[PATCH 0/9] Beaglebone-Black HDMI audio

[PATCH 0/9] Beaglebone-Black HDMI audio

[Jyri Sarha]

The code has a functional dependency to:
http://www.mail-archive.com/linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg108199.html

Without the above patch the audio card does not probe.

The code has been rebased on top of Linux 3.16 merged with 
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
with http://www.mail-archive.com/linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg108199.html
cherry-picked on top.

All patches have gone trough some cleaning up since the RFC version of
these patches over half a year ago.

Jyri Sarha (9):
  ASoC: mcasp: Fix implicit BLCK divider setting
  clk: add gpio controlled clock
  drm/tilcdc: Add I2S HDMI audio config for tda998x
  ASoC: davinci-evm: HDMI audio support for TDA998x trough McASP I2S
    bus
  ASoC: davinci: HDMI audio build for AM33XX and TDA998x
  ARM: dts: am33xx: Add external clock provider
  ARM: dts: am335x-boneblack: Add HDMI audio support
  ARM: OMAP2+: omap2plus_defconfig: TDA998X HDMI trough tilcdc,slave
  ARM: OMAP2+: omap2plus_defconfig: Enable BeagleBone Black HDMI audio
    support

 .../devicetree/bindings/clock/gpio-clock.txt       |   21 ++
 .../bindings/sound/davinci-evm-audio.txt           |    4 +-
 arch/arm/boot/dts/am335x-boneblack.dts             |   54 +++++
 arch/arm/boot/dts/am33xx.dtsi                      |   10 +
 arch/arm/configs/omap2plus_defconfig               |    5 +
 drivers/clk/Makefile                               |    1 +
 drivers/clk/clk-gpio.c                             |  206 ++++++++++++++++++++
 drivers/gpu/drm/tilcdc/tilcdc_slave.c              |   24 ++-
 include/linux/clk-provider.h                       |   23 +++
 sound/soc/davinci/Kconfig                          |   12 ++
 sound/soc/davinci/davinci-evm.c                    |   82 +++++++-
 sound/soc/davinci/davinci-mcasp.c                  |   14 +-
 12 files changed, 449 insertions(+), 7 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/gpio-clock.txt
 create mode 100644 drivers/clk/clk-gpio.c

-- 
1.7.9.5

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[PATCH 1/9] ASoC: mcasp: Fix implicit BLCK divider setting

[Jyri Sarha]

The implicit BLCK divider setting was broken by "ASoC: mcasp: don't
override bclk divider if it was provided by the machine"-patch. After
the BCLK divider is implicitly set for the first time the
mcasp->bclk_div gets a non zero value and the implicit setting is
"turned off".

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 sound/soc/davinci/davinci-mcasp.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index c28508d..6a6b2ff 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -403,7 +403,8 @@ out:
 	return ret;
 }
 
-static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
+static int __davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
+				      int div, bool explicit)
 {
 	struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
 
@@ -420,7 +421,8 @@ static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div
 			       ACLKXDIV(div - 1), ACLKXDIV_MASK);
 		mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
 			       ACLKRDIV(div - 1), ACLKRDIV_MASK);
-		mcasp->bclk_div = div;
+		if (explicit)
+			mcasp->bclk_div = div;
 		break;
 
 	case 2:		/* BCLK/LRCLK ratio */
@@ -434,6 +436,12 @@ static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div
 	return 0;
 }
 
+static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
+				    int div)
+{
+	return __davinci_mcasp_set_clkdiv(dai, div_id, div, 1);
+}
+
 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 				    unsigned int freq, int dir)
 {
@@ -738,7 +746,7 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
 				 "Inaccurate BCLK: %u Hz / %u != %u Hz\n",
 				 mcasp->sysclk_freq, div, bclk_freq);
 		}
-		davinci_mcasp_set_clkdiv(cpu_dai, 1, div);
+		__davinci_mcasp_set_clkdiv(cpu_dai, 1, div, 0);
 	}
 
 	ret = mcasp_common_hw_param(mcasp, substream->stream,
-- 
1.7.9.5

Re: [PATCH 1/9] ASoC: mcasp: Fix implicit BLCK divider setting

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 364 bytes --]

