ASoC: meson: aiu: add hdmi codec control support

Add the codec to codec component which handles the routing between
the audio producers (PCM and I2S) and the synopsys hdmi controller
on the amlogic GX SoC family

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200213155159.3235792-6-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/meson/Kconfig

@@ -4,7 +4,9 @@ menu "ASoC support for Amlogic platforms"
 
 config SND_MESON_AIU
 	tristate "Amlogic AIU"
+	select SND_MESON_CODEC_GLUE
 	select SND_PCM_IEC958
+	imply SND_SOC_HDMI_CODEC if DRM_MESON_DW_HDMI
 	help
 	  Select Y or M to add support for the Audio output subsystem found
 	  in the Amlogic GX SoC family

sound/soc/meson/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: (GPL-2.0 OR MIT)
 
 snd-soc-meson-aiu-objs := aiu.o
+snd-soc-meson-aiu-objs += aiu-codec-ctrl.o
 snd-soc-meson-aiu-objs += aiu-encoder-i2s.o
 snd-soc-meson-aiu-objs += aiu-encoder-spdif.o
 snd-soc-meson-aiu-objs += aiu-fifo.o

sound/soc/meson/aiu-codec-ctrl.c

@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2020 BayLibre, SAS.
+// Author: Jerome Brunet <jbrunet@baylibre.com>
+
+#include <linux/bitfield.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include <dt-bindings/sound/meson-aiu.h>
+#include "aiu.h"
+#include "meson-codec-glue.h"
+
+#define CTRL_CLK_SEL		GENMASK(1, 0)
+#define CTRL_DATA_SEL_SHIFT	4
+#define CTRL_DATA_SEL		(0x3 << CTRL_DATA_SEL_SHIFT)
+
+static const char * const aiu_codec_ctrl_mux_texts[] = {
+	"DISABLED", "PCM", "I2S",
+};
+
+static int aiu_codec_ctrl_mux_put_enum(struct snd_kcontrol *kcontrol,
+				       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+		snd_soc_dapm_kcontrol_component(kcontrol);
+	struct snd_soc_dapm_context *dapm =
+		snd_soc_dapm_kcontrol_dapm(kcontrol);
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+	unsigned int mux, changed;
+
+	mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
+	changed = snd_soc_component_test_bits(component, e->reg,
+					      CTRL_DATA_SEL,
+					      FIELD_PREP(CTRL_DATA_SEL, mux));
+
+	if (!changed)
+		return 0;
+
+	/* Force disconnect of the mux while updating */
+	snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
+
+	/* Reset the source first */
+	snd_soc_component_update_bits(component, e->reg,
+				      CTRL_CLK_SEL |
+				      CTRL_DATA_SEL,
+				      FIELD_PREP(CTRL_CLK_SEL, 0) |
+				      FIELD_PREP(CTRL_DATA_SEL, 0));
+
+	/* Set the appropriate source */
+	snd_soc_component_update_bits(component, e->reg,
+				      CTRL_CLK_SEL |
+				      CTRL_DATA_SEL,
+				      FIELD_PREP(CTRL_CLK_SEL, mux) |
+				      FIELD_PREP(CTRL_DATA_SEL, mux));
+
+	snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
+
+	return 0;
+}
+
+static SOC_ENUM_SINGLE_DECL(aiu_hdmi_ctrl_mux_enum, AIU_HDMI_CLK_DATA_CTRL,
+			    CTRL_DATA_SEL_SHIFT,
+			    aiu_codec_ctrl_mux_texts);
+
+static const struct snd_kcontrol_new aiu_hdmi_ctrl_mux =
+	SOC_DAPM_ENUM_EXT("HDMI Source", aiu_hdmi_ctrl_mux_enum,
+			  snd_soc_dapm_get_enum_double,
+			  aiu_codec_ctrl_mux_put_enum);
+
+static const struct snd_soc_dapm_widget aiu_hdmi_ctrl_widgets[] = {
+	SND_SOC_DAPM_MUX("HDMI CTRL SRC", SND_SOC_NOPM, 0, 0,
+			 &aiu_hdmi_ctrl_mux),
+};
+
+static const struct snd_soc_dai_ops aiu_codec_ctrl_input_ops = {
+	.hw_params	= meson_codec_glue_input_hw_params,
+	.set_fmt	= meson_codec_glue_input_set_fmt,
+};
+
+static const struct snd_soc_dai_ops aiu_codec_ctrl_output_ops = {
+	.startup	= meson_codec_glue_output_startup,
+};
+
+#define AIU_CODEC_CTRL_FORMATS					\
+	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |	\
+	 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |	\
+	 SNDRV_PCM_FMTBIT_S32_LE)
+
+#define AIU_CODEC_CTRL_STREAM(xname, xsuffix)			\
+{								\
+	.stream_name	= xname " " xsuffix,			\
+	.channels_min	= 1,					\
+	.channels_max	= 8,					\
+	.rate_min       = 5512,					\
+	.rate_max	= 192000,				\
+	.formats	= AIU_CODEC_CTRL_FORMATS,		\
+}
+
+#define AIU_CODEC_CTRL_INPUT(xname) {				\
+	.name = "CODEC CTRL " xname,				\
+	.playback = AIU_CODEC_CTRL_STREAM(xname, "Playback"),	\
+	.ops = &aiu_codec_ctrl_input_ops,			\
+	.probe = meson_codec_glue_input_dai_probe,		\
+	.remove = meson_codec_glue_input_dai_remove,		\
+}
+
+#define AIU_CODEC_CTRL_OUTPUT(xname) {				\
+	.name = "CODEC CTRL " xname,				\
+	.capture = AIU_CODEC_CTRL_STREAM(xname, "Capture"),	\
+	.ops = &aiu_codec_ctrl_output_ops,			\
+}
+
+static struct snd_soc_dai_driver aiu_hdmi_ctrl_dai_drv[] = {
+	[CTRL_I2S] = AIU_CODEC_CTRL_INPUT("HDMI I2S IN"),
+	[CTRL_PCM] = AIU_CODEC_CTRL_INPUT("HDMI PCM IN"),
+	[CTRL_OUT] = AIU_CODEC_CTRL_OUTPUT("HDMI OUT"),
+};
+
+static const struct snd_soc_dapm_route aiu_hdmi_ctrl_routes[] = {
+	{ "HDMI CTRL SRC", "I2S", "HDMI I2S IN Playback" },
+	{ "HDMI CTRL SRC", "PCM", "HDMI PCM IN Playback" },
+	{ "HDMI OUT Capture", NULL, "HDMI CTRL SRC" },
+};
+
+static int aiu_hdmi_of_xlate_dai_name(struct snd_soc_component *component,
+				      struct of_phandle_args *args,
+				      const char **dai_name)
+{
+	return aiu_of_xlate_dai_name(component, args, dai_name, AIU_HDMI);
+}
+
+static const struct snd_soc_component_driver aiu_hdmi_ctrl_component = {
+	.name			= "AIU HDMI Codec Control",
+	.dapm_widgets		= aiu_hdmi_ctrl_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(aiu_hdmi_ctrl_widgets),
+	.dapm_routes		= aiu_hdmi_ctrl_routes,
+	.num_dapm_routes	= ARRAY_SIZE(aiu_hdmi_ctrl_routes),
+	.of_xlate_dai_name	= aiu_hdmi_of_xlate_dai_name,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+int aiu_hdmi_ctrl_register_component(struct device *dev)
+{
+	return aiu_add_component(dev, &aiu_hdmi_ctrl_component,
+				 aiu_hdmi_ctrl_dai_drv,
+				 ARRAY_SIZE(aiu_hdmi_ctrl_dai_drv),
+				 "hdmi");
+}
+

