drm/i915: Detect virtual south bridge

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Virtualized systems often use a virtual P2X4 south bridge.
Detect this in intel_detect_pch and make a best guess as to which PCH
we should be using.

This was seen on vmware esxi hypervisor. When passing the graphics device
through to a guest, it can not pass through the PCH. Instead it simulates
a P2X4 southbridge.

Signed-off-by: Robert Beckett <robert.beckett@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Robert Beckett 2015-08-28 13:10:22 +01:00 • committed by Daniel Vetter

parent 44cc6c08da

commit 30c964a6cb

2 changed files with 31 additions and 0 deletions

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drivers/gpu/drm/i915/i915_drv.c

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1

drivers/gpu/drm/i915/i915_drv.h

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