[Intel-gfx] [PATCH 1/5] drm/i915: Add fifo underrun reporting state to debugfs

[Daniel Vetter]

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 <daniel.vetter at ffwll.ch>
---
 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