Re: [v3 10/19] ASoC: mediatek: mt8186: support tdm in platform driver
From: AngeloGioacchino Del Regno
Date: Mon Mar 14 2022 - 06:39:21 EST
Il 13/03/22 16:10, Jiaxin Yu ha scritto:
Add mt8186 tdm dai driver.
Signed-off-by: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
---
sound/soc/mediatek/mt8186/mt8186-dai-tdm.c | 695 +++++++++++++++++++++
1 file changed, 695 insertions(+)
create mode 100644 sound/soc/mediatek/mt8186/mt8186-dai-tdm.c
diff --git a/sound/soc/mediatek/mt8186/mt8186-dai-tdm.c b/sound/soc/mediatek/mt8186/mt8186-dai-tdm.c
new file mode 100644
index 000000000000..52acc5f6e147
--- /dev/null
+++ b/sound/soc/mediatek/mt8186/mt8186-dai-tdm.c
@@ -0,0 +1,695 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// MediaTek ALSA SoC Audio DAI TDM Control
+//
+// Copyright (c) 2022 MediaTek Inc.
+// Author: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
+
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+
+#include "mt8186-afe-clk.h"
+#include "mt8186-afe-common.h"
+#include "mt8186-afe-gpio.h"
+#include "mt8186-interconnection.h"
+
+#define TDM_HD_EN_W_NAME "TDM_HD_EN"
+#define TDM_MCLK_EN_W_NAME "TDM_MCLK_EN"
+#define MTK_AFE_TDM_KCONTROL_NAME "TDM_HD_Mux"
+
+struct mtk_afe_tdm_priv {
+ unsigned int id;
+ unsigned int rate; /* for determine which apll to use */
+ unsigned int bck_invert;
+ unsigned int lck_invert;
+ unsigned int lrck_width;
+ unsigned int mclk_id;
+ unsigned int mclk_multiple; /* according to sample rate */
+ unsigned int mclk_rate;
+ unsigned int mclk_apll;
+ unsigned int tdm_mode;
+ unsigned int data_mode;
+ unsigned int slave_mode;
+ unsigned int low_jitter_en;
+};
+
+enum {
+ TDM_IN_I2S = 0,
+ TDM_IN_LJ = 1,
+ TDM_IN_RJ = 2,
+ TDM_IN_DSP_A = 4,
+ TDM_IN_DSP_B = 5,
+};
+
+enum {
+ TDM_DATA_ONE_PIN = 0,
+ TDM_DATA_MULTI_PIN,
+};
+
+enum {
+ TDM_BCK_NON_INV = 0,
+ TDM_BCK_INV = 1,
+};
+
+enum {
+ TDM_LCK_NON_INV = 0,
+ TDM_LCK_INV = 1,
+};
+
+static unsigned int get_tdm_lrck_width(snd_pcm_format_t format,
+ unsigned int mode)
+{
+ if (mode == TDM_IN_DSP_A || mode == TDM_IN_DSP_B)
+ return 0;
+
+ return snd_pcm_format_physical_width(format) - 1;
+}
+
+static unsigned int get_tdm_ch_fixup(unsigned int channels)
+{
+ if (channels > 4)
+ return 8;
+ else if (channels > 2)
+ return 4;
+
+ return 2;
+}
+
+static unsigned int get_tdm_ch_per_sdata(unsigned int mode,
+ unsigned int channels)
+{
+ if (mode == TDM_IN_DSP_A || mode == TDM_IN_DSP_B)
+ return get_tdm_ch_fixup(channels);
+
+ return 2;
+}
+
+enum {
+ SUPPLY_SEQ_APLL,
+ SUPPLY_SEQ_TDM_MCK_EN,
+ SUPPLY_SEQ_TDM_HD_EN,
+ SUPPLY_SEQ_TDM_EN,
+};
+
+static int get_tdm_id_by_name(const char *name)
+{
+ return MT8186_DAI_TDM_IN;
+}
+
+static int mtk_tdm_en_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol,
+ int event)
+{
+ struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(w->name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+
+ if (!tdm_priv) {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return -EINVAL;
+ }
+
+ dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x\n",
+ __func__, w->name, event);
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ mt8186_afe_gpio_request(afe->dev, true, tdm_priv->id, 0);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ mt8186_afe_gpio_request(afe->dev, false, tdm_priv->id, 0);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int mtk_tdm_mck_en_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol,
