drm/i915/wm: warn about ilk_wm_sanitize() on display ver 9+

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

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230215141910.433043-2-jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/display/i9xx_wm.c b/drivers/gpu/drm/i915/display/i9xx_wm.c
index f76ac64..50cdfe1 100644 (file)
--- 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;