kernel/system: Bringup Sound

[ssysm]

Sound Bringup: mici and tizi

Commit 20cf50d — mici sound bringup

This established the foundational sound infrastructure for the SDM845 platform.

Kernel DTS (kernel/dts/sdm845-comma-common.dtsi)

• Added a stub generic-codec device (since the audio path uses the DSP, not a discrete codec)
• Enabled adsp_pas (ADSP peripheral authentication service) pointing to qcom/sdm845/adsp.mdt
• Configured the Q6AFE DAI for SECONDARY_MI2S_RX (playback, SD line 1) and SECONDARY_MI2S_TX (capture, SD line 0)
• Wired up the full ALSA sound card with two frontend DAIs (MultiMedia1/2) and playback/capture backend links routed through SECONDARY_MI2S via the Q6 routing graph

ADSP startup (userspace/root/usr/comma/sound/adsp-start.sh)

• Rewrote the script to support both the modern remoteproc interface and the legacy msm_subsys interface, auto-detecting which is present
• Probes multiple firmware paths, attempts to mount the modem partition if needed

Sound init (userspace/root/usr/comma/sound/sound_init.sh)

• Replaced the hardcoded sdm845tavilsndc card name check with a generic "wait until any card appears" loop
• Added a wait_for_tinymix_control helper that polls for SEC_MI2S_RX Audio Mixer MultiMedia1

Sound watchdog (userspace/root/usr/comma/sound/sound_watchdog.sh) — new file

• The runit service (userspace/root/etc/sv/sound/run) was changed from a one-shot to a persistent watchdog
• Every 2 seconds: if soundcards are present, re-asserts the playback route; if they disappear, re-runs sound_init.sh

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Commit 25f7779 — tizi sound bringup

Adds microphone/capture support specifically for tizi, which uses a MAX98089 amp with digital mics wired through DAI1 → TERTIARY MI2S (GPIO 74–78), rather than the secondary MI2S used for mici.

Kernel patch (0012)

• Adds tert_mi2s pinctrl states to sdm845.dtsi
• Fixes a bug where SECONDARY_MI2S_RX startup/shutdown fell through to the TX clock path, causing EINVAL
• Adds TERTIARY_MI2S_TX clock handling

DTS (kernel/dts/sdm845-comma-tizi.dts)

• Registers a new main5v fixed regulator (GPIO 25) needed to power the amp
• Adds a qi2s@21 Q6AFE DAI node for TERTIARY_MI2S_TX with SD line 0
• Overrides the common &sound node: changes the model name, swaps pinctrl to use tert_mi2s pins for capture (drops sec_mi2s_sd0, keeps sec_mi2s_sd1 for playback), and re-routes the capture-dai-link CPU to TERTIARY_MI2S_TX instead of secondary

Common DTS (kernel/dts/sdm845-comma-common.dtsi)

• Adds sec_mi2s_mclk pinctrl states to the mici pinctrl (needed by both devices)

Watchdog (userspace/root/usr/comma/sound/sound_watchdog.sh)

• Detects tizi via /sys/firmware/devicetree/base/model
• On tizi, also periodically re-asserts MultiMedia1 Mixer TERT_MI2S_TX (the capture route) in addition to the playback route

[robin-reckmann]

These can go into the mici/tizi dts.

[robin-reckmann]

better to move just the generic codec into its own patch

[robin-reckmann]

These can go into the mici/tizi dts.

[github-actions]

vamOS System Profile

Changes vs master

Metric	Change
Used space	3481.1MB → 3481.1MB (+0MB)
Sparse image	3435.6MB → 3435.6MB (0MB)
Package count	524 → 524

Directory size changes (>1MB)

Directory	Change

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Metric	Value
Used space	3481.1MB / 5959.5MB
Files	56331
Directories	4762
Symlinks	3602
Packages	524

Top 10 Directories

Directory	Size

Category Breakdown

Category	Size	%
xbps packages	2484.5MB	71.3%
Python venv	655.3MB	18.8%
Firmware	11.5MB	.3%
Other	329.7MB	9.4%

Top 10 Packages by Size

Package	Size
mit-krb5-libs-1.21.3_1	270.4MB
gawk-5.3.2_1	210.3MB
llvm-21_3	148.6MB
libldns-1.9.0_1	124.3MB
pd-mapper-1.0_1	73.9MB
libclang21-21.1.7_1	70.2MB
glib-2.86.1_2	67.1MB
gcc-14.2.1+20250405_4	65.4MB
libcap-progs-2.77_1	56MB
cmake-4.2.2_1	53.2MB

Top 30 Files by Size

File	Size
/usr/lib/llvm/21/lib/libLLVM.so.21.1	124.3MB
/usr/lib/llvm/21/lib/libMLIR.so.21.1	89.7MB
/usr/lib/llvm/21/bin/mlir-transform-opt	82.9MB
/usr/lib/llvm/21/lib/libclang-cpp.so.21.1	56MB
/usr/lib/llvm/21/bin/mlir-translate	53.2MB
/usr/lib/llvm/21/bin/llvm-exegesis	52MB
/usr/lib/llvm/21/bin/llvm-bolt-binary-analysis	50.6MB
/usr/local/venv/lib/python3.12/site-packages/ffmpeg/install/lib/libavcodec.a	50.5MB
/usr/bin/uv	48.1MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/gnat1	40.1MB
/usr/bin/gdb	38.1MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1plus	37.3MB
/usr/lib/libgallium-25.3.3.so	35.4MB
/usr/lib/libllvm-qcom.so	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/lto1	33.9MB
/usr/bin/lto-dump	33.9MB
/usr/lib/libRusticlOpenCL.so.1.0.0	32.5MB
/usr/local/venv/bin/ruff	31.8MB
/usr/share/icu/78.2/icudt78l.dat	31.5MB
/usr/lib/llvm/21/lib/libclang.so.21.1.7	30.2MB
/usr/lib/llvm/21/bin/c-index-test	28.6MB
/usr/local/venv/lib/python3.12/site-packages/gcc_arm_none_eabi/toolchain/libexec/gcc/arm-none-eabi/13.2.1/cc1	28.2MB
/usr/lib/libz3.so	27.9MB
/usr/bin/run	26.6MB
/usr/local/venv/lib/python3.12/site-packages/numpy.libs/libscipy_openblas64_-71e1b124.so	23.6MB
/usr/comma/updater	23.5MB
/usr/comma/setup	23.5MB
/usr/comma/reset	23.5MB
/usr/local/uv/python/cpython-3.12.13-linux-aarch64-gnu/bin/python3.12	22.1MB