[Intel-gfx] [PATCH] drm/i915/fbc: Disable FBC when VT-d is enabled

[Arun R Murthy]

The WaFbcTurnOffFbcWhenHyperVisorIsUsed is applicable for Gen9 and
Gen10 platforms.

Bspec: 0852

v2: Updated commit msg and corrected Bspec format(Jani N)

Signed-off-by: Arun R Murthy <arun.r.murthy at intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index b5ee5ea0d010..5e3ef03832f2 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1652,9 +1652,9 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *i915)
 
 static bool need_fbc_vtd_wa(struct drm_i915_private *i915)
 {
-	/* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
+	/* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt,cnl,kbl */
 	if (i915_vtd_active(i915) &&
-	    (IS_SKYLAKE(i915) || IS_BROXTON(i915))) {
+	    ((DISPLAY_VER(i915) == 9) || DISPLAY_VER(i915) == 10)) {
 		drm_info(&i915->drm,
 			 "Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n");
 		return true;
-- 
2.25.1