On Wed, Aug 06, 2014 at 04:47:16PM +0300, Jyri Sarha wrote:
> The implicit BLCK divider setting was broken by "ASoC: mcasp: don't
> override bclk divider if it was provided by the machine"-patch. After
> the BCLK divider is implicitly set for the first time the
> mcasp->bclk_div gets a non zero value and the implicit setting is
> "turned off".

Applied, thanks.

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

[PATCH 2/9] clk: add gpio controlled clock

[Jyri Sarha]

The added clk-gpio is a basic clock that can be enabled and disabled
trough a gpio output. The DT binding document for the clock is also
added. For EPROBE_DEFER handling the registering of the clock has to
be delayed until of_clk_get() call time.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 .../devicetree/bindings/clock/gpio-clock.txt       |   21 ++
 drivers/clk/Makefile                               |    1 +
 drivers/clk/clk-gpio.c                             |  206 ++++++++++++++++++++
 include/linux/clk-provider.h                       |   23 +++
 4 files changed, 251 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/gpio-clock.txt
 create mode 100644 drivers/clk/clk-gpio.c

diff --git a/Documentation/devicetree/bindings/clock/gpio-clock.txt b/Documentation/devicetree/bindings/clock/gpio-clock.txt
new file mode 100644
index 0000000..54fea39
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/gpio-clock.txt
@@ -0,0 +1,21 @@
+Binding for simple gpio controlled clock.
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : shall be "gpio-clock".
+- #clock-cells : from common clock binding; shall be set to 0.
+- enable-gpios : GPIO reference for enabling and disabling the clock.
+
+Optional properties:
+- clocks: Maximum of one parent clock is supported.
+
+Example:
+	clock {
+		compatible = "gpio-clock";
+		clocks = <&parentclk>;
+		#clock-cells = <0>;
+		enable-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+	};
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 567f102..bde8fdf 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_COMMON_CLK)	+= clk-gate.o
 obj-$(CONFIG_COMMON_CLK)	+= clk-mux.o
 obj-$(CONFIG_COMMON_CLK)	+= clk-composite.o
 obj-$(CONFIG_COMMON_CLK)	+= clk-fractional-divider.o
+obj-$(CONFIG_COMMON_CLK)	+= clk-gpio.o
 
