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drm/i915: fix user irq miss in BSD ring on g4x

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On g4x, user interrupt in BSD ring is missed.
This is because though g4x and ironlake share the same bsd_ring,
their interrupt control interfaces have _two_ differences.

1.different irq enable/disable functions:
On g4x are i915_enable_irq and i915_disable_irq.
On ironlake are ironlake_enable_irq and ironlake_disable_irq.
2.different irq flag:
On g4x user interrupt flag in BSD ring on is I915_BSD_USER_INTERRUPT.
On ironlake is GT_BSD_USER_INTERRUPT

Old bsd_ring_get/put_irq call ring_get_irq and ring_get_irq.
ring_get_irq and ring_put_irq only call ironlake_enable/disable_irq.
So comes the irq miss on g4x.

To fix this, as other rings' code do, conditionally call different
functions(i915_enable/disable_irq and ironlake_enable/disable_irq)
and use different interrupt flags in bsd_ring_get/put_irq.

Signed-off-by: Feng, Boqun <boqun.feng@intel.com>
Reviewed-by: Xiang, Haihao <haihao.xiang@intel.com>
Cc: stable@kernel.org
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Feng, Boqun 2011-05-16 16:02:39 +08:00 committed by Keith Packard
parent 645c62a5e9
commit 5bfa1063a7
1 changed files with 27 additions and 2 deletions
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29
drivers/gpu/drm/i915/intel_ringbuffer.c
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@ -687,12 +687,37 @@ gen6_ring_put_irq(struct intel_ring_buffer *ring, u32 gflag, u32 rflag)
static bool
bsd_ring_get_irq(struct intel_ring_buffer *ring)
{
return ring_get_irq(ring, GT_BSD_USER_INTERRUPT);
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
if (!dev->irq_enabled)
return false;
spin_lock(&ring->irq_lock);
if (ring->irq_refcount++ == 0) {
if (IS_G4X(dev))
i915_enable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
else
ironlake_enable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
}
spin_unlock(&ring->irq_lock);
return true;
}
static void
bsd_ring_put_irq(struct intel_ring_buffer *ring)
{
ring_put_irq(ring, GT_BSD_USER_INTERRUPT);
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
spin_lock(&ring->irq_lock);
if (--ring->irq_refcount == 0) {
if (IS_G4X(dev))
i915_disable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
else
ironlake_disable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
}
spin_unlock(&ring->irq_lock);
}
static int