drm/i915: Don't display nonsensical values in i915_ddb_info on gen < 9
When playing around with debugfs and a HSW machine I noticed that we
were displaying some garbled value in i915_ddb_info. This debugfs file
is only meaningful for gen9+, so don't display anything on earlier
platforms.
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 6c16939..d0e445e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2743,6 +2743,9 @@
enum pipe pipe;
int plane;
+ if (INTEL_INFO(dev)->gen < 9)
+ return 0;
+
drm_modeset_lock_all(dev);
ddb = &dev_priv->wm.skl_hw.ddb;