[PATCH 0/4] Add SPDIF support for rockchip

[PATCH 0/4] Add SPDIF support for rockchip

[Sjoerd Simons]

This patchset adds support for the Rockchip SPDIF transceiver as present on
RK3066, RK3188 and RK3288 boards and enables it on a Radxa rock pro.

Tested on a Radxa Rock Pro board.

Sjoerd Simons (4):
  ASoC: dt-bindings: add rockchip tranceiver bindings
  ASoc: rockchip: Add rockchip SPDIF transceiver driver
  ARM: dts: rockchip: Add SPDIF transceiver for RK3188
  ARM: dts: rockchip: Add SPDIF optical out on Radxa Rock

 .../devicetree/bindings/sound/rockchip-spdif.txt   |  41 +++
 arch/arm/boot/dts/rk3188-radxarock.dts             |  19 ++
 arch/arm/boot/dts/rk3188.dtsi                      |  22 ++
 sound/soc/rockchip/Kconfig                         |   9 +
 sound/soc/rockchip/Makefile                        |   3 +
 sound/soc/rockchip/rockchip_spdif.c                | 375 +++++++++++++++++++++
 sound/soc/rockchip/rockchip_spdif.h                |  63 ++++
 7 files changed, 532 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip-spdif.txt
 create mode 100644 sound/soc/rockchip/rockchip_spdif.c
 create mode 100644 sound/soc/rockchip/rockchip_spdif.h

-- 
2.4.6

[PATCH 1/4] ASoC: dt-bindings: add rockchip tranceiver bindings

[Sjoerd Simons]

Add devicetree bindings for the spdif tranceiver found on
found on rk3066, rk3188 and rk3288 SoCs

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
---
 .../devicetree/bindings/sound/rockchip-spdif.txt   | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip-spdif.txt

diff --git a/Documentation/devicetree/bindings/sound/rockchip-spdif.txt b/Documentation/devicetree/bindings/sound/rockchip-spdif.txt
new file mode 100644
index 0000000..2da8a09
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/rockchip-spdif.txt
@@ -0,0 +1,41 @@
+* Rockchip SPDIF transceiver
+
+The S/PDIF audio block is a stereo transceiver that allows the
+processor to receive and transmit digital audio via an coaxial cable or
+a fibre cable.
+
+Required properties:
+
+- compatible: should be one of the following:
+   - "rockchip,rk3066-spdif": for rk3066
+   - "rockchip,rk3188-spdif", "rockchip,rk3066-spdif": for rk3188
+   - "rockchip,rk3288-spdif", "rockchip,rk3066-spdif": for rk3288
+- reg: physical base address of the controller and length of memory mapped
+  region.
+- interrupts: should contain the SPDIF interrupt.
+- #address-cells: should be 1.
+- #size-cells: should be 0.
+- dmas: DMA specifiers for tx dma. See the DMA client binding,
+  Documentation/devicetree/bindings/dma/dma.txt
+- dma-names: should be "tx"
+- clocks: a list of phandle + clock-specifier pairs, one for each entry
+  in clock-names.
+- clock-names: should contain following:
+   - "spdif_hclk": clock for SPPIF controller
+   - "spdif_clk" : clock for SPDIF bus
+
+Example for the rk3188 SPDIF controller:
+
+spdif: spdif at 0x1011e000 {
+	compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";
+	reg = <0x1011e000 0x2000>;
+	interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	dmas = <&dmac1_s 8>;
+	dma-names = "tx";
+	clock-names = "spdif_hclk", "spdif_clk";
+	clocks = <&cru HCLK_SPDIF>, <&cru SCLK_SPDIF>;
+	status = "disabled";
+	#sound-dai-cells = <0>;
+};
-- 
2.4.6

[PATCH 2/4] ASoc: rockchip: Add rockchip SPDIF transceiver driver

[Sjoerd Simons]

Add a driver for the SDPIF transceiver available on RK3066, RK3188 and
RK3288. Heavily based on the rockchip i2s driver.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
---
 sound/soc/rockchip/Kconfig          |   9 +
 sound/soc/rockchip/Makefile         |   3 +
 sound/soc/rockchip/rockchip_spdif.c | 375 ++++++++++++++++++++++++++++++++++++
 sound/soc/rockchip/rockchip_spdif.h |  63 ++++++
 4 files changed, 450 insertions(+)
 create mode 100644 sound/soc/rockchip/rockchip_spdif.c
 create mode 100644 sound/soc/rockchip/rockchip_spdif.h

diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig
index 58bae8e..20bc676 100644
--- a/sound/soc/rockchip/Kconfig
+++ b/sound/soc/rockchip/Kconfig
@@ -15,6 +15,14 @@ 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_SPDIF
+	tristate "Rockchip SPDIF Device Driver"
+	depends on CLKDEV_LOOKUP && SND_SOC_ROCKCHIP
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	  Say Y or M if you want to add support for SPDIF driver for
+	  Rockchip SPDIF transceiver device.
+
 config SND_SOC_ROCKCHIP_MAX98090
 	tristate "ASoC support for Rockchip boards using a MAX98090 codec"
 	depends on SND_SOC_ROCKCHIP && I2C && GPIOLIB
@@ -33,3 +41,4 @@ config SND_SOC_ROCKCHIP_RT5645
 	help
 	  Say Y or M here if you want to add support for SoC audio on Rockchip
 	  boards using the RT5645/RT5650 codec, such as Veyron.
+
diff --git a/sound/soc/rockchip/Makefile b/sound/soc/rockchip/Makefile
index 1bc1dc3..b02ab69 100644
--- a/sound/soc/rockchip/Makefile
+++ b/sound/soc/rockchip/Makefile
@@ -1,10 +1,13 @@
 # ROCKCHIP Platform Support
 snd-soc-i2s-objs := rockchip_i2s.o
+snd-soc-spdif-objs := rockchip_spdif.o
 
 obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-i2s.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_SPDIF) += snd-soc-spdif.o
 
 snd-soc-rockchip-max98090-objs := rockchip_max98090.o
 snd-soc-rockchip-rt5645-objs := rockchip_rt5645.o
 
 obj-$(CONFIG_SND_SOC_ROCKCHIP_MAX98090) += snd-soc-rockchip-max98090.o
 obj-$(CONFIG_SND_SOC_ROCKCHIP_RT5645) += snd-soc-rockchip-rt5645.o
+
diff --git a/sound/soc/rockchip/rockchip_spdif.c b/sound/soc/rockchip/rockchip_spdif.c
new file mode 100644
index 0000000..e60ccf6
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_spdif.c
@@ -0,0 +1,375 @@
+/* sound/soc/rockchip/rockchip_spdif.c
+ *
+ * ALSA SoC Audio Layer - Rockchip I2S Controller driver
+ *
+ * Copyright (c) 2014 Rockchip Electronics Co. Ltd.
+ * Author: Jianqun <jay.xu@rock-chips.com>
+ * Copyright (c) 2015 Collabora Ltd.
+ * Author: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/of_gpio.h>
+#include <linux/clk.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "rockchip_spdif.h"
+
+#define DRV_NAME "rockchip-spdif"
+
+struct rk_spdif_dev {
+	struct device *dev;
+
+	struct clk *mclk;
+	struct clk *hclk;
+
+	struct snd_dmaengine_dai_dma_data playback_dma_data;
+
+	struct regmap *regmap;
+};
+
+static int spdif_runtime_suspend(struct device *dev)
+{
+	struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(spdif->mclk);
+
+	return 0;
+}
+
+static int spdif_runtime_resume(struct device *dev)
+{
+	struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(spdif->mclk);
+	if (ret) {
+		dev_err(spdif->dev, "clock enable failed %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static inline struct rk_spdif_dev *to_info(struct snd_soc_dai *dai)
+{
+	return snd_soc_dai_get_drvdata(dai);
+}
+
+static void rockchip_snd_txctrl(struct rk_spdif_dev *spdif, int on)
+{
+	if (on) {
+		regmap_update_bits(spdif->regmap, SPDIF_DMACR,
+				   SPDIF_DMACR_TDE_ENABLE,
+				   SPDIF_DMACR_TDE_ENABLE);
+
+		regmap_update_bits(spdif->regmap, SPDIF_XFER,
+				   SPDIF_XFER_TXS_START,
+				   SPDIF_XFER_TXS_START);
+	} else {
+		regmap_update_bits(spdif->regmap, SPDIF_DMACR,
+				   SPDIF_DMACR_TDE_ENABLE,
+				   SPDIF_DMACR_TDE_DISABLE);
+
+		regmap_update_bits(spdif->regmap, SPDIF_XFER,
+				   SPDIF_XFER_TXS_START,
+				   SPDIF_XFER_TXS_STOP);
+	}
+}
+
+static int rockchip_spdif_hw_params(struct snd_pcm_substream *substream,
+				  struct snd_pcm_hw_params *params,
+				  struct snd_soc_dai *dai)
+{
+	struct rk_spdif_dev *spdif = to_info(dai);
+	unsigned int val = SPDIF_CFGR_HALFWORD_ENABLE;
+	int srate, mclk;
+
+	srate = params_rate(params);
+	switch (srate) {
+	case 32000:
+	case 48000:
+	case 96000:
+		mclk = 12288000;
+		break;
+	case 44100:
+		mclk = 11289600;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		val |= SPDIF_CFGR_VDW_16;
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		val |= SPDIF_CFGR_VDW_20;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		val |= SPDIF_CFGR_VDW_24;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Set clock and calculate divider */
+	clk_set_rate(spdif->mclk, mclk);
+	val |= SPDIF_CFGR_CLK_DIV(mclk/(srate * 256));
+
+	regmap_update_bits(spdif->regmap, SPDIF_CFGR,
+		SPDIF_CFGR_CLK_DIV_MASK | SPDIF_CFGR_HALFWORD_ENABLE |
+		SDPIF_CFGR_VDW_MASK,
+		val);
+
+	return 0;
+}
+
+static int rockchip_spdif_trigger(struct snd_pcm_substream *substream,
+				int cmd, struct snd_soc_dai *dai)
+{
+	struct rk_spdif_dev *spdif = to_info(dai);
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		rockchip_snd_txctrl(spdif, 1);
