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drm/i915/icl: Handle rps interrupts without irq lock

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Unlike previous gens, we already hold the irq_lock on
entering the rps handler so we can't use it as it is.

Make a gen11 specific rps interrupt handler without
locking.

v2: return early (Chris)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190410132124.21795-1-mika.kuoppala@linux.intel.com
This commit is contained in:
Mika Kuoppala 2019-04-10 16:21:23 +03:00 committed by Chris Wilson
parent 4bdc42094d
commit a087bafeea
1 changed files with 20 additions and 1 deletions
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21
drivers/gpu/drm/i915/i915_irq.c
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@ -1796,6 +1796,25 @@ static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
/* The RPS events need forcewake, so we add them to a work queue and mask their
* IMR bits until the work is done. Other interrupts can be processed without
* the work queue. */
static void gen11_rps_irq_handler(struct drm_i915_private *i915, u32 pm_iir)
{
struct intel_rps *rps = &i915->gt_pm.rps;
const u32 events = i915->pm_rps_events & pm_iir;
lockdep_assert_held(&i915->irq_lock);
if (unlikely(!events))
return;
gen6_mask_pm_irq(i915, events);
if (!rps->interrupts_enabled)
return;
rps->pm_iir |= events;
schedule_work(&rps->work);
}
static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
{
struct intel_rps *rps = &dev_priv->gt_pm.rps;
@ -2949,7 +2968,7 @@ gen11_other_irq_handler(struct drm_i915_private * const i915,
const u8 instance, const u16 iir)
{
if (instance == OTHER_GTPM_INSTANCE)
return gen6_rps_irq_handler(i915, iir);
return gen11_rps_irq_handler(i915, iir);
WARN_ONCE(1, "unhandled other interrupt instance=0x%x, iir=0x%x\n",
instance, iir);