+ int event)
+{
+ struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(w->name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+
+ if (!tdm_priv) {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return -EINVAL;
+ }
+
+ dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x, dai_id %d\n",
+ __func__, w->name, event, dai_id);
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ mt8186_mck_enable(afe, tdm_priv->mclk_id, tdm_priv->mclk_rate);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ tdm_priv->mclk_rate = 0;
+ mt8186_mck_disable(afe, tdm_priv->mclk_id);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/* dai component */
+/* tdm virtual mux to output widget */
+static const char * const tdm_mux_map[] = {
+ "Normal", "Dummy_Widget",
+};
+
+static int tdm_mux_map_value[] = {
+ 0, 1,
+};
+
+static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(tdm_mux_map_enum,
+ SND_SOC_NOPM,
+ 0,
+ 1,
+ tdm_mux_map,
+ tdm_mux_map_value);
+
+static const struct snd_kcontrol_new tdm_in_mux_control =
+ SOC_DAPM_ENUM("TDM In Select", tdm_mux_map_enum);
+
+static const struct snd_soc_dapm_widget mtk_dai_tdm_widgets[] = {
+ SND_SOC_DAPM_CLOCK_SUPPLY("aud_tdm_clk"),
+
+ SND_SOC_DAPM_SUPPLY_S("TDM_EN", SUPPLY_SEQ_TDM_EN,
+ ETDM_IN1_CON0, ETDM_IN1_CON0_REG_ETDM_IN_EN_SFT,
+ 0, mtk_tdm_en_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ /* tdm hd en */
+ SND_SOC_DAPM_SUPPLY_S(TDM_HD_EN_W_NAME, SUPPLY_SEQ_TDM_HD_EN,
+ ETDM_IN1_CON2, ETDM_IN1_CON2_REG_CLOCK_SOURCE_SEL_SFT,
+ 0, NULL,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+
+ SND_SOC_DAPM_SUPPLY_S(TDM_MCLK_EN_W_NAME, SUPPLY_SEQ_TDM_MCK_EN,
+ SND_SOC_NOPM, 0, 0,
+ mtk_tdm_mck_en_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+
+ SND_SOC_DAPM_INPUT("TDM_DUMMY_IN"),
+
+ SND_SOC_DAPM_MUX("TDM_In_Mux",
+ SND_SOC_NOPM, 0, 0, &tdm_in_mux_control),
+};
+
+static int mtk_afe_tdm_mclk_connect(struct snd_soc_dapm_widget *source,
+ struct snd_soc_dapm_widget *sink)
+{
+ struct snd_soc_dapm_widget *w = sink;
+ struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(w->name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+
+ if (!tdm_priv) {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return 0;
+ }
+
+ return (tdm_priv->mclk_rate > 0) ? 1 : 0;
+}
+
+static int mtk_afe_tdm_mclk_apll_connect(struct snd_soc_dapm_widget *source,
+ struct snd_soc_dapm_widget *sink)
+{
+ struct snd_soc_dapm_widget *w = sink;
+ struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(w->name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+ int cur_apll;
+
+ /* which apll */
+ cur_apll = mt8186_get_apll_by_name(afe, source->name);
+
+ return (tdm_priv->mclk_apll == cur_apll) ? 1 : 0;
+}
+
+static int mtk_afe_tdm_hd_connect(struct snd_soc_dapm_widget *source,
+ struct snd_soc_dapm_widget *sink)
+{
+ struct snd_soc_dapm_widget *w = sink;
+ struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(w->name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+
+ if (!tdm_priv) {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return 0;
+ }
+
+ return tdm_priv->low_jitter_en;
+}
