[PATCH] ASoC: tlv320aic32x4: Add multi endpoint support

[PATCH] ASoC: tlv320aic32x4: Add multi endpoint support

[Marek Vasut]

Support multiple endpoints on TLV320AIC32x4 codec port when
used in of_graph context.

This patch allows to share the codec port between two CPU DAIs.

Example:

Custom STM32MP157C board uses TLV320AIC32x4 audio codec. This codec
is connected to two serial audio interfaces, which are configured
either as rx or tx.

From AsoC point of view the topolgy is the following:
// 2 CPU DAIs (SAI2A/B), 1 Codec (TLV320AIC32x4)
Playback: CPU-A-DAI(slave) -> (master)CODEC-DAI/port0
Record:   CPU-B-DAI(slave) <- (master)CODEC-DAI/port0

In the DT two endpoints have to be associated to the codec port:
tlv320aic32x4_port: port {
    tlv320aic32x4_tx_endpoint: endpoint@0 {
            remote-endpoint = <&sai2a_endpoint>;
    };
    tlv320aic32x4_rx_endpoint: endpoint@1 {
            remote-endpoint = <&sai2b_endpoint>;
    };
};

However, when the audio graph card parses the codec nodes, it expects
to find DAI interface indexes matching the endpoints indexes.

The current patch forces the use of DAI id 0 for both endpoints,
which allows to share the codec DAI between the two CPU DAIs
for playback and capture streams respectively.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: Baojun Xu <baojun.xu@ti.com>
Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
Cc: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Kevin Lu <kevin-lu@ti.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Mark Brown <broonie@kernel.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Shenghao Ding <shenghao-ding@ti.com>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org
Cc: kernel@dh-electronics.com
Cc: linux-sound@vger.kernel.org
---
 sound/soc/codecs/tlv320aic32x4.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index 5c0c81da06dba..54ea4bc58c276 100644
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -1073,6 +1073,13 @@ static int aic32x4_component_probe(struct snd_soc_component *component)
 	return 0;
 }
 
+static int aic32x4_of_xlate_dai_id(struct snd_soc_component *component,
+				   struct device_node *endpoint)
+{
+	/* return dai id 0, whatever the endpoint index */
+	return 0;
+}
+
 static const struct snd_soc_component_driver soc_component_dev_aic32x4 = {
 	.probe			= aic32x4_component_probe,
 	.set_bias_level		= aic32x4_set_bias_level,
@@ -1082,6 +1089,7 @@ static const struct snd_soc_component_driver soc_component_dev_aic32x4 = {
 	.num_dapm_widgets	= ARRAY_SIZE(aic32x4_dapm_widgets),
 	.dapm_routes		= aic32x4_dapm_routes,
 	.num_dapm_routes	= ARRAY_SIZE(aic32x4_dapm_routes),
+	.of_xlate_dai_id	= aic32x4_of_xlate_dai_id,
 	.suspend_bias_off	= 1,
 	.idle_bias_on		= 1,
 	.use_pmdown_time	= 1,
@@ -1203,6 +1211,7 @@ static const struct snd_soc_component_driver soc_component_dev_aic32x4_tas2505 =
 	.num_dapm_widgets	= ARRAY_SIZE(aic32x4_tas2505_dapm_widgets),
 	.dapm_routes		= aic32x4_tas2505_dapm_routes,
 	.num_dapm_routes	= ARRAY_SIZE(aic32x4_tas2505_dapm_routes),
+	.of_xlate_dai_id	= aic32x4_of_xlate_dai_id,
 	.suspend_bias_off	= 1,
 	.idle_bias_on		= 1,
 	.use_pmdown_time	= 1,
-- 
2.45.2

Re: [PATCH] ASoC: tlv320aic32x4: Add multi endpoint support

[Mark Brown]

On Sat, 31 Aug 2024 01:09:43 +0200, Marek Vasut wrote:
> Support multiple endpoints on TLV320AIC32x4 codec port when
> used in of_graph context.
> 
> This patch allows to share the codec port between two CPU DAIs.
> 
> Example:
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: tlv320aic32x4: Add multi endpoint support
      commit: 568dc2fae5d3697033f5e28cf4d6225b3db00461

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark