On platforms with shared interrupt enable bits (which are shared even
with the pipe CRC logic) there's some tricky corner cases. Add
information to make debugging those easier.

Signed-off-by: Daniel Vetter <[email protected]>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c 
b/drivers/gpu/drm/i915/i915_debugfs.c
index 16bbdc7243df..4a79d3fe35be 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2356,6 +2356,10 @@ static int i915_display_info(struct seq_file *m, void 
*unused)
                                   x, y, crtc->cursor_addr,
                                   yesno(active));
                }
+
+               seq_printf(m, "\tunderrun reporting: cpu=%s pch=%s \n",
+                          yesno(!crtc->cpu_fifo_underrun_disabled),
+                          yesno(!crtc->pch_fifo_underrun_disabled));
        }
 
        seq_printf(m, "\n");
-- 
1.8.4.rc3

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