drm/i915: Add debug messages for pipe enable/disable

Currently we don't have any real indication when a pipe gets
enabled/disabled. Add some.

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

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4882e43..01eaab8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2110,6 +2110,8 @@ static void intel_enable_pipe(struct intel_crtc *crtc)
        int reg;
        u32 val;
 
+       DRM_DEBUG_KMS("enabling pipe %c\n", pipe_name(pipe));
+
        assert_planes_disabled(dev_priv, pipe);
        assert_cursor_disabled(dev_priv, pipe);
        assert_sprites_disabled(dev_priv, pipe);
@@ -2169,6 +2171,8 @@ static void intel_disable_pipe(struct intel_crtc *crtc)
        int reg;
        u32 val;
 
+       DRM_DEBUG_KMS("disabling pipe %c\n", pipe_name(pipe));
+
        /*
         * Make sure planes won't keep trying to pump pixels to us,
         * or we might hang the display.