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| author | Chris Wilson | 2018-06-27 22:13:02 +0200 |
|---|---|---|
| committer | Chris Wilson | 2018-06-28 21:56:35 +0200 |
| commit | 69dc4d003e3b7c262fd5fea3f25852e853eb6d4f (patch) | |
| tree | 2158a840ce34c4a7fd3563bd2380428a34549f74 /drivers/gpu/drm/i915/i915_irq.c | |
| parent | drm/i915: Reduce spinlock hold time during notify_ring() interrupt (diff) | |
| download | kernel-qcow2-linux-69dc4d003e3b7c262fd5fea3f25852e853eb6d4f.tar.gz kernel-qcow2-linux-69dc4d003e3b7c262fd5fea3f25852e853eb6d4f.tar.xz kernel-qcow2-linux-69dc4d003e3b7c262fd5fea3f25852e853eb6d4f.zip | |
drm/i915: Only trigger missed-seqno checking next to boundary
If we have more interrupts pending (because we know there are more
breadcrumb signals before the completion), then we do not need to
trigger an irq_seqno_barrier or even wakeup the task on this interrupt
as there will be another. To allow some margin of error (we are trying
to work around incoherent seqno after all), we wakeup the breadcrumb
before the target as well as on the target.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180627201304.15817-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 8893e795f672..4f137eeaf395 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1191,7 +1191,8 @@ static void notify_ring(struct intel_engine_cs *engine) tsk = wait->tsk; } else { - if (engine->irq_seqno_barrier) { + if (engine->irq_seqno_barrier && + i915_seqno_passed(seqno, wait->seqno - 1)) { set_bit(ENGINE_IRQ_BREADCRUMB, &engine->irq_posted); tsk = wait->tsk; |