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drm/i915: add 'reset' parameter

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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>
This commit is contained in:
Chris Wilson 2010-12-23 13:33:15 +00:00
parent a0fa62d3b6
commit d78cb50baa
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/i915/i915_drv.c
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@ -49,6 +49,9 @@ module_param_named(powersave, i915_powersave, int, 0600);
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 @@ int i915_reset(struct drm_device *dev, u8 flags)
bool need_display = true;
int ret;
if (!i915_try_reset)
return 0;
if (!mutex_trylock(&dev->struct_mutex))
return -EBUSY;