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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-24 15:20:21 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-24 15:56:01 +0000 |
| commit | f747026c2b350fdb3c2d6fad51b7ebed4851183e (patch) | |
| tree | a47114a16bbe107729714893ee08806522d9ce6b /drivers/gpu/drm/i915/i915_irq.c | |
| parent | 538b257dae83268cc3536fb4c4ab4f57901d449d (diff) | |
| download | op-kernel-dev-f747026c2b350fdb3c2d6fad51b7ebed4851183e.zip op-kernel-dev-f747026c2b350fdb3c2d6fad51b7ebed4851183e.tar.gz | |
drm/i915: Only run execlist context-switch handler after an interrupt
Mark when we run the execlist tasklet following the interrupt, so we
don't probe a potentially uninitialised register when submitting the
contexts multiple times before the hardware responds.
v2: Use a shared engine->irq_posted
v3: Always use locked bitops to be sure of atomicity wrt to other bits
in the mask.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170124152021.26587-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 7e087c3..3f3c908 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1349,8 +1349,11 @@ gen8_cs_irq_handler(struct intel_engine_cs *engine, u32 iir, int test_shift) { if (iir & (GT_RENDER_USER_INTERRUPT << test_shift)) notify_ring(engine); - if (iir & (GT_CONTEXT_SWITCH_INTERRUPT << test_shift)) - tasklet_schedule(&engine->irq_tasklet); + + if (iir & (GT_CONTEXT_SWITCH_INTERRUPT << test_shift)) { + set_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted); + tasklet_hi_schedule(&engine->irq_tasklet); + } } static irqreturn_t gen8_gt_irq_ack(struct drm_i915_private *dev_priv, |
