From df558de16c8a90e44ffb405e9224980b15158c93 Mon Sep 17 00:00:00 2001
From: Xudong Hao <xudong.hao@intel.com>
Date: Fri, 27 Apr 2012 09:16:46 -0600
Subject: [PATCH] PCI: work around IvyBridge internal graphics FLR erratum

For IvyBridge Mobile platform, a system hang may occur if a FLR (Function
Level Reset) is asserted to internal graphics.

This quirk is a workaround for the IVB FLR errata issue.  We are
disabling the FLR reset handshake between the PCH and CPU display, then
manually powering down the panel power sequencing and resetting the PCH
display.

Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Kay, Allen M <allen.m.kay@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
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