[Intel-gfx] [PATCH 4/9] drm/i915: Use do_switch for ILK renderctx

[Chris Wilson]

From: Ben Widawsky <ben at bwidawsk.net>

This patch starts the migration to the core context code for Ironlake
renderctx. It is an excellent place for a bisection point due to
complaining hardware, though notice that our sample size is quite
limited given that only machines with RC6 turned on could notice
problems.

NOTE: As mentioned in a previous commit, this removes an MI_FLUSH. If
issues occur, try adding that to the end of mi_set_context before
complaining.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
Tested-by: Chris Wilson <chris at chris-wilson.co.uk> # X still works!
---
 drivers/gpu/drm/i915/i915_gem_context.c |   21 +--------------------
 1 file changed, 1 insertion(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 3a677ac..fbbe3ea 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -581,24 +581,5 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
 
 int ironlake_setup_rc6_hw_context(struct drm_i915_private *dev_priv)
 {
-	struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
-	int ret;
-
-	ret = intel_ring_begin(ring, 6);
-	if (ret)
-		return ret;
-
-	intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
-	intel_ring_emit(ring, MI_SET_CONTEXT);
-	intel_ring_emit(ring, i915_gem_obj_ggtt_offset(dev_priv->ips.renderctx.obj) |
-			MI_MM_SPACE_GTT |
-			MI_SAVE_EXT_STATE_EN |
-			MI_RESTORE_EXT_STATE_EN |
-			MI_RESTORE_INHIBIT);
-	intel_ring_emit(ring, MI_SUSPEND_FLUSH);
-	intel_ring_emit(ring, MI_NOOP);
-	intel_ring_emit(ring, MI_FLUSH);
-	intel_ring_advance(ring);
-
-	return 0;
+	return do_switch(&dev_priv->ips.renderctx);
 }
-- 
1.7.9.5