I'm looking for a way to increase the VPU's performance. The current bottleneck is in the MMDC, who is busy giving service to CPU and IPU. So I thought I can increase its service priority in the MMDC.
According to the reference manual (MMDC->performance->Arbitration), the iMX6 MMDC is capable of QoS management, and even allowing real time service for all requests with QoS='f'.
If I understand correctly, then the IPU QoS is set in the IOMUX registers (IOMUXC_GPR6/7).
However, I failed finding the place in which this QoS parameter is configured for the VPU.
Is it possible to change the VPU QoS? If not, is there another way I can give the VPU better service?