mdp_clk_ctrl on is not called when commit is from overlay commit path which can cause mdp hang. mdp_clk_ctrl off should be after mdp overlay2 is done, so schedule a work in overlay2 done isr. Change-Id: I94fd08da27cfda114f5cc0056a5103f0a9b772f6 Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>