 # hardware specific clock types
 # please keep this section sorted lexicographically by file/directory path name
diff --git a/drivers/clk/clk-gpio.c b/drivers/clk/clk-gpio.c
new file mode 100644
index 0000000..1eff97c
--- /dev/null
+++ b/drivers/clk/clk-gpio.c
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2012 - 2014 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Jyri Sarha <jsarha@ti.com>
+ *
+ * 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.
+ *
+ * Gpio controlled clock implementation
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/err.h>
+#include <linux/device.h>
+
+/**
+ * DOC: basic gpio controlled clock which can be enabled and disabled
+ *      with gpio output
+ * Traits of this clock:
+ * prepare - clk_(un)prepare only ensures parent is (un)prepared
+ * enable - clk_enable and clk_disable are functional & control gpio
+ * rate - inherits rate from parent.  No clk_set_rate support
+ * parent - fixed parent.  No clk_set_parent support
+ */
+
+#define to_clk_gpio(_hw) container_of(_hw, struct clk_gpio, hw)
+
+static int clk_gpio_enable(struct clk_hw *hw)
+{
+	struct clk_gpio *clk = to_clk_gpio(hw);
+
+	gpiod_set_value(clk->gpiod, 1);
+
+	return 0;
+}
+
+static void clk_gpio_disable(struct clk_hw *hw)
+{
+	struct clk_gpio *clk = to_clk_gpio(hw);
+
+	gpiod_set_value(clk->gpiod, 0);
+}
+
+static int clk_gpio_is_enabled(struct clk_hw *hw)
+{
+	struct clk_gpio *clk = to_clk_gpio(hw);
+
+	return gpiod_get_value(clk->gpiod);
+}
+
+const struct clk_ops clk_gpio_ops = {
+	.enable = clk_gpio_enable,
+	.disable = clk_gpio_disable,
+	.is_enabled = clk_gpio_is_enabled,
+};
+EXPORT_SYMBOL_GPL(clk_gpio_ops);
+
+/**
+ * clk_register_gpio - register a gpip clock with the clock framework
+ * @dev: device that is registering this clock
+ * @name: name of this clock
+ * @parent_name: name of this clock's parent
+ * @gpiod: gpio descriptor to control this clock
+ */
+struct clk *clk_register_gpio(struct device *dev, const char *name,
+		const char *parent_name, struct gpio_desc *gpiod,
+		unsigned long flags)
+{
+	struct clk_gpio *clk_gpio = NULL;
+	struct clk *clk = ERR_PTR(-EINVAL);
+	struct clk_init_data init = { NULL };
+	unsigned long gpio_flags;
+	int err;
+
+	if (gpiod_is_active_low(gpiod))
+		gpio_flags = GPIOF_OUT_INIT_HIGH;
+	else
+		gpio_flags = GPIOF_OUT_INIT_LOW;
+
+	if (dev)
+		err = devm_gpio_request_one(dev, desc_to_gpio(gpiod),
+					    gpio_flags, name);
+	else
+		err = gpio_request_one(desc_to_gpio(gpiod), gpio_flags, name);
+
+	if (err) {
+		pr_err("%s: %s: Error requesting clock control gpio %u\n",
+		       __func__, name, desc_to_gpio(gpiod));
+		return ERR_PTR(err);
+	}
+
+	if (dev)
+		clk_gpio = devm_kzalloc(dev, sizeof(struct clk_gpio),
+					GFP_KERNEL);
+	else
+		clk_gpio = kzalloc(sizeof(struct clk_gpio), GFP_KERNEL);
+
+	if (!clk_gpio) {
+		pr_err("%s: %s: could not allocate gpio clk\n", __func__, name);
+		clk = ERR_PTR(-ENOMEM);
+		goto clk_register_gpio_err;
+	}
+
+	init.name = name;
+	init.ops = &clk_gpio_ops;
+	init.flags = flags | CLK_IS_BASIC;
+	init.parent_names = (parent_name ? &parent_name : NULL);
+	init.num_parents = (parent_name ? 1 : 0);
+
+	clk_gpio->gpiod = gpiod;
+	clk_gpio->hw.init = &init;
+
+	clk = clk_register(dev, &clk_gpio->hw);
+
+	if (!IS_ERR(clk))
+		return clk;
+
+	if (!dev)
+		kfree(clk_gpio);
+
+clk_register_gpio_err:
+	gpiod_put(gpiod);
+
+	return clk;
+}
+EXPORT_SYMBOL_GPL(clk_register_gpio);
+
+#ifdef CONFIG_OF
+/**
+ * The clk_register_gpio has to be delayed, because the EPROBE_DEFER
+ * can not be handled properly at of_clk_init() call time.
+ */
+
+struct clk_gpio_delayed_register_data {
+	struct device_node *node;
+	struct mutex lock;
+	struct clk *clk;
+};
+
+struct clk *of_clk_gpio_delayed_register_get(struct of_phandle_args *clkspec,
+					     void *_data)
+{
+	struct clk_gpio_delayed_register_data *data = _data;
+	struct clk *clk;
+	const char *clk_name = data->node->name;
+	const char *parent_name;
+	struct gpio_desc *gpiod;
+	int gpio;
+
+	mutex_lock(&data->lock);
+
+	if (data->clk) {
+		mutex_unlock(&data->lock);
+		return data->clk;
+	}
+
+	gpio = of_get_named_gpio_flags(data->node, "enable-gpios", 0, NULL);
+	if (gpio < 0) {
+		mutex_unlock(&data->lock);
+		if (gpio != -EPROBE_DEFER)
+			pr_err("%s: %s: Can't get 'enable-gpios' DT property\n",
+			       __func__, clk_name);
+		return ERR_PTR(gpio);
+	}
+	gpiod = gpio_to_desc(gpio);
+
+	parent_name = of_clk_get_parent_name(data->node, 0);
+
+	clk = clk_register_gpio(NULL, clk_name, parent_name, gpiod, 0);
+	if (IS_ERR(clk)) {
+		mutex_unlock(&data->lock);
+		return clk;
+	}
+
+	data->clk = clk;
+	mutex_unlock(&data->lock);
+
+	return clk;
+}
+
+/**
+ * of_gpio_clk_setup() - Setup function for gpio controlled clock
+ */
+void __init of_gpio_clk_setup(struct device_node *node)
+{
+	struct clk_gpio_delayed_register_data *data;
+
+	data = kzalloc(sizeof(struct clk_gpio_delayed_register_data),
+		       GFP_KERNEL);
+	if (!data) {
+		pr_err("%s: could not allocate gpio clk\n", __func__);
+		return;
+	}
+
+	data->node = node;
+	mutex_init(&data->lock);
+
+	of_clk_add_provider(node, of_clk_gpio_delayed_register_get, data);
+}
+EXPORT_SYMBOL_GPL(of_gpio_clk_setup);
+CLK_OF_DECLARE(gpio_clk, "gpio-clock", of_gpio_clk_setup);
+#endif
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 0c287db..09252d9 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -488,6 +488,29 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
 		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
 		unsigned long flags);
 
