drm/i915: use gem_set_seqno() on hardware init

When machine was rebooted or module was reloaded,
gem_hw_init() set last_seqno to be identical to next_seqno.
This lead to situation that waits for first ever request
always passed immediately regardless if it was actually
executed.

Use gem_set_seqno() to be consistent how hw is
initialized on init, wrap and on resume.

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5226ebc..801f77e 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3941,8 +3941,6 @@ i915_gem_init_hw(struct drm_device *dev)
 
        i915_gem_init_swizzling(dev);
 
-       dev_priv->next_seqno = dev_priv->last_seqno = (u32)~0 - 0x1000;
-
        ret = intel_init_render_ring_buffer(dev);
        if (ret)
                return ret;
@@ -3959,6 +3957,10 @@ i915_gem_init_hw(struct drm_device *dev)
                        goto cleanup_bsd_ring;
        }
 
+       ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
+       if (ret)
+               return ret;
+
        /*
         * XXX: There was some w/a described somewhere suggesting loading
         * contexts before PPGTT.

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 9438bcd..dc6ae2f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1223,8 +1223,6 @@ static int intel_init_ring_buffer(struct drm_device *dev,
        if (IS_I830(ring->dev) || IS_845G(ring->dev))
                ring->effective_size -= 128;
 
-       intel_ring_init_seqno(ring, dev_priv->last_seqno);
-
        return 0;
 
 err_unmap: