if (!state)
return NULL;
+ /* TODO legacy paths should maybe do a better job about
+ * setting this appropriately?
+ */
+ state->allow_modeset = true;
+
state->num_connector = ACCESS_ONCE(dev->mode_config.num_connector);
state->crtcs = kcalloc(dev->mode_config.num_crtc,
if (config->funcs->atomic_check)
ret = config->funcs->atomic_check(state->dev, state);
+ if (!state->allow_modeset) {
+ for (i = 0; i < ncrtcs; i++) {
+ struct drm_crtc *crtc = state->crtcs[i];
+ struct drm_crtc_state *crtc_state = state->crtc_states[i];
+
+ if (!crtc)
+ continue;
+
+ if (crtc_state->mode_changed) {
+ DRM_DEBUG_KMS("[CRTC:%d] requires full modeset\n",
+ crtc->base.id);
+ return -EINVAL;
+ }
+ }
+ }
+
return ret;
}
EXPORT_SYMBOL(drm_atomic_check_only);
return config->funcs->atomic_commit(state->dev, state, true);
}
EXPORT_SYMBOL(drm_atomic_async_commit);
+
+/*
+ * The big monstor ioctl
+ */
+
+static struct drm_pending_vblank_event *create_vblank_event(
+ struct drm_device *dev, struct drm_file *file_priv, uint64_t user_data)
+{
+ struct drm_pending_vblank_event *e = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ if (file_priv->event_space < sizeof e->event) {
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ goto out;
+ }
+ file_priv->event_space -= sizeof e->event;
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+
+ e = kzalloc(sizeof *e, GFP_KERNEL);
+ if (e == NULL) {
+ spin_lock_irqsave(&dev->event_lock, flags);
+ file_priv->event_space += sizeof e->event;
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ goto out;
+ }
+
+ e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
+ e->event.base.length = sizeof e->event;
+ e->event.user_data = user_data;
+ e->base.event = &e->event.base;
+ e->base.file_priv = file_priv;
+ e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
+
+out:
+ return e;
+}
+
+static void destroy_vblank_event(struct drm_device *dev,
+ struct drm_file *file_priv, struct drm_pending_vblank_event *e)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ file_priv->event_space += sizeof e->event;
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ kfree(e);
+}
+
+static int atomic_set_prop(struct drm_atomic_state *state,
+ struct drm_mode_object *obj, struct drm_property *prop,
+ uint64_t prop_value)
+{
+ struct drm_mode_object *ref;
+ int ret;
+
+ if (!drm_property_change_valid_get(prop, prop_value, &ref))
+ return -EINVAL;
+
+ switch (obj->type) {
+ case DRM_MODE_OBJECT_CONNECTOR: {
+ struct drm_connector *connector = obj_to_connector(obj);
+ struct drm_connector_state *connector_state;
+
+ connector_state = drm_atomic_get_connector_state(state, connector);
+ if (IS_ERR(connector_state)) {
+ ret = PTR_ERR(connector_state);
+ break;
+ }
+
+ ret = drm_atomic_connector_set_property(connector,
+ connector_state, prop, prop_value);
+ break;
+ }
+ case DRM_MODE_OBJECT_CRTC: {
+ struct drm_crtc *crtc = obj_to_crtc(obj);
+ struct drm_crtc_state *crtc_state;
+
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(crtc_state)) {
+ ret = PTR_ERR(crtc_state);
+ break;
+ }
+
+ ret = drm_atomic_crtc_set_property(crtc,
+ crtc_state, prop, prop_value);
+ break;
+ }
+ case DRM_MODE_OBJECT_PLANE: {
+ struct drm_plane *plane = obj_to_plane(obj);
+ struct drm_plane_state *plane_state;
+
+ plane_state = drm_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state)) {
+ ret = PTR_ERR(plane_state);
+ break;
+ }
+
+ ret = drm_atomic_plane_set_property(plane,
+ plane_state, prop, prop_value);
+ break;
+ }
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ drm_property_change_valid_put(prop, ref);
+ return ret;
+}
+
+int drm_mode_atomic_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_atomic *arg = data;
+ uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
+ uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
+ uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
+ uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
+ unsigned int copied_objs, copied_props;
+ struct drm_atomic_state *state;
+ struct drm_modeset_acquire_ctx ctx;
+ struct drm_plane *plane;
+ unsigned plane_mask = 0;
+ int ret = 0;
+ unsigned int i, j;
+
+ /* disallow for drivers not supporting atomic: */
