Add support for the hdmitx control glue of the Amlogic g12a SoC family. This glue links the 3 TDM and 2 SPDIF output interfaces of the SoC to the related inputs of the Synopsys HDMI controller found in these SoCs.
Signed-off-by: Jerome Brunet jbrunet@baylibre.com --- sound/soc/meson/Kconfig | 8 + sound/soc/meson/Makefile | 2 + sound/soc/meson/g12a-tohdmitx.c | 413 ++++++++++++++++++++++++++++++++ 3 files changed, 423 insertions(+) create mode 100644 sound/soc/meson/g12a-tohdmitx.c
diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig index 8779fe23671d..4e5b4d4f3531 100644 --- a/sound/soc/meson/Kconfig +++ b/sound/soc/meson/Kconfig @@ -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 diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile index b45dfb9e2f88..1a8b1470ed84 100644 --- a/sound/soc/meson/Makefile +++ b/sound/soc/meson/Makefile @@ -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 diff --git a/sound/soc/meson/g12a-tohdmitx.c b/sound/soc/meson/g12a-tohdmitx.c new file mode 100644 index 000000000000..707ccb192e4c --- /dev/null +++ b/sound/soc/meson/g12a-tohdmitx.c @@ -0,0 +1,413 @@ +// 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");