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drm/i915/gen8: Re-order init pipe_control in lrc mode 

Some of the WA applied using WA batch buffers perform writes to scratch page.
In the current flow WA are initialized before scratch obj is allocated.
This patch reorders intel_init_pipe_control() to have a valid scratch obj
before we initialize WA.

v2: Check for valid scratch page before initializing WA as some of them
perform writes to it.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Arun Siluvery 2015-06-19 18:37:11 +01:00 committed by Daniel Vetter
parent 17ee950df3
commit c4db759919
1 changed files with 11 additions and 3 deletions
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14
drivers/gpu/drm/i915/intel_lrc.c
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@ -1224,6 +1224,12 @@ static int intel_init_workaround_bb(struct intel_engine_cs *ring)
WARN_ON(ring->id != RCS);
/* some WA perform writes to scratch page, ensure it is valid */
if (ring->scratch.obj == NULL) {
DRM_ERROR("scratch page not allocated for %s\n", ring->name);
return -EINVAL;
}
ret = lrc_setup_wa_ctx_obj(ring, PAGE_SIZE);
if (ret) {
DRM_DEBUG_DRIVER("Failed to setup context WA page: %d\n", ret);
@ -1658,7 +1664,8 @@ static int logical_render_ring_init(struct drm_device *dev)
ring->emit_bb_start = gen8_emit_bb_start;
ring->dev = dev;
ret = logical_ring_init(dev, ring);
ret = intel_init_pipe_control(ring);
if (ret)
return ret;
@ -1673,9 +1680,10 @@ static int logical_render_ring_init(struct drm_device *dev)
ret);
}
ret = intel_init_pipe_control(ring);
if (ret)
ret = logical_ring_init(dev, ring);
if (ret) {
lrc_destroy_wa_ctx_obj(ring);
}
return ret;
}