+/***
+ * struct clk_gpio - gpio controlled clock
+ *
+ * @hw:		handle between common and hardware-specific interfaces
+ * @gpio:	gpio
+ * @active_low:	gpio polarity
+ *
+ * Clock with a gpio control for enabling and disabling the parent clock.
+ * Implements .enable, .disable and .is_enabled
+ */
+
+struct clk_gpio {
+	struct clk_hw	hw;
+	struct gpio_desc *gpiod;
+};
+
+extern const struct clk_ops clk_gpio_ops;
+struct clk *clk_register_gpio(struct device *dev, const char *name,
+		const char *parent_name, struct gpio_desc *gpio,
+		unsigned long flags);
+
+void of_gpio_clk_setup(struct device_node *node);
+
 /**
  * clk_register - allocate a new clock, register it and return an opaque cookie
  * @dev: device that is registering this clock
-- 
1.7.9.5

[PATCH 3/9] drm/tilcdc: Add I2S HDMI audio config for tda998x

[Jyri Sarha]

The configuration is needed for HDMI audio. The "swap" and "mirr"
parameters have to be correctly set in the configuration in order to
have proper colors in the HDMI picture.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_slave.c |   24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_slave.c b/drivers/gpu/drm/tilcdc/tilcdc_slave.c
index 595068b..e43240a 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_slave.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_slave.c
@@ -19,6 +19,7 @@
 #include <linux/pinctrl/pinmux.h>
 #include <linux/pinctrl/consumer.h>
 #include <drm/drm_encoder_slave.h>
+#include <drm/i2c/tda998x.h>
 
 #include "tilcdc_drv.h"
 
@@ -111,8 +112,29 @@ static const struct drm_encoder_helper_funcs slave_encoder_helper_funcs = {
 		.restore        = drm_i2c_encoder_restore,
 };
 
