CRITICALITY

Low

DESCRIPTION

Dynamic Voltage Frequency Scaling (DVFS) refers to a software technique where the various SoC AVS rails are changed from one OPP level to another in order to either adapt to a changing work-load, or in order to avoid device operation outside of desired temperature bounds.

The SoC only supports DVFS on the MPU rail.

WORKAROUND

Software may use DVFS only on the MPU rail. For example, SW may change the MPU operation from OPP_NOM (1 GHz, at OPP_NOM AVS voltage level) to OPP_HIGH (1.5 GHz, at OPP_HIGH AVS voltage level) in order to accommodate an increased work-load, or may change the MPU operation from OPP_HIGH to OPP_NOM if the temperature exceeds a certain threshold.

The supply rails and OPP conditions (Frequency/Voltage) for non-MPU rails should be set at boot-time and remain at that OPP voltage level during device run-time.

REVISIONS IMPACTED

DRA72x SR 2.0, 1.0
DRA71x SR 2.1, 2.0

DRA79x: 2.1, 2.0

TDA2Ex (23mm): 2.0, 1.0

TDA2Ex (17mm): 2.1, 2.0

AM571x: 2.1, 2.0, 1.0

AM570x: 2.1, 2.0

DRA72x: 2.0, 1.0

DRA71x: 2.1, 2.0