diff options
Diffstat (limited to 'drivers/gpu/drm/drm_atomic.c')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 751 |
1 files changed, 738 insertions, 13 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index ff5f034cc405..c2e9c5283136 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -56,6 +56,11 @@ drm_atomic_state_alloc(struct drm_device *dev) 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, @@ -129,6 +134,7 @@ void drm_atomic_state_clear(struct drm_atomic_state *state) connector->funcs->atomic_destroy_state(connector, state->connector_states[i]); + state->connector_states[i] = NULL; } for (i = 0; i < config->num_crtc; i++) { @@ -139,6 +145,7 @@ void drm_atomic_state_clear(struct drm_atomic_state *state) crtc->funcs->atomic_destroy_state(crtc, state->crtc_states[i]); + state->crtc_states[i] = NULL; } for (i = 0; i < config->num_total_plane; i++) { @@ -149,6 +156,7 @@ void drm_atomic_state_clear(struct drm_atomic_state *state) plane->funcs->atomic_destroy_state(plane, state->plane_states[i]); + state->plane_states[i] = NULL; } } EXPORT_SYMBOL(drm_atomic_state_clear); @@ -217,6 +225,83 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state, EXPORT_SYMBOL(drm_atomic_get_crtc_state); /** + * drm_atomic_crtc_set_property - set property on CRTC + * @crtc: the drm CRTC to set a property on + * @state: the state object to update with the new property value + * @property: the property to set + * @val: the new property value + * + * Use this instead of calling crtc->atomic_set_property directly. + * This function handles generic/core properties and calls out to + * driver's ->atomic_set_property() for driver properties. To ensure + * consistent behavior you must call this function rather than the + * driver hook directly. + * + * RETURNS: + * Zero on success, error code on failure + */ +int drm_atomic_crtc_set_property(struct drm_crtc *crtc, + struct drm_crtc_state *state, struct drm_property *property, + uint64_t val) +{ + struct drm_device *dev = crtc->dev; + struct drm_mode_config *config = &dev->mode_config; + + /* FIXME: Mode prop is missing, which also controls ->enable. */ + if (property == config->prop_active) { + state->active = val; + } else if (crtc->funcs->atomic_set_property) + return crtc->funcs->atomic_set_property(crtc, state, property, val); + return -EINVAL; +} +EXPORT_SYMBOL(drm_atomic_crtc_set_property); + +/* + * This function handles generic/core properties and calls out to + * driver's ->atomic_get_property() for driver properties. To ensure + * consistent behavior you must call this function rather than the + * driver hook directly. + */ +int drm_atomic_crtc_get_property(struct drm_crtc *crtc, + const struct drm_crtc_state *state, + struct drm_property *property, uint64_t *val) +{ + if (crtc->funcs->atomic_get_property) + return crtc->funcs->atomic_get_property(crtc, state, property, val); + return -EINVAL; +} + +/** + * drm_atomic_crtc_check - check crtc state + * @crtc: crtc to check + * @state: crtc state to check + * + * Provides core sanity checks for crtc state. + * + * RETURNS: + * Zero on success, error code on failure + */ +static int drm_atomic_crtc_check(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + /* NOTE: we explicitly don't enforce constraints such as primary + * layer covering entire screen, since that is something we want + * to allow (on hw that supports it). For hw that does not, it + * should be checked in driver's crtc->atomic_check() vfunc. + * + * TODO: Add generic modeset state checks once we support those. + */ + + if (state->active && !state->enable) { + DRM_DEBUG_KMS("[CRTC:%d] active without enabled\n", + crtc->base.id); + return -EINVAL; + } + + return 0; +} + +/** * drm_atomic_get_plane_state - get plane state * @state: global atomic state object * @plane: plane to get state object for @@ -272,6 +357,185 @@ drm_atomic_get_plane_state(struct drm_atomic_state *state, EXPORT_SYMBOL(drm_atomic_get_plane_state); /** + * drm_atomic_plane_set_property - set property on plane + * @plane: the drm plane to set a property on + * @state: the state object to update with the new property value + * @property: the property to set + * @val: the new property value + * + * Use this instead of calling plane->atomic_set_property directly. + * This function handles generic/core properties and calls out to + * driver's ->atomic_set_property() for driver properties. To ensure + * consistent behavior you must call this function rather than the + * driver hook directly. + * + * RETURNS: + * Zero on success, error code on failure + */ +int drm_atomic_plane_set_property(struct drm_plane *plane, + struct drm_plane_state *state, struct drm_property *property, + uint64_t val) +{ + struct drm_device *dev = plane->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (property == config->prop_fb_id) { + struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val); + drm_atomic_set_fb_for_plane(state, fb); + if (fb) + drm_framebuffer_unreference(fb); + } else if (property == config->prop_crtc_id) { + struct drm_crtc *crtc = drm_crtc_find(dev, val); + return drm_atomic_set_crtc_for_plane(state, crtc); + } else if (property == config->prop_crtc_x) { + state->crtc_x = U642I64(val); + } else if (property == config->prop_crtc_y) { + state->crtc_y = U642I64(val); + } else if (property == config->prop_crtc_w) { + state->crtc_w = val; + } else if (property == config->prop_crtc_h) { + state->crtc_h = val; + } else if (property == config->prop_src_x) { + state->src_x = val; + } else if (property == config->prop_src_y) { + state->src_y = val; + } else if (property == config->prop_src_w) { + state->src_w = val; + } else if (property == config->prop_src_h) { + state->src_h = val; + } else if (property == config->rotation_property) { + state->rotation = val; + } else if (plane->funcs->atomic_set_property) { + return plane->funcs->atomic_set_property(plane, state, + property, val); + } else { + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL(drm_atomic_plane_set_property); + +/* + * This function handles generic/core properties and calls out to + * driver's ->atomic_get_property() for driver properties. To ensure + * consistent behavior you must call this function rather than the + * driver hook directly. + */ +static int +drm_atomic_plane_get_property(struct drm_plane *plane, + const struct drm_plane_state *state, + struct drm_property *property, uint64_t *val) +{ + struct drm_device *dev = plane->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (property == config->prop_fb_id) { + *val = (state->fb) ? state->fb->base.id : 0; + } else if (property == config->prop_crtc_id) { + *val = (state->crtc) ? state->crtc->base.id : 0; + } else if (property == config->prop_crtc_x) { + *val = I642U64(state->crtc_x); + } else if (property == config->prop_crtc_y) { + *val = I642U64(state->crtc_y); + } else if (property == config->prop_crtc_w) { + *val = state->crtc_w; + } else if (property == config->prop_crtc_h) { + *val = state->crtc_h; + } else if (property == config->prop_src_x) { + *val = state->src_x; + } else if (property == config->prop_src_y) { + *val = state->src_y; + } else if (property == config->prop_src_w) { + *val = state->src_w; + } else if (property == config->prop_src_h) { + *val = state->src_h; + } else if (plane->funcs->atomic_get_property) { + return plane->funcs->atomic_get_property(plane, state, property, val); + } else { + return -EINVAL; + } + + return 0; +} + +/** + * drm_atomic_plane_check - check plane state + * @plane: plane to check + * @state: plane state to check + * + * Provides core sanity checks for plane state. + * + * RETURNS: + * Zero on success, error code on failure + */ +static int drm_atomic_plane_check(struct drm_plane *plane, + struct drm_plane_state *state) +{ + unsigned int fb_width, fb_height; + unsigned int i; + + /* either *both* CRTC and FB must be set, or neither */ + if (WARN_ON(state->crtc && !state->fb)) { + DRM_DEBUG_KMS("CRTC