new file mode 100644
@@ -0,0 +1,12 @@
+Rockchip cdn dp audio bindings
+
+Required properties:
+- compatible: platform specific, must be "rockchip,cdn-dp-audio"
+- i2s-controller: the device of i2s controller
+
+Example:
+
+ cdn_dp_audio: cdn-dp_audio {
+ compatible = "rockchip,cdn-dp-audio";
+ i2s-controller = <&i2s2>;
+ };
@@ -15,6 +15,15 @@ config SND_SOC_ROCKCHIP_I2S
Rockchip I2S device. The device supports upto maximum of
8 channels each for play and record.
+config SND_SOC_ROCKCHIP_CDN_DP_AUDIO
+ tristate "cdn DP audio support"
+ depends on ROCKCHIP_CDN_DP
+ select SND_SOC_ROCKCHIP_I2S
+ select SND_SOC_CDN_DP_AUDIO
+ help
+ Say Y or M here if you want to add support for SoC audio on Rockchip
+ boards using the cdn dp codec, such as RK3399.
+
config SND_SOC_ROCKCHIP_SPDIF
tristate "Rockchip SPDIF Device Driver"
depends on CLKDEV_LOOKUP && SND_SOC_ROCKCHIP
@@ -5,8 +5,10 @@ snd-soc-rockchip-spdif-objs := rockchip_spdif.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-rockchip-i2s.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_SPDIF) += snd-soc-rockchip-spdif.o
+snd-soc-rockchip-cdn-dp-objs := rockchip-cdn-dp-audio.o
snd-soc-rockchip-max98090-objs := rockchip_max98090.o
snd-soc-rockchip-rt5645-objs := rockchip_rt5645.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_CDN_DP_AUDIO) += snd-soc-rockchip-cdn-dp.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_MAX98090) += snd-soc-rockchip-max98090.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_RT5645) += snd-soc-rockchip-rt5645.o
new file mode 100644
@@ -0,0 +1,167 @@
+/*
+ * rockchip-cdn-dp-card.c
+ *
+ * ROCKCHIP ALSA SoC DAI driver for cdn dp audio on rockchip processors.
+ *
+ * Copyright (C) 2016 Chris Zhong <zyw@rock-chips.com>
+ * Copyright (C) 2016 ROCKCHIP, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/core.h>
+#include <sound/pcm_params.h>
+
+#include "rockchip_i2s.h"
+
+#define DRV_NAME "rockchip-cdn-dp-audio"
+
+static int cdn_dp_audio_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;
+ unsigned int dai_fmt = rtd->dai_link->dai_fmt;
+ int mclk, ret;
+
+ switch (params_rate(params)) {
+ case 8000:
+ case 16000:
+ case 24000:
+ case 32000:
+ case 48000:
+ case 64000:
+ case 96000:
+ mclk = 12288000;
+ break;
+ case 11025:
+ case 22050:
+ case 44100:
+ case 88200:
+ mclk = 11289600;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
+ if (ret < 0) {
+ dev_err(cpu_dai->dev, "failed to set cpu_dai fmt.\n");
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, SND_SOC_CLOCK_OUT);
+ if (ret < 0) {
+ dev_err(cpu_dai->dev, "failed to set cpu_dai sysclk.\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_ops cdn_dp_dai_ops = {
+ .hw_params = cdn_dp_audio_hw_params,
+};
+
+static struct snd_soc_dai_link cdn_dp_dai = {
+ .name = "cdn_dp",
+ .stream_name = "cdn_dp",
+ .codec_name = "cdn-dp-audio",
+ .codec_dai_name = "cdn-dp-hifi",
+ .ops = &cdn_dp_dai_ops,
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+};
+
+static struct snd_soc_card cdn_dp_audio_card = {
+ .name = "cdn_dp",
+ .owner = THIS_MODULE,
+ .dai_link = &cdn_dp_dai,
+ .num_links = 1,
+};
+
+static int cdn_dp_audio_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = &cdn_dp_audio_card;
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ card->dev = &pdev->dev;
+ platform_set_drvdata(pdev, card);
+
+ cdn_dp_dai.cpu_of_node = of_parse_phandle(np, "i2s-controller", 0);
+ if (!cdn_dp_dai.cpu_of_node) {
+ dev_err(&pdev->dev, "Property 'i2s-controller' missing !\n");
+ goto free_priv_data;
+ }
+
+ cdn_dp_dai.platform_of_node = cdn_dp_dai.cpu_of_node;
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err(&pdev->dev, "register card failed (%d)\n", ret);
+ card->dev = NULL;
+ goto free_cpu_of_node;
+ }
+
+ dev_info(&pdev->dev, "rockchip cdn dp audio init success.\n");
+
+ return 0;
+
+free_cpu_of_node:
+ cdn_dp_dai.cpu_of_node = NULL;
+ cdn_dp_dai.platform_of_node = NULL;
+free_priv_data:
+ snd_soc_card_set_drvdata(card, NULL);
+ platform_set_drvdata(pdev, NULL);
+ card->dev = NULL;
+
+ return ret;
+}
+
+static int cdn_dp_audio_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ snd_soc_unregister_card(card);
+ snd_soc_card_set_drvdata(card, NULL);
+ platform_set_drvdata(pdev, NULL);
+ card->dev = NULL;
+
+ return 0;
+}
+
+static const struct of_device_id cdn_dp_audio_of_match[] = {
+ { .compatible = "rockchip,cdn-dp-audio", },
+ {},
+};
+
+static struct platform_driver cdn_dp_audio_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = cdn_dp_audio_of_match,
+ },
+ .probe = cdn_dp_audio_probe,
+ .remove = cdn_dp_audio_remove,
+};
+module_platform_driver(cdn_dp_audio_driver);
+
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_DESCRIPTION("CDN DP Audio ASoC Interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, cdn_dp_audio_of_match);
The driver is used for cdn dp codec embedded in rk3399 Signed-off-by: Chris Zhong <zyw@rock-chips.com> --- .../bindings/sound/rockchip-cdn-dp-audio.txt | 12 ++ sound/soc/rockchip/Kconfig | 9 ++ sound/soc/rockchip/Makefile | 2 + sound/soc/rockchip/rockchip-cdn-dp-audio.c | 167 +++++++++++++++++++++ 4 files changed, 190 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/rockchip-cdn-dp-audio.txt create mode 100644 sound/soc/rockchip/rockchip-cdn-dp-audio.c