On 25/03/2023 14:21, Dylan Van Assche wrote: > The Qualcomm SDM845 SoC has a separate SLPI (Sensor Low Power Island) > DSP for sensors connected to the SoC which is responsible for exposing > sensors to userspace, power saving, and other features. > While sensors are connected to GPIOs of the SoC, they cannot be used > because the hypervisor blocks direct access to the sensors, thus the > DSP must be used to access any sensor on this SoC. The SLPI DSP uses a > GLink edge (dsps) to communicate with the host and has a FastRPC interface > to load files from the host filesystem such as sensor configuration files. > The FastRPC interface does not use regular FastRPC Compute Banks > but instead uses an allocated CMA region through which communication happens. > > This set of patches adds support to drivers for the SLPI DSP: > 1. Configure the permissions of assigned DSP memory through the hypervisor. > 2. Allocate a remote heap when the FastRPC session ID is 0 instead of using > a Compute Bank directly. > 3. Add the SLPI remoteproc resource to the q6v5_pas driver to enable support > for it in the driver. > over QRTR. > > DTS changes to enable the SLPI DSP in the SDM845 DTS and hardware > e.g. Oneplus 6 and SHIFTPHONES SHIFT6mq will be send once the driver changes > are applied. No, as we explained on IRC, we expect DTS to be sent the same time. Best regards, Krzysztof
