drm/i915: Use connector_type for printing in intel_connector_info, v2.

Instead of looking at encoder->type, which may be set to UNKNOWN,
use connector->connector_type. Info cannot be printed for MST
connectors which may have a NULL encoder, return early in that case.

Changes since v1:
- Whitelist encoder types for HDMI and LVDS.
- Fix oops on MST.
- Do not list encoder types for eDP/DP, they're always valid.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/7cf34026-392d-01ec-e79b-e91919d1d783@linux.intel.com

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 8fde959..9989b6a 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2989,14 +2989,26 @@ static void intel_connector_info(struct seq_file *m,
                seq_printf(m, "\tCEA rev: %d\n",
                           connector->display_info.cea_rev);
        }
-       if (intel_encoder) {
-               if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
-                   intel_encoder->type == INTEL_OUTPUT_EDP)
-                       intel_dp_info(m, intel_connector);
-               else if (intel_encoder->type == INTEL_OUTPUT_HDMI)
-                       intel_hdmi_info(m, intel_connector);
-               else if (intel_encoder->type == INTEL_OUTPUT_LVDS)
+
+       if (!intel_encoder || intel_encoder->type == INTEL_OUTPUT_DP_MST)
+               return;
+
+       switch (connector->connector_type) {
+       case DRM_MODE_CONNECTOR_DisplayPort:
+       case DRM_MODE_CONNECTOR_eDP:
+               intel_dp_info(m, intel_connector);
+               break;
+       case DRM_MODE_CONNECTOR_LVDS:
+               if (intel_encoder->type == INTEL_OUTPUT_LVDS)
                        intel_lvds_info(m, intel_connector);
+               break;
+       case DRM_MODE_CONNECTOR_HDMIA:
+               if (intel_encoder->type == INTEL_OUTPUT_HDMI ||
+                   intel_encoder->type == INTEL_OUTPUT_UNKNOWN)
+                       intel_hdmi_info(m, intel_connector);
+               break;
+       default:
+               break;
        }
 
        seq_printf(m, "\tmodes:\n");