sound/soc/meson/aiu.c

@@ -71,6 +71,26 @@ int aiu_of_xlate_dai_name(struct snd_soc_component *component,
 	return 0;
 }
 
+int aiu_add_component(struct device *dev,
+		      const struct snd_soc_component_driver *component_driver,
+		      struct snd_soc_dai_driver *dai_drv,
+		      int num_dai,
+		      const char *debugfs_prefix)
+{
+	struct snd_soc_component *component;
+
+	component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
+	if (!component)
+		return -ENOMEM;
+
+#ifdef CONFIG_DEBUG_FS
+	component->debugfs_prefix = debugfs_prefix;
+#endif
+
+	return snd_soc_add_component(dev, component, component_driver,
+				     dai_drv, num_dai);
+}
+
 static int aiu_cpu_of_xlate_dai_name(struct snd_soc_component *component,
 				     struct of_phandle_args *args,
 				     const char **dai_name)
@@ -313,9 +333,21 @@ static int aiu_probe(struct platform_device *pdev)
 	ret = snd_soc_register_component(dev, &aiu_cpu_component,
 					 aiu_cpu_dai_drv,
 					 ARRAY_SIZE(aiu_cpu_dai_drv));
-	if (ret)
+	if (ret) {
 		dev_err(dev, "Failed to register cpu component\n");
+		return ret;
+	}
 
+	/* Register the hdmi codec control component */
+	ret = aiu_hdmi_ctrl_register_component(dev);
+	if (ret) {
+		dev_err(dev, "Failed to register hdmi control component\n");
+		goto err;
+	}
+
+	return 0;
+err:
+	snd_soc_unregister_component(dev);
 	return ret;
 }
 

sound/soc/meson/aiu.h

@@ -45,6 +45,14 @@ int aiu_of_xlate_dai_name(struct snd_soc_component *component,
 			  const char **dai_name,
 			  unsigned int component_id);
 
+int aiu_add_component(struct device *dev,
+		      const struct snd_soc_component_driver *component_driver,
+		      struct snd_soc_dai_driver *dai_drv,
+		      int num_dai,
+		      const char *debugfs_prefix);
+
+int aiu_hdmi_ctrl_register_component(struct device *dev);
+
 int aiu_fifo_i2s_dai_probe(struct snd_soc_dai *dai);
 int aiu_fifo_spdif_dai_probe(struct snd_soc_dai *dai);