1 files changed, 326 insertions, 3 deletions

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 1611b9bcbe7f..65d72d094c81 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -20,6 +20,7 @@
 #include "drmP.h"
 
 #define to_drm_minor(d) container_of(d, struct drm_minor, kdev)
+#define to_drm_connector(d) container_of(d, struct drm_connector, kdev)
 
 /**
  * drm_sysfs_suspend - DRM class suspend hook
@@ -34,7 +35,7 @@ static int drm_sysfs_suspend(struct device *dev, pm_message_t state)
         struct drm_minor *drm_minor = to_drm_minor(dev);
         struct drm_device *drm_dev = drm_minor->dev;
 
-        if (drm_dev->driver->suspend)
+        if (drm_minor->type == DRM_MINOR_LEGACY && drm_dev->driver->suspend)
                 return drm_dev->driver->suspend(drm_dev, state);
 
         return 0;
@@ -52,7 +53,7 @@ static int drm_sysfs_resume(struct device *dev)
         struct drm_minor *drm_minor = to_drm_minor(dev);
         struct drm_device *drm_dev = drm_minor->dev;
 
-        if (drm_dev->driver->resume)
+        if (drm_minor->type == DRM_MINOR_LEGACY && drm_dev->driver->resume)
                 return drm_dev->driver->resume(drm_dev);
 
         return 0;
@@ -144,6 +145,323 @@ static void drm_sysfs_device_release(struct device *dev)
         return;
 }
 
