[PATCH v2 0/9] ASoC: mediatek: mt2701: HDMI audio support

Daniel Golle
2026-04-20T01:13:36Z

This series wires up on-chip HDMI audio on MT2701 and MT7623N, from the
DRM bridge down through the AFE into a small machine driver that binds
the AFE HDMI BE to the HDMI TX codec already exposed by the
mediatek-drm-hdmi driver. Bindings, DT and a BananaPi R2 board node
are included.

In order to survive vblank or late hotplug of the monitor, the fix
submitted separately [1] is required as well.

Everything here was developed for and tested on a BananaPi R2
(MT7623N), which turns ten years old this year -- a nice occasion to
finally land HDMI audio for a SoC which was truly ahead of its time.

[1]: https://patchwork.kernel.org/project/linux-mediatek/patch/a3e22cbae528c9a38d854a586d1736b860998d41.1776265222.git.daniel@makrotopia.org/

Changes since v1:
* Restrict the four HDMI clocks to mediatek,mt2701-audio only
using an allOf/if/then conditional; MT7622 is capped at 34
clocks (Krzysztof Kozlowski)
* Fix subject prefix to use schema filename (Krzysztof Kozlowski)
* Rewrite title and description to describe hardware, not driver
(Krzysztof Kozlowski)
* Clarify in commit message why this is a separate binding from
mediatek,mt2701-audio (Krzysztof Kozlowski)
* use named masks and explicitly set BIT_WIDTH_16 when
programming AFE_HDMI_OUT_CON0 channel count (Mark Brown)
* add AUDIO_TOP_CON3, AFE_HDMI_OUT_CON0, AFE_HDMI_CONN0,
AFE_8CH_I2S_OUT_CON to suspend/resume backup list
(Mark Brown)

Daniel Golle (9):
ASoC: dt-bindings: mt2701-afe-pcm: add HDMI audio path clocks
ASoC: dt-bindings: mediatek,mt2701-hdmi-audio: add HDMI audio output
binding
ASoC: mediatek: mt2701: add AFE HDMI register definitions
ASoC: mediatek: mt2701: add optional HDMI audio path clocks
ASoC: mediatek: mt2701: add HDMI audio memif, FE and BE DAIs
ASoC: mediatek: mt2701: add machine driver for on-chip HDMI codec
ARM: dts: mediatek: mt2701: wire HDMI audio path clocks into AFE
ARM: dts: mediatek: mt7623: wire HDMI audio path clocks into AFE
ARM: dts: mediatek: mt7623n-bananapi-bpi-r2: add HDMI audio machine
node

.../bindings/sound/mediatek,mt2701-audio.yaml | 23 ++
.../sound/mediatek,mt2701-hdmi-audio.yaml | 48 +++
arch/arm/boot/dts/mediatek/mt2701.dtsi | 21 +-
arch/arm/boot/dts/mediatek/mt7623.dtsi | 21 +-
.../dts/mediatek/mt7623n-bananapi-bpi-r2.dts | 7 +
sound/soc/mediatek/Kconfig | 10 +
sound/soc/mediatek/mt2701/Makefile | 1 +
.../mediatek/mt2701/mt2701-afe-clock-ctrl.c | 22 ++
sound/soc/mediatek/mt2701/mt2701-afe-common.h | 6 +
sound/soc/mediatek/mt2701/mt2701-afe-pcm.c | 293 +++++++++++++++++-
sound/soc/mediatek/mt2701/mt2701-hdmi.c | 114 +++++++
sound/soc/mediatek/mt2701/mt2701-reg.h | 35 +++
12 files changed, 590 insertions(+), 11 deletions(-)
create mode 100644 Documentation/devicetree/bindings/sound/mediatek,mt2701-hdmi-audio.yaml
create mode 100644 sound/soc/mediatek/mt2701/mt2701-hdmi.c

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2.53.0