl,glk,cnl */
 	if (IS_GEN9_LP(dev_priv))
 		bxt_gmbus_clock_gating(dev_priv, true);
-	else if (HAS_PCH_SPT(dev_priv) ||
-		 HAS_PCH_KBP(dev_priv) || HAS_PCH_CNP(dev_priv))
+	else if (HAS_PCH_SPT(dev_priv) || HAS_PCH_CNP(dev_priv))
 		pch_gmbus_clock_gating(dev_priv, true);
 
 	return ret;