I consistently forget how to decode the HEAD pointer. If we put it in
the error state, one doesn't need to look in docs to find the relevant
info.
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
drivers/gpu/drm/i915/i915_debugfs.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e913d32..dd5a64e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -643,7 +643,10 @@ static void i915_ring_error_state(struct seq_file *m,
{
BUG_ON(ring >= I915_NUM_RINGS); /* shut up confused gcc */
seq_printf(m, "%s command stream:\n", ring_str(ring));
- seq_printf(m, " HEAD: 0x%08x\n", error->head[ring]);
+ seq_printf(m, " HEAD: 0x%08x (wraps: %d; offset: 0x%08x)\n",
+ error->head[ring],
+ error->head[ring] >> 21,
+ error->head[ring] & (0x7ffff << 2));
seq_printf(m, " TAIL: 0x%08x\n", error->tail[ring]);
seq_printf(m, " CTL: 0x%08x\n", error->ctl[ring]);
seq_printf(m, " ACTHD: 0x%08x\n", error->acthd[ring]);
--
1.8.2.1