+
+static int mtk_afe_tdm_apll_connect(struct snd_soc_dapm_widget *source,
+ struct snd_soc_dapm_widget *sink)
+{
+ struct snd_soc_dapm_widget *w = sink;
+ struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(w->name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+ int cur_apll;
+ int tdm_need_apll;
+
+ if (!tdm_priv) {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return 0;
+ }
+
+ /* which apll */
+ cur_apll = mt8186_get_apll_by_name(afe, source->name);
+
+ /* choose APLL from tdm rate */
+ tdm_need_apll = mt8186_get_apll_by_rate(afe, tdm_priv->rate);
+
+ return (tdm_need_apll == cur_apll) ? 1 : 0;
+}
+
+/* low jitter control */
+static const char * const mt8186_tdm_hd_str[] = {
+ "Normal", "Low_Jitter"
+};
+
+static const struct soc_enum mt8186_tdm_enum[] = {
+ SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(mt8186_tdm_hd_str),
+ mt8186_tdm_hd_str),
+};
+
+static int mt8186_tdm_hd_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(kcontrol->id.name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+
+ if (!tdm_priv) {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return -EINVAL;
+ }
+
+ ucontrol->value.integer.value[0] = tdm_priv->low_jitter_en;
+
+ return 0;
+}
+
+static int mt8186_tdm_hd_set(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+ struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int dai_id = get_tdm_id_by_name(kcontrol->id.name);
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[dai_id];
+ struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ int hd_en;
+
+ if (ucontrol->value.enumerated.item[0] >= e->items)
+ return -EINVAL;
+
+ hd_en = ucontrol->value.integer.value[0];
+
+ dev_dbg(afe->dev, "%s(), kcontrol name %s, hd_en %d\n",
+ __func__, kcontrol->id.name, hd_en);
+
+ if (!tdm_priv) {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return -EINVAL;
+ }
+
+ tdm_priv->low_jitter_en = hd_en;
+
+ return 0;
+}
+
+static const struct snd_kcontrol_new mtk_dai_tdm_controls[] = {
+ SOC_ENUM_EXT(MTK_AFE_TDM_KCONTROL_NAME, mt8186_tdm_enum[0],
+ mt8186_tdm_hd_get, mt8186_tdm_hd_set),
+};
+
+static const struct snd_soc_dapm_route mtk_dai_tdm_routes[] = {
+ {"TDM IN", NULL, "aud_tdm_clk"},
+ {"TDM IN", NULL, "TDM_EN"},
+ {"TDM IN", NULL, TDM_HD_EN_W_NAME, mtk_afe_tdm_hd_connect},
+ {TDM_HD_EN_W_NAME, NULL, APLL1_W_NAME, mtk_afe_tdm_apll_connect},
+ {TDM_HD_EN_W_NAME, NULL, APLL2_W_NAME, mtk_afe_tdm_apll_connect},
+
+ {"TDM IN", NULL, TDM_MCLK_EN_W_NAME, mtk_afe_tdm_mclk_connect},
+ {TDM_MCLK_EN_W_NAME, NULL, APLL1_W_NAME, mtk_afe_tdm_mclk_apll_connect},
+ {TDM_MCLK_EN_W_NAME, NULL, APLL2_W_NAME, mtk_afe_tdm_mclk_apll_connect},
+
+ /* allow tdm on without codec on */
+ {"TDM IN", NULL, "TDM_In_Mux"},
+ {"TDM_In_Mux", "Dummy_Widget", "TDM_DUMMY_IN"},
+};
+
+/* dai ops */
+static int mtk_dai_tdm_cal_mclk(struct mtk_base_afe *afe,
+ struct mtk_afe_tdm_priv *tdm_priv,
+ int freq)
+{
+ int apll;
+ int apll_rate;
+
+ apll = mt8186_get_apll_by_rate(afe, freq);
+ apll_rate = mt8186_get_apll_rate(afe, apll);
+
+ if (!freq || freq > apll_rate) {
+ dev_err(afe->dev,
+ "%s(), freq(%d Hz) invalid\n", __func__, freq);
+ return -EINVAL;
+ }
+
+ if (apll_rate % freq != 0) {
+ dev_err(afe->dev,
+ "%s(), APLL cannot generate %d Hz", __func__, freq);
