When a link-training attempt fails, emit a uevent to user space that includes the trigger property, which in this case will be link-statue=Bad. This will allow userspace to parse the uevent property and better understand the reason for the previous modeset failure. Change-Id: I6170e2755121adf04621ae4fff06985bf4b26d3a Signed-off-by: Gil Dekel <gildekel@xxxxxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_dp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 71f54e56c4434..f45c3bab743cc 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -42,6 +42,7 @@ #include <drm/drm_crtc.h> #include <drm/drm_edid.h> #include <drm/drm_probe_helper.h> +#include <drm/drm_sysfs.h> #include "g4x_dp.h" #include "i915_debugfs.h" @@ -5326,6 +5327,8 @@ static void intel_dp_modeset_retry_work_fn(struct work_struct *work) struct intel_dp *intel_dp = container_of(work, typeof(*intel_dp), modeset_retry_work); struct drm_connector *connector = &intel_dp->attached_connector->base; + struct drm_property *link_status_property = + connector->dev->mode_config.link_status_property; /* Set the connector's (and possibly all its downstream MST ports') link * status to BAD. @@ -5342,7 +5345,7 @@ static void intel_dp_modeset_retry_work_fn(struct work_struct *work) } mutex_unlock(&connector->dev->mode_config.mutex); /* Send Hotplug uevent so userspace can reprobe */ - drm_kms_helper_connector_hotplug_event(connector); + drm_sysfs_connector_status_event(connector, link_status_property); } bool -- Gil Dekel, Software Engineer, Google / ChromeOS Display and Graphics
