[Intel-gfx] [PATCH] Copy highest enabled wm level to disabled wm levels for gen >= 12

[Stanislav Lisovskiy]

There was a specific SW workaround requested, which should prevent
some watermark issues happening, which requires copying highest
enabled wm level to those disabled wm levels(bit 31 is of course
still needs to be cleared).

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
---
 drivers/gpu/drm/i915/display/skl_watermark.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index ae4e9e680c2e3..b12e11cd6e579 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -1591,6 +1591,13 @@ skl_crtc_allocate_plane_ddb(struct intel_atomic_state *state,
 				wm->wm[level].lines = wm->wm[0].lines;
 				wm->wm[level].ignore_lines = wm->wm[0].ignore_lines;
 			}
+
+			/* Wa_14017887344 */
+			if (DISPLAY_VER(i915) >= 12 && level > 0) {
+				wm->wm[level].blocks = wm->wm[level - 1].blocks;
+				wm->wm[level].lines = wm->wm[level - 1].lines;
+				wm->wm[level].ignore_lines = wm->wm[level - 1].ignore_lines;
+			}
 		}
 	}
 
-- 
2.37.3