firmware/br-ext-chip-allwinner/board/v83x/kernel/patches/00000-sound_soc_sunxi_sunxi-sndspdif.c.patch

diff -drupN a/sound/soc/sunxi/sunxi-sndspdif.c b/sound/soc/sunxi/sunxi-sndspdif.c
--- a/sound/soc/sunxi/sunxi-sndspdif.c	1970-01-01 03:00:00.000000000 +0300
+++ b/sound/soc/sunxi/sunxi-sndspdif.c	2022-06-12 05:28:14.000000000 +0300
@@ -0,0 +1,181 @@
+/*
+ * sound\soc\sunxi\sunxi_sndspdif.c
+ * (C) Copyright 2010-2016
+ * AllWinner Technology Co., Ltd. <www.allwinnertech.com>
+ * wolfgang huang <huangjinhui@allwinnertech.com>
+ *
+ * some simple description for this code
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include "sunxi-spdif.h"
+
+struct platform_device *sunxi_snd_spdif_utils_device;
+
+static int sunxi_sndspdif_hw_params(struct snd_pcm_substream *substream,
+					struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret, clk_div;
+	unsigned int freq;
+
+	switch (params_rate(params)) {
+	case	24000:
+	case	32000:
+	case	48000:
+	case	96000:
+	case	192000:
+#if defined(CONFIG_AHUB_FREQ_REQ)
+		freq = 98304000;
+#else
+		freq = 24576000;
+#endif
+		break;
+	case	22050:
+	case	44100:
+	case	176400:
+#if defined(CONFIG_AHUB_FREQ_REQ)
+		freq = 90316800;
+#else
+		freq = 22579200;
+#endif
+		break;
+	default:
+		pr_debug("[sunxi spdif]Invalid rate\n");
+		return -EINVAL;
+	}
+
+	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, freq, 0);
+	if (ret < 0)
+		return ret;
+
+	clk_div = freq/params_rate(params);
+	clk_div = clk_div>>7;
+
+#if defined(CONFIG_ARCH_SUN50IW9)
+	clk_div = clk_div/4;
+#endif
+	ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, clk_div);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct snd_soc_ops sunxi_sndspdif_ops = {
+	.hw_params	= sunxi_sndspdif_hw_params,
+};
+
+static struct snd_soc_dai_link sunxi_sndspdif_dai_link = {
+	.name		= "SPDIF",
+	.stream_name	= "SUNXI-SPDIF",
+	.cpu_dai_name	= "sunxi-spdif",
+	.platform_name	= "sunxi-spdif",
+	.codec_dai_name	= "spdif-hifi",
+	.codec_name	= "spdif-utils",
+	.ops		= &sunxi_sndspdif_ops,
+};
+
+static struct snd_soc_card snd_soc_sunxi_sndspdif = {
+	.name		= "sndspdif",
+	.owner		= THIS_MODULE,
+	.dai_link	= &sunxi_sndspdif_dai_link,
+	.num_links	= 1,
+};
+
+static int sunxi_sndspdif_dev_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+	struct snd_soc_card *card = &snd_soc_sunxi_sndspdif;
+	struct device_node *np = pdev->dev.of_node;
+
+	card->dev = &pdev->dev;
+	sunxi_sndspdif_dai_link.cpu_dai_name = NULL;
+	sunxi_sndspdif_dai_link.cpu_of_node = of_parse_phandle(np,
+				"sunxi,spdif-controller", 0);
+	if (!sunxi_sndspdif_dai_link.cpu_of_node) {
+		dev_err(&pdev->dev,
+			"Property 'sunxi,spdif-controller' missing\n");
+			ret = -EINVAL;
+	}
+	sunxi_sndspdif_dai_link.platform_name = NULL;
+	sunxi_sndspdif_dai_link.platform_of_node =
+				sunxi_sndspdif_dai_link.cpu_of_node;
+
+	sunxi_snd_spdif_utils_device = platform_device_alloc("spdif-utils", -1);
+	if (sunxi_snd_spdif_utils_device == NULL) {
+		dev_err(&pdev->dev, "spdif utils alloc failed\n");
+		return -ENOMEM;
+	}
+
+	ret = platform_device_add(sunxi_snd_spdif_utils_device);
+	if (ret) {
+		dev_err(&pdev->dev, "spdif utils add failed\n");
+		ret = -EBUSY;
+		goto err_utils_put;
+	}
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
+		ret = -EBUSY;
+		goto err_utils_del;
+	}
+	return ret;
+
+err_utils_del:
+	platform_device_del(sunxi_snd_spdif_utils_device);
+err_utils_put:
+	platform_device_put(sunxi_snd_spdif_utils_device);
+	return ret;
+}
+
+static int sunxi_sndspdif_dev_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_card(card);
+
+	platform_device_del(sunxi_snd_spdif_utils_device);
+	platform_device_put(sunxi_snd_spdif_utils_device);
+
+	return 0;
+}
+
+static const struct of_device_id sunxi_spdif_of_match[] = {
+	{ .compatible = "allwinner,sunxi-spdif-machine", },
+	{},
+};
+
+static struct platform_driver sunxi_spdif_driver = {
+	.driver = {
+		.name = "sndspdif",
+		.owner = THIS_MODULE,
+		.of_match_table = sunxi_spdif_of_match,
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = sunxi_sndspdif_dev_probe,
+	.remove = sunxi_sndspdif_dev_remove,
+};
+
+module_platform_driver(sunxi_spdif_driver);
+
+MODULE_AUTHOR("wolfgang huang <huangjinhui@allwinnertech.com>");
+MODULE_DESCRIPTION("SUNXI SPDIF ASoC audio driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:sndspdif");