316 lines
8.2 KiB
C
316 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Rockchip machine ASoC driver for Rockchip HDMI audio
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*
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* Copyright (C) 2021 Rockchip Electronics Co., Ltd.
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*
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* Authors: XiaoTan Luo <lxt@rock-chips.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/jack.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#define DRV_NAME "rk-hdmi-sound"
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#define MAX_CODECS 2
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#define DEFAULT_MCLK_FS 256
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struct rk_hdmi_data {
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struct snd_soc_card card;
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struct snd_soc_dai_link dai;
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struct snd_soc_jack hdmi_jack;
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struct snd_soc_jack_pin hdmi_jack_pin;
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unsigned int mclk_fs;
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bool jack_det;
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};
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static int rk_hdmi_fill_widget_info(struct device *dev,
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struct snd_soc_dapm_widget *w, enum snd_soc_dapm_type id,
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void *priv, const char *wname, const char *stream,
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struct snd_kcontrol_new *wc, int numkc,
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int (*event)(struct snd_soc_dapm_widget *,
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struct snd_kcontrol *, int), unsigned short event_flags)
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{
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w->id = id;
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w->name = devm_kstrdup(dev, wname, GFP_KERNEL);
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if (!w->name)
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return -ENOMEM;
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w->sname = stream;
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w->reg = SND_SOC_NOPM;
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w->shift = 0;
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w->kcontrol_news = wc;
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w->num_kcontrols = numkc;
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w->priv = priv;
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w->event = event;
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w->event_flags = event_flags;
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return 0;
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}
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static int rk_dailink_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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struct snd_soc_card *card = rtd->card;
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struct rk_hdmi_data *rk_data = snd_soc_card_get_drvdata(rtd->card);
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struct device *dev = rtd->card->dev;
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int ret = 0;
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struct snd_soc_dapm_widget *widgets;
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if (!rk_data->jack_det)
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return 0;
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widgets = devm_kcalloc(card->dapm.dev, 1,
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sizeof(*widgets), GFP_KERNEL);
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if (!widgets)
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return -ENOMEM;
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ret = rk_hdmi_fill_widget_info(card->dapm.dev, widgets,
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snd_soc_dapm_line, NULL,
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rk_data->hdmi_jack_pin.pin,
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NULL, NULL, 0, NULL, 0);
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if (ret < 0)
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return ret;
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ret = snd_soc_dapm_new_controls(&card->dapm, widgets, 1);
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if (ret < 0)
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return ret;
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ret = snd_soc_dapm_new_widgets(rtd->card);
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if (ret < 0)
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return ret;
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ret = snd_soc_card_jack_new_pins(rtd->card,
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rk_data->hdmi_jack_pin.pin,
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rk_data->hdmi_jack_pin.mask,
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&rk_data->hdmi_jack,
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&rk_data->hdmi_jack_pin, 1);
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if (ret) {
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dev_err(dev, "Can't new HDMI Jack %d\n", ret);
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return ret;
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}
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return snd_soc_component_set_jack(codec_dai->component,
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&rk_data->hdmi_jack, NULL);
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}
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static int rk_hdmi_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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struct rk_hdmi_data *rk_data = snd_soc_card_get_drvdata(rtd->card);
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unsigned int mclk;
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int ret;
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mclk = params_rate(params) * rk_data->mclk_fs;
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ret = snd_soc_dai_set_sysclk(codec_dai, substream->stream, mclk,
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SND_SOC_CLOCK_IN);
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if (ret && ret != -ENOTSUPP) {
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dev_err(codec_dai->dev,
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"Set codec_dai sysclk failed: %d\n", ret);
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return ret;
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}
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ret = snd_soc_dai_set_sysclk(cpu_dai, substream->stream, mclk,
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SND_SOC_CLOCK_OUT);
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if (ret && ret != -ENOTSUPP) {
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dev_err(cpu_dai->dev,
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"Set cpu_dai sysclk failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static const struct snd_soc_ops rk_ops = {
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.hw_params = rk_hdmi_hw_params,
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};
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static unsigned int rk_hdmi_parse_daifmt(struct device_node *node,
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struct device_node *codec,
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char *prefix)
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{
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struct device_node *bitclkmaster = NULL;
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struct device_node *framemaster = NULL;
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unsigned int daifmt;
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daifmt = snd_soc_daifmt_parse_format(node, prefix);
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snd_soc_daifmt_parse_clock_provider_as_phandle(node, prefix, &bitclkmaster, &framemaster);
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if (!bitclkmaster && !framemaster) {
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/*
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* No dai-link level and master setting was not found from
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* sound node level, revert back to legacy DT parsing and
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* take the settings from codec node.
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*/
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pr_debug("%s: Revert to legacy daifmt parsing\n", __func__);
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daifmt |= snd_soc_daifmt_parse_clock_provider_as_flag(codec, NULL);
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} else {
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daifmt |= snd_soc_daifmt_clock_provider_from_bitmap(
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((codec == bitclkmaster) << 4) | (codec == framemaster));
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}
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/*
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* If there is NULL format means that the format isn't specified, we
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* need to set i2s format by default.
