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authorFeng, Boqun <boqun.feng@intel.com>2011-05-16 16:02:39 +0800
committerKeith Packard <keithp@keithp.com>2011-05-16 12:54:05 -0700
commit5bfa1063a775836a84f97e4df863fc36e1f856ad (patch)
tree1e148827c71e7f82e80a3dbe30676267f5d72947
parent645c62a5e95a5f9a8e0d0627446bbda4ee042024 (diff)
downloadlinux-5bfa1063a775836a84f97e4df863fc36e1f856ad.tar.bz2
drm/i915: fix user irq miss in BSD ring on g4x
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>
-rw-r--r--drivers/gpu/drm/i915/intel_ringbuffer.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 3971b5e6ad60..69cdbcd6e5b7 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -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