drm/i915: Record ring->start address in error state
This is mostly useful for execlists where the rings switch between
contexts (and so checking that the ring's start register matches the
context is important).
Signed-off-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_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6e0a0ae..f4daa3d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -455,6 +455,7 @@
u32 semaphore_seqno[I915_NUM_RINGS - 1];
/* Register state */
+ u32 start;
u32 tail;
u32 head;
u32 ctl;