@@ -39,6 +39,7 @@
*/
#include <drm/drm_fourcc.h>
+#include <linux/dmi.h>
#include "i915_drv.h"
#include "i915_trace.h"
@@ -1439,6 +1440,24 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv)
return 0;
}
+static int intel_fbc_vtd_callback(const struct dmi_system_id *id)
+{
+ DRM_DEBUG_KMS("Disabling FBC to prevent screen flicker on %s device\n", id->ident);
+ return 1;
+}
+
+static const struct dmi_system_id intel_fbc_vtd_detect[] = {
+ {
+ .callback = intel_fbc_vtd_callback,
+ .ident = "Google Nightfury",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Google"),
+ DMI_MATCH(DMI_BOARD_NAME, "Nightfury"),
+ },
+ },
+ { }
+};
+
static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv)
{
/* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
@@ -1450,6 +1469,9 @@ static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv)
return true;
}
+ if (dmi_check_system(intel_fbc_vtd_detect))
+ return true;
+
return false;
}
Customer report random display flicker issue on Nightfury board. And we found this problem might be caused by VT-d and FBC are both enabled. According to sighting report, it recommend to turn FBC off to workaround this kind of issue. This change refer to DMI BOARD_VENDOR and BOARD_NAME information to disable FBC. 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> Cc: Cooper Chiou <cooper.chiou@intel.com> Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com> v2: fix typo. --- drivers/gpu/drm/i915/display/intel_fbc.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)