drm/i915: Move legacy breadcrumb out of the reserved status page area

Addresses in the hardware status page below index 0x20 are reserved for use
by the hardware. The legacy breadcrumb was sitting at index 5. Move it to
index 0x21, and make sure everyone uses the defined value instead of
hard-coded constants.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index a75345af62e..82752d6177a 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -212,12 +212,10 @@ static int i915_emit_irq(struct drm_device * dev)
         if (dev_priv->sarea_priv)
                 dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
 
-        BEGIN_LP_RING(6);
+        BEGIN_LP_RING(4);
         OUT_RING(MI_STORE_DWORD_INDEX);
-        OUT_RING(5 << MI_STORE_DWORD_INDEX_SHIFT);
+        OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
         OUT_RING(dev_priv->counter);
-        OUT_RING(0);
-        OUT_RING(0);
         OUT_RING(MI_USER_INTERRUPT);
         ADVANCE_LP_RING();