set but no FB\n"); + return -EINVAL; + } else if (WARN_ON(state->fb && !state->crtc)) { + DRM_DEBUG_KMS("FB set but no CRTC\n"); + return -EINVAL; + } + + /* if disabled, we don't care about the rest of the state: */ + if (!state->crtc) + return 0; + + /* Check whether this plane is usable on this CRTC */ + if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) { + DRM_DEBUG_KMS("Invalid crtc for plane\n"); + return -EINVAL; + } + + /* Check whether this plane supports the fb pixel format. */ + for (i = 0; i < plane->format_count; i++) + if (state->fb->pixel_format == plane->format_types[i]) + break; + if (i == plane->format_count) { + DRM_DEBUG_KMS("Invalid pixel format %s\n", + drm_get_format_name(state->fb->pixel_format)); + return -EINVAL; + } + + /* Give drivers some help against integer overflows */ + if (state->crtc_w > INT_MAX || + state->crtc_x > INT_MAX - (int32_t) state->crtc_w || + state->crtc_h > INT_MAX || + state->crtc_y > INT_MAX - (int32_t) state->crtc_h) { + DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", + state->crtc_w, state->crtc_h, + state->crtc_x, state->crtc_y); + return -ERANGE; + } + + fb_width = state->fb->width << 16; + fb_height = state->fb->height << 16; + + /* Make sure source coordinates are inside the fb. */ + if (state->src_w > fb_width || + state->src_x > fb_width - state->src_w || + state->src_h > fb_height || + state->src_y > fb_height - state->src_h) { + DRM_DEBUG_KMS("Invalid source coordinates " + "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", + state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10, + state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10, + state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10, + state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10); + return -ENOSPC; + } + + return 0; +} + +/** * drm_atomic_get_connector_state - get connector state * @state: global atomic state object * @connector: connector to get state object for @@ -343,9 +607,113 @@ drm_atomic_get_connector_state(struct drm_atomic_state *state, EXPORT_SYMBOL(drm_atomic_get_connector_state); /** + * drm_atomic_connector_set_property - set property on connector. + * @connector: the drm connector to set a property on + * @state: the state object to update with the new property value + * @property: the property to set + * @val: the new property value + * + * Use this instead of calling connector->atomic_set_property directly. + * This function handles generic/core properties and calls out to + * driver's ->atomic_set_property() for driver properties. To ensure + * consistent behavior you must call this function rather than the + * driver hook directly. + * + * RETURNS: + * Zero on success, error code on failure + */ +int drm_atomic_connector_set_property(struct drm_connector *connector, + struct drm_connector_state *state, struct drm_property *property, + uint64_t val) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (property == config->prop_crtc_id) { + struct drm_crtc *crtc = drm_crtc_find(dev, val); + return drm_atomic_set_crtc_for_connector(state, crtc); + } else if (property == config->dpms_property) { + /* setting DPMS property requires special handling, which + * is done in legacy setprop path for us. Disallow (for + * now?) atomic writes to DPMS property: + */ + return -EINVAL; + } else if (connector->funcs->atomic_set_property) { + return connector->funcs->atomic_set_property(connector, + state, property, val); + } else { + return -EINVAL; + } +} +EXPORT_SYMBOL(drm_atomic_connector_set_property); + +/* + * This function handles generic/core properties and calls out to + * driver's ->atomic_get_property() for driver properties. To ensure + * consistent behavior you must call this function rather than the + * driver hook directly. + */ +static int +drm_atomic_connector_get_property(struct drm_connector *connector, + const struct drm_connector_state *state, + struct drm_property *property, uint64_t *val) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (property == config->prop_crtc_id) { + *val = (state->crtc) ? state->crtc->base.id : 0; + } else if (property == config->dpms_property) { + *val = connector->dpms; + } else if (connector->funcs->atomic_get_property) { + return connector->funcs->atomic_get_property(connector, + state, property, val); + } else { + return -EINVAL; + } + + return 0; +} + +int drm_atomic_get_property(struct drm_mode_object *obj, + struct drm_property *property, uint64_t *val) +{ + struct drm_device *dev = property->dev; + int ret; + + switch (obj->type) { + case DRM_MODE_OBJECT_CONNECTOR: { + struct drm_connector *connector = obj_to_connector(obj); + WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); + ret = drm_atomic_connector_get_property(connector, + connector->state, property, val); + break; + } + case DRM_MODE_OBJECT_CRTC: { + struct drm_crtc *crtc = obj_to_crtc(obj); + WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); + ret = drm_atomic_crtc_get_property(crtc, + crtc->state, property, val); + break; + } + case DRM_MODE_OBJECT_PLANE: { + struct drm_plane *plane = obj_to_plane(obj); + WARN_ON(!drm_modeset_is_locked(&plane->mutex)); + ret = drm_atomic_plane_get_property(plane, + plane->state, property, val); + break; + } + default: + ret = -EINVAL; + break; + } + + return ret; +} + +/** * drm_atomic_set_crtc_for_plane - set crtc for plane - * @state: the incoming atomic state - * @plane: the plane whose incoming state to update + * @plane_state: the plane whose incoming state to update * @crtc: crtc to use for the plane * * Changing the assigned crtc for a plane requires us to grab the lock and state @@ -358,16 +726,12 @@ EXPORT_SYMBOL(drm_atomic_get_connector_state); * sequence must be restarted. All other errors are fatal. */ int -drm_atomic_set_crtc_for_plane(struct drm_atomic_state *state, - struct drm_plane *plane, struct drm_crtc *crtc) +drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, + struct drm_crtc *crtc) { - struct drm_plane_state *plane_state = - drm_atomic_get_plane_state(state, plane); + struct drm_plane *plane = plane_state->plane; struct drm_crtc_state *crtc_state; - if (WARN_ON(IS_ERR(plane_state))) - return PTR_ERR(plane_state); - if (plane_state->crtc) { crtc_state = drm_atomic_get_crtc_state(plane_state->state, plane_state->crtc); @@ -583,14 +947,63 @@ EXPORT_SYMBOL(drm_atomic_legacy_backoff); */ int drm_atomic_check_only(struct drm_atomic_state *state) { - struct drm_mode_config *config = &state->dev->mode_config; + struct drm_device *dev = state->dev; + struct drm_mode_config *config = &dev->mode_config; + int nplanes = config->num_total_plane; + int ncrtcs = config->num_crtc; + int i, ret = 0; DRM_DEBUG_KMS("checking %p\n", state); + for (i = 0; i < nplanes; i++) { + struct drm_plane *plane = state->planes[i]; + + if (!plane) + continue; + + ret = drm_atomic_plane_check(plane, state->plane_states[i]); + if (ret) { + DRM_DEBUG_KMS("[PLANE:%d] atomic core check failed\n", + plane->base.id); + return ret; + } + } + + for (i = 0; i < ncrtcs; i++) { + struct drm_crtc *crtc = state->crtcs[i]; + + if (!crtc) + continue; + + ret = drm_atomic_crtc_check(crtc, state->crtc_states[i]); + if (ret) { + DRM_DEBUG_KMS("[CRTC:%d] atomic core check failed\n", + crtc->base.id); + return ret; + } + } + if (config->funcs->atomic_check) - return config->funcs->atomic_check(state->dev, state); - else - return 0; + 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 || + crtc_state->active_changed) { + DRM_DEBUG_KMS("[CRTC:%d] requires full modeset\n", + crtc->base.id); + return -EINVAL; + } + } + } + + return ret; } EXPORT_SYMBOL(drm_atomic_check_only); @@ -655,3 +1068,315 @@ int drm_atomic_async_commit(struct drm_atomic_state *state) 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 (copy_from_user(&prop_value, + prop_values_ptr + copied_props, + sizeof(prop_value))) { + 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; +} |