IMGU_PM_CTRL_START
writel(IMGU_PM_CTRL_RACE_TO_HALT | IMGU_PM_CTRL_START,
IMGU_PM_CTRL_START, 0)) {
writel(readl(base + IMGU_REG_PM_CTRL) | IMGU_PM_CTRL_START,
if (imgu_hw_wait(base, IMGU_REG_PM_CTRL, IMGU_PM_CTRL_START, 0)) {