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Date: Fri, 21 Feb 2020 16:07:33 +0100
From: Jerome Brunet <jbrunet@...libre.com>
To: Mark Brown <broonie@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>
Cc: alsa-devel@...a-project.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org,
Kevin Hilman <khilman@...libre.com>
Subject: Re: [PATCH 2/3] ASoC: meson: g12a: add internal DAC glue driver
On Fri 21 Feb 2020 at 13:22, Jerome Brunet <jbrunet@...libre.com> wrote:
> Add support for the internal audio DAC glue found on the Amlogic g12a
> and sm1 SoC families. This allows to connect the TDM outputs of the SoC
> to the internal t9015 audio DAC.
>
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
Please ignore this patch. It is incomplete, a part was mistakenly
squashed with another change I'm preparing
> ---
> sound/soc/meson/Kconfig | 9 ++
> sound/soc/meson/Makefile | 2 +
> sound/soc/meson/g12a-toacodec.c | 240 ++++++++++++++++++++++++++++++++
> 3 files changed, 251 insertions(+)
> create mode 100644 sound/soc/meson/g12a-toacodec.c
>
> diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig
> index d27e9180b453..8b6295283989 100644
> --- a/sound/soc/meson/Kconfig
> +++ b/sound/soc/meson/Kconfig
> @@ -109,6 +109,15 @@ config SND_MESON_GX_SOUND_CARD
> help
> Select Y or M to add support for the GXBB/GXL SoC sound card
>
> +config SND_MESON_G12A_TOACODEC
> + tristate "Amlogic G12A To Internal DAC Control Support"
> + select SND_MESON_CODEC_GLUE
> + select REGMAP_MMIO
> + imply SND_SOC_MESON_T9015
> + help
> + Select Y or M to add support for the internal audio DAC on the
> + g12a SoC family
> +
> config SND_MESON_G12A_TOHDMITX
> tristate "Amlogic G12A To HDMI TX Control Support"
> select REGMAP_MMIO
> diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile
> index 3c9d48846816..e446bc980481 100644
> --- a/sound/soc/meson/Makefile
> +++ b/sound/soc/meson/Makefile
> @@ -22,6 +22,7 @@ snd-soc-meson-axg-pdm-objs := axg-pdm.o
> snd-soc-meson-card-utils-objs := meson-card-utils.o
> snd-soc-meson-codec-glue-objs := meson-codec-glue.o
> snd-soc-meson-gx-sound-card-objs := gx-card.o
> +snd-soc-meson-g12a-toacodec-objs := g12a-toacodec.o
> snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o
> snd-soc-meson-t9015-objs := t9015.o
>
> @@ -40,5 +41,6 @@ obj-$(CONFIG_SND_MESON_AXG_PDM) += snd-soc-meson-axg-pdm.o
> obj-$(CONFIG_SND_MESON_CARD_UTILS) += snd-soc-meson-card-utils.o
> obj-$(CONFIG_SND_MESON_CODEC_GLUE) += snd-soc-meson-codec-glue.o
> obj-$(CONFIG_SND_MESON_GX_SOUND_CARD) += snd-soc-meson-gx-sound-card.o
> +obj-$(CONFIG_SND_MESON_G12A_TOACODEC) += snd-soc-meson-g12a-toacodec.o
> obj-$(CONFIG_SND_MESON_G12A_TOHDMITX) += snd-soc-meson-g12a-tohdmitx.o
> obj-$(CONFIG_SND_SOC_MESON_T9015) += snd-soc-meson-t9015.o
> diff --git a/sound/soc/meson/g12a-toacodec.c b/sound/soc/meson/g12a-toacodec.c
> new file mode 100644
> index 000000000000..719bbe9966b1
> --- /dev/null
> +++ b/sound/soc/meson/g12a-toacodec.c
> @@ -0,0 +1,240 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (c) 2020 BayLibre, SAS.
