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authorGerd Hoffmann <kraxel@redhat.com>2016-01-25 12:02:28 +0100
committerJani Nikula <jani.nikula@intel.com>2016-01-29 09:15:03 +0200
commitf2e305108faba0c85eb4ba4066599decb675117e (patch)
tree8ab301a6ca8f031af0025bcf27a7b9e419d4e948
parent428398e44a2762875c01a4d5c18932f1e84fdc17 (diff)
drm/i915: refine qemu south bridge detectiondrm-intel-fixes-2016-02-04
The test for the qemu q35 south bridge added by commit "39bfcd52 drm/i915: more virtual south bridge detection" also matches on real hardware. Having the check for virtual systems last in the list is not enough to avoid that ... Refine the check by additionally verifying the pci subsystem id to see whenever it *really* is qemu. [ v2: fix subvendor tyops ] Reported-and-tested-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Tested-by: Bruno Wolff III <bruno@wolff.to> Cc: drm-intel-fixes@lists.freedesktop.org Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1453719748-10944-1-git-send-email-kraxel@redhat.com (cherry picked from commit 1e859111c128265f8d62b39ff322e42b1ddb5a20)
-rw-r--r--drivers/gpu/drm/i915/i915_drv.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 3ac616d7363b..f357058c74d9 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -501,7 +501,9 @@ void intel_detect_pch(struct drm_device *dev)
WARN_ON(!IS_SKYLAKE(dev) &&
!IS_KABYLAKE(dev));
} else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
- (id == INTEL_PCH_QEMU_DEVICE_ID_TYPE)) {
+ ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
+ pch->subsystem_vendor == 0x1af4 &&
+ pch->subsystem_device == 0x1100)) {
dev_priv->pch_type = intel_virt_detect_pch(dev);
} else
continue;

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