drm/i915: add 'reset' parameter
When bringing up new hardware, or otherwise experimenting, GPU hangs are
a way of life. However, the automatic GPU reset can do more harm than
good under these circumstances, as we may wish to capture a full trace for
debugging.
Based on a patch by Zhenyu Wang.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 8724933..2913496 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -49,6 +49,9 @@
unsigned int i915_lvds_downclock = 0;
module_param_named(lvds_downclock, i915_lvds_downclock, int, 0400);
+bool i915_try_reset = true;
+module_param_named(reset, i915_try_reset, bool, 0600);
+
static struct drm_driver driver;
extern int intel_agp_enabled;
@@ -475,6 +478,9 @@
bool need_display = true;
int ret;
+ if (!i915_try_reset)
+ return 0;
+
if (!mutex_trylock(&dev->struct_mutex))
return -EBUSY;