SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
As part of the system-wide power-management scheme, the display subsystem supports the MStandby/MWait and SIdleReq/SIdleAck protocols:
The PRCM module asserts the MWait and received MStandby directly from DISPC. When the display subsystem initiates a standby procedure, it also initiates a master standby/wait protocols with the PRCM module that lets the PRCM module cut the display subsystem clocks. For information about the conditions that allow the subsystem to exit standby mode, see Section 11.2.1 DISPC Overview, in Display Controller.
The PRCM also asserts the SIdleReq. Then, it is split at the display subsystem level and send to the appropriate modules. Consequently, all SIdleAck are merged into one and sent back to PRCM.