ASoC: meson: add g12a tohdmitx control (c8609f38) · Commits · e / devices / android_kernel_fairphone_FP5

sound/soc/meson/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -56,6 +56,7 @@ config SND_MESON_AXG_SOUND_CARD
		imply SND_MESON_AXG_SPDIFOUT
		imply SND_MESON_AXG_SPDIFIN
		imply SND_MESON_AXG_PDM
		imply SND_MESON_G12A_TOHDMITX if DRM_MESON_DW_HDMI
		help
		Select Y or M to add support for the AXG SoC sound card

		@@ -82,4 +83,11 @@ config SND_MESON_AXG_PDM
		help
		Select Y or M to add support for PDM input embedded
		in the Amlogic AXG SoC family

		config SND_MESON_G12A_TOHDMITX
		tristate "Amlogic G12A To HDMI TX Control Support"
		imply SND_SOC_HDMI_CODEC
		help
		Select Y or M to add support for HDMI audio on the g12a SoC
		family
		endmenu

sound/soc/meson/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -11,6 +11,7 @@ snd-soc-meson-axg-sound-card-objs := axg-card.o
		snd-soc-meson-axg-spdifin-objs := axg-spdifin.o
		snd-soc-meson-axg-spdifout-objs := axg-spdifout.o
		snd-soc-meson-axg-pdm-objs := axg-pdm.o
		snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o

		obj-$(CONFIG_SND_MESON_AXG_FIFO) += snd-soc-meson-axg-fifo.o
		obj-$(CONFIG_SND_MESON_AXG_FRDDR) += snd-soc-meson-axg-frddr.o
		@@ -23,3 +24,4 @@ obj-$(CONFIG_SND_MESON_AXG_SOUND_CARD) += snd-soc-meson-axg-sound-card.o
		obj-$(CONFIG_SND_MESON_AXG_SPDIFIN) += snd-soc-meson-axg-spdifin.o
		obj-$(CONFIG_SND_MESON_AXG_SPDIFOUT) += snd-soc-meson-axg-spdifout.o
		obj-$(CONFIG_SND_MESON_AXG_PDM) += snd-soc-meson-axg-pdm.o
		obj-$(CONFIG_SND_MESON_G12A_TOHDMITX) += snd-soc-meson-g12a-tohdmitx.o

sound/soc/meson/g12a-tohdmitx.c

0 → 100644

+413 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		//
		// Copyright (c) 2019 BayLibre, SAS.
		// Author: Jerome Brunet <jbrunet@baylibre.com>

		#include <linux/bitfield.h>
		#include <linux/clk.h>
		#include <linux/module.h>
		#include <sound/pcm_params.h>
		#include <linux/regmap.h>
		#include <sound/soc.h>
		#include <sound/soc-dai.h>

		#include <dt-bindings/sound/meson-g12a-tohdmitx.h>

		#define G12A_TOHDMITX_DRV_NAME "g12a-tohdmitx"

		#define TOHDMITX_CTRL0 0x0
		#define CTRL0_ENABLE_SHIFT 31
		#define CTRL0_I2S_DAT_SEL GENMASK(13, 12)
		#define CTRL0_I2S_LRCLK_SEL GENMASK(9, 8)
		#define CTRL0_I2S_BLK_CAP_INV BIT(7)
		#define CTRL0_I2S_BCLK_O_INV BIT(6)
		#define CTRL0_I2S_BCLK_SEL GENMASK(5, 4)
		#define CTRL0_SPDIF_CLK_CAP_INV BIT(3)
		#define CTRL0_SPDIF_CLK_O_INV BIT(2)
		#define CTRL0_SPDIF_SEL BIT(1)
		#define CTRL0_SPDIF_CLK_SEL BIT(0)

		struct g12a_tohdmitx_input {
		struct snd_pcm_hw_params params;
		unsigned int fmt;
		};

		static struct snd_soc_dapm_widget *
		g12a_tohdmitx_get_input(struct snd_soc_dapm_widget *w)
		{
		struct snd_soc_dapm_path *p = NULL;
		struct snd_soc_dapm_widget *in;

		snd_soc_dapm_widget_for_each_source_path(w, p) {
		if (!p->connect)
		continue;

