drm_atomic_get_connector_state() allocates a new connector state by duplicating the current one and inserts it into the atomic commit as a single operation.
However, a later change will need to insert a connector state into a commit without going through the full allocation and duplication path in drm_atomic_get_connector_state(). Extract the state insertion logic, including the dynamic array reallocation, into a new static drm_atomic_commit_set_connector_state() helper, and convert drm_atomic_get_connector_state() to use it. Reviewed-by: Daniel Stone <[email protected]> Signed-off-by: Maxime Ripard <[email protected]> --- drivers/gpu/drm/drm_atomic.c | 60 ++++++++++++++++++++++++++++---------------- 1 file changed, 38 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 513e91ad2fdc..81591173265d 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1402,10 +1402,42 @@ drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_commit *state, return conn_state->crtc; } EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder); +static int drm_atomic_commit_set_connector_state(struct drm_atomic_commit *commit, + struct drm_connector *connector, + struct drm_connector_state *connector_state) +{ + struct drm_mode_config *config = &connector->dev->mode_config; + int index = drm_connector_index(connector); + + drm_modeset_lock_assert_held(&config->connection_mutex); + + if (index >= commit->num_connector) { + struct __drm_connnectors_state *c; + int alloc = max(index + 1, config->num_connector); + + c = krealloc_array(commit->connectors, alloc, + sizeof(*commit->connectors), GFP_KERNEL | __GFP_ZERO); + if (!c) + return -ENOMEM; + + commit->connectors = c; + commit->num_connector = alloc; + } + + drm_connector_get(connector); + commit->connectors[index].state_to_destroy = connector_state; + commit->connectors[index].old_state = connector->state; + commit->connectors[index].new_state = connector_state; + commit->connectors[index].ptr = connector; + connector_state->state = commit; + + return 0; +} + /** * drm_atomic_get_connector_state - get connector state * @state: global atomic state object * @connector: connector to get state object for * @@ -1420,50 +1452,34 @@ EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder); */ struct drm_connector_state * drm_atomic_get_connector_state(struct drm_atomic_commit *state, struct drm_connector *connector) { - int ret, index; + int ret; struct drm_mode_config *config = &connector->dev->mode_config; struct drm_connector_state *connector_state; WARN_ON(!state->acquire_ctx); drm_WARN_ON(state->dev, state->checked); ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); if (ret) return ERR_PTR(ret); - index = drm_connector_index(connector); - - if (index >= state->num_connector) { - struct __drm_connnectors_state *c; - int alloc = max(index + 1, config->num_connector); - - c = krealloc_array(state->connectors, alloc, - sizeof(*state->connectors), GFP_KERNEL | __GFP_ZERO); - if (!c) - return ERR_PTR(-ENOMEM); - - state->connectors = c; - state->num_connector = alloc; - } - connector_state = drm_atomic_get_new_connector_state(state, connector); if (connector_state) return connector_state; connector_state = connector->funcs->atomic_duplicate_state(connector); if (!connector_state) return ERR_PTR(-ENOMEM); - drm_connector_get(connector); - state->connectors[index].state_to_destroy = connector_state; - state->connectors[index].old_state = connector->state; - state->connectors[index].new_state = connector_state; - state->connectors[index].ptr = connector; - connector_state->state = state; + ret = drm_atomic_commit_set_connector_state(state, connector, connector_state); + if (ret) { + connector->funcs->atomic_destroy_state(connector, connector_state); + return ERR_PTR(ret); + } drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n", connector->base.id, connector->name, connector_state, state); -- 2.55.0