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		rockchip_snd_txctrl(spdif, 0);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int rockchip_spdif_dai_probe(struct snd_soc_dai *dai)
+{
+	struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
+
+	dai->playback_dma_data = &spdif->playback_dma_data;
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops rockchip_spdif_dai_ops = {
+	.hw_params = rockchip_spdif_hw_params,
+	.trigger = rockchip_spdif_trigger,
+};
+
+static struct snd_soc_dai_driver rockchip_spdif_dai = {
+	.probe = rockchip_spdif_dai_probe,
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = (SNDRV_PCM_RATE_32000 |
+			  SNDRV_PCM_RATE_44100 |
+			  SNDRV_PCM_RATE_48000 |
+			  SNDRV_PCM_RATE_96000),
+		.formats = (SNDRV_PCM_FMTBIT_S16_LE |
+			    SNDRV_PCM_FMTBIT_S20_3LE |
+			    SNDRV_PCM_FMTBIT_S24_LE),
+	},
+	.ops = &rockchip_spdif_dai_ops,
+};
+
+static const struct snd_soc_component_driver rockchip_spdif_component = {
+	.name = DRV_NAME,
+};
+
+static bool rockchip_spdif_wr_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case SPDIF_CFGR:
+	case SPDIF_DMACR:
+	case SPDIF_INTCR:
+	case SPDIF_XFER:
+	case SPDIF_SMPDR:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rockchip_spdif_rd_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case SPDIF_CFGR:
+	case SPDIF_SDBLR:
+	case SPDIF_INTCR:
+	case SPDIF_INTSR:
+	case SPDIF_XFER:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rockchip_spdif_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case SPDIF_INTSR:
+	case SPDIF_SDBLR:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config rockchip_spdif_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = SPDIF_SMPDR,
+	.writeable_reg = rockchip_spdif_wr_reg,
+	.readable_reg = rockchip_spdif_rd_reg,
+	.volatile_reg = rockchip_spdif_volatile_reg,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static int rockchip_spdif_probe(struct platform_device *pdev)
+{
+	struct rk_spdif_dev *spdif;
+	struct resource *res;
+	void __iomem *regs;
+	int ret;
+
+	spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
+	if (!spdif)
+		return -ENOMEM;
+
+	spdif->hclk = devm_clk_get(&pdev->dev, "spdif_hclk");
+	if (IS_ERR(spdif->hclk)) {
+		dev_err(&pdev->dev, "Can't retrieve spdif bus clock\n");
+		return PTR_ERR(spdif->hclk);
+	}
+	ret = clk_prepare_enable(spdif->hclk);
+	if (ret) {
+		dev_err(spdif->dev, "hclock enable failed %d\n", ret);
+		return ret;
+	}
+
+	spdif->mclk = devm_clk_get(&pdev->dev, "spdif_clk");
+	if (IS_ERR(spdif->mclk)) {
+		dev_err(&pdev->dev, "Can't retrieve spdif master clock\n");
+		return PTR_ERR(spdif->hclk);
+	}
+
+	ret = clk_prepare_enable(spdif->mclk);
+	if (ret) {
+		dev_err(spdif->dev, "clock enable failed %d\n", ret);
+		return ret;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+					    &rockchip_spdif_regmap_config);
+	if (IS_ERR(spdif->regmap)) {
+		dev_err(&pdev->dev,
+			"Failed to initialise managed register map\n");
+		return PTR_ERR(spdif->regmap);
+	}
+
+	spdif->playback_dma_data.addr = res->start + SPDIF_SMPDR;
+	spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	spdif->playback_dma_data.maxburst = 4;
+
+	spdif->dev = &pdev->dev;
+	dev_set_drvdata(&pdev->dev, spdif);
+
+	pm_runtime_enable(&pdev->dev);
+	if (!pm_runtime_enabled(&pdev->dev)) {
+		ret = spdif_runtime_resume(&pdev->dev);
+		if (ret)
+			goto err_pm_disable;
+	}
+
+	ret = devm_snd_soc_register_component(&pdev->dev,
+					      &rockchip_spdif_component,
+					      &rockchip_spdif_dai, 1);
+	if (ret) {
+		dev_err(&pdev->dev, "Could not register DAI\n");
+		goto err_suspend;