		/* Check that we still are in the same component */
		if (snd_soc_dapm_to_component(w->dapm) !=
		snd_soc_dapm_to_component(p->source->dapm))
		continue;

		if (p->source->id == snd_soc_dapm_dai_in)
		return p->source;

		in = g12a_tohdmitx_get_input(p->source);
		if (in)
		return in;
		}

		return NULL;
		}

		static struct g12a_tohdmitx_input *
		g12a_tohdmitx_get_input_data(struct snd_soc_dapm_widget *w)
		{
		struct snd_soc_dapm_widget *in =
		g12a_tohdmitx_get_input(w);
		struct snd_soc_dai *dai;

		if (WARN_ON(!in))
		return NULL;

		dai = in->priv;

		return dai->playback_dma_data;
		}

		static const char * const g12a_tohdmitx_i2s_mux_texts[] = {
		"I2S A", "I2S B", "I2S C",
		};

		static SOC_ENUM_SINGLE_EXT_DECL(g12a_tohdmitx_i2s_mux_enum,
		g12a_tohdmitx_i2s_mux_texts);

		static int g12a_tohdmitx_get_input_val(struct snd_soc_component *component,
		unsigned int mask)
		{
		unsigned int val;

		snd_soc_component_read(component, TOHDMITX_CTRL0, &val);
		return (val & mask) >> __ffs(mask);
		}

		static int g12a_tohdmitx_i2s_mux_get_enum(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
		{
		struct snd_soc_component *component =
		snd_soc_dapm_kcontrol_component(kcontrol);

		ucontrol->value.enumerated.item[0] =
		g12a_tohdmitx_get_input_val(component, CTRL0_I2S_DAT_SEL);

		return 0;
		}

		static int g12a_tohdmitx_i2s_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 = ucontrol->value.enumerated.item[0];
		unsigned int val = g12a_tohdmitx_get_input_val(component,
		CTRL0_I2S_DAT_SEL);

		/* Force disconnect of the mux while updating */
		if (val != mux)
		snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);

		snd_soc_component_update_bits(component, TOHDMITX_CTRL0,
		CTRL0_I2S_DAT_SEL \|
		CTRL0_I2S_LRCLK_SEL \|
		CTRL0_I2S_BCLK_SEL,
		FIELD_PREP(CTRL0_I2S_DAT_SEL, mux) \|
		FIELD_PREP(CTRL0_I2S_LRCLK_SEL, mux) \|
		FIELD_PREP(CTRL0_I2S_BCLK_SEL, mux));

		snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);

		return 0;
		}

		static const struct snd_kcontrol_new g12a_tohdmitx_i2s_mux =
		SOC_DAPM_ENUM_EXT("I2S Source", g12a_tohdmitx_i2s_mux_enum,
		g12a_tohdmitx_i2s_mux_get_enum,
		g12a_tohdmitx_i2s_mux_put_enum);

		static const char * const g12a_tohdmitx_spdif_mux_texts[] = {
		"SPDIF A", "SPDIF B",
		};

		static SOC_ENUM_SINGLE_EXT_DECL(g12a_tohdmitx_spdif_mux_enum,
		g12a_tohdmitx_spdif_mux_texts);

		static int g12a_tohdmitx_spdif_mux_get_enum(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
		{
		struct snd_soc_component *component =
		snd_soc_dapm_kcontrol_component(kcontrol);

		ucontrol->value.enumerated.item[0] =
		g12a_tohdmitx_get_input_val(component, CTRL0_SPDIF_SEL);

		return 0;
		}

		static int g12a_tohdmitx_spdif_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 = ucontrol->value.enumerated.item[0];
		unsigned int val = g12a_tohdmitx_get_input_val(component,
		CTRL0_SPDIF_SEL);

		/* Force disconnect of the mux while updating */
		if (val != mux)
		snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);

		snd_soc_component_update_bits(component, TOHDMITX_CTRL0,
		CTRL0_SPDIF_SEL \|
		CTRL0_SPDIF_CLK_SEL,
		FIELD_PREP(CTRL0_SPDIF_SEL, mux) \|
		FIELD_PREP(CTRL0_SPDIF_CLK_SEL, mux));

		snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);

		return 0;
		}

		static const struct snd_kcontrol_new g12a_tohdmitx_spdif_mux =
		SOC_DAPM_ENUM_EXT("SPDIF Source", g12a_tohdmitx_spdif_mux_enum,
		g12a_tohdmitx_spdif_mux_get_enum,
		g12a_tohdmitx_spdif_mux_put_enum);

		static const struct snd_kcontrol_new g12a_tohdmitx_out_enable =
		SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOHDMITX_CTRL0,
		CTRL0_ENABLE_SHIFT, 1, 0);

