From: Damien Lespiau <damien.lespiau@intel.com>
Date: Wed, 3 Dec 2014 17:33:24 +0000 (+0000)
Subject: drm/i915: Don't display nonsensical values in i915_ddb_info on gen < 9
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2fcffe195ed3329082ce22f2118543871bfbbcf0;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 6c169392f701..d0e445eca9ce 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2743,6 +2743,9 @@ static int i915_ddb_info(struct seq_file *m, void *unused)
 	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;