[PATCH v2 0/4] ASoC: meson: aiu: align I2S design to the AXG one

[Jerome Brunet]

On mer. 10 juin 2026 at 23:29, Valerio Setti <vsetti at baylibre.com> wrote:

> The goal of this series is to reshape Amlogic GX's AIU implementation for
> I2S to let it follow the same design as in AXG's TDM. Keeping the same
> design allows for unifying the two platform implementations in the future
> and it also allows for an easy addition of I2S input.
>
> The first commit introduces gx-formatter as the basic block which takes
> care of properly formatting audio data. Formatters are DAPM widgets
> (c.f. axg-tdm-formatter in AXG) which are dynamically attached/detached
> to the streams when the latters starts/stop, respectively.
> aiu-formatter-i2s is introduced as formatter implementation for the i2s
> output.
>
> By the end aiu-encoder-i2s will only need to handle interface clocks and
> enforce interface wide rate symmetry (c.f axg-tdm-interface on the AXG
> platform). Right now rate symmetry is not relevant because only i2s output
> is supported, but it will become useful when following patch series will
> introduce the i2s input part.
>
> This series was tested on an OdroidC2 board (Amlogic S905 SOC) both with
> HDMI output and with NXP SGTL5000 codec connected to the I2S pins.
> This series was also verified using "pcm-test" test tool and all tests
> are passing.
>
> Changes in v2:
> - Fixed most of the weaknesses found by Sashiko review tool [1].
> - Resolved testing failures with "pcm-test" as reported by Mark Brown
>   (thanks for the heads up!). I left a comment in
>   "aiu_encoder_i2s_startup" to explain the fix.
>
> Link to v1: https://lore.kernel.org/r/20260515-reshape-aiu-as-axg-v1-0-53b457784ff3@baylibre.com
>
> [1]: https://sashiko.dev/#/patchset/20260515-reshape-aiu-as-axg-v1-0-53b457784ff3%40baylibre.com
>
> Signed-off-by: Valerio Setti <vsetti at baylibre.com>

Nice work. Thanks for taking the time to understand the existing drivers
and build upon them !

Reviewed-by: Jerome Brunet <jbrunet at baylibre.com>

Feel free to add yourself as maintainer of the Amlogic audio drivers, if
you fancy doing so ;)

> ---
> Valerio Setti (4):
>       ASoC: meson: gx: add gx-formatter and gx-interface
>       ASoC: meson: aiu-encoder-i2s: prepare for multiple streams
>       ASoC: meson: aiu: introduce I2S output formatter
>       ASoC: meson: aiu: use aiu-formatter-i2s to format I2S output data
>
>  sound/soc/meson/Makefile            |   2 +
>  sound/soc/meson/aiu-encoder-i2s.c   | 281 +++++++++++++++++++++++++----------
>  sound/soc/meson/aiu-formatter-i2s.c | 104 +++++++++++++
>  sound/soc/meson/aiu.c               |  32 +++-
>  sound/soc/meson/aiu.h               |   4 +
>  sound/soc/meson/gx-formatter.c      | 282 ++++++++++++++++++++++++++++++++++++
>  sound/soc/meson/gx-formatter.h      |  56 +++++++
>  sound/soc/meson/gx-interface.h      |  48 ++++++
>  8 files changed, 731 insertions(+), 78 deletions(-)
> ---
> base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731
> change-id: 20260515-reshape-aiu-as-axg-1dac9037cad3
>
> Best regards,

-- 
Jerome