+	}
+
+	ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+	if (ret) {
+		dev_err(&pdev->dev, "Could not register PCM\n");
+		goto err_pcm_register;
+	}
+
+	return 0;
+
+err_pcm_register:
+	snd_dmaengine_pcm_unregister(&pdev->dev);
+err_suspend:
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		spdif_runtime_suspend(&pdev->dev);
+err_pm_disable:
+	pm_runtime_disable(&pdev->dev);
+
+	return ret;
+}
+
+static int rockchip_spdif_remove(struct platform_device *pdev)
+{
+	struct rk_spdif_dev *spdif = dev_get_drvdata(&pdev->dev);
+
+	pm_runtime_disable(&pdev->dev);
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		spdif_runtime_suspend(&pdev->dev);
+
+	clk_disable_unprepare(spdif->mclk);
+	clk_disable_unprepare(spdif->hclk);
+	snd_dmaengine_pcm_unregister(&pdev->dev);
+	snd_soc_unregister_component(&pdev->dev);
+
+	return 0;
+}
+
+static const struct of_device_id rockchip_spdif_match[] = {
+	{ .compatible = "rockchip,rk3066-spdif", },
+	{},
+};
+
+static const struct dev_pm_ops rockchip_spdif_pm_ops = {
+	SET_RUNTIME_PM_OPS(spdif_runtime_suspend, spdif_runtime_resume,
+			   NULL)
+};
+
+static struct platform_driver rockchip_spdif_driver = {
+	.probe = rockchip_spdif_probe,
+	.remove = rockchip_spdif_remove,
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = of_match_ptr(rockchip_spdif_match),
+		.pm = &rockchip_spdif_pm_ops,
+	},
+};
+module_platform_driver(rockchip_spdif_driver);
+
+MODULE_DESCRIPTION("ROCKCHIP SPDIF transceiver Interface");
+MODULE_AUTHOR("Sjoerd Simons <sjoerd.simons@collabora.co.uk>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, rockchip_spdif_match);
diff --git a/sound/soc/rockchip/rockchip_spdif.h b/sound/soc/rockchip/rockchip_spdif.h
new file mode 100644
index 0000000..07f86a2
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_spdif.h
@@ -0,0 +1,63 @@
+/*
+ * ALSA SoC Audio Layer - Rockchip SPDIF transceiver driver
+ *
+ * Copyright (c) 2015 Collabora Ltd.
+ * Author: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ROCKCHIP_SPDIF_H
+#define _ROCKCHIP_SPDIF_H
+
+/*
+ * CFGR
+ * transfer configuration register
+*/
+#define SPDIF_CFGR_CLK_DIV_SHIFT	(16)
+#define SPDIF_CFGR_CLK_DIV_MASK		(0xff << SPDIF_CFGR_CLK_DIV_SHIFT)
+#define SPDIF_CFGR_CLK_DIV(x)		(x << SPDIF_CFGR_CLK_DIV_SHIFT)
+
+#define SPDIF_CFGR_HALFWORD_SHIFT	2
+#define SPDIF_CFGR_HALFWORD_DISABLE	(0 << SPDIF_CFGR_HALFWORD_SHIFT)
+#define SPDIF_CFGR_HALFWORD_ENABLE	(1 << SPDIF_CFGR_HALFWORD_SHIFT)
+
+#define SPDIF_CFGR_VDW_SHIFT	0
+#define SPDIF_CFGR_VDW(x)	(x << SPDIF_CFGR_VDW_SHIFT)
+#define SDPIF_CFGR_VDW_MASK	(0xf << SPDIF_CFGR_VDW_SHIFT)
+
+#define SPDIF_CFGR_VDW_16	SPDIF_CFGR_VDW(0x00)
+#define SPDIF_CFGR_VDW_20	SPDIF_CFGR_VDW(0x01)
+#define SPDIF_CFGR_VDW_24	SPDIF_CFGR_VDW(0x10)
+
+/*
+ * DMACR
+ * DMA control register
+*/
+#define SPDIF_DMACR_TDE_SHIFT	5
+#define SPDIF_DMACR_TDE_DISABLE	(0 << SPDIF_DMACR_TDE_SHIFT)
+#define SPDIF_DMACR_TDE_ENABLE	(1 << SPDIF_DMACR_TDE_SHIFT)
+
+#define SPDIF_DMACR_TDL_SHIFT	0
+#define SPDIF_DMACR_TDL(x)	((x) << SPDIF_DMACR_TDL_SHIFT)
+#define SPDIF_DMACR_TDL_MASK	(0x1f << SDPIF_DMACR_TDL_SHIFT)
+
+/*
+ * XFER
+ * Transfer control register
+*/
+#define SPDIF_XFER_TXS_SHIFT	0
+#define SPDIF_XFER_TXS_STOP	(0 << SPDIF_XFER_TXS_SHIFT)
+#define SPDIF_XFER_TXS_START	(1 << SPDIF_XFER_TXS_SHIFT)
+
+#define SPDIF_CFGR	(0x0000)
+#define SPDIF_SDBLR	(0x0004)
+#define SPDIF_DMACR	(0x0008)
+#define SPDIF_INTCR	(0x000c)
+#define SPDIF_INTSR	(0x0010)
+#define SPDIF_XFER	(0x0018)
+#define SPDIF_SMPDR	(0x0020)
+
+#endif /* _ROCKCHIP_SPDIF_H */
-- 
2.4.6

