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

[Alexandre Belloni]

Hello Nicolas,

I guess Dmitry is the one that would take patches 1 to 3. You should
probably resend once the merge window has closed.

On 11/05/2026 18:21:40+0200, Nicolas Frattaroli wrote:
> 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@xxxxxxxxxxxxx>
> > ---
> > 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@xxxxxxxxxxxxx
> > 
> > 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@xxxxxxxxxxxxx
> > 
> > ---
> > 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@xxxxxxxxxxxxx>
> > 
> > 
> 
> 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
> 
> 
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com