[Intel-gfx] [PATCH 1/2] drm/i915/dp_mst: log when pulling CRTCs into atomic state

[Simon Ser <contact@emersion.fr>]

It can be surprising for user-space to see unrelated connectors,
CRTCs and planes being implicitly pulled into the atomic commit.
Log when that happens.

Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Lyude Paul <lyude@redhat.com>
---
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 4077a979a924..f773e117ebc4 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -293,6 +293,10 @@ intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector,
 		if (!conn_iter_state->base.crtc)
 			continue;
 
+		drm_dbg_kms(&dev_priv->drm,
+			    "Adding [CONNECTOR:%d:%s] which shares the same DP-MST stream\n",
+			    connector_iter->base.base.id, connector_iter->base.name);
+
 		crtc = to_intel_crtc(conn_iter_state->base.crtc);
 		crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
 		if (IS_ERR(crtc_state)) {
-- 
2.39.0