236 lines
6.1 KiB
Diff
236 lines
6.1 KiB
Diff
From 4d133082fa943128d2909124400060e2c42e8d56 Mon Sep 17 00:00:00 2001
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From: Jernej Skrabec <jernej.skrabec@gmail.com>
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Date: Tue, 10 Nov 2020 20:42:44 +0100
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Subject: [PATCH 374/478] ASOC: sun9i-hdmi-audio: Initial implementation
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This implements HDMI audio sound card which is used to enable HDMI audio
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on all Allwinner SoCs with DW-HDMI core. First such SoC is A80, but it's
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been used on plenty of others, like A64, A83t, H2+, H3, H5, H6, R40 and
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V40.
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Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
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---
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sound/soc/sunxi/Kconfig | 8 ++
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sound/soc/sunxi/Makefile | 1 +
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sound/soc/sunxi/sun9i-hdmi-audio.c | 180 +++++++++++++++++++++++++++++
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3 files changed, 189 insertions(+)
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create mode 100644 sound/soc/sunxi/sun9i-hdmi-audio.c
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diff --git a/sound/soc/sunxi/Kconfig b/sound/soc/sunxi/Kconfig
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index ddcaaa98d3cb..150ab2e3de76 100644
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--- a/sound/soc/sunxi/Kconfig
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+++ b/sound/soc/sunxi/Kconfig
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@@ -56,6 +56,14 @@ config SND_SUN4I_SPDIF
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Say Y or M to add support for the S/PDIF audio block in the Allwinner
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A10 and affiliated SoCs.
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+config SND_SUN9I_HDMI_AUDIO
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+ tristate "Allwinner sun9i HDMI Audio Sound Card"
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+ depends on OF
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+ depends on SND_SUN4I_I2S
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+ help
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+ Say Y or M to add support for the HDMI Audio sound card for Allwinner
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+ SoCs with DW-HDMI core.
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+
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config SND_SUN8I_ADDA_PR_REGMAP
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tristate
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select REGMAP
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diff --git a/sound/soc/sunxi/Makefile b/sound/soc/sunxi/Makefile
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index a86be340a076..e0e1042cbd49 100644
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--- a/sound/soc/sunxi/Makefile
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+++ b/sound/soc/sunxi/Makefile
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@@ -6,3 +6,4 @@ obj-$(CONFIG_SND_SUN8I_CODEC_ANALOG) += sun8i-codec-analog.o
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obj-$(CONFIG_SND_SUN50I_CODEC_ANALOG) += sun50i-codec-analog.o
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obj-$(CONFIG_SND_SUN8I_CODEC) += sun8i-codec.o
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obj-$(CONFIG_SND_SUN8I_ADDA_PR_REGMAP) += sun8i-adda-pr-regmap.o
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+obj-$(CONFIG_SND_SUN9I_HDMI_AUDIO) += sun9i-hdmi-audio.o
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diff --git a/sound/soc/sunxi/sun9i-hdmi-audio.c b/sound/soc/sunxi/sun9i-hdmi-audio.c
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new file mode 100644
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index 000000000000..fc8f03d398c0
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--- /dev/null
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+++ b/sound/soc/sunxi/sun9i-hdmi-audio.c
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@@ -0,0 +1,180 @@
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+// SPDX-License-Identifier: GPL-2.0
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+//
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+// sun9i hdmi audio sound card
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+//
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+// Copyright (C) 2021 Jernej Skrabec <jernej.skrabec@gmail.com>
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+
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+#include <linux/module.h>
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+#include <linux/of_platform.h>
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+
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+#include <sound/soc.h>
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+#include <sound/soc-dai.h>
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+
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+static int sun9i_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
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+ struct snd_pcm_hw_params *params)
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+{
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+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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+ unsigned int mclk;
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+
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+ mclk = params_rate(params) * 128;
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+
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+ return snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk,
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+ SND_SOC_CLOCK_OUT);
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+}
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+
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+static const struct snd_soc_ops sun9i_hdmi_audio_ops = {
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+ .hw_params = sun9i_hdmi_audio_hw_params,
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+};
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+
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+static int sun9i_hdmi_audio_dai_init(struct snd_soc_pcm_runtime *rtd)
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+{
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+ int ret;
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+
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+ /* TODO: switch to custom api once it's implemented in sun4i-i2s */
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+ ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), 0, 0, 2, 32);
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+ if (ret) {
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+ dev_err(asoc_rtd_to_cpu(rtd, 0)->dev,
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+ "setting tdm link slots failed\n");
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int sun9i_hdmi_audio_parse_dai(struct device_node *node,
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+ struct snd_soc_dai_link_component *dlc)
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+{
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+ struct of_phandle_args args;
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+ int ret;
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+
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+ if (!node)
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+ return 0;
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+
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+ ret = of_parse_phandle_with_args(node, "sound-dai",
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+ "#sound-dai-cells", 0, &args);
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+ if (ret)
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+ return ret;
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+
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+ ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
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+ if (ret < 0) {
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+ of_node_put(args.np);
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+
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+ return ret;
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+ }