+static struct tda998x_encoder_params tda998x_pdata = {
+	.swap_b = 0x3,
+	.mirr_b = 0x0,
+	.swap_a = 0x2,
+	.mirr_a = 0x0,
+	.swap_d = 0x1,
+	.mirr_d = 0x0,
+	.swap_c = 0x0,
+	.mirr_c = 0x0,
+	.swap_f = 0x5,
+	.mirr_f = 0x0,
+	.swap_e = 0x4,
+	.mirr_e = 0x0,
+	.audio_cfg = 0x3,	/* I2S mode */
+	.audio_clk_cfg = 1,	/* select clock pin */
+	.audio_frame[1] = 1,	/* channels - 1 */
+	.audio_format = AFMT_I2S,
+	.audio_sample_rate = 48000,
+};
+
 static const struct i2c_board_info info = {
-		I2C_BOARD_INFO("tda998x", 0x70)
+		I2C_BOARD_INFO("tda998x", 0x70),
+		.platform_data = &tda998x_pdata,
 };
 
 static struct drm_encoder *slave_encoder_create(struct drm_device *dev,
-- 
1.7.9.5

[PATCH 4/9] ASoC: davinci-evm: HDMI audio support for TDA998x trough McASP I2S bus

[Jyri Sarha]

Add machine driver support for BeagleBone-Black HDMI audio. BBB has
NXP TDA998X HDMI transmitter connected to McASP port in I2S mode. The
44100 Hz sample-rate and it's multiples can not be accurately produced
on BBB. The only supported sample format is SNDRV_PCM_FORMAT_S32_LE.
The 8 least significant bits are ignored.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 .../bindings/sound/davinci-evm-audio.txt           |    4 +-
 sound/soc/davinci/davinci-evm.c                    |   82 +++++++++++++++++++-
 2 files changed, 83 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
index 963e100..c137436 100644
--- a/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
+++ b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
@@ -1,7 +1,9 @@
 * Texas Instruments SoC audio setups with TLV320AIC3X Codec
 
 Required properties:
-- compatible : "ti,da830-evm-audio" : forDM365/DA8xx/OMAPL1x/AM33xx
+- compatible : "ti,da830-evm-audio" : for DM365/DA8xx/OMAPL1x/AM33xx
+               "ti,am335x-beaglebone-black-audio" : for Beaglebone-black HDMI
+                                                    audio
 - ti,model : The user-visible name of this sound complex.
 - ti,audio-codec : The phandle of the TLV320AIC3x audio codec
 - ti,mcasp-controller : The phandle of the McASP controller
diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
index a50010e..9b98667 100644
--- a/sound/soc/davinci/davinci-evm.c
+++ b/sound/soc/davinci/davinci-evm.c
@@ -21,6 +21,7 @@
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
+#include <sound/pcm_params.h>
 
 #include <asm/dma.h>
 #include <asm/mach-types.h>
@@ -83,12 +84,46 @@ static int evm_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
+/* If changing sample format the tda998x configuration (REG_CTS_N) needs
+   to be changed. */
+#define TDA998X_SAMPLE_FORMAT SNDRV_PCM_FORMAT_S32_LE
+static int evm_tda998x_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_mask *fmt = constrs_mask(&runtime->hw_constraints,
+					    SNDRV_PCM_HW_PARAM_FORMAT);
+	snd_mask_none(fmt);
+	snd_mask_set(fmt, TDA998X_SAMPLE_FORMAT);
+
+	return evm_startup(substream);
+}
+
+static int evm_tda998x_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;
+	struct snd_soc_card *soc_card = rtd->card;
+	struct snd_soc_card_drvdata_davinci *drvdata =
+		snd_soc_card_get_drvdata(soc_card);
+
+	return snd_soc_dai_set_sysclk(cpu_dai, 0, drvdata->sysclk,
+				      SND_SOC_CLOCK_IN);
+}
+
 static struct snd_soc_ops evm_ops = {
 	.startup = evm_startup,
 	.shutdown = evm_shutdown,
 	.hw_params = evm_hw_params,
 };
 
