[PATCH 3/5] drm/i915: Kconfig for extra driver debugging

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From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

v2: Added a submenu based on an idea by Chris Wilson.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
---
 drivers/gpu/drm/i915/Kconfig       |  6 ++++++
 drivers/gpu/drm/i915/Kconfig.debug | 12 ++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 drivers/gpu/drm/i915/Kconfig.debug

diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index 20a5d0455e19..29a32b11953b 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -56,3 +56,9 @@ config DRM_I915_USERPTR
 	  selected to enabled full userptr support.
 
 	  If in doubt, say "Y".
+
+menu "drm/i915 Debugging"
+depends on DRM_I915
+depends on EXPERT
+source drivers/gpu/drm/i915/Kconfig.debug
+endmenu
diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug
new file mode 100644
index 000000000000..649a562ddf17
--- /dev/null
+++ b/drivers/gpu/drm/i915/Kconfig.debug
@@ -0,0 +1,12 @@
+config DRM_I915_DEBUG
+        bool "Enable additional driver debugging"
+        depends on DRM_I915
+        default n
+        help
+          Choose this option to turn on extra driver debugging that may affect
+          performance but will catch some internal issues.
+
+          Recommended for driver developers only.
+
+          If in doubt, say "N".
+
-- 
1.9.1

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