drm/i915: Add some debug breadcrumbs to connector detection

Try to decypher detection failures is a little tricker at the moment as
the only indicator of progress is when output_poll_execute() tells us
the result after the connector->detect() has run. This patch adds a
telltale to the start of each detect function so that we can track
progress and associate activity more clearly with each connector.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 3acec8c..0c0d4e8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -613,6 +613,10 @@ intel_crt_detect(struct drm_connector *connector, bool force)
        enum drm_connector_status status;
        struct intel_load_detect_pipe tmp;
 
+       DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n",
+                     connector->base.id, drm_get_connector_name(connector),
+                     force);
+
        if (I915_HAS_HOTPLUG(dev)) {
                /* We can not rely on the HPD pin always being correctly wired
                 * up, for example many KVM do not pass it through, and so

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index d391ce3..1761877 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2815,6 +2815,9 @@ intel_dp_detect(struct drm_connector *connector, bool force)
        enum drm_connector_status status;
        struct edid *edid = NULL;
 
+       DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+                     connector->base.id, drm_get_connector_name(connector));
+
        intel_dp->has_audio = false;
 
        if (HAS_PCH_SPLIT(dev))

diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index cbbc49d..8b4ad27 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -332,6 +332,8 @@ static enum drm_connector_status
 intel_dvo_detect(struct drm_connector *connector, bool force)
 {
        struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
+       DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+                     connector->base.id, drm_get_connector_name(connector));
        return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
 }
 

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 98df2a0..af18da7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -866,6 +866,9 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
        struct edid *edid;
        enum drm_connector_status status = connector_status_disconnected;
 
+       DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+                     connector->base.id, drm_get_connector_name(connector));
+
        intel_hdmi->has_hdmi_sink = false;
        intel_hdmi->has_audio = false;
        intel_hdmi->rgb_quant_range_selectable = false;

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index b0e1088..25ea406 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -339,6 +339,9 @@ intel_lvds_detect(struct drm_connector *connector, bool force)
        struct drm_device *dev = connector->dev;
        enum drm_connector_status status;
 
+       DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+                     connector->base.id, drm_get_connector_name(connector));
+
        status = intel_panel_detect(dev);
        if (status != connector_status_unknown)
                return status;

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 798df11..c3b59b8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1696,6 +1696,9 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
        struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
        enum drm_connector_status ret;
 
+       DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+                     connector->base.id, drm_get_connector_name(connector));
+
        if (!intel_sdvo_get_value(intel_sdvo,
                                  SDVO_CMD_GET_ATTACHED_DISPLAYS,
                                  &response, 2))

diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 39debd8..b0b446f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1305,6 +1305,10 @@ intel_tv_detect(struct drm_connector *connector, bool force)
        struct intel_tv *intel_tv = intel_attached_tv(connector);
        int type;
 
+       DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n",
+                     connector->base.id, drm_get_connector_name(connector),
+                     force);
+
        mode = reported_modes[0];
 
        if (force) {