The sanitization should be limited to PCH split platforms up to display
version 8. Warn and bail out otherwise.

Signed-off-by: Jani Nikula <[email protected]>
---
 drivers/gpu/drm/i915/display/i9xx_wm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/i9xx_wm.c 
b/drivers/gpu/drm/i915/display/i9xx_wm.c
index f76ac64ebd71..50cdfe11192e 100644
--- a/drivers/gpu/drm/i915/display/i9xx_wm.c
+++ b/drivers/gpu/drm/i915/display/i9xx_wm.c
@@ -3437,6 +3437,9 @@ void ilk_wm_sanitize(struct drm_i915_private *dev_priv)
        if (!dev_priv->display.funcs.wm->optimize_watermarks)
                return;
 
+       if (drm_WARN_ON(&dev_priv->drm, DISPLAY_VER(dev_priv) >= 9))
+               return;
+
        state = drm_atomic_state_alloc(&dev_priv->drm);
        if (drm_WARN_ON(&dev_priv->drm, !state))
                return;
-- 
2.34.1

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