[PATCH 2/4] ASoc: rockchip: Add rockchip SPDIF transceiver driver

[Heiko Stübner]

Hi,

could you streamline the prefixes a bit perhaps? I.e. so far I've seen

rk_spdif_dev
spdif_runtime_suspend
rockchip_snd_txctrl
rockchip_spdif_hw_params

I guess rockchip_spdif_* or rk_spdif_* for everything might make this a bit 
nicer


Am Dienstag, 28. Juli 2015, 14:03:29 schrieb Sjoerd Simons:
> Add a driver for the SDPIF transceiver available on RK3066, RK3188 and
> RK3288. Heavily based on the rockchip i2s driver.
> 
> Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
> ---
>  sound/soc/rockchip/Kconfig          |   9 +
>  sound/soc/rockchip/Makefile         |   3 +
>  sound/soc/rockchip/rockchip_spdif.c | 375
> ++++++++++++++++++++++++++++++++++++ sound/soc/rockchip/rockchip_spdif.h | 
> 63 ++++++
>  4 files changed, 450 insertions(+)
>  create mode 100644 sound/soc/rockchip/rockchip_spdif.c
>  create mode 100644 sound/soc/rockchip/rockchip_spdif.h
> 
> diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig
> index 58bae8e..20bc676 100644
> --- a/sound/soc/rockchip/Kconfig
> +++ b/sound/soc/rockchip/Kconfig
> @@ -15,6 +15,14 @@ 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_SPDIF
> +	tristate "Rockchip SPDIF Device Driver"
> +	depends on CLKDEV_LOOKUP && SND_SOC_ROCKCHIP
> +	select SND_SOC_GENERIC_DMAENGINE_PCM
> +	help
> +	  Say Y or M if you want to add support for SPDIF driver for
> +	  Rockchip SPDIF transceiver device.
> +
>  config SND_SOC_ROCKCHIP_MAX98090
>  	tristate "ASoC support for Rockchip boards using a MAX98090 codec"
>  	depends on SND_SOC_ROCKCHIP && I2C && GPIOLIB
> @@ -33,3 +41,4 @@ config SND_SOC_ROCKCHIP_RT5645
>  	help
>  	  Say Y or M here if you want to add support for SoC audio on Rockchip
>  	  boards using the RT5645/RT5650 codec, such as Veyron.
> +

unrelated newline

> diff --git a/sound/soc/rockchip/Makefile b/sound/soc/rockchip/Makefile
> index 1bc1dc3..b02ab69 100644
> --- a/sound/soc/rockchip/Makefile
> +++ b/sound/soc/rockchip/Makefile
> @@ -1,10 +1,13 @@
>  # ROCKCHIP Platform Support
>  snd-soc-i2s-objs := rockchip_i2s.o
> +snd-soc-spdif-objs := rockchip_spdif.o
> 
>  obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-i2s.o
> +obj-$(CONFIG_SND_SOC_ROCKCHIP_SPDIF) += snd-soc-spdif.o
> 
>  snd-soc-rockchip-max98090-objs := rockchip_max98090.o
>  snd-soc-rockchip-rt5645-objs := rockchip_rt5645.o
> 
>  obj-$(CONFIG_SND_SOC_ROCKCHIP_MAX98090) += snd-soc-rockchip-max98090.o
>  obj-$(CONFIG_SND_SOC_ROCKCHIP_RT5645) += snd-soc-rockchip-rt5645.o
> +
> diff --git a/sound/soc/rockchip/rockchip_spdif.c
> b/sound/soc/rockchip/rockchip_spdif.c new file mode 100644
> index 0000000..e60ccf6
> --- /dev/null
> +++ b/sound/soc/rockchip/rockchip_spdif.c
> @@ -0,0 +1,375 @@
> +/* sound/soc/rockchip/rockchip_spdif.c
> + *
> + * ALSA SoC Audio Layer - Rockchip I2S Controller driver
								^spdif

> + *
> + * Copyright (c) 2014 Rockchip Electronics Co. Ltd.
> + * Author: Jianqun <jay.xu@rock-chips.com>
> + * Copyright (c) 2015 Collabora Ltd.
> + * Author: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/delay.h>
> +#include <linux/of_gpio.h>
> +#include <linux/clk.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <sound/pcm_params.h>
> +#include <sound/dmaengine_pcm.h>
> +
> +#include "rockchip_spdif.h"
> +
> +#define DRV_NAME "rockchip-spdif"
> +
> +struct rk_spdif_dev {
> +	struct device *dev;
> +
> +	struct clk *mclk;
> +	struct clk *hclk;
> +
> +	struct snd_dmaengine_dai_dma_data playback_dma_data;
> +
> +	struct regmap *regmap;
> +};
> +
> +static int spdif_runtime_suspend(struct device *dev)
> +{
> +	struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
> +
> +	clk_disable_unprepare(spdif->mclk);
> +
> +	return 0;
> +}
> +
> +static int spdif_runtime_resume(struct device *dev)
> +{
> +	struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
> +	int ret;
> +
> +	ret = clk_prepare_enable(spdif->mclk);
> +	if (ret) {
> +		dev_err(spdif->dev, "clock enable failed %d\n", ret);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static inline struct rk_spdif_dev *to_info(struct snd_soc_dai *dai)
> +{
> +	return snd_soc_dai_get_drvdata(dai);
> +}
> +
> +static void rockchip_snd_txctrl(struct rk_spdif_dev *spdif, int on)
> +{
> +	if (on) {
> +		regmap_update_bits(spdif->regmap, SPDIF_DMACR,
> +				   SPDIF_DMACR_TDE_ENABLE,
> +				   SPDIF_DMACR_TDE_ENABLE);
> +
> +		regmap_update_bits(spdif->regmap, SPDIF_XFER,
> +				   SPDIF_XFER_TXS_START,
> +				   SPDIF_XFER_TXS_START);

personally I'm always unsure of regmap return values. While the underlying 
method is mmio in this case, regmap_* in theory still has the possibility to 
return errors, so I'm not sure if it's ok to silently ignore them.

Here it would simply mean return the error and also return it in 
rockchip_spdif_trigger below.


