From 809378196bb449fe30d0ca15a990965fc553f9f5 Mon Sep 17 00:00:00 2001
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Date: Thu, 8 Jun 2017 08:49:59 -0700
Subject: [PATCH] drm/i915/cfl: Coffee Lake uses CNP PCH.
Git-commit: 809378196bb449fe30d0ca15a990965fc553f9f5
Patch-mainline: v4.13-rc1
References: FATE#322643 bsc#1055900

So let's force it on the virtual detection.

Also it is still the only silicon for now on this PCH,
so WARN otherwise.

V2: Rebased on top of Cannonlake and added the missed    debug message as pointed by DK.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1496937000-8450-2-git-send-email-rodrigo.vivi@intel.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/i915_drv.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -139,8 +139,9 @@ static enum intel_pch intel_virt_detect_
 	} else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
 		ret = PCH_SPT;
 		DRM_DEBUG_KMS("Assuming SunrisePoint PCH\n");
-	} else if (IS_CANNONLAKE(dev_priv)) {
+	} else if (IS_COFFEELAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
 		ret = PCH_CNP;
+		DRM_DEBUG_KMS("Assuming CannonPoint PCH\n");
 	}
 
 	return ret;
@@ -224,11 +225,13 @@ static void intel_detect_pch(struct drm_
 			} else if (id == INTEL_PCH_CNP_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_CNP;
 				DRM_DEBUG_KMS("Found CannonPoint PCH\n");
-				WARN_ON(!IS_CANNONLAKE(dev_priv));
+				WARN_ON(!IS_CANNONLAKE(dev_priv) &&
+					!IS_COFFEELAKE(dev_priv));
 			} else if (id_ext == INTEL_PCH_CNP_LP_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_CNP;
 				DRM_DEBUG_KMS("Found CannonPoint LP PCH\n");
-				WARN_ON(!IS_CANNONLAKE(dev_priv));
+				WARN_ON(!IS_CANNONLAKE(dev_priv) &&
+					!IS_COFFEELAKE(dev_priv));
 			} else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
 				   (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
 				   ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&