| Message ID | 20200826071710.31689-1-shawn.c.lee@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] drm/i915/fbc: Disable fbc with VT-d also with cometlake | expand |
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c index 135f5e8a4d70..c99c4c84a0ed 100644 --- a/drivers/gpu/drm/i915/display/intel_fbc.c +++ b/drivers/gpu/drm/i915/display/intel_fbc.c @@ -1443,7 +1443,9 @@ static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv) { /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */ if (intel_vtd_active() && - (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))) { + (IS_SKYLAKE(dev_priv) || + IS_BROXTON(dev_priv) || + IS_CML_ULT(dev_priv))) { drm_info(&dev_priv->drm, "Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n"); return true;
Both VT-d and FBC enabled that caused display flicker issue very randomly. According to sighting report, it recommend to disable FBC to workaround this issue. v2: Specific this change for CML U series device. Using IS_CML_ULT() instead of IS_COMETLAKE(). Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: William Tseng <william.tseng@intel.com> Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com> --- drivers/gpu/drm/i915/display/intel_fbc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)