This patch series adds the ABOX Generic audio management driver for Samsung ExynosAuto SoCs, along with IPC messaging and PCM frontend drivers, including their corresponding device tree bindings. ### ABOX Architecture Design: Fixed and Variable Structure The ABOX audio framework is designed with a clear split between: - **Fixed part** (common framework): reusable components across SoCs - Generic ABOX platform driver - IPC messaging handler - PCM frontend with ALSA compressed audio support - Solution manager for dynamic control - **Variable part** (SoC-specific): defined via device tree - IRQ numbers, stream IDs, buffer sizes, and ADSP allocation - Defined per PCM/IPC device node in DTS This separation allows the fixed part to be upstreamed and maintained as a reusable framework, while only the DTS and minimal changes are needed to adapt to each SoC generation. ### Major Components in This Series - `abox_generic`: Root platform driver coordinating subcomponents - `abox_ipc_generic`: Handles ADSP messaging via IRQ-based IPC - `abox_pcm_dev`: PCM frontend with support for solution chain selection - `abox_solution_mgr`: Manages software-based audio chains via dynamic kcontrols ### Testing Tested on ExynosAuto v920 board: - Verified ALSA compressed audio playback via DSP - Confirmed solution switching via kcontrol - Verified DT node parsing and IRQ routing from device tree
