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drm/i915: Limit i915_ring_test_irq debugfs to actual rings 

For simplicity in testing, only report known rings in the mask. This
allows userspace to try and trigger a missed irq on every ring and do a
comparison between i915_ring_test_irq and i915_ring_missed_irq to see if
any rings failed.

v2: Move the debug message to after the rings are selected (so that the
message accurately reflects reality)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466170505-8048-1-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
This commit is contained in:
Chris Wilson 2016-06-17 14:35:05 +01:00
parent 556ab7a6de
commit 3a122c2767
1 changed files with 1 additions and 8 deletions
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9
drivers/gpu/drm/i915/i915_debugfs.c
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@ -4877,17 +4877,10 @@ i915_ring_test_irq_set(void *data, u64 val)
{
struct drm_device *dev = data;
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
val &= INTEL_INFO(dev_priv)->ring_mask;
DRM_DEBUG_DRIVER("Masking interrupts on rings 0x%08llx\n", val);
/* Lock against concurrent debugfs callers */
ret = mutex_lock_interruptible(&dev->struct_mutex);
if (ret)
return ret;
dev_priv->gpu_error.test_irq_rings = val;
mutex_unlock(&dev->struct_mutex);
return 0;
}