Heiko

[PATCH 2/4] ASoc: rockchip: Add rockchip SPDIF transceiver driver

[Sjoerd Simons]

On Tue, 2015-07-28 at 16:28 +0200, Heiko St?bner wrote:
> Hi,
> 
> could you streamline the prefixes a bit perhaps? I.e. so far I've 
> seen
> 
> rk_spdif_dev
> spdif_runtime_suspend
> rockchip_snd_txctrl
> rockchip_spdif_hw_params
> 
> I guess rockchip_spdif_* or rk_spdif_* for everything might make this 
> a bit 
> nicer

Will do in V2, i probalby copied a few too many warts from the i2s
driver ;)

Thanks for the review!


> Am Dienstag, 28. Juli 2015, 14:03:29 schrieb Sjoerd Simons:
> > Add a driver for the SDPIF transceiver available on RK3066, RK3188 
> > and
> > RK3288. Heavily based on the rockchip i2s driver.
> > 
> > Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
> > ---
> >  sound/soc/rockchip/Kconfig          |   9 +
> >  sound/soc/rockchip/Makefile         |   3 +
> >  sound/soc/rockchip/rockchip_spdif.c | 375
> > ++++++++++++++++++++++++++++++++++++ 
> > sound/soc/rockchip/rockchip_spdif.h | 
> > 63 ++++++
> >  4 files changed, 450 insertions(+)
> >  create mode 100644 sound/soc/rockchip/rockchip_spdif.c
> >  create mode 100644 sound/soc/rockchip/rockchip_spdif.h
> > 
> > diff --git a/sound/soc/rockchip/Kconfig 
> > b/sound/soc/rockchip/Kconfig
> > index 58bae8e..20bc676 100644
> > --- a/sound/soc/rockchip/Kconfig
> > +++ b/sound/soc/rockchip/Kconfig
> > @@ -15,6 +15,14 @@ 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_SPDIF
> > +	tristate "Rockchip SPDIF Device Driver"
> > +	depends on CLKDEV_LOOKUP && SND_SOC_ROCKCHIP
> > +	select SND_SOC_GENERIC_DMAENGINE_PCM
> > +	help
> > +	  Say Y or M if you want to add support for SPDIF driver 
> > for
> > +	  Rockchip SPDIF transceiver device.
> > +
> >  config SND_SOC_ROCKCHIP_MAX98090
> >  	tristate "ASoC support for Rockchip boards using a 
> > MAX98090 codec"
> >  	depends on SND_SOC_ROCKCHIP && I2C && GPIOLIB
> > @@ -33,3 +41,4 @@ config SND_SOC_ROCKCHIP_RT5645
> >  	help
> >  	  Say Y or M here if you want to add support for SoC audio 
> > on Rockchip
> >  	  boards using the RT5645/RT5650 codec, such as Veyron.
> > +
> 
> unrelated newline
> 
> > diff --git a/sound/soc/rockchip/Makefile 
> > b/sound/soc/rockchip/Makefile
> > index 1bc1dc3..b02ab69 100644
> > --- a/sound/soc/rockchip/Makefile
> > +++ b/sound/soc/rockchip/Makefile
> > @@ -1,10 +1,13 @@
> >  # ROCKCHIP Platform Support
> >  snd-soc-i2s-objs := rockchip_i2s.o
> > +snd-soc-spdif-objs := rockchip_spdif.o
> > 
> >  obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-i2s.o
> > +obj-$(CONFIG_SND_SOC_ROCKCHIP_SPDIF) += snd-soc-spdif.o
> > 
> >  snd-soc-rockchip-max98090-objs := rockchip_max98090.o
> >  snd-soc-rockchip-rt5645-objs := rockchip_rt5645.o
> > 
> >  obj-$(CONFIG_SND_SOC_ROCKCHIP_MAX98090) += snd-soc-rockchip
> > -max98090.o
> >  obj-$(CONFIG_SND_SOC_ROCKCHIP_RT5645) += snd-soc-rockchip-rt5645.o
> > +
> > diff --git a/sound/soc/rockchip/rockchip_spdif.c
> > b/sound/soc/rockchip/rockchip_spdif.c new file mode 100644
> > index 0000000..e60ccf6
> > --- /dev/null
> > +++ b/sound/soc/rockchip/rockchip_spdif.c
> > @@ -0,0 +1,375 @@
> > +/* sound/soc/rockchip/rockchip_spdif.c
> > + *
> > + * ALSA SoC Audio Layer - Rockchip I2S Controller driver
> 								^spd
> if
> 
> > + *
> > + * Copyright (c) 2014 Rockchip Electronics Co. Ltd.
> > + * Author: Jianqun <jay.xu@rock-chips.com>
> > + * Copyright (c) 2015 Collabora Ltd.
> > + * Author: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
> > + *
> > + * This program is free software; you can redistribute it and/or 
> > modify
> > + * it under the terms of the GNU General Public License version 2 
> > as
> > + * published by the Free Software Foundation.
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/delay.h>
> > +#include <linux/of_gpio.h>
> > +#include <linux/clk.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/regmap.h>
> > +#include <sound/pcm_params.h>
> > +#include <sound/dmaengine_pcm.h>
> > +
> > +#include "rockchip_spdif.h"
> > +
> > +#define DRV_NAME "rockchip-spdif"
> > +
> > +struct rk_spdif_dev {
> > +	struct device *dev;
> > +
> > +	struct clk *mclk;
> > +	struct clk *hclk;
> > +
> > +	struct snd_dmaengine_dai_dma_data playback_dma_data;
> > +
> > +	struct regmap *regmap;
> > +};
> > +
> > +static int spdif_runtime_suspend(struct device *dev)
> > +{
> > +	struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
> > +
> > +	clk_disable_unprepare(spdif->mclk);
> > +
> > +	return 0;
> > +}
> > +
> > +static int spdif_runtime_resume(struct device *dev)
> > +{
> > +	struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
> > +	int ret;
> > +
> > +	ret = clk_prepare_enable(spdif->mclk);
> > +	if (ret) {
> > +		dev_err(spdif->dev, "clock enable failed %d\n", 
> > ret);
> > +		return ret;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static inline struct rk_spdif_dev *to_info(struct snd_soc_dai 
> > *dai)
> > +{
> > +	return snd_soc_dai_get_drvdata(dai);
> > +}
> > +
> > +static void rockchip_snd_txctrl(struct rk_spdif_dev *spdif, int 
> > on)
> > +{
> > +	if (on) {
> > +		regmap_update_bits(spdif->regmap, SPDIF_DMACR,
> > +				   SPDIF_DMACR_TDE_ENABLE,
> > +				   SPDIF_DMACR_TDE_ENABLE);
> > +
> > +		regmap_update_bits(spdif->regmap, SPDIF_XFER,
> > +				   SPDIF_XFER_TXS_START,
> > +				   SPDIF_XFER_TXS_START);
> 
> personally I'm always unsure of regmap return values. While the 
> underlying 
> method is mmio in this case, regmap_* in theory still has the 
> possibility to 
> return errors, so I'm not sure if it's ok to silently ignore them.
> 
> Here it would simply mean return the error and also return it in 
> rockchip_spdif_trigger below.
> 
> 
> Heiko

