[PATCH 4/6] drm/i915/display: Selective fetch Y position on Region Early Transport

[Jouni Högander]

Selective fetch Y position differs when Region Early Transport is
used. Use formula from Bspec for this.

Bspec: 68927

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/skl_universal_plane.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index b7678b8a7f3d..1aa70fc35b9d 100644
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -1302,7 +1302,11 @@ static void icl_plane_update_sel_fetch_noarm(struct intel_plane *plane,
 
 	clip = &plane_state->psr2_sel_fetch_area;
 
-	val = (clip->y1 + plane_state->uapi.dst.y1) << 16;
+	if (crtc_state->enable_psr2_su_region_et)
+		y = max(0, plane_state->uapi.dst.y1 - crtc_state->psr2_su_area.y1);
+	else
+		y = (clip->y1 + plane_state->uapi.dst.y1);
+	val = y << 16;
 	val |= plane_state->uapi.dst.x1;
 	intel_de_write_fw(i915, SEL_FETCH_PLANE_POS(pipe, plane->id), val);
 
-- 
2.34.1