If the selective fetch is not optimal, use FBC

Bspec: 68881
Signed-off-by: Vinod Govindapillai <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c 
b/drivers/gpu/drm/i915/display/intel_fbc.c
index bde12fe62275..1c32d85dc688 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1202,8 +1202,15 @@ static int intel_fbc_check_plane(struct 
intel_atomic_state *state,
         * Bspec: 50422 HSD: 14010260002
         */
        if (DISPLAY_VER(i915) >= 12 && crtc_state->has_psr2) {
-               plane_state->no_fbc_reason = "PSR2 enabled";
-               return 0;
+               if (DISPLAY_VER(i915) >= 20)
+                       plane_state->no_fbc_reason =
+                               crtc_state->full_frame_fetch ? NULL :
+                                       "PSR2 selective fetch enabled";
+               else
+                       plane_state->no_fbc_reason = "PSR2 enabled";
+
+               if (plane_state->no_fbc_reason)
+                       return 0;
        }
 
        /* Wa_14016291713 */
-- 
2.34.1

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