[Intel-gfx] [PATCH 4/4] drm/i915/lnl: FBC is supported with per pixel alpha

[Vinod Govindapillai]

For LNL onwards, FBC can be supported on planes with per
pixel alpha

Bspec: 69560
Signed-off-by: Vinod Govindapillai <vinod.govindapil...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c 
b/drivers/gpu/drm/i915/display/intel_fbc.c
index 62f59630d410..f36eb8652d3c 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1224,7 +1224,8 @@ static int intel_fbc_check_plane(struct 
intel_atomic_state *state,
                return 0;
        }
 
-       if (plane_state->hw.pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE &&
+       if (DISPLAY_VER(i915) < 20 &&
+           plane_state->hw.pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE &&
            fb->format->has_alpha) {
                plane_state->no_fbc_reason = "per-pixel alpha not supported";
                return 0;
-- 
2.34.1