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Tue, 22 Sep 2026 09:01:31 -0700 (PDT) From: Valerio Setti Subject: [PATCH v3 0/7] ASoC: meson: gx: add base support for I2S audio input Date: Tue, 22 Sep 2026 18:00:45 +0200 Message-Id: <20260922-audin-v3-0-a760312c076c@baylibre.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAC2msmoC/12Nyw6CMBQFf8V0bU1fCrjyP4yLPi5yjYJpoZEQ/ t0WNDEuJzkzZyIBPEIgx81EPEQM2LUJ5HZDbKPbK1B0iYlg4sBKyakeHLa0stoYtWfWVoqk7dN Dja+lc76sHAZzA9tnOS8aDH3nx+Uo8rxbmxUXn2bklNGiNlBDJcqC85PR4x2Nh53tHiRno/gVi 68okihLB8pY7kCqP3Ge5zfgu7el6AAAAA== X-Change-ID: 20260831-audin-9cabb450cc94 To: Jerome Brunet , Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Martin Blumenstingl , Jaroslav Kysela , Takashi Iwai Cc: linux-sound@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, Valerio Setti X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=5272; i=vsetti@baylibre.com; h=from:subject:message-id; bh=XzmF4J3qkuosZ/gMZETPgqXgKdShUdzjl28XPraIrmU=; b=owGbwMvMwCV2z3ty7kUrRgbG02pJDFmbloWGXumYF6Siv0A8etvdfGeZbf524n3M16WkV9Q7J 6gm3fzWUcrCIMbFICumyMIy/d7vglK1h8YJJwtg5rAygQxh4OIUgIm8PcXIMG334pDvBeoXWp6l f7mgf3/e1a2vWE14e9/fSe3qqGSdIc7wV9ZHhZ0/zdDOd1Fdas+WS592HXPnm+68SiJqVt0u6XP dfAA= X-Developer-Key: i=vsetti@baylibre.com; a=openpgp; fpr=0497DEFB707526E13360C970DE4B936DD13A0100 This series is the 2nd part of the initial RFC [1] proposed to add audio input support to the Meson GX SoCs. After the AIU reshaping series [2] that has recently been merged, this one adds the audio input path itself. Apart from some glue commits for gx-formatter Kconfig split, a fix for i2s clock divider disabling in aiu-encoder-i2s, DT, bindings and integration with gx-card, the core commit is the 4th one, which adds the AUDIN driver. This is the counterpart of AIU for capture: it gets the entire register range, it handles peripheral clock and reset, it instantiates the I2S data formatter as widget and FIFOs as DAIs. Resulting capture topology is: pads --> AIU I2S Encoder -> AUDIN I2S Formatter -> AUDIN FIFO -> RAM This series includes all the changes related to this work (dt-bindings, drivers and device-tree) in order to give the full picture in one single place. Unfortunately, since no Meson GXBB/GXL board available in the tree features an I2S capture capable codec, this work cannot be directly tested out of the box. To test it an external codec must be connected to the SoC. When working on this series, a custom hat board with an NXP SGTL5000 codec has been plugged on top of an Odroid-C2 (GXBB). The last commit of this series fully details all the device-tree changes which are required to finalize the support for this scenario. With this hardware configuration it has been possible to successfully validate the implementation with: - alsa tools (arecord) - pcm-tests [1]: https://lore.kernel.org/linux-sound/20260411-audin-rfc-v2-0-4c8a6ec5fcab@baylibre.com/ [2]: https://lore.kernel.org/linux-sound/20260610-reshape-aiu-as-axg-v2-0-cac3663a8b51@baylibre.com/ Signed-off-by: Valerio Setti --- Changes in v3: - Fixed i2s clock divider disabling in 'aiu-encoder-i2s' 'hw_free'. [Sashiko] - Specified const value of "#sound-dai-cells" property in dt-binding. [Sashiko] - Advance 'last_pos' by whole periods in the FIFO polling timer to avoid drifting period notifications. [Sashiko] - Link to v2: https://patch.msgid.link/20260917-audin-v2-0-38de4bc1de34@baylibre.com Changes in v2: - Dropped FIFO child nodes from AUDIN in device-tree. Now AUDIN is the only sound component and FIFOs are its DAIs. This is the same design used in AIU. [Krzysztof] - Renamed driver compatible, using 'amlogic,gx-audin' as fallback and 'amlogic,gx[bb|l]-audin' as SoC specific. Fixed also other reported comments on the binding. [Krzysztof] - Adjusted headers inclusion in 'audin.c' and spacing in the empty entry of 'meson_gx_audin_of_match'. [Uwe] - Replaced 'snd_soc_component_read' with 'regmap_read' in 'audin_fifo_pos' in order to prevent sleeping in atomic context. Also changed the hrtimer from hard-irq to a soft-irq one. [Sashiko] - Added 'sync_stop' callback in 'audin_component' to ensure the hrtimer is fully stopped before attempting to restart the stream in a "start->stop->prepare->start" scenario. - Link to v1: https://patch.msgid.link/20260912-audin-v1-0-7fbefe928711@baylibre.com To: Jerome Brunet To: Liam Girdwood To: Mark Brown To: Rob Herring To: Krzysztof Kozlowski To: Conor Dooley To: Valerio Setti To: Jaroslav Kysela To: Takashi Iwai To: Neil Armstrong To: Kevin Hilman To: Martin Blumenstingl Cc: linux-sound@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-amlogic@lists.infradead.org --- Valerio Setti (7): ASoC: dt-bindings: amlogic,gx-audin: add schema ASoC: meson: build gx-formatter as a separate module ASoC: meson: aiu-encoder-i2s: ensure clk divider gets disabled in hw_free ASoC: meson: add AUDIN driver ASoC: meson: aiu: add I2S Capture DAI ASoC: meson: gx-card: add support for audin FIFO arm64: dts: amlogic: gx: add AUDIN node .../bindings/sound/amlogic,gx-audin.yaml | 69 ++++ arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 9 + arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 6 + arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 6 + sound/soc/meson/Kconfig | 14 + sound/soc/meson/Makefile | 7 +- sound/soc/meson/aiu-encoder-i2s.c | 12 +- sound/soc/meson/aiu.c | 7 + sound/soc/meson/audin-fifo.c | 371 +++++++++++++++++++++ sound/soc/meson/audin-formatter-i2s.c | 174 ++++++++++ sound/soc/meson/audin.c | 188 +++++++++++ sound/soc/meson/audin.h | 30 ++ sound/soc/meson/gx-card.c | 16 +- 13 files changed, 894 insertions(+), 15 deletions(-) --- base-commit: cee9395acd8043be0644b25c34bfa86623f2b935 change-id: 20260831-audin-9cabb450cc94 Best regards, -- Valerio Setti