Hello,
I am an individual researcher working with a MeiG SRB877-CB device based on UNISOC UDX710/ORCA, running Linux 4.14.98. My device is not a Quectel product. Since RG500U/RG200U also use a UNISOC platform, I hope you can point me toward publicly available documentation or the appropriate legitimate application channel.
I am investigating native Linux audio initialization and the PCM interface. Are any public interface descriptions or initialization examples available for:
- The native audio HAL, particularly audiohal_phoenix, and its required startup sequence;
- The AGDSP shared-memory/profile ABI used by audio_structure, dsp_vbc and cvs, including profile version/compatibility requirements;
- Voice-call PCM routing, supported format/rate configuration, and the boundary between the application processor and modem/DSP;
- Where applicable, a publicly available corresponding GPL kernel/audio-driver source package for this platform.
I understand that the full QuecOpen SDK is subject to sales evaluation. I am asking only about public documentation, publicly distributable source, or the correct authorized route for an individual researcher. I am not requesting restricted proprietary code or firmware.
If these interfaces are specific to the device vendor or UNISOC release, a pointer to the appropriate documentation owner would also help.
Thank you.