drm/modes: add connector reference counting. (v2)
This uses the previous changes to add reference counts to drm connector objects. v2: move fbdev changes to their own patch. add some kerneldoc Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Daniel Stone <daniels@collabora.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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e76d399f21
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b164d31f50
3 changed files with 72 additions and 7 deletions
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@ -156,6 +156,7 @@ void drm_atomic_state_default_clear(struct drm_atomic_state *state)
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state->connector_states[i]);
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state->connectors[i] = NULL;
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state->connector_states[i] = NULL;
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drm_connector_unreference(connector);
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}
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for (i = 0; i < config->num_crtc; i++) {
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@ -932,6 +933,7 @@ drm_atomic_get_connector_state(struct drm_atomic_state *state,
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if (!connector_state)
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return ERR_PTR(-ENOMEM);
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drm_connector_reference(connector);
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state->connector_states[index] = connector_state;
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state->connectors[index] = connector;
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connector_state->state = state;
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@ -1622,12 +1624,19 @@ retry:
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}
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obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY);
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if (!obj || !obj->properties) {
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if (!obj) {
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ret = -ENOENT;
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goto out;
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}
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if (!obj->properties) {
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drm_mode_object_unreference(obj);
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ret = -ENOENT;
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goto out;
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}
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if (get_user(count_props, count_props_ptr + copied_objs)) {
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drm_mode_object_unreference(obj);
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ret = -EFAULT;
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goto out;
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}
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@ -1640,12 +1649,14 @@ retry:
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struct drm_property *prop;
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if (get_user(prop_id, props_ptr + copied_props)) {
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drm_mode_object_unreference(obj);
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ret = -EFAULT;
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goto out;
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}
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prop = drm_property_find(dev, prop_id);
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if (!prop) {
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drm_mode_object_unreference(obj);
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ret = -ENOENT;
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goto out;
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}
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@ -1653,13 +1664,16 @@ retry:
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if (copy_from_user(&prop_value,
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prop_values_ptr + copied_props,
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sizeof(prop_value))) {
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drm_mode_object_unreference(obj);
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ret = -EFAULT;
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goto out;
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}
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ret = atomic_set_prop(state, obj, prop, prop_value);
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if (ret)
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if (ret) {
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drm_mode_object_unreference(obj);
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goto out;
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}
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copied_props++;
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}
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@ -1670,6 +1684,7 @@ retry:
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plane_mask |= (1 << drm_plane_index(plane));
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plane->old_fb = plane->fb;
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}
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drm_mode_object_unreference(obj);
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}
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if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
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@ -864,6 +864,16 @@ static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
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mode->interlace ? " interlaced" : "");
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}
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static void drm_connector_free(struct kref *kref)
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{
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struct drm_connector *connector =
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container_of(kref, struct drm_connector, base.refcount);
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struct drm_device *dev = connector->dev;
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drm_mode_object_unregister(dev, &connector->base);
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connector->funcs->destroy(connector);
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}
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/**
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* drm_connector_init - Init a preallocated connector
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* @dev: DRM device
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@ -889,7 +899,9 @@ int drm_connector_init(struct drm_device *dev,
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drm_modeset_lock_all(dev);
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ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, NULL);
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ret = drm_mode_object_get_reg(dev, &connector->base,
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DRM_MODE_OBJECT_CONNECTOR,
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false, drm_connector_free);
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if (ret)
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goto out_unlock;
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@ -2137,7 +2149,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
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mutex_lock(&dev->mode_config.mutex);
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connector = drm_connector_find(dev, out_resp->connector_id);
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connector = drm_connector_lookup(dev, out_resp->connector_id);
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if (!connector) {
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ret = -ENOENT;
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goto out_unlock;
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@ -2221,6 +2233,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
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out:
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drm_modeset_unlock(&dev->mode_config.connection_mutex);
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drm_connector_unreference(connector);
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out_unlock:
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mutex_unlock(&dev->mode_config.mutex);
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@ -2865,13 +2878,14 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
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}
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for (i = 0; i < crtc_req->count_connectors; i++) {
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connector_set[i] = NULL;
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set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
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if (get_user(out_id, &set_connectors_ptr[i])) {
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ret = -EFAULT;
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goto out;
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}
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connector = drm_connector_find(dev, out_id);
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connector = drm_connector_lookup(dev, out_id);
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if (!connector) {
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DRM_DEBUG_KMS("Connector id %d unknown\n",
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out_id);
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@ -2899,6 +2913,12 @@ out:
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if (fb)
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drm_framebuffer_unreference(fb);
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if (connector_set) {
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for (i = 0; i < crtc_req->count_connectors; i++) {
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if (connector_set[i])
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drm_connector_unreference(connector_set[i]);
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}
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}
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kfree(connector_set);
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drm_mode_destroy(dev, mode);
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drm_modeset_unlock_all(dev);
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@ -4989,7 +5009,7 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
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property = obj_to_property(prop_obj);
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if (!drm_property_change_valid_get(property, arg->value, &ref))
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goto out;
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goto out_unref;
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switch (arg_obj->type) {
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case DRM_MODE_OBJECT_CONNECTOR:
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@ -2571,7 +2571,15 @@ static inline struct drm_encoder *drm_encoder_find(struct drm_device *dev,
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return mo ? obj_to_encoder(mo) : NULL;
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}
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static inline struct drm_connector *drm_connector_find(struct drm_device *dev,
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/**
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* drm_connector_lookup - lookup connector object
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* @dev: DRM device
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* @id: connector object id
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*
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* This function looks up the connector object specified by id
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* add takes a reference to it.
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*/
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static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
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uint32_t id)
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{
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struct drm_mode_object *mo;
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@ -2639,6 +2647,28 @@ static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
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return atomic_read(&fb->base.refcount.refcount);
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}
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/**
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* drm_connector_reference - incr the connector refcnt
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* @connector: connector
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*
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* This function increments the connector's refcount.
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*/
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static inline void drm_connector_reference(struct drm_connector *connector)
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{
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drm_mode_object_reference(&connector->base);
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}
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/**
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* drm_connector_unreference - unref a connector
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* @connector: connector to unref
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*
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* This function decrements the connector's refcount and frees it if it drops to zero.
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*/
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static inline void drm_connector_unreference(struct drm_connector *connector)
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{
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drm_mode_object_unreference(&connector->base);
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}
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/* Plane list iterator for legacy (overlay only) planes. */
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#define drm_for_each_legacy_plane(plane, dev) \
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list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \
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