[PATCH 09/18] ASoC: mediatek: mt8365: Add PCM DAI support

Alexandre Mergnat
2024-02-26T14:04:47Z

Add Pulse Code Modulation Device Audio Interface support for MT8365 SoC.

Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
---
sound/soc/mediatek/mt8365/mt8365-dai-pcm.c | 298 +++++++++++++++++++++++++++++
1 file changed, 298 insertions(+)

diff --git a/sound/soc/mediatek/mt8365/mt8365-dai-pcm.c b/sound/soc/mediatek/mt8365/mt8365-dai-pcm.c
new file mode 100644
index 000000000000..02ee81663e50
--- /dev/null
+++ b/sound/soc/mediatek/mt8365/mt8365-dai-pcm.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mediatek 8365 ALSA SoC Audio DAI PCM Control
+ *
+ * Copyright (c) 2024 MediaTek Inc.
+ * Authors: Jia Zeng <jia.zeng@mediatek.com>
+ * Alexandre Mergnat <amergnat@baylibre.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include "mt8365-afe-clk.h"
+#include "mt8365-afe-common.h"
+
+struct mt8365_pcm_intf_data {
+ bool slave_mode;
+ bool lrck_inv;
+ bool bck_inv;
+ unsigned int format;
+};
+
+/* DAI Drivers */
+
+static void mt8365_dai_enable_pcm1(struct mtk_base_afe *afe)
+{
+ regmap_update_bits(afe->regmap, PCM_INTF_CON1,
+ PCM_INTF_CON1_EN, PCM_INTF_CON1_EN);
+}
+
+static void mt8365_dai_disable_pcm1(struct mtk_base_afe *afe)
+{
+ regmap_update_bits(afe->regmap, PCM_INTF_CON1,
+ PCM_INTF_CON1_EN, 0x0);
+}
+
+static int mt8365_dai_configure_pcm1(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime * const runtime = substream->runtime;
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ struct mt8365_pcm_intf_data *pcm_priv = afe_priv->dai_priv[MT8365_AFE_IO_PCM1];
+ bool slave_mode = pcm_priv->slave_mode;
+ bool lrck_inv = pcm_priv->lrck_inv;
+ bool bck_inv = pcm_priv->bck_inv;
+ unsigned int fmt = pcm_priv->format;
+ unsigned int bit_width = dai->sample_bits;
+ unsigned int val = 0;
+
+ if (!slave_mode) {
+ val |= PCM_INTF_CON1_MASTER_MODE |
+ PCM_INTF_CON1_BYPASS_ASRC;
+
+ if (lrck_inv)
+ val |= PCM_INTF_CON1_SYNC_OUT_INV;
+ if (bck_inv)
+ val |= PCM_INTF_CON1_BCLK_OUT_INV;
+ } else {
+ val |= PCM_INTF_CON1_SLAVE_MODE;
+
+ if (lrck_inv)
+ val |= PCM_INTF_CON1_SYNC_IN_INV;
+ if (bck_inv)
+ val |= PCM_INTF_CON1_BCLK_IN_INV;
+
+ // TODO: add asrc setting
+ }
+
+ val |= FIELD_PREP(PCM_INTF_CON1_FORMAT_MASK, fmt);
+
+ if (fmt == MT8365_PCM_FORMAT_PCMA ||
+ fmt == MT8365_PCM_FORMAT_PCMB)
+ val |= PCM_INTF_CON1_SYNC_LEN(1);
+ else
+ val |= PCM_INTF_CON1_SYNC_LEN(bit_width);
+
+ switch (runtime->rate) {
+ case 48000:
+ val |= PCM_INTF_CON1_FS_48K;
+ break;
+ case 32000:
+ val |= PCM_INTF_CON1_FS_32K;
+ break;
+ case 16000:
+ val |= PCM_INTF_CON1_FS_16K;
+ break;
+ case 8000:
+ val |= PCM_INTF_CON1_FS_8K;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (bit_width > 16)
+ val |= PCM_INTF_CON1_24BIT | PCM_INTF_CON1_64BCK;
+ else
+ val |= PCM_INTF_CON1_16BIT | PCM_INTF_CON1_32BCK;
+
+ val |= PCM_INTF_CON1_EXT_MODEM;
+
+ regmap_update_bits(afe->regmap, PCM_INTF_CON1,
+ PCM_INTF_CON1_CONFIG_MASK, val);
+
+ return 0;
+}
+
+static int mt8365_dai_pcm1_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+
+ if (snd_soc_dai_active(dai))
+ return 0;
+
+ mt8365_afe_enable_main_clk(afe);
+
+ return 0;
+}
+
+static void mt8365_dai_pcm1_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+
+ if (snd_soc_dai_active(dai))
+ return;
+
+ mt8365_dai_disable_pcm1(afe);
+ mt8365_afe_disable_main_clk(afe);
+}
+
+static int mt8365_dai_pcm1_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ int ret;
+
+ if ((snd_soc_dai_stream_active_playback(dai) + snd_soc_dai_stream_active_capture(dai))
