Commit 1e859111 authored by Gerd Hoffmann's avatar Gerd Hoffmann Committed by Jani Nikula

drm/i915: refine qemu south bridge detection

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: default avatarBjørn Mork <bjorn@mork.no>
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Tested-by: default avatarBruno Wolff III <bruno@wolff.to>
Cc: drm-intel-fixes@lists.freedesktop.org
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453719748-10944-1-git-send-email-kraxel@redhat.com
parent b16bb01f
......@@ -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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