-- 
Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Collabora Ltd.

[PATCH 2/4] ASoc: rockchip: Add rockchip SPDIF transceiver driver

[Paul Bolle]

A nit and a question.

On di, 2015-07-28 at 14:03 +0200, Sjoerd Simons wrote:
> --- /dev/null
> +++ b/sound/soc/rockchip/rockchip_spdif.c

> +#define DRV_NAME "rockchip-spdif"

> +static const struct of_device_id rockchip_spdif_match[] = {
> +	{ .compatible = "rockchip,rk3066-spdif", },
> +	{},
> +};

I didn't spot
    MODULE_DEVICE_TABLE(of, rockchip_spdif_match);

at first. It turned out that that line can be found at the bottom of
this file. Please put it here.

> +static struct platform_driver rockchip_spdif_driver = {
> +	.probe = rockchip_spdif_probe,
> +	.remove = rockchip_spdif_remove,
> +	.driver = {
> +		.name = DRV_NAME,
> +		.of_match_table = of_match_ptr(rockchip_spdif_match),
> +		.pm = &rockchip_spdif_pm_ops,
> +	},
> +};
> +module_platform_driver(rockchip_spdif_driver);

> +MODULE_ALIAS("platform:" DRV_NAME);

(I seem to remember that Mark Brown is OK with this, at least for the
time being, but for future reference I'll ask the question anyway.) Is
there a corresponding struct platform_device with a "rockchip-spdif"
.name? Because if there's no such platform_device I think this line
doesn't really do anything for this driver.

> +MODULE_DEVICE_TABLE(of, rockchip_spdif_match);

Thanks,


Paul Bolle

[PATCH 2/4] ASoc: rockchip: Add rockchip SPDIF transceiver driver

[Mark Brown]

On Wed, Jul 29, 2015 at 10:51:48AM +0200, Paul Bolle wrote:

> > +		.name = DRV_NAME,
> > +		.of_match_table = of_match_ptr(rockchip_spdif_match),
> > +		.pm = &rockchip_spdif_pm_ops,
> > +	},
> > +};
> > +module_platform_driver(rockchip_spdif_driver);

> > +MODULE_ALIAS("platform:" DRV_NAME);

> (I seem to remember that Mark Brown is OK with this, at least for the
> time being, but for future reference I'll ask the question anyway.) Is
> there a corresponding struct platform_device with a "rockchip-spdif"
> .name? Because if there's no such platform_device I think this line
> doesn't really do anything for this driver.

Paul, you've been told this before but please stop providing these
review comments.  It has been explained to you repeatedly that we do not
require any form of machine definition to be merged to merge a driver,
please pay attention to those explanations and stop sending the same
bogus feedback to patch submitters.  This just creates confusion for the
submitters and wastes everyone's time.  

If you have questions the way to raise them is to respond to the
original discussions, not to send new replies to other submitters
repeating the same feedback you were previously advised was incorrect.
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[PATCH 3/4] ARM: dts: rockchip: Add SPDIF transceiver for RK3188

[Sjoerd Simons]

Add the SPDIF transceiver controller and pin for RK3188

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
---
 arch/arm/boot/dts/rk3188.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
index 0f23aed..43e9bdf 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi
@@ -121,6 +121,22 @@
 		status = "disabled";
 	};
 
