[Bug 101111] [Regression BDW] backlight flickering/display artifacting on Broadwell integrated graphics with 4.12-rc1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101111

--- Comment #48 from Radhakrishna Sripada <radhakrishna.sripada at intel.com> ---
Can you try and see if this patch fixes the issue?
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index d3e5fdf0d2fa..ef6e32573cab 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5557,6 +5557,11 @@ void intel_edp_drrs_enable(struct intel_dp *intel_dp,
                return;
        }

+       if (dev_priv->psr.enabled == intel_dp) {
+               DRM_DEBUG_KMS("PSR active. Disabling DRRS.\n");
+               return;
+       }
+
        mutex_lock(&dev_priv->drrs.mutex);
        if (WARN_ON(dev_priv->drrs.dp)) {
                DRM_ERROR("DRRS already enabled\n");

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