[PATCH] drm: Make the HPD status updates debug logs more readable

[Damien Lespiau]

From: Damien Lespiau <damien.lesp...@intel.com>

Instead of just printing "status updated from 1 to 2", make those enum
numbers immediately readable.

Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
 drivers/gpu/drm/drm_crtc_helper.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc_helper.c 
b/drivers/gpu/drm/drm_crtc_helper.c
index 1fe719f..8b963fd 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -1043,6 +1043,18 @@ void drm_kms_helper_poll_fini(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_kms_helper_poll_fini);

+static const char *connector_status_str(enum drm_connector_status status)
+{
+       switch (status) {
+       case connector_status_connected:
+               return "connected";
+       case connector_status_disconnected:
+               return "disconnected";
+       default:
+               return "unknown";
+       }
+}
+
 void drm_helper_hpd_irq_event(struct drm_device *dev)
 {
        struct drm_connector *connector;
@@ -1062,10 +1074,11 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
                old_status = connector->status;

                connector->status = connector->funcs->detect(connector, false);
-               DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to 
%d\n",
+               DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to 
%s\n",
                              connector->base.id,
                              drm_get_connector_name(connector),
-                             old_status, connector->status);
+                             connector_status_str(old_status),
+                             connector_status_str(connector->status));
                if (old_status != connector->status)
                        changed = true;
        }
-- 
1.7.11.7