From: Paulo Zanoni <paulo.r.zan...@intel.com>

Otherwise, if the BIOS did anything wrong, our first I915_{READ,WRITE}
will give us "unclaimed regsiter" messages.

Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 11c7aa8..505d7eb 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1578,6 +1578,10 @@ int i915_driver_load(struct drm_device *dev, unsigned 
long flags)
        /* This must be called before any calls to HAS_PCH_* */
        intel_detect_pch(dev);
 
+       /* This must happen before any I915_{READ,WRITE}: */
+       if (IS_HASWELL(dev))
+               I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+
        intel_irq_init(dev);
        intel_gt_init(dev);
 
-- 
1.7.10.4

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