| Message ID | 20180808102713.32414-1-chris@chris-wilson.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/i915: Missed interrupt simulation is no more, tell the world | expand |
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index f9ce35da4123..881bd60bc820 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -4097,6 +4097,17 @@ i915_ring_test_irq_set(void *data, u64 val) { struct drm_i915_private *i915 = data; + /* GuC keeps the user interrupt permanently enabled for submission */ + if (USES_GUC_SUBMISSION(i915)) + return -ENODEV; + + /* + * From icl, we can no longer individually mask interrupt generation + * from each engine. + */ + if (INTEL_GEN(i915) >= 11) + return -ENODEV; + val &= INTEL_INFO(i915)->ring_mask; DRM_DEBUG_DRIVER("Masking interrupts on rings 0x%08llx\n", val);
Using the guc, we cannot disable the user interrupt generation as we use it for driving submission. And from Icelake, we no longer have the ability to individually mask interrupt generation from each engine, disabling our ability to fake missed interrupts. In both cases, report back to userspace that the missed interrupt generator is no longer available. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> --- drivers/gpu/drm/i915/i915_debugfs.c | 11 +++++++++++ 1 file changed, 11 insertions(+)