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-rw-r--r--linux-core/drm_sysfs.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/linux-core/drm_sysfs.c b/linux-core/drm_sysfs.c
index 92371c22..02b08534 100644
--- a/linux-core/drm_sysfs.c
+++ b/linux-core/drm_sysfs.c
@@ -176,6 +176,19 @@ static ssize_t dpms_show(struct device *device,
return snprintf(buf, PAGE_SIZE, "%s", drm_get_dpms_name((int)dpms_status));
}
+static ssize_t connected_show(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct drm_connector *connector = container_of(device, struct drm_connector, kdev);
+ struct drm_device *dev = connector->dev;
+
+ if (connector->encoder)
+ return snprintf(buf, PAGE_SIZE, "connected");
+ else
+ return snprintf(buf, PAGE_SIZE, "disconnected");
+}
+
static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
@@ -221,6 +234,7 @@ static ssize_t modes_show(struct device *device,
static struct device_attribute connector_attrs[] = {
__ATTR_RO(status),
+ __ATTR_RO(connected),
__ATTR_RO(dpms),
__ATTR_RO(modes),
};