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+
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+ dlc->of_node = args.np;
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+
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+ return 0;
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+}
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+
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+static int sun9i_hdmi_audio_probe(struct platform_device *pdev)
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+{
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+ struct snd_soc_dai_link_component *dlc;
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+ struct device *dev = &pdev->dev;
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+ struct snd_soc_dai_link *link;
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+ struct snd_soc_card *card;
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+ struct device_node *child;
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+ int ret;
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+
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+ card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
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+ if (!card)
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+ return -ENOMEM;
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+
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+ link = devm_kzalloc(dev, sizeof(*link), GFP_KERNEL);
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+ if (!link)
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+ return -ENOMEM;
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+
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+ dlc = devm_kzalloc(dev, sizeof(*dlc) * 3, GFP_KERNEL);
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+ if (!dlc)
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+ return -ENOMEM;
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+
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+ child = of_get_child_by_name(dev->of_node, "codec");
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+ if (!child)
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+ return -ENODEV;
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+
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+ ret = sun9i_hdmi_audio_parse_dai(child, &dlc[1]);
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+ of_node_put(child);
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+ if (ret)
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+ return ret;
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+
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+ child = of_get_child_by_name(dev->of_node, "cpu");
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+ if (!child) {
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+ ret = -ENODEV;
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+ goto out_err;
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+ }
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+
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+ ret = sun9i_hdmi_audio_parse_dai(child, &dlc[0]);
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+ of_node_put(child);
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+ if (ret)
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+ goto out_err;
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+
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+ dlc[2].of_node = dlc[0].of_node;
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+
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+ platform_set_drvdata(pdev, card);
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+
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+ link->cpus = &dlc[0];
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+ link->codecs = &dlc[1];
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+ link->platforms = &dlc[2];
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+
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+ link->num_cpus = 1;
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+ link->num_codecs = 1;
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+ link->num_platforms = 1;
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+
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+ link->playback_only = 1;
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+
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+ link->name = "SUN9I-HDMI";
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+ link->stream_name = "SUN9I-HDMI PCM";
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+
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+ link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF | SND_SOC_DAIFMT_CBS_CFS;
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+
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+ link->ops = &sun9i_hdmi_audio_ops;
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+ link->init = sun9i_hdmi_audio_dai_init;
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+
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+ card->dai_link = link;
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+ card->num_links = 1;
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+ card->owner = THIS_MODULE;
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+ card->dev = dev;
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+ card->name = "sun9i-hdmi";
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+
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+ ret = devm_snd_soc_register_card(dev, card);
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+ if (ret)
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+ goto out_err;
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+
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+ return 0;
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+
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+out_err:
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+ of_node_put(dlc[0].of_node);
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+ of_node_put(dlc[1].of_node);
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+
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+ return ret;
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+}
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+
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+static int sun9i_hdmi_audio_remove(struct platform_device *pdev)
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+{
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+ struct snd_soc_card *card = platform_get_drvdata(pdev);
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+
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+ of_node_put(card->dai_link->cpus->of_node);
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+ of_node_put(card->dai_link->codecs->of_node);
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+
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+ return 0;
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+}
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+
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+static const struct of_device_id sun9i_hdmi_audio_match[] = {
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+ { .compatible = "allwinner,sun9i-a80-hdmi-audio" },
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+ {}
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+};
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+MODULE_DEVICE_TABLE(of, sun9i_hdmi_audio_match);
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+
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+static struct platform_driver sun9i_hdmi_audio_driver = {
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+ .probe = sun9i_hdmi_audio_probe,
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+ .remove = sun9i_hdmi_audio_remove,
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+ .driver = {
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+ .name = "sun9i-hdmi-audio",
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+ .of_match_table = sun9i_hdmi_audio_match,
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+ },
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+};
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+module_platform_driver(sun9i_hdmi_audio_driver);
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+
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+MODULE_DESCRIPTION("sun9i HDMI Audio Sound Card");
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+MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@gmail.com>");
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+MODULE_LICENSE("GPL v2");
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--
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2.35.3
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