static int mdss_mdp_rotator_pipe_dequeue(struct mdss_mdp_rotator_session *rot)
{
if (rot->pipe) {
pr_debug("reusing existing session=%d\n", rot->pipe->num);
mdss_mdp_rotator_busy_wait(rot);
list_move_tail(&rot->head, &rotator_queue);
} else {
struct mdss_mdp_rotator_session *tmp;
rot->params_changed++;
rot->pipe = mdss_mdp_rotator_pipe_alloc();
if (rot->pipe) {
pr_debug("use new rotator pipe=%d\n", rot->pipe->num);
rot->pipe->mixer_stage = MDSS_MDP_STAGE_UNUSED;
list_add_tail(&rot->head, &rotator_queue);
} else if (!list_empty(&rotator_queue)) {
tmp = list_first_entry(&rotator_queue,
struct mdss_mdp_rotator_session,
head);
pr_debug("wait for rotator pipe=%d\n", tmp->pipe->num);
mdss_mdp_rotator_busy_wait(tmp);
rot->pipe = tmp->pipe;
tmp->pipe = NULL;
list_del(&tmp->head);
list_add_tail(&rot->head, &rotator_queue);
} else {
static int mdss_mdp_rotator_pipe_dequeue(struct mdss_mdp_rotator_session *rot)
{
int rc;
if (rot->pipe) {
pr_debug("reusing existing session=%d\n", rot->pipe->num);
mdss_mdp_rotator_busy_wait(rot);
list_move_tail(&rot->head, &rotator_queue);
} else {
struct mdss_mdp_rotator_session *tmp;
rot->params_changed++;
rot->pipe = mdss_mdp_rotator_pipe_alloc();
if (rot->pipe) {
pr_debug("use new rotator pipe=%d\n", rot->pipe->num);
list_add_tail(&rot->head, &rotator_queue);
} else if (!list_empty(&rotator_queue)) {
tmp = list_first_entry(&rotator_queue,
struct mdss_mdp_rotator_session,
head);
rc = mdss_mdp_rotator_busy_wait(tmp);
list_del(&tmp->head);
if (rc) {
pr_err("no pipe attached to session=%d\n",
tmp->session_id);
return rc;
} else {
pr_debug("waited for rotator pipe=%d\n",
tmp->pipe->num);
}
rot->pipe = tmp->pipe;
tmp->pipe = NULL;
list_add_tail(&rot->head, &rotator_queue);
} else {