+	spdif: spdif at 0x1011e000 {
+		compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";
+		reg = <0x1011e000 0x2000>;
+		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&spdif_tx>;
+		dmas = <&dmac1_s 8>;
+		dma-names = "tx";
+		clock-names = "spdif_hclk", "spdif_clk";
+		clocks = <&cru HCLK_SPDIF>, <&cru SCLK_SPDIF>;
+		status = "disabled";
+		#sound-dai-cells = <0>;
+	};
+
 	cru: clock-controller at 20000000 {
 		compatible = "rockchip,rk3188-cru";
 		reg = <0x20000000 0x1000>;
@@ -462,6 +478,12 @@
 						<RK_GPIO1 21 RK_FUNC_1 &pcfg_pull_none>;
 			};
 		};
+
+		spdif {
+			spdif_tx: spdif-tx {
+				rockchip,pins = <RK_GPIO1 14 RK_FUNC_1 &pcfg_pull_none>;
+			};
+		};
 	};
 };
 
-- 
2.4.6

[PATCH 3/4] ARM: dts: rockchip: Add SPDIF transceiver for RK3188

[Sergei Shtylyov]

Hello.

On 7/28/2015 3:03 PM, Sjoerd Simons wrote:

> Add the SPDIF transceiver controller and pin for RK3188

> Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
> ---
>   arch/arm/boot/dts/rk3188.dtsi | 22 ++++++++++++++++++++++
>   1 file changed, 22 insertions(+)

> diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
> index 0f23aed..43e9bdf 100644
> --- a/arch/arm/boot/dts/rk3188.dtsi
> +++ b/arch/arm/boot/dts/rk3188.dtsi
> @@ -121,6 +121,22 @@
>   		status = "disabled";
>   	};
>
> +	spdif: spdif at 0x1011e000 {

    Please drop "0x". And I'd call the node "sound at ..." to match the ePAPR 
standard.

[...]

MBR, Sergei

[PATCH 3/4] ARM: dts: rockchip: Add SPDIF transceiver for RK3188

[Heiko Stübner]

Hi,

Am Dienstag, 28. Juli 2015, 14:03:30 schrieb Sjoerd Simons:
> Add the SPDIF transceiver controller and pin for RK3188
> 
> Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
> ---
>  arch/arm/boot/dts/rk3188.dtsi | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
> index 0f23aed..43e9bdf 100644
> --- a/arch/arm/boot/dts/rk3188.dtsi
> +++ b/arch/arm/boot/dts/rk3188.dtsi
> @@ -121,6 +121,22 @@
>  		status = "disabled";
>  	};
> 
> +	spdif: spdif at 0x1011e000 {

node names without 0x -> "spdif at 1011e000"


> +		compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";
> +		reg = <0x1011e000 0x2000>;
> +		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&spdif_tx>;
> +		dmas = <&dmac1_s 8>;
> +		dma-names = "tx";
> +		clock-names = "spdif_hclk", "spdif_clk";
> +		clocks = <&cru HCLK_SPDIF>, <&cru SCLK_SPDIF>;
> +		status = "disabled";
> +		#sound-dai-cells = <0>;

if you're submitting a v2, could you try ordering stuff like this?

+		compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";
+		reg = <0x1011e000 0x2000>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		#sound-dai-cells = <0>;
+		clock-names = "spdif_hclk", "spdif_clk";
+		clocks = <&cru HCLK_SPDIF>, <&cru SCLK_SPDIF>;
+		dmas = <&dmac1_s 8>;
+		dma-names = "tx";
+		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&spdif_tx>;
+		status = "disabled";

The ordering I try to keep is "compatible", "reg", [everything else sorted 
alphabetically], "status"

> +	};
> +
>  	cru: clock-controller at 20000000 {
>  		compatible = "rockchip,rk3188-cru";
>  		reg = <0x20000000 0x1000>;
> @@ -462,6 +478,12 @@
>  						<RK_GPIO1 21 RK_FUNC_1 &pcfg_pull_none>;
>  			};
>  		};
> +
> +		spdif {
> +			spdif_tx: spdif-tx {
> +				rockchip,pins = <RK_GPIO1 14 RK_FUNC_1 &pcfg_pull_none>;
> +			};
> +		};
>  	};
>  };

[PATCH 4/4] ARM: dts: rockchip: Add SPDIF optical out on Radxa Rock

[Sjoerd Simons]

This enables the SPDIF optical audio output on the Radxa Rock

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
---
 arch/arm/boot/dts/rk3188-radxarock.dts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm/boot/dts/rk3188-radxarock.dts b/arch/arm/boot/dts/rk3188-radxarock.dts
index 4bb014d..dea020c 100644
--- a/arch/arm/boot/dts/rk3188-radxarock.dts
+++ b/arch/arm/boot/dts/rk3188-radxarock.dts
@@ -90,6 +90,21 @@
 		};
 	};
 
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "SPDIF";
+
+		simple-audio-card,dai-link at 1 {  /* S/PDIF - S/PDIF */
+			cpu { sound-dai = <&spdif>; };
+			codec { sound-dai = <&spdif_out>; };
+		};
+	};
+
+	spdif_out: spdif-out {
+		compatible = "linux,spdif-dit";
+		#sound-dai-cells = <0>;
+	};
+
 	ir_recv: gpio-ir-receiver {
 		compatible = "gpio-ir-receiver";
 		gpios = <&gpio0 10 1>;
@@ -343,6 +358,10 @@
 	};
 };
 
+&spdif {
+	status = "okay";
+};
+
 &uart0 {
 	status = "okay";
 };
-- 
2.4.6