[PATCH v3 0/4] ROCK 4D audio enablement

[Nicolas Frattaroli]

Hi Alexandre, and other maintainers,

On Wednesday, 8 April 2026 19:49:38 Central European Summer Time Nicolas Frattaroli wrote:
> The ROCK 4D uses an ADC input to distinguish between a headphone (i.e.,
> no mic) and a headset (i.e., with mic). After some searching, it appears
> that the closest we can get to modelling this is by sending a particular
> switch input event.
> 
> So this series modifies the adc-keys bindings, extends the adc-keys
> driver to allow sending other input types as well, and then adds the
> analog audio nodes to ROCK 4D's device tree.
> 
> It should be noted that analog capture from the TRRS jack currently
> results in completely digitally silent audio for me, i.e. no data other
> than 0xFF. There's a few reasons why this could happen, chief among them
> that my SAI driver is broken or that the ES8328 codec driver is once
> again broken. The DAPM routes when graphed out look fine though. So the
> DTS part is correct, and I can fix the broken capture in a separate
> follow-up patch that doesn't have to include DT people.
> 
> Another possibility is that my phone headset, despite being 4 rings and
> having a little pin hole at the back of the volume doodad, does not
> actually have a microphone, but in that case I'd still expect some noise
> in the PCM. Maybe it's just shy.
> 
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli at collabora.com>
> ---
> Changes in v3:
> - bindings: use unevaluatedProperties instead of explicitly mentioning
>   linux,input-type.
> - Link to v2: https://lore.kernel.org/r/20251215-rock4d-audio-v2-0-82a61de39b4c@collabora.com
> 
> Changes in v2:
> - Drop HDMI audio patch, as it was already merged.
> - adc-keys: rename "keycode" to "code".
> - adc-keys: make the keycode (now "code") local a u32 instead of an int
> - adc-keys: only allow EV_KEY and EV_SW for now. Rename patch
>   accordingly.
> - adc-keys: Add another patch to rework probe function error logging.
> - Link to v1: https://lore.kernel.org/r/20250630-rock4d-audio-v1-0-0b3c8e8fda9c@collabora.com
> 
> ---
> Nicolas Frattaroli (4):
>       dt-bindings: input: adc-keys: allow all input properties
>       Input: adc-keys - support EV_SW as well, not just EV_KEY.
>       Input: adc-keys - Use dev_err_probe in probe function
>       arm64: dts: rockchip: add analog audio to ROCK 4D
> 
>  .../devicetree/bindings/input/adc-keys.yaml        | 17 ++--
>  arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts    | 90 ++++++++++++++++++++++
>  drivers/input/keyboard/adc-keys.c                  | 88 ++++++++++-----------
>  3 files changed, 147 insertions(+), 48 deletions(-)
> ---
> base-commit: 8de395f35e79d9168a78504fed495578ec7bac52
> change-id: 20250627-rock4d-audio-cfc07f168a08
> 
> Best regards,
> --  
> Nicolas Frattaroli <nicolas.frattaroli at collabora.com>
> 
> 

What's the path forward here? All the patches are reviewed, but it
has been almost a month without them being applied now.

Which tree(s) would this be applied to, and who should I poke?

Thanks :)

Kind regards,
Nicolas Frattaroli