drm/i915: Add fifo underrun reporting state to debugfs

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.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 333dd12d62f43c193a2d589b27c6a749bdc93e6d..2e5f76a585ef0b8612e5a24af168b102c8e7969a 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2357,6 +2357,10 @@ 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");