Differentiate between the screen off case where kgsl shouldn't hold a pm_qos vote and the screen on case where power rails may be turned off after a long idle. restore_slumber now corresponds to the screen on/off while strtstp_sleepwake covers the power rail collapse. CRs-Fixed: 386956 Change-Id: Id4318f1aa87d6ad0653fe5db18c5d33bda1cc8bb Signed-off-by: Lucille Sylvester <lsylvest@codeaurora.org>