[Intel-gfx] [PATCH v1 2/2] drm/i915/xe2lpd: prefer FBC for full frame fetch in PSR2

[Vinod Govindapillai]

If the selective fetch is not optimal, use FBC

Bspec: 68881
Signed-off-by: Vinod Govindapillai <vinod.govindapillai at intel.com>
---
 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