+/*
+ * Connector properties
+ */
+static ssize_t status_show(struct device *device,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        struct drm_connector *connector = to_drm_connector(device);
+        enum drm_connector_status status;
+
+        status = connector->funcs->detect(connector);
+        return snprintf(buf, PAGE_SIZE, "%s",
+                        drm_get_connector_status_name(status));
+}
+
+static ssize_t dpms_show(struct device *device,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        struct drm_connector *connector = to_drm_connector(device);
+        struct drm_device *dev = connector->dev;
+        uint64_t dpms_status;
+        int ret;
+
+        ret = drm_connector_property_get_value(connector,
+                                            dev->mode_config.dpms_property,
+                                            &dpms_status);
+        if (ret)
+                return 0;
+
+        return snprintf(buf, PAGE_SIZE, "%s",
+                        drm_get_dpms_name((int)dpms_status));
+}
+
+static ssize_t enabled_show(struct device *device,
+                            struct device_attribute *attr,
+                           char *buf)
+{
+        struct drm_connector *connector = to_drm_connector(device);
+
+        return snprintf(buf, PAGE_SIZE, connector->encoder ? "enabled" :
+                        "disabled");
+}
+
+static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *attr,
+                         char *buf, loff_t off, size_t count)
+{
+        struct device *connector_dev = container_of(kobj, struct device, kobj);
+        struct drm_connector *connector = to_drm_connector(connector_dev);
+        unsigned char *edid;
+        size_t size;
+
+        if (!connector->edid_blob_ptr)
+                return 0;
+
+        edid = connector->edid_blob_ptr->data;
+        size = connector->edid_blob_ptr->length;
+        if (!edid)
+                return 0;
+
+        if (off >= size)
+                return 0;
+
+        if (off + count > size)
+                count = size - off;
+        memcpy(buf, edid + off, count);
+
+        return count;
+}
+
+static ssize_t modes_show(struct device *device,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        struct drm_connector *connector = to_drm_connector(device);
+        struct drm_display_mode *mode;
+        int written = 0;
+
+        list_for_each_entry(mode, &connector->modes, head) {
+                written += snprintf(buf + written, PAGE_SIZE - written, "%s\n",
+                                    mode->name);
+        }
+
+        return written;
+}
+
+static ssize_t subconnector_show(struct device *device,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        struct drm_connector *connector = to_drm_connector(device);
+        struct drm_device *dev = connector->dev;
+        struct drm_property *prop = NULL;
+        uint64_t subconnector;
+        int is_tv = 0;
+        int ret;
+
+        switch (connector->connector_type) {
+                case DRM_MODE_CONNECTOR_DVII:
+                        prop = dev->mode_config.dvi_i_subconnector_property;
+                        break;
+                case DRM_MODE_CONNECTOR_Composite:
+                case DRM_MODE_CONNECTOR_SVIDEO:
+                case DRM_MODE_CONNECTOR_Component:
+                        prop = dev->mode_config.tv_subconnector_property;
+                        is_tv = 1;
+                        break;
+                default:
+                        DRM_ERROR("Wrong connector type for this property\n");
+                        return 0;
+        }
+
+        if (!prop) {
+                DRM_ERROR("Unable to find subconnector property\n");
+                return 0;
+        }
+
+        ret = drm_connector_property_get_value(connector, prop, &subconnector);
+        if (ret)
+                return 0;
+
+        return snprintf(buf, PAGE_SIZE, "%s", is_tv ?
+                        drm_get_tv_subconnector_name((int)subconnector) :
+                        drm_get_dvi_i_subconnector_name((int)subconnector));
+}
+
+static ssize_t select_subconnector_show(struct device *device,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        struct drm_connector *connector = to_drm_connector(device);
+        struct drm_device *dev = connector->dev;
+        struct drm_property *prop = NULL;
+        uint64_t subconnector;
+        int is_tv = 0;
+        int ret;
+
+        switch (connector->connector_type) {
+                case DRM_MODE_CONNECTOR_DVII:
+                        prop = dev->mode_config.dvi_i_select_subconnector_property;
+                        break;
+                case DRM_MODE_CONNECTOR_Composite:
+                case DRM_MODE_CONNECTOR_SVIDEO:
+                case DRM_MODE_CONNECTOR_Component:
+                        prop = dev->mode_config.tv_select_subconnector_property;
+                        is_tv = 1;
+                        break;
+                default:
+                        DRM_ERROR("Wrong connector type for this property\n");
+                        return 0;
+        }
+
+        if (!prop) {
+                DRM_ERROR("Unable to find select subconnector property\n");
+                return 0;
+        }
+
+        ret = drm_connector_property_get_value(connector, prop, &subconnector);
+        if (ret)
+                return 0;
+
+        return snprintf(buf, PAGE_SIZE, "%s", is_tv ?
+                        drm_get_tv_select_name((int)subconnector) :
+                        drm_get_dvi_i_select_name((int)subconnector));
+}
+
+static struct device_attribute connector_attrs[] = {
+        __ATTR_RO(status),
+        __ATTR_RO(enabled),
+        __ATTR_RO(dpms),
