Renesas provides the R-Car S4 SDK, software that runs on the R-Car S4 SoC.
This video, Part 2 of Sample Linux Application and Driver in the 'R-Car S4 Startup Guide', explains 'Sample SCIF, DMA and IPMMU drivers' as the following steps.
- Introduce change baud rate on SCIF driver.
- Build and run sample application of DMA with IPMMU driver.