+ > 1) {
+ dev_info(afe->dev, "%s '%s' active(%u-%u) already\n",
+ __func__, snd_pcm_stream_str(substream),
+ snd_soc_dai_stream_active_playback(dai),
+ snd_soc_dai_stream_active_capture(dai));
+ return 0;
+ }
+
+ ret = mt8365_dai_configure_pcm1(substream, dai);
+ if (ret)
+ return ret;
+
+ mt8365_dai_enable_pcm1(afe);
+
+ return 0;
+}
+
+static int mt8365_dai_pcm1_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ struct mt8365_pcm_intf_data *pcm_priv = afe_priv->dai_priv[MT8365_AFE_IO_PCM1];
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ pcm_priv->format = MT8365_PCM_FORMAT_I2S;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ pcm_priv->bck_inv = false;
+ pcm_priv->lrck_inv = false;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ pcm_priv->bck_inv = false;
+ pcm_priv->lrck_inv = true;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ pcm_priv->bck_inv = true;
+ pcm_priv->lrck_inv = false;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ pcm_priv->bck_inv = true;
+ pcm_priv->lrck_inv = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ pcm_priv->slave_mode = true;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ pcm_priv->slave_mode = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mt8365_dai_pcm1_ops = {
+ .startup = mt8365_dai_pcm1_startup,
+ .shutdown = mt8365_dai_pcm1_shutdown,
+ .prepare = mt8365_dai_pcm1_prepare,
+ .set_fmt = mt8365_dai_pcm1_set_fmt,
+};
+
+static struct snd_soc_dai_driver mtk_dai_pcm_driver[] = {
+ {
+ .name = "PCM1",
+ .id = MT8365_AFE_IO_PCM1,
+ .playback = {
+ .stream_name = "PCM1 Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000 |
+ SNDRV_PCM_RATE_16000 |
+ SNDRV_PCM_RATE_32000 |
+ SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .capture = {
+ .stream_name = "PCM1 Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000 |
+ SNDRV_PCM_RATE_16000 |
+ SNDRV_PCM_RATE_32000 |
+ SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &mt8365_dai_pcm1_ops,
+ .symmetric_rate = 1,
+ .symmetric_sample_bits = 1,
+ }
+};
+
+/* DAI widget */
+
+static const struct snd_soc_dapm_widget mtk_dai_pcm_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("PCM1 Out"),
+ SND_SOC_DAPM_INPUT("PCM1 In"),
+};
+
+/* DAI route */
+
+static const struct snd_soc_dapm_route mtk_dai_pcm_routes[] = {
+ {"PCM1 Playback", NULL, "O07"},
+ {"PCM1 Playback", NULL, "O08"},
+ {"PCM1 Out", NULL, "PCM1 Playback"},
+
+ {"I09", NULL, "PCM1 Capture"},
+ {"I22", NULL, "PCM1 Capture"},
+ {"PCM1 Capture", NULL, "PCM1 In"},
+};
+
+static int init_pcmif_priv_data(struct mtk_base_afe *afe)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ struct mt8365_pcm_intf_data *pcmif_priv;
+
+ pcmif_priv = devm_kzalloc(afe->dev, sizeof(struct mt8365_pcm_intf_data),
+ GFP_KERNEL);
+ if (!pcmif_priv)
+ return -ENOMEM;
+
+ afe_priv->dai_priv[MT8365_AFE_IO_PCM1] = pcmif_priv;
+ return 0;
+}
+
+int mt8365_dai_pcm_register(struct mtk_base_afe *afe)
+{
+ struct mtk_base_afe_dai *dai;
+
+ dev_dbg(afe->dev, "%s()\n", __func__);
+
+ dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
+ if (!dai)
+ return -ENOMEM;
+
+ list_add(&dai->list, &afe->sub_dais);
+
+ dai->dai_drivers = mtk_dai_pcm_driver;
+ dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_pcm_driver);
+ dai->dapm_widgets = mtk_dai_pcm_widgets;
+ dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_pcm_widgets);
+ dai->dapm_routes = mtk_dai_pcm_routes;
+ dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_pcm_routes);
+
+ return init_pcmif_priv_data(afe);
+}

--
2.25.1