+
+static struct snd_soc_ops evm_tda998x_ops = {
+	.startup = evm_tda998x_startup,
+	.shutdown = evm_shutdown,
+	.hw_params = evm_tda998x_hw_params,
+};
+
 /* davinci-evm machine dapm widgets */
 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
@@ -149,6 +184,35 @@ static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 	return 0;
 }
 
+static const struct snd_soc_dapm_widget tda998x_dapm_widgets[] = {
+	SND_SOC_DAPM_OUTPUT("HDMI Out"),
+};
+
+static int evm_tda998x_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dapm_context *dapm = &rtd->codec->dapm;
+	struct snd_soc_card *soc_card = rtd->card;
+	int ret;
+
+	ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, 1);
+	if (ret < 0)
+		return ret;
+
+	snd_soc_dapm_new_controls(dapm, tda998x_dapm_widgets,
+				  ARRAY_SIZE(tda998x_dapm_widgets));
+
+	ret = snd_soc_of_parse_audio_routing(soc_card, "ti,audio-routing");
+
+	/* not connected */
+	snd_soc_dapm_disable_pin(dapm, "RX");
+
+	/* always connected */
+	snd_soc_dapm_enable_pin(dapm, "HDMI Out");
+
+	return 0;
+}
+
 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link dm6446_evm_dai = {
 	.name = "TLV320AIC3X",
@@ -334,7 +398,7 @@ static struct snd_soc_card da850_snd_soc_card = {
 #if defined(CONFIG_OF)
 
 /*
- * The struct is used as place holder. It will be completely
+ * The structs are used as place holders. They will be completely
  * filled with data from dt node.
  */
 static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
@@ -347,10 +411,24 @@ static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
 		   SND_SOC_DAIFMT_IB_NF,
 };
 
+static struct snd_soc_dai_link evm_dai_tda998x_hdmi = {
+	.name		= "NXP TDA998x HDMI Chip",
+	.stream_name	= "HDMI",
+	.codec_dai_name	= "hdmi-hifi",
+	.ops		= &evm_tda998x_ops,
+	.init           = evm_tda998x_init,
+	.dai_fmt	= (SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_I2S |
+			   SND_SOC_DAIFMT_IB_NF),
+};
+
 static const struct of_device_id davinci_evm_dt_ids[] = {
 	{
 		.compatible = "ti,da830-evm-audio",
-		.data = (void *) &evm_dai_tlv320aic3x,
+		.data = &evm_dai_tlv320aic3x,
+	},
+	{
+		.compatible = "ti,am335x-beaglebone-black-audio",
+		.data = &evm_dai_tda998x_hdmi,
 	},
 	{ /* sentinel */ }
 };
-- 
1.7.9.5

[PATCH 5/9] ASoC: davinci: HDMI audio build for AM33XX and TDA998x

[Jyri Sarha]

Adds configuration option for HDMI audio support for AM33XX based
boards with NXP TDA998x HDMI transmitter. The audio is connected to
NXP TDA998x trough McASP running in i2s mode.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 sound/soc/davinci/Kconfig |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/soc/davinci/Kconfig b/sound/soc/davinci/Kconfig
index b310dd3..59c61a0 100644
--- a/sound/soc/davinci/Kconfig
+++ b/sound/soc/davinci/Kconfig
@@ -37,6 +37,18 @@ config SND_AM33XX_SOC_EVM
 	  AM335X-EVMSK, and BeagelBone with AudioCape boards have this
 	  setup.
 