> +// Author: Jerome Brunet <jbrunet@...libre.com>
> +
> +#include <linux/bitfield.h>
> +#include <linux/clk.h>
> +#include <linux/module.h>
> +#include <sound/pcm_params.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/reset.h>
> +#include <sound/soc.h>
> +#include <sound/soc-dai.h>
> +
> +#include <dt-bindings/sound/meson-g12a-toacodec.h>
> +#include "axg-tdm.h"
> +#include "meson-codec-glue.h"
> +
> +#define G12A_TOACODEC_DRV_NAME "g12a-toacodec"
> +
> +#define TOACODEC_CTRL0 0x0
> +#define CTRL0_ENABLE_SHIFT 31
> +#define CTRL0_DAT_SEL GENMASK(15, 14)
> +#define CTRL0_LANE_SEL 12
> +#define CTRL0_LRCLK_SEL GENMASK(9, 8)
> +#define CTRL0_BLK_CAP_INV BIT(7)
> +#define CTRL0_BCLK_O_INV BIT(6)
> +#define CTRL0_BCLK_SEL GENMASK(5, 4)
> +#define CTRL0_MCLK_SEL GENMASK(2, 0)
> +
> +#define TOACODEC_OUT_CHMAX 2
> +
> +static const char * const g12a_toacodec_mux_texts[] = {
> + "I2S A", "I2S B", "I2S C",
> +};
> +
> +static int g12a_toacodec_get_mux(struct snd_soc_component *component)
> +{
> + unsigned int val;
> +
> + snd_soc_component_read(component, TOACODEC_CTRL0, &val);
> + return FIELD_GET(CTRL0_DAT_SEL, val);
> +}
> +
> +static int g12a_toacodec_put_mux(struct snd_soc_component *component,
> + unsigned int mux)
> +{
> + snd_soc_component_update_bits(component, TOACODEC_CTRL0,
> + CTRL0_DAT_SEL |
> + CTRL0_LRCLK_SEL |
> + CTRL0_BCLK_SEL,
> + FIELD_PREP(CTRL0_DAT_SEL, mux) |
> + FIELD_PREP(CTRL0_LRCLK_SEL, mux) |
> + FIELD_PREP(CTRL0_BCLK_SEL, mux));
> +
> + /*
> + * FIXME:
> + * On this soc, the glue gets the MCLK directly from the clock
> + * controller instead of going the through the TDM interface.
> + *
> + * Here we assume interface A uses clock A, etc ... While it is
> + * true for now, it could be different. Instead the glue should
> + * find out the clock used by the interface and select the same
> + * source. For that, we will need regmap backed clock mux which
> + * is a work in progress
> + */
> + snd_soc_component_update_bits(component, TOACODEC_CTRL0,
> + CTRL0_MCLK_SEL,
> + FIELD_PREP(CTRL0_MCLK_SEL, mux));
> +
> + return 0;
> +}
> +
> +static MESON_CODEC_GLUE_ENUM_DECL(g12a_toacodec_mux_glue,
> + g12a_toacodec_mux_texts,
> + g12a_toacodec_get_mux,
> + g12a_toacodec_put_mux);
> +
> +static const struct snd_kcontrol_new g12a_toacodec_mux =
> + SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
> + snd_soc_dapm_get_enum_double,
> + g12a_toacodec_mux_put_enum);
> +
> +static const struct snd_kcontrol_new g12a_toacodec_out_enable =
> + SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
> + CTRL0_ENABLE_SHIFT, 1, 0);
> +
> +static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
> + SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
> + &g12a_toacodec_mux),
> + SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
> + &g12a_toacodec_out_enable),
> +};
> +
> +static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params,
> + struct snd_soc_dai *dai)
> +{
> + struct meson_codec_glue_input *data;
> + int ret;
> +
> + ret = meson_codec_glue_input_hw_params(substream, params, dai);
> + if (ret)
> + return ret;
> +
> + /* The glue will provide 1 lane out of the 4 to the output */
> + data = meson_codec_glue_input_get_data(dai);
> + data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
> + data->params.channels_min);
> + data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
> + data->params.channels_max);
> +
> + return 0;
> +}
> +
> +static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
> + .hw_params = g12a_toacodec_input_hw_params,