		static const struct snd_soc_dapm_widget g12a_tohdmitx_widgets[] = {
		SND_SOC_DAPM_MUX("I2S SRC", SND_SOC_NOPM, 0, 0,
		&g12a_tohdmitx_i2s_mux),
		SND_SOC_DAPM_SWITCH("I2S OUT EN", SND_SOC_NOPM, 0, 0,
		&g12a_tohdmitx_out_enable),
		SND_SOC_DAPM_MUX("SPDIF SRC", SND_SOC_NOPM, 0, 0,
		&g12a_tohdmitx_spdif_mux),
		SND_SOC_DAPM_SWITCH("SPDIF OUT EN", SND_SOC_NOPM, 0, 0,
		&g12a_tohdmitx_out_enable),
		};

		static int g12a_tohdmitx_input_probe(struct snd_soc_dai *dai)
		{
		struct g12a_tohdmitx_input *data;

		data = kzalloc(sizeof(*data), GFP_KERNEL);
		if (!data)
		return -ENOMEM;

		dai->playback_dma_data = data;
		return 0;
		}

		static int g12a_tohdmitx_input_remove(struct snd_soc_dai *dai)
		{
		kfree(dai->playback_dma_data);
		return 0;
		}

		static int g12a_tohdmitx_input_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct snd_soc_dai *dai)
		{
		struct g12a_tohdmitx_input *data = dai->playback_dma_data;

		/* Save the stream params for the downstream link */
		memcpy(&data->params, params, sizeof(*params));

		return 0;
		}

		static int g12a_tohdmitx_output_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct snd_soc_dai *dai)
		{
		struct g12a_tohdmitx_input *in_data =
		g12a_tohdmitx_get_input_data(dai->capture_widget);

		if (!in_data)
		return -ENODEV;

		memcpy(params, &in_data->params, sizeof(*params));

		return 0;
		}

		static int g12a_tohdmitx_input_set_fmt(struct snd_soc_dai *dai,
		unsigned int fmt)
		{
		struct g12a_tohdmitx_input *data = dai->playback_dma_data;

		/* Save the source stream format for the downstream link */
		data->fmt = fmt;
		return 0;
		}

		static int g12a_tohdmitx_output_startup(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct g12a_tohdmitx_input *in_data =
		g12a_tohdmitx_get_input_data(dai->capture_widget);

		if (!in_data)
		return -ENODEV;

		if (!in_data->fmt)
		return 0;

		return snd_soc_runtime_set_dai_fmt(rtd, in_data->fmt);
		}

		static const struct snd_soc_dai_ops g12a_tohdmitx_input_ops = {
		.hw_params = g12a_tohdmitx_input_hw_params,
		.set_fmt = g12a_tohdmitx_input_set_fmt,
		};

		static const struct snd_soc_dai_ops g12a_tohdmitx_output_ops = {
		.hw_params = g12a_tohdmitx_output_hw_params,
		.startup = g12a_tohdmitx_output_startup,
		};

		#define TOHDMITX_SPDIF_FORMATS \
		(SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \| \
		SNDRV_PCM_FMTBIT_S24_3LE \| SNDRV_PCM_FMTBIT_S24_LE)

		#define TOHDMITX_I2S_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 TOHDMITX_STREAM(xname, xsuffix, xfmt, xchmax) \
		{ \
		.stream_name = xname " " xsuffix, \
		.channels_min = 1, \
		.channels_max = (xchmax), \
		.rate_min = 8000, \
		.rate_max = 192000, \
		.formats = (xfmt), \
		}

		#define TOHDMITX_IN(xname, xid, xfmt, xchmax) { \
		.name = xname, \
		.id = (xid), \
		.playback = TOHDMITX_STREAM(xname, "Playback", xfmt, xchmax), \
		.ops = &g12a_tohdmitx_input_ops, \
		.probe = g12a_tohdmitx_input_probe, \
		.remove = g12a_tohdmitx_input_remove, \
		}

