[Intel-gfx] [PATCH] drm/i915/fbc: Disable fbc with VT-d also with kbl and cfl

[Mika Kuoppala]

Using fbc with VT-d flickers also on kbl and cfl.

Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: <stable at vger.kernel.org> # v4.9+
Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_fbc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 74d425c700ef..a149f08c1b79 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -1275,9 +1275,10 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv)
 
 static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv)
 {
-	/* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
+	/* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt,kbl,cfl */
 	if (intel_vtd_active() &&
-	    (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))) {
+	    (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv) ||
+	     IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv))) {
 		DRM_INFO("Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n");
 		return true;
 	}
-- 
2.17.1