> + .set_fmt = meson_codec_glue_input_set_fmt,
> +};
> +
> +static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
> + .startup = meson_codec_glue_output_startup,
> +};
> +
> +#define TOACODEC_STREAM(xname, xsuffix, xchmax) \
> +{ \
> + .stream_name = xname " " xsuffix, \
> + .channels_min = 1, \
> + .channels_max = (xchmax), \
> + .rate_min = 5512, \
> + .rate_max = 192000, \
> + .formats = AXG_TDM_FORMATS, \
> +}
> +
> +#define TOACODEC_INPUT(xname, xid) { \
> + .name = xname, \
> + .id = (xid), \
> + .playback = TOACODEC_STREAM(xname, "Playback", 8), \
> + .ops = &g12a_toacodec_input_ops, \
> + .probe = meson_codec_glue_input_dai_probe, \
> + .remove = meson_codec_glue_input_dai_remove, \
> +}
> +
> +#define TOACODEC_OUTPUT(xname, xid) { \
> + .name = xname, \
> + .id = (xid), \
> + .capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
> + .ops = &g12a_toacodec_output_ops, \
> +}
> +
> +static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
> + TOACODEC_INPUT("IN A", TOACODEC_IN_A),
> + TOACODEC_INPUT("IN B", TOACODEC_IN_B),
> + TOACODEC_INPUT("IN C", TOACODEC_IN_C),
> + TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
> +};
> +
> +static int g12a_toacodec_component_probe(struct snd_soc_component *c)
> +{
> + /* Initialize the static clock parameters */
> + return snd_soc_component_write(c, TOACODEC_CTRL0,
> + CTRL0_BLK_CAP_INV);
> +}
> +
> +static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
> + { "SRC", "I2S A", "IN A Playback" },
> + { "SRC", "I2S B", "IN B Playback" },
> + { "SRC", "I2S C", "IN C Playback" },
> + { "OUT EN", "Switch", "SRC" },
> + { "OUT Capture", NULL, "OUT EN" },
> +};
> +
> +static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
> + SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
> +};
> +
> +static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
> + .probe = g12a_toacodec_component_probe,
> + .controls = g12a_toacodec_controls,
> + .num_controls = ARRAY_SIZE(g12a_toacodec_controls),
> + .dapm_widgets = g12a_toacodec_widgets,
> + .num_dapm_widgets = ARRAY_SIZE(g12a_toacodec_widgets),
> + .dapm_routes = g12a_toacodec_routes,
> + .num_dapm_routes = ARRAY_SIZE(g12a_toacodec_routes),
> + .endianness = 1,
> + .non_legacy_dai_naming = 1,
> +};
> +
> +static const struct regmap_config g12a_toacodec_regmap_cfg = {
> + .reg_bits = 32,
> + .val_bits = 32,
> + .reg_stride = 4,
> +};
> +
> +static const struct of_device_id g12a_toacodec_of_match[] = {
> + { .compatible = "amlogic,g12a-toacodec", },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
> +
> +static int g12a_toacodec_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + void __iomem *regs;
> + struct regmap *map;
> + int ret;
> +
> + ret = device_reset(dev);
> + if (ret)
> + return ret;
> +
> + regs = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(regs))
> + return PTR_ERR(regs);
> +
> + map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_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_toacodec_component_drv, g12a_toacodec_dai_drv,
> + ARRAY_SIZE(g12a_toacodec_dai_drv));
> +}
> +
> +static struct platform_driver g12a_toacodec_pdrv = {
> + .driver = {
> + .name = G12A_TOACODEC_DRV_NAME,
> + .of_match_table = g12a_toacodec_of_match,
> + },
> + .probe = g12a_toacodec_probe,
> +};
> +module_platform_driver(g12a_toacodec_pdrv);
> +
> +MODULE_AUTHOR("Jerome Brunet <jbrunet@...libre.com>");
> +MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
> +MODULE_LICENSE("GPL v2");
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