Patch "drm/i915: more virtual south bridge detection" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

drm/i915: more virtual south bridge detection

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-i915-more-virtual-south-bridge-detection.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Gerd Hoffmann <[email protected]>
Date: Thu, 26 Nov 2015 12:03:51 +0100
Subject: drm/i915: more virtual south bridge detection

From: Gerd Hoffmann <[email protected]>

commit 39bfcd5235e07e95ad3e70eab8e0b85db181de9e upstream.

Commit "30c964a drm/i915: Detect virtual south bridge" detects and handles the southbridge emulated by vmware esx. Add the ich9 south bridge emulated by 'qemu -M q35'.

---
 drivers/gpu/drm/i915/i915_drv.c |    3 ++-
 drivers/gpu/drm/i915/i915_drv.h |    1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

@@ -531,7 +531,8 @@ void intel_detect_pch(struct drm_device
 				dev_priv->pch_type = PCH_SPT;
 				DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
 				WARN_ON(!IS_SKYLAKE(dev));
-			} else if (id == INTEL_PCH_P2X_DEVICE_ID_TYPE) {
+			} else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
+				   (id == INTEL_PCH_QEMU_DEVICE_ID_TYPE)) {
 				dev_priv->pch_type = intel_virt_detect_pch(dev);
 			} else
 				continue;

@@ -2614,6 +2614,7 @@ struct drm_i915_cmd_table {
 #define INTEL_PCH_SPT_DEVICE_ID_TYPE		0xA100
 #define INTEL_PCH_SPT_LP_DEVICE_ID_TYPE		0x9D00
 #define INTEL_PCH_P2X_DEVICE_ID_TYPE		0x7100
+#define INTEL_PCH_QEMU_DEVICE_ID_TYPE		0x2900 /* qemu q35 has 2918 */
 
 #define INTEL_PCH_TYPE(dev) (__I915__(dev)->pch_type)
 #define HAS_PCH_SPT(dev) (INTEL_PCH_TYPE(dev) == PCH_SPT)

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/drm-i915-more-virtual-south-bridge-detection.patch queue-4.4/drm-i915-refine-qemu-south-bridge-detection.patch