SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The SECURE bit in DSS0_VID_SECURE, DSS0_WB_SECURE, DSS0_OVR_SECURE and DSS0_VP_SECURE registers is set/reset by a secure transaction. When the SECURE bit has been set, the software in "secure mode" is responsible for checking the DISPC configuration. The SECURE bit is propagated by DISPC to the system Interconnect in order to qualify all DISPC requests as secure or non-secure requests, based on the secure bits defined in the control register.
When DISPC accesses the frame buffer, in the case the SECURE bit has been reset and the frame buffer has been set secure, the DISPC will receive an "error" in response of non-secure requests.