{"id":104586,"date":"2022-07-03T15:36:48","date_gmt":"2022-07-03T13:36:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupen-sound-open-firmware-2-2-nabor-otkrytyh-proshivok-k-dsp-chipam"},"modified":"2022-07-03T15:36:48","modified_gmt":"2022-07-03T13:36:50","slug":"dostupen-sound-open-firmware-2-2-nabor-otkrytyh-proshivok-k-dsp-chipam","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/dostupen-sound-open-firmware-2-2-nabor-otkrytyh-proshivok-k-dsp-chipam","title":{"rendered":"Sound Open Firmware 2.2 is now available, a set of open firmware for DSP chips.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

The release of Sound Open Firmware 2.2 (SOF) has been published, originally created by Intel to move away from providing closed firmware for DSP chips related to audio processing. The project has since been brought under the auspices of the Linux Foundation and is now developed with community involvement and participation from companies such as AMD, Google, and NXP. The project is developing an SDK to simplify firmware development, a sound driver for the Linux kernel, and a set of pre-built firmware for various DSP chips, including binary builds that are signed with a digital signature. The firmware code is written in C with assembler inserts and is distributed under the BSD license. <\/p>\n

Thanks to its modular structure, Sound Open Firmware can be ported to various DSP architectures and hardware platforms. For instance, among the supported platforms, various Intel chips (Broadwell, Icelake, Tigerlake, Alderlake, etc.), Mediatek (mt8195), NXP (i.MX8*), and AMD (Renoir) equipped with DSP based on Xtensa HiFi architectures 2, 3, and 4 are listed. A special emulator or QEMU can be used during development. The use of open firmware for DSP allows for quicker fixes and diagnostics of issues in the firmware and also enables users to adapt the firmware for their needs, make specific optimizations, and create lightweight versions of the firmware containing only the necessary functionalities for their products. <\/p>\n

The project provides a framework for the development, optimization, and testing of solutions related to sound processing, as well as for creating drivers and programs for interacting with DSP. It includes firmware implementations, tools for testing firmware, utilities for converting ELF files into firmware images suitable for installation on hardware, debugging tools, a DSP emulator, a host platform emulator (based on QEMU), firmware tracing tools, MATLAB\/Octave scripts for fine-tuning coefficients for sound components, applications for establishing interaction and data exchange with the firmware, and ready-made examples of sound processing topologies. <\/p>\n

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The project is also developing a universal driver that can be used with devices utilizing firmware based on Sound Open Firmware. The driver has already been included in the mainline Linux kernel since version 5.2 and is distributed under a dual license \u2014 BSD and GPLv2. This driver is responsible for loading the firmware into the DSP memory, loading audio topologies into the DSP, managing the operation of the audio device (it handles calls to DSP functions from applications) and providing applications with access points to audio data. The driver also offers an IPC mechanism for communication between the host system and the DSP, and a layer for accessing the hardware capabilities of the DSP through a standard API. DSPs with Sound Open Firmware firmware appear to applications as a standard ALSA device, which can be managed using the standard application interface. <\/p>\n

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Key innovations in Sound Open Firmware 2.2: <\/p>\n