TAS67524 Linux Driver

This repo contains the Linux driver for the TI TAS67524-Q1 (TAS675x family) - a quad-channel Class-D audio amplifier with onboard DSP and load diagnostics. The patches are based on linux-next and are being prepared for upstream submission.

Branch: main - 7 patches on top of next-20260320

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What's included

• DT binding (ti,tas67524.yaml) - device tree schema for TAS67524
• ASoC codec driver - full driver with 3 DAI endpoints, DAPM, volume controls, load diagnostics, fault monitoring, and suspend/resume support
• McASP update - audio-graph-card2 DPCM topology support in davinci-mcasp (experimental, for demonstration)
• DTS overlays - two overlays for the AM62D2-EVM with TAS67CD-AEC daughter card:
  • k3-am62d-evm-tas67cd-aec.dtso — audio-graph-card2 DPCM topology (main + LLP + I/V feedback capture)
  • k3-am62d-evm-tas67cd-aec-simple.dtso — simple-audio-card, main audio only (no LLP, no feedback)
• Documentation - mixer controls, fault monitoring reference with usage examples
• MAINTAINERS - entry for TAS67524 driver and bindings

The patch files are in the patches/ directory.

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Getting started

1. Get linux-next base

git clone https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
cd linux-next
git checkout next-20260320

2. Apply patches

git clone https://github.com/SenWang125/tas67-linux.git
cd linux-next
git am ../tas67-linux/patches/*.patch

3. Enable driver and McASP in kernel config

scripts/config --module CONFIG_SND_SOC_TAS675X
scripts/config --module CONFIG_SND_SOC_DAVINCI_MCASP

4. Build

export ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
make olddefconfig
make Image dtbs modules -j$(nproc)

5. Deploy to AM62D2-EVM

Copy the kernel image, modules, and DTB overlay to the board. Then configure U-Boot to load the overlay by editing uEnv.txt on the boot partition:

For the full DPCM topology (audio-graph-card2 with LLP and I/V feedback):

name_overlays=ti/k3-am62d-evm-tas67cd-aec.dtbo

For the simple-audio-card (main audio path only, easier bring-up):

name_overlays=ti/k3-am62d-evm-tas67cd-aec-simple.dtbo

Example on target:

# Mount boot partition if not already mounted
mount /dev/mmcblk1p1 /run/media/boot-mmcblk1p1

# Edit uEnv.txt
vi /run/media/boot-mmcblk1p1/uEnv.txt
# Add one of the name_overlays lines above

# Reboot
reboot

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Hardware setup

Validated on the AM62D-EVM with a TAS67CD-AEC daughter card. The device tree overlay (k3-am62d-evm-tas67cd-aec.dtso) sets up a full audio-graph-card2 DPCM topology on McASP2.

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Test scripts

The test_scripts/ directory contains a test suite for validating the driver on target hardware. Run on the board after loading the driver.

Script	Description
run_ldg_tests.sh	DC / AC / real-time load diagnostics
run_dsp_tests.sh	DSP signal path modes and protection
test_dsp_lock.sh	Concurrent DSP access (mutex)
test_playback_capture.sh	Playback / capture, rates, RTLDG verify
test_tas67cd_aec.sh	Real audio playback + feedback capture (needs sample_audio.wav)
test_channel_control.sh	Per-channel auto-mute, RTLDG, volume
test_volume_control.sh	Volume ranges and persistence
test_fault_injection.sh	Error handling and recovery
test_integration_stress.sh	Multi-operation sustained stress
test_power_management.sh	Suspend / resume (requires sudo)
test_sample_rate.sh	Sample rate switching
test_multi_codec.sh	4x codec concurrent (AM62D2-EVM)

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Upstream status

The driver-only patches (binding, codec, docs, MAINTAINERS) are at v6 on the linux-sound mailing list. The McASP DPCM and DTS overlay patches are not yet submitted upstream and are provided here for evaluation.

• v6 on lore
• GitHub: https://github.com/SenWang125/tas67-linux