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Linux 7.4 sound subsystem merges ALSA hardening, AMD Zen 6 ACP support, deprecated OSS sequencer

Brief written by the FOSSWire AI editor from Phoronix How we write

2 min read

Key Takeaway

The Linux 7.4 sound pull request includes core ALSA race condition fixes, new AMD ACP 7.0/7.F IP for upcoming Zen 6 platforms, and marks the OSS sequencer emulation code as deprecated amid continued AI-generated patch volume.

Summary

Linux sound subsystem maintainer Takashi Iwai has merged the Linux 7.4 sound pull request, which spans core code hardening, new hardware enablement, and codec additions. The core ALSA code received fixes for race conditions, a buffer leak in compression offload, and race fixes in JACK handling, alongside broader C bug fixes. The OSS sequencer emulation code has been marked as deprecated in this release.

Hardware support expands with compressed audio playback on SOF IPC4 for Intel Tigerlake and newer, plus AMD ACP 7.0/7.F sound IP with SoundWire and PDM controller support targeting upcoming Ryzen Zen 6 platforms. New codec drivers cover the ESS ES9039Q2M DAC, Nuvoton NAU83G60 amplifier, and Senary SN624x SoundWire SDCA codec. Laptop-specific quirks were added for numerous Intel and AMD systems from Lenovo, ASUS, HP, Acer, HONOR, and MSI. A new Qualcomm QAIF driver also lands for the Shikra platform.

ALSA hardening and hardware enablement in Linux 7.4

  • Core ALSA hardening: Race condition fixes applied to core ALSA code, plus a buffer leak fix in the compression offload path and race fixes in JACK code.
  • OSS deprecation: The OSS sequencer emulation code is marked as deprecated for Linux 7.4, signaling eventual removal of this legacy compatibility layer.
  • Intel SOF IPC4: Compressed audio playback support added for SOF IPC4 on Intel Tigerlake and newer platforms.
  • AMD ACP 7.0/7.F: New sound IP support with SoundWire and PDM controller, appearing on upcoming Ryzen Zen 6 platforms.
  • New codec drivers: ESS ES9039Q2M, Nuvoton NAU83G60 amplifier, Senary SN624x SoundWire SDCA, and Qualcomm QAIF for Shikra platform.

Why it matters

The deprecation of OSS sequencer emulation continues Linux's long-term cleanup of legacy audio APIs, affecting users of older MIDI applications who will need to migrate to ALSA-native solutions. The AMD ACP 7.0/7.F enablement ahead of Zen 6 silicon availability ensures day-one audio support for next-generation Ryzen platforms, while the extensive laptop quirks demonstrate the continued challenge of enabling reliable Linux audio on diverse OEM hardware. Distribution maintainers should note the OSS deprecation for release notes and migration guidance.

Original reference: www.phoronix.com →