[PATCH v1] drm/i915/display: implement wa_14022269668

[Vinod Govindapillai]

Woraround recommend programming the fbc_stride for bmg always.
Display driver handles the need to program the fbc stride using
the override stride. So ensure that we always get the override
stride in case of bmg

Bspec: 74212
Signed-off-by: Vinod Govindapillai <vinod.govindapillai at intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index e89cee323d8b..970f8c96cc85 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -252,9 +252,12 @@ static u16 intel_fbc_override_cfb_stride(const struct intel_plane_state *plane_s
 	 * Gen9 hw miscalculates cfb stride for linear as
 	 * PLANE_STRIDE*512 instead of PLANE_STRIDE*64, so
 	 * we always need to use the override there.
+	 *
+	 * wa_14022269668 For bmg, always program the FBC_STRIDE before fbc enable
 	 */
 	if (stride != stride_aligned ||
-	    (DISPLAY_VER(display) == 9 && fb->modifier == DRM_FORMAT_MOD_LINEAR))
+	    (DISPLAY_VER(display) == 9 && fb->modifier == DRM_FORMAT_MOD_LINEAR) ||
+	    display->platform.battlemage)
 		return stride_aligned * 4 / 64;
 
 	return 0;
-- 
2.43.0