+config SND_AM335X_SOC_NXPTDA_EVM
+	tristate "HDMI Audio for the AM33XX chip based boards with TDA998x"
+	depends on SND_EDMA_SOC && SOC_AM33XX && DRM_I2C_NXP_TDA998X
+	select SND_SOC_HDMI_CODEC
+	select SND_DAVINCI_SOC_MCASP
+	select SND_DAVINCI_SOC_GENERIC_EVM
+	help
+	  Say Y or M if you want to add support for HDMI SoC audio on
+	  AM33XX boards with NXP TDA998x HDMI transmitter. For example
+	  BeagleBoneBack. The audio is connected to NXP TDA998x trough
+	  McASP running in i2s mode.
+
 config SND_DAVINCI_SOC_EVM
 	tristate "SoC Audio support for DaVinci DM6446, DM355 or DM365 EVM"
 	depends on SND_DAVINCI_SOC && I2C
-- 
1.7.9.5

[PATCH 6/9] ARM: dts: am33xx: Add external clock provider

[Jyri Sarha]

Add external clock provaider for am33xx devices.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 arch/arm/boot/dts/am33xx.dtsi |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 4a4e02d..5093c64 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -92,6 +92,16 @@
 		pinctrl-single,function-mask = <0x7f>;
 	};
 
+	ext_clocks {
+		compatible = "ti,external-clocks";
+
+		ext_clocks: clocks {
+		};
+
+		ext_clockdomains: clockdomains {
+		};
+	};
+
 	/*
 	 * XXX: Use a flat representation of the AM33XX interconnect.
 	 * The real AM33XX interconnect network is quite complex. Since
-- 
1.7.9.5

Re: [PATCH 6/9] ARM: dts: am33xx: Add external clock provider

[Ezequiel Garcia]

On 06 Aug 04:47 PM, Jyri Sarha wrote:
> Add external clock provaider for am33xx devices.

Typo: s/provaider/provider

-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
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[PATCH 7/9] ARM: dts: am335x-boneblack: Add HDMI audio support

[Jyri Sarha]

Adds mcasp0_pins, clk_mcasp0_fixed, clk_mcasp0, mcasp0, hdmi_audio,
and sound nodes.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 arch/arm/boot/dts/am335x-boneblack.dts |   54 ++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/arch/arm/boot/dts/am335x-boneblack.dts b/arch/arm/boot/dts/am335x-boneblack.dts
index 305975d..c3c4618 100644
--- a/arch/arm/boot/dts/am335x-boneblack.dts
+++ b/arch/arm/boot/dts/am335x-boneblack.dts
@@ -59,12 +59,50 @@
 			0x1b0 0x03      /* xdma_event_intr0, OMAP_MUX_MODE3 | AM33XX_PIN_OUTPUT */
 		>;
 	};
+
+	mcasp0_pins: mcasp0_pins {
+		pinctrl-single,pins = <
+			0x1ac (PIN_INPUT_PULLUP | MUX_MODE0)	/* mcasp0_ahclkx.mcasp0_ahclkx */
+			0x19c (PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* mcasp0_ahclkr.mcasp0_axr2 */
+			0x194 (PIN_OUTPUT_PULLUP | MUX_MODE0)	/* mcasp0_fsx.mcasp0_fsx */
+			0x190 (PIN_OUTPUT_PULLDOWN | MUX_MODE0)	/* mcasp0_aclkx.mcasp0_aclkx */
+			0x06c (PIN_OUTPUT_PULLDOWN | MUX_MODE7)	/* gpmc_a11.GPIO1_27 */
+		>;
+	};
 };
 
 &lcdc {
 	status = "okay";
 };
 