+ if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
+ return -EINVAL;
+
+ /* disallow for userspace that has not enabled atomic cap (even
+ * though this may be a bit overkill, since legacy userspace
+ * wouldn't know how to call this ioctl)
+ */
+ if (!file_priv->atomic)
+ return -EINVAL;
+
+ if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
+ return -EINVAL;
+
+ if (arg->reserved)
+ return -EINVAL;
+
+ if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
+ !dev->mode_config.async_page_flip)
+ return -EINVAL;
+
+ /* can't test and expect an event at the same time. */
+ if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
+ (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
+ return -EINVAL;
+
+ drm_modeset_acquire_init(&ctx, 0);
+
+ state = drm_atomic_state_alloc(dev);
+ if (!state)
+ return -ENOMEM;
+
+ state->acquire_ctx = &ctx;
+ state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
+
+retry:
+ copied_objs = 0;
+ copied_props = 0;
+
+ for (i = 0; i < arg->count_objs; i++) {
+ uint32_t obj_id, count_props;
+ struct drm_mode_object *obj;
+
+ if (get_user(obj_id, objs_ptr + copied_objs)) {
+ ret = -EFAULT;
+ goto fail;
+ }
+
+ obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY);
+ if (!obj || !obj->properties) {
+ ret = -ENOENT;
+ goto fail;
+ }
+
+ if (obj->type == DRM_MODE_OBJECT_PLANE) {
+ plane = obj_to_plane(obj);
+ plane_mask |= (1 << drm_plane_index(plane));
+ plane->old_fb = plane->fb;
+ }
+
+ if (get_user(count_props, count_props_ptr + copied_objs)) {
+ ret = -EFAULT;
+ goto fail;
+ }
+
+ copied_objs++;
+
+ for (j = 0; j < count_props; j++) {
+ uint32_t prop_id;
+ uint64_t prop_value;
+ struct drm_property *prop;
+
+ if (get_user(prop_id, props_ptr + copied_props)) {
+ ret = -EFAULT;
+ goto fail;
+ }
+
+ prop = drm_property_find(dev, prop_id);
+ if (!prop) {
+ ret = -ENOENT;
+ goto fail;
+ }
+
+ if (get_user(prop_value, prop_values_ptr + copied_props)) {
+ ret = -EFAULT;
+ goto fail;
+ }
+
+ ret = atomic_set_prop(state, obj, prop, prop_value);
+ if (ret)
+ goto fail;
+
+ copied_props++;
+ }
+ }
+
+ if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
+ int ncrtcs = dev->mode_config.num_crtc;
+
+ for (i = 0; i < ncrtcs; i++) {
+ struct drm_crtc_state *crtc_state = state->crtc_states[i];
+ struct drm_pending_vblank_event *e;
+
+ if (!crtc_state)
+ continue;
+
+ e = create_vblank_event(dev, file_priv, arg->user_data);
+ if (!e) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ crtc_state->event = e;
+ }
+ }
+
+ if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
+ ret = drm_atomic_check_only(state);
+ /* _check_only() does not free state, unlike _commit() */
+ drm_atomic_state_free(state);
+ } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
+ ret = drm_atomic_async_commit(state);
+ } else {
+ ret = drm_atomic_commit(state);
+ }
+
+ /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
+ * locks (ie. while it is still safe to deref plane->state). We
+ * need to do this here because the driver entry points cannot
+ * distinguish between legacy and atomic ioctls.
+ */
+ drm_for_each_plane_mask(plane, dev, plane_mask) {
+ if (ret == 0) {
+ struct drm_framebuffer *new_fb = plane->state->fb;
+ if (new_fb)
+ drm_framebuffer_reference(new_fb);
+ plane->fb = new_fb;
+ plane->crtc = plane->state->crtc;
+ } else {
+ plane->old_fb = NULL;
+ }
+ if (plane->old_fb) {
+ drm_framebuffer_unreference(plane->old_fb);
+ plane->old_fb = NULL;
+ }
+ }
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
+
+ return ret;
+
+fail:
+ if (ret == -EDEADLK)
+ goto backoff;
+
+ if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
+ int ncrtcs = dev->mode_config.num_crtc;
+
+ for (i = 0; i < ncrtcs; i++) {
+ struct drm_crtc_state *crtc_state = state->crtc_states[i];
+
+ if (!crtc_state)
+ continue;
+
+ destroy_vblank_event(dev, file_priv, crtc_state->event);
+ crtc_state->event = NULL;
+ }
+ }
+
+ drm_atomic_state_free(state);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
+
+ return ret;
+
+backoff:
+ drm_atomic_state_clear(state);
+ drm_modeset_backoff(&ctx);
+
+ goto retry;
+}
projects / openwrt / staging / blogic.git / commitdiff