From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Jernej Skrabec Date: Tue, 10 Nov 2020 20:42:44 +0100 Subject: ASOC: sun9i-hdmi-audio: Initial implementation This implements HDMI audio sound card which is used to enable HDMI audio on all Allwinner SoCs with DW-HDMI core. First such SoC is A80, but it's been used on plenty of others, like A64, A83t, H2+, H3, H5, H6, R40 and V40. Signed-off-by: Jernej Skrabec --- sound/soc/sunxi/Kconfig | 8 + sound/soc/sunxi/Makefile | 1 + sound/soc/sunxi/sun9i-hdmi-audio.c | 180 ++++++++++ 3 files changed, 189 insertions(+) diff --git a/sound/soc/sunxi/Kconfig b/sound/soc/sunxi/Kconfig index 1f18f016acbb..6a17e49535bd 100644 --- a/sound/soc/sunxi/Kconfig +++ b/sound/soc/sunxi/Kconfig @@ -63,6 +63,14 @@ config SND_SUN50I_DMIC Say Y or M to add support for the DMIC audio block in the Allwinner H6 and affiliated SoCs. +config SND_SUN9I_HDMI_AUDIO + tristate "Allwinner sun9i HDMI Audio Sound Card" + depends on OF + depends on SND_SUN4I_I2S + help + Say Y or M to add support for the HDMI Audio sound card for Allwinner + SoCs with DW-HDMI core. + config SND_SUN8I_ADDA_PR_REGMAP tristate select REGMAP diff --git a/sound/soc/sunxi/Makefile b/sound/soc/sunxi/Makefile index 4483fe9c94ef..f9b7daf063fe 100644 --- a/sound/soc/sunxi/Makefile +++ b/sound/soc/sunxi/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_SND_SUN50I_CODEC_ANALOG) += sun50i-codec-analog.o obj-$(CONFIG_SND_SUN8I_CODEC) += sun8i-codec.o obj-$(CONFIG_SND_SUN8I_ADDA_PR_REGMAP) += sun8i-adda-pr-regmap.o obj-$(CONFIG_SND_SUN50I_DMIC) += sun50i-dmic.o +obj-$(CONFIG_SND_SUN9I_HDMI_AUDIO) += sun9i-hdmi-audio.o diff --git a/sound/soc/sunxi/sun9i-hdmi-audio.c b/sound/soc/sunxi/sun9i-hdmi-audio.c new file mode 100644 index 000000000000..fc8f03d398c0 --- /dev/null +++ b/sound/soc/sunxi/sun9i-hdmi-audio.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// sun9i hdmi audio sound card +// +// Copyright (C) 2021 Jernej Skrabec + +#include +#include + +#include +#include + +static int sun9i_hdmi_audio_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + unsigned int mclk; + + mclk = params_rate(params) * 128; + + return snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk, + SND_SOC_CLOCK_OUT); +} + +static const struct snd_soc_ops sun9i_hdmi_audio_ops = { + .hw_params = sun9i_hdmi_audio_hw_params, +}; + +static int sun9i_hdmi_audio_dai_init(struct snd_soc_pcm_runtime *rtd) +{ + int ret; + + /* TODO: switch to custom api once it's implemented in sun4i-i2s */ + ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), 0, 0, 2, 32); + if (ret) { + dev_err(asoc_rtd_to_cpu(rtd, 0)->dev, + "setting tdm link slots failed\n"); + return ret; + } + + return 0; +} + +static int sun9i_hdmi_audio_parse_dai(struct device_node *node, + struct snd_soc_dai_link_component *dlc) +{ + struct of_phandle_args args; + int ret; + + if (!node) + return 0; + + ret = of_parse_phandle_with_args(node, "sound-dai", + "#sound-dai-cells", 0, &args); + if (ret) + return ret; + + ret = snd_soc_get_dai_name(&args, &dlc->dai_name); + if (ret < 0) { + of_node_put(args.np); + + return ret; + } + + dlc->of_node = args.np; + + return 0; +} + +static int sun9i_hdmi_audio_probe(struct platform_device *pdev) +{ + struct snd_soc_dai_link_component *dlc; + struct device *dev = &pdev->dev; + struct snd_soc_dai_link *link; + struct snd_soc_card *card; + struct device_node *child; + int ret; + + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); + if (!card) + return -ENOMEM; + + link = devm_kzalloc(dev, sizeof(*link), GFP_KERNEL); + if (!link) + return -ENOMEM; + + dlc = devm_kzalloc(dev, sizeof(*dlc) * 3, GFP_KERNEL); + if (!dlc) + return -ENOMEM; + + child = of_get_child_by_name(dev->of_node, "codec"); + if (!child) + return -ENODEV; + + ret = sun9i_hdmi_audio_parse_dai(child, &dlc[1]); + of_node_put(child); + if (ret) + return ret; + + child = of_get_child_by_name(dev->of_node, "cpu"); + if (!child) { + ret = -ENODEV; + goto out_err; + } + + ret = sun9i_hdmi_audio_parse_dai(child, &dlc[0]); + of_node_put(child); + if (ret) + goto out_err; + + dlc[2].of_node = dlc[0].of_node; + + platform_set_drvdata(pdev, card); + + link->cpus = &dlc[0]; + link->codecs = &dlc[1]; + link->platforms = &dlc[2]; + + link->num_cpus = 1; + link->num_codecs = 1; + link->num_platforms = 1; + + link->playback_only = 1; + + link->name = "SUN9I-HDMI"; + link->stream_name = "SUN9I-HDMI PCM"; + + link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF | SND_SOC_DAIFMT_CBS_CFS; + + link->ops = &sun9i_hdmi_audio_ops; + link->init = sun9i_hdmi_audio_dai_init; + + card->dai_link = link; + card->num_links = 1; + card->owner = THIS_MODULE; + card->dev = dev; + card->name = "sun9i-hdmi"; + + ret = devm_snd_soc_register_card(dev, card); + if (ret) + goto out_err; + + return 0; + +out_err: + of_node_put(dlc[0].of_node); + of_node_put(dlc[1].of_node); + + return ret; +} + +static int sun9i_hdmi_audio_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + of_node_put(card->dai_link->cpus->of_node); + of_node_put(card->dai_link->codecs->of_node); + + return 0; +} + +static const struct of_device_id sun9i_hdmi_audio_match[] = { + { .compatible = "allwinner,sun9i-a80-hdmi-audio" }, + {} +}; +MODULE_DEVICE_TABLE(of, sun9i_hdmi_audio_match); + +static struct platform_driver sun9i_hdmi_audio_driver = { + .probe = sun9i_hdmi_audio_probe, + .remove = sun9i_hdmi_audio_remove, + .driver = { + .name = "sun9i-hdmi-audio", + .of_match_table = sun9i_hdmi_audio_match, + }, +}; +module_platform_driver(sun9i_hdmi_audio_driver); + +MODULE_DESCRIPTION("sun9i HDMI Audio Sound Card"); +MODULE_AUTHOR("Jernej Skrabec "); +MODULE_LICENSE("GPL v2"); -- Armbian