DISPC supports a power management protocol
with the device Power Sleep Controller (PSC).
The (software) sequence, while performing a
clkstop_req to DISPC, is as follows:
- Disable DISPC by programing the [0] ENABLE bit of DSS_VP1_CONTROL register to 0.
- DISPC hardware completes the output of the current frame. Then
hardware sets the DSS_COMMON_DSS_SYSSTATUS[9]
DISPC_IDLE_STATUS register bit to 1.
- Poll the DISPC_IDLE_STATUS bit to ensure that DISPC is in idle
mode.
- PSC initiates clkstop_req to DISPC.
- DISPC hardware acknowledges with clkstop_ack immediately.