drm/i915: Include a little more information about why ring init fails
If we include the expected values for the failing ring register checks,
it makes it marginally easier to see which is the culprit.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 7d99e84..8a2bd5a 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -523,12 +523,11 @@
I915_READ_START(ring) == i915_gem_obj_ggtt_offset(obj) &&
(I915_READ_HEAD(ring) & HEAD_ADDR) == 0, 50)) {
DRM_ERROR("%s initialization failed "
- "ctl %08x head %08x tail %08x start %08x\n",
- ring->name,
- I915_READ_CTL(ring),
- I915_READ_HEAD(ring),
- I915_READ_TAIL(ring),
- I915_READ_START(ring));
+ "ctl %08x (valid? %d) head %08x tail %08x start %08x [expected %08lx]\n",
+ ring->name,
+ I915_READ_CTL(ring), I915_READ_CTL(ring) & RING_VALID,
+ I915_READ_HEAD(ring), I915_READ_TAIL(ring),
+ I915_READ_START(ring), (unsigned long)i915_gem_obj_ggtt_offset(obj));
ret = -EIO;
goto out;
}