+        __ATTR_RO(modes),
+};
+
+/* These attributes are for both DVI-I connectors and all types of tv-out. */
+static struct device_attribute connector_attrs_opt1[] = {
+        __ATTR_RO(subconnector),
+        __ATTR_RO(select_subconnector),
+};
+
+static struct bin_attribute edid_attr = {
+        .attr.name = "edid",
+        .size = 128,
+        .read = edid_show,
+};
+
+/**
+ * drm_sysfs_connector_add - add an connector to sysfs
+ * @connector: connector to add
+ *
+ * Create an connector device in sysfs, along with its associated connector
+ * properties (so far, connection status, dpms, mode list & edid) and
+ * generate a hotplug event so userspace knows there's a new connector
+ * available.
+ *
+ * Note:
+ * This routine should only be called *once* for each DRM minor registered.
+ * A second call for an already registered device will trigger the BUG_ON
+ * below.
+ */
+int drm_sysfs_connector_add(struct drm_connector *connector)
+{
+        struct drm_device *dev = connector->dev;
+        int ret = 0, i, j;
+
+        /* We shouldn't get called more than once for the same connector */
+        BUG_ON(device_is_registered(&connector->kdev));
+
+        connector->kdev.parent = &dev->primary->kdev;
+        connector->kdev.class = drm_class;
+        connector->kdev.release = drm_sysfs_device_release;
+
+        DRM_DEBUG("adding \"%s\" to sysfs\n",
+                  drm_get_connector_name(connector));
+
+        snprintf(connector->kdev.bus_id, BUS_ID_SIZE, "card%d-%s",
+                 dev->primary->index, drm_get_connector_name(connector));
+        ret = device_register(&connector->kdev);
+
+        if (ret) {
+                DRM_ERROR("failed to register connector device: %d\n", ret);
+                goto out;
+        }
+
+        /* Standard attributes */
+
+        for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) {
+                ret = device_create_file(&connector->kdev, &connector_attrs[i]);
+                if (ret)
+                        goto err_out_files;
+        }
+
+        /* Optional attributes */
+        /*
+         * In the long run it maybe a good idea to make one set of
+         * optionals per connector type.
+         */
+        switch (connector->connector_type) {
+                case DRM_MODE_CONNECTOR_DVII:
+                case DRM_MODE_CONNECTOR_Composite:
+                case DRM_MODE_CONNECTOR_SVIDEO:
+                case DRM_MODE_CONNECTOR_Component:
+                        for (i = 0; i < ARRAY_SIZE(connector_attrs_opt1); i++) {
+                                ret = device_create_file(&connector->kdev, &connector_attrs_opt1[i]);
+                                if (ret)
+                                        goto err_out_files;
+                        }
+                        break;
+                default:
+                        break;
+        }
+
+        ret = sysfs_create_bin_file(&connector->kdev.kobj, &edid_attr);
+        if (ret)
+                goto err_out_files;
+
+        /* Let userspace know we have a new connector */
+        drm_sysfs_hotplug_event(dev);
+
+        return 0;
+
+err_out_files:
+        if (i > 0)
+                for (j = 0; j < i; j++)
+                        device_remove_file(&connector->kdev,
+                                           &connector_attrs[i]);
+        device_unregister(&connector->kdev);
+
+out:
+        return ret;
+}
+EXPORT_SYMBOL(drm_sysfs_connector_add);
+
+/**
+ * drm_sysfs_connector_remove - remove an connector device from sysfs
+ * @connector: connector to remove
+ *
+ * Remove @connector and its associated attributes from sysfs.  Note that
+ * the device model core will take care of sending the "remove" uevent
+ * at this time, so we don't need to do it.
+ *
+ * Note:
+ * This routine should only be called if the connector was previously
+ * successfully registered.  If @connector hasn't been registered yet,
+ * you'll likely see a panic somewhere deep in sysfs code when called.
+ */
+void drm_sysfs_connector_remove(struct drm_connector *connector)
+{
+        int i;
+
+        DRM_DEBUG("removing \"%s\" from sysfs\n",
+                  drm_get_connector_name(connector));
+
+        for (i = 0; i < ARRAY_SIZE(connector_attrs); i++)
+                device_remove_file(&connector->kdev, &connector_attrs[i]);
+        sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr);
+        device_unregister(&connector->kdev);
+}
+EXPORT_SYMBOL(drm_sysfs_connector_remove);
+
+/**
+ * drm_sysfs_hotplug_event - generate a DRM uevent
+ * @dev: DRM device
+ *
+ * Send a uevent for the DRM device specified by @dev.  Currently we only
+ * set HOTPLUG=1 in the uevent environment, but this could be expanded to
+ * deal with other types of events.
+ */
+void drm_sysfs_hotplug_event(struct drm_device *dev)
+{
+        char *event_string = "HOTPLUG=1";
+        char *envp[] = { event_string, NULL };
+
+        DRM_DEBUG("generating hotplug event\n");
+
+        kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp);
+}
+
 /**
  * drm_sysfs_device_add - adds a class device to sysfs for a character driver
  * @dev: DRM device to be added
@@ -163,7 +481,12 @@ int drm_sysfs_device_add(struct drm_minor *minor)
         minor->kdev.class = drm_class;
         minor->kdev.release = drm_sysfs_device_release;
         minor->kdev.devt = minor->device;
-        minor_str = "card%d";
+        if (minor->type == DRM_MINOR_CONTROL)
+                minor_str = "controlD%d";
+        else if (minor->type == DRM_MINOR_RENDER)
+                minor_str = "renderD%d";
+        else
+                minor_str = "card%d";
 
         snprintf(minor->kdev.bus_id, BUS_ID_SIZE, minor_str, minor->index);