On this baytrail NUC I would see:
*ERROR* conflict detected with stolen region: [0xbb000000 - 0xbf000000]
Since stolen region is not setup, dev_priv->mm.stolen would not be initialized, which results that vlv_pctx is not allocated in valleyview_setup_pctx() which results in things going BOOM in valleyview_check_pctx().
Things seem to work out much better if we check for NULL ptr first.
Signed-off-by: Rob Clark robdclark@gmail.com --- drivers/gpu/drm/i915/intel_pm.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 45f71e6..bba8901 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4185,6 +4185,9 @@ static void valleyview_check_pctx(struct drm_i915_private *dev_priv) { unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
+ if (!dev_priv->vlv_pctx) + return; + WARN_ON(pctx_addr != dev_priv->mm.stolen_base + dev_priv->vlv_pctx->stolen->start); }