		#define TOHDMITX_OUT(xname, xid, xfmt, xchmax) { \
		.name = xname, \
		.id = (xid), \
		.capture = TOHDMITX_STREAM(xname, "Capture", xfmt, xchmax), \
		.ops = &g12a_tohdmitx_output_ops, \
		}

		static struct snd_soc_dai_driver g12a_tohdmitx_dai_drv[] = {
		TOHDMITX_IN("I2S IN A", TOHDMITX_I2S_IN_A,
		TOHDMITX_I2S_FORMATS, 8),
		TOHDMITX_IN("I2S IN B", TOHDMITX_I2S_IN_B,
		TOHDMITX_I2S_FORMATS, 8),
		TOHDMITX_IN("I2S IN C", TOHDMITX_I2S_IN_C,
		TOHDMITX_I2S_FORMATS, 8),
		TOHDMITX_OUT("I2S OUT", TOHDMITX_I2S_OUT,
		TOHDMITX_I2S_FORMATS, 8),
		TOHDMITX_IN("SPDIF IN A", TOHDMITX_SPDIF_IN_A,
		TOHDMITX_SPDIF_FORMATS, 2),
		TOHDMITX_IN("SPDIF IN B", TOHDMITX_SPDIF_IN_B,
		TOHDMITX_SPDIF_FORMATS, 2),
		TOHDMITX_OUT("SPDIF OUT", TOHDMITX_SPDIF_OUT,
		TOHDMITX_SPDIF_FORMATS, 2),
		};

		static int g12a_tohdmi_component_probe(struct snd_soc_component *c)
		{
		/* Initialize the static clock parameters */
		return snd_soc_component_write(c, TOHDMITX_CTRL0,
		CTRL0_I2S_BLK_CAP_INV \| CTRL0_SPDIF_CLK_CAP_INV);
		}

		static const struct snd_soc_dapm_route g12a_tohdmitx_routes[] = {
		{ "I2S SRC", "I2S A", "I2S IN A Playback" },
		{ "I2S SRC", "I2S B", "I2S IN B Playback" },
		{ "I2S SRC", "I2S C", "I2S IN C Playback" },
		{ "I2S OUT EN", "Switch", "I2S SRC" },
		{ "I2S OUT Capture", NULL, "I2S OUT EN" },
		{ "SPDIF SRC", "SPDIF A", "SPDIF IN A Playback" },
		{ "SPDIF SRC", "SPDIF B", "SPDIF IN B Playback" },
		{ "SPDIF OUT EN", "Switch", "SPDIF SRC" },
		{ "SPDIF OUT Capture", NULL, "SPDIF OUT EN" },
		};

		static const struct snd_soc_component_driver g12a_tohdmitx_component_drv = {
		.probe = g12a_tohdmi_component_probe,
		.dapm_widgets = g12a_tohdmitx_widgets,
		.num_dapm_widgets = ARRAY_SIZE(g12a_tohdmitx_widgets),
		.dapm_routes = g12a_tohdmitx_routes,
		.num_dapm_routes = ARRAY_SIZE(g12a_tohdmitx_routes),
		.endianness = 1,
		.non_legacy_dai_naming = 1,
		};

		static const struct regmap_config g12a_tohdmitx_regmap_cfg = {
		.reg_bits = 32,
		.val_bits = 32,
		.reg_stride = 4,
		};

		static const struct of_device_id g12a_tohdmitx_of_match[] = {
		{ .compatible = "amlogic,g12a-tohdmitx", },
		{}
		};
		MODULE_DEVICE_TABLE(of, g12a_tohdmitx_of_match);

		static int g12a_tohdmitx_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct resource *res;
		void __iomem *regs;
		struct regmap *map;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		regs = devm_ioremap_resource(dev, res);
		if (IS_ERR(regs))
		return PTR_ERR(regs);

		map = devm_regmap_init_mmio(dev, regs, &g12a_tohdmitx_regmap_cfg);
		if (IS_ERR(map)) {
		dev_err(dev, "failed to init regmap: %ld\n",
		PTR_ERR(map));
		return PTR_ERR(map);
		}

		return devm_snd_soc_register_component(dev,
		&g12a_tohdmitx_component_drv, g12a_tohdmitx_dai_drv,
		ARRAY_SIZE(g12a_tohdmitx_dai_drv));
		}

		static struct platform_driver g12a_tohdmitx_pdrv = {
		.driver = {
		.name = G12A_TOHDMITX_DRV_NAME,
		.of_match_table = g12a_tohdmitx_of_match,
		},
		.probe = g12a_tohdmitx_probe,
		};
		module_platform_driver(g12a_tohdmitx_pdrv);

		MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
		MODULE_DESCRIPTION("Amlogic G12a To HDMI Tx Control Codec Driver");
		MODULE_LICENSE("GPL v2");