+&mcasp0	{
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcasp0_pins>;
+	status = "okay";
+	op-mode = <0>;	/* MCASP_IIS_MODE */
+	tdm-slots = <2>;
+	serial-dir = <	/* 0: INACTIVE, 1: TX, 2: RX */
+			0 0 1 0
+		>;
+	tx-num-evt = <1>;
+	rx-num-evt = <1>;
+};
+
+&ext_clocks {
+	clk_mcasp0_fixed: clk_mcasp0_fixed {
+	      #clock-cells = <0>;
+	      compatible = "fixed-clock";
+	      clock-frequency = <24576000>;
+	};
+
+	clk_mcasp0: clk_mcasp0 {
+	      #clock-cells = <0>;
+	      compatible = "gpio-clock";
+	      clocks = <&clk_mcasp0_fixed>;
+	      enable-gpios = <&gpio1 27 0>; /* BeagleBone Black Clk enable on GPIO1_27 */
+	};
+};
+
 / {
 	hdmi {
 		compatible = "ti,tilcdc,slave";
@@ -74,4 +112,20 @@
 		pinctrl-1 = <&nxp_hdmi_bonelt_off_pins>;
 		status = "okay";
 	};
+
+	hdmi_audio: hdmi_audio@0 {
+	       compatible = "linux,hdmi-audio";
+	       status = "okay";
+	};
+
+	sound {
+		compatible = "ti,am335x-beaglebone-black-audio";
+		ti,model = "TI BeagleBone Black";
+		ti,audio-codec = <&hdmi_audio>;
+		ti,mcasp-controller = <&mcasp0>;
+		ti,audio-routing =
+			"HDMI Out",	"TX";
+		clocks = <&clk_mcasp0>;
+		clock-names = "mclk";
+	};
 };
-- 
1.7.9.5

[PATCH 8/9] ARM: OMAP2+: omap2plus_defconfig: TDA998X HDMI trough tilcdc,slave

[Jyri Sarha]

Select CONFIG_DRM=m, CONFIG_DRM_I2C_NXP_TDA998X=m, and
CONFIG_DRM_TILCDC=m, for Beaglebone-Black HDMI video support.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 arch/arm/configs/omap2plus_defconfig |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index 536a137..8b07fda 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -191,6 +191,9 @@ CONFIG_REGULATOR_TPS65217=y
 CONFIG_REGULATOR_TPS65910=y
 CONFIG_REGULATOR_TWL4030=y
 CONFIG_REGULATOR_PBIAS=y
+CONFIG_DRM=m
+CONFIG_DRM_I2C_NXP_TDA998X=m
+CONFIG_DRM_TILCDC=m
 CONFIG_FB=y
 CONFIG_FIRMWARE_EDID=y
 CONFIG_FB_MODE_HELPERS=y
-- 
1.7.9.5

[PATCH 9/9] ARM: OMAP2+: omap2plus_defconfig: Enable BeagleBone Black HDMI audio support

[Jyri Sarha]

Select CONFIG_SND_EDMA_SOC=m and CONFIG_SND_AM335X_SOC_NXPTDA_EVM=m
for BBB HDMI audio.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 arch/arm/configs/omap2plus_defconfig |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index 8b07fda..73dbfad 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -222,7 +222,9 @@ CONFIG_SND_DEBUG=y
 CONFIG_SND_USB_AUDIO=m
 CONFIG_SND_SOC=m
 CONFIG_SND_OMAP_SOC=m
+CONFIG_SND_EDMA_SOC=m
 CONFIG_SND_AM33XX_SOC_EVM=m
+CONFIG_SND_AM335X_SOC_NXPTDA_EVM=m
 CONFIG_SND_DAVINCI_SOC=m
 CONFIG_SND_OMAP_SOC_OMAP_TWL4030=m
 CONFIG_SND_OMAP_SOC_OMAP_ABE_TWL6040=m
-- 
1.7.9.5

Re: [PATCH 0/9] Beaglebone-Black HDMI audio

[Ezequiel Garcia]

Hello Jyri,

On 06 Aug 04:47 PM, Jyri Sarha wrote:
> The code has a functional dependency to:
> http://www.mail-archive.com/linux-omap@vger.kernel.org/msg108199.html
> 
> Without the above patch the audio card does not probe.
> 
> The code has been rebased on top of Linux 3.16 merged with 
> git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
> with http://www.mail-archive.com/linux-omap@vger.kernel.org/msg108199.html
> cherry-picked on top.
> 
> All patches have gone trough some cleaning up since the RFC version of
> these patches over half a year ago.
> 

To my surprise, this worked out of the box. Did some simple tests with mpg123
and mplayer.

Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>

Thanks a lot!
-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com