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*/
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if (!(daifmt & SND_SOC_DAIFMT_FORMAT_MASK))
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daifmt |= SND_SOC_DAIFMT_I2S;
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of_node_put(bitclkmaster);
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of_node_put(framemaster);
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return daifmt;
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}
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static int rk_hdmi_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct snd_soc_dai_link_component *codecs;
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struct snd_soc_dai_link_component *platforms;
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struct snd_soc_dai_link_component *cpus;
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struct of_phandle_args args;
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struct device_node *cpu_np;
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struct rk_hdmi_data *rk_data;
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int count;
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u32 val;
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int ret = 0, i = 0, idx = 0;
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rk_data = devm_kzalloc(&pdev->dev, sizeof(*rk_data), GFP_KERNEL);
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if (!rk_data)
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return -ENOMEM;
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cpus = devm_kzalloc(&pdev->dev, sizeof(*cpus), GFP_KERNEL);
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if (!cpus)
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return -ENOMEM;
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platforms = devm_kzalloc(&pdev->dev, sizeof(*platforms), GFP_KERNEL);
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if (!platforms)
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return -ENOMEM;
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rk_data->card.dev = &pdev->dev;
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rk_data->dai.init = &rk_dailink_init;
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rk_data->dai.ops = &rk_ops;
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rk_data->dai.cpus = cpus;
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rk_data->dai.platforms = platforms;
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rk_data->dai.num_cpus = 1;
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rk_data->dai.num_platforms = 1;
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/* Parse the card name from DT */
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ret = snd_soc_of_parse_card_name(&rk_data->card, "rockchip,card-name");
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if (ret < 0)
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return ret;
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rk_data->dai.name = rk_data->card.name;
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rk_data->dai.stream_name = rk_data->card.name;
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count = of_count_phandle_with_args(np, "rockchip,codec", "#sound-dai-cells");
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if (count < 0 || count > MAX_CODECS)
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return -EINVAL;
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/* refine codecs, remove unavailable node */
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for (i = 0; i < count; i++) {
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ret = of_parse_phandle_with_args(np, "rockchip,codec", "#sound-dai-cells", i, &args);
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if (ret) {
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dev_err(&pdev->dev, "error getting codec phandle index %d\n", i);
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return -ENODEV;
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}
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if (of_device_is_available(args.np))
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idx++;
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of_node_put(args.np);
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}
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if (!idx)
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return -ENODEV;
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codecs = devm_kcalloc(&pdev->dev, idx,
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sizeof(*codecs), GFP_KERNEL);
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if (!codecs)
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return -ENOMEM;
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rk_data->dai.codecs = codecs;
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rk_data->dai.num_codecs = idx;
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idx = 0;
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for (i = 0; i < count; i++) {
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ret = of_parse_phandle_with_args(np, "rockchip,codec", "#sound-dai-cells", i, &args);
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if (ret) {
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dev_err(&pdev->dev, "error getting codec phandle index %d\n", i);
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return -ENODEV;
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}
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if (!of_device_is_available(args.np)) {
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of_node_put(args.np);
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continue;
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}
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codecs[idx].of_node = args.np;
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ret = snd_soc_get_dai_name(&args, &codecs[idx].dai_name);
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if (ret)
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return ret;
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idx++;
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}
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cpu_np = of_parse_phandle(np, "rockchip,cpu", 0);
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if (!cpu_np)
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return -ENODEV;
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rk_data->dai.dai_fmt = rk_hdmi_parse_daifmt(np, codecs[0].of_node, "rockchip,");
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rk_data->mclk_fs = DEFAULT_MCLK_FS;
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if (!of_property_read_u32(np, "rockchip,mclk-fs", &val))
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rk_data->mclk_fs = val;
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rk_data->jack_det =
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of_property_read_bool(np, "rockchip,jack-det");
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rk_data->dai.cpus->of_node = cpu_np;
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rk_data->dai.platforms->of_node = cpu_np;
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of_node_put(cpu_np);
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rk_data->hdmi_jack_pin.pin = rk_data->card.name;
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rk_data->hdmi_jack_pin.mask = SND_JACK_LINEOUT;
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rk_data->card.num_links = 1;
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rk_data->card.owner = THIS_MODULE;
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rk_data->card.dai_link = &rk_data->dai;
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snd_soc_card_set_drvdata(&rk_data->card, rk_data);
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ret = devm_snd_soc_register_card(&pdev->dev, &rk_data->card);
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if (ret == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (ret) {
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dev_err(&pdev->dev, "card register failed %d\n", ret);
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return ret;
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}
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platform_set_drvdata(pdev, &rk_data->card);
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return ret;
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}
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static const struct of_device_id rockchip_sound_of_match[] = {
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{ .compatible = "rockchip,hdmi", },
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{},
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};
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MODULE_DEVICE_TABLE(of, rockchip_sound_of_match);
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static struct platform_driver rockchip_sound_driver = {
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.probe = rk_hdmi_probe,
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.driver = {
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.name = DRV_NAME,
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.pm = &snd_soc_pm_ops,
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.of_match_table = rockchip_sound_of_match,
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},
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};
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module_platform_driver(rockchip_sound_driver);
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MODULE_AUTHOR("XiaoTan Luo <lxt@rock-chips.com>");
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MODULE_DESCRIPTION("Rockchip HDMI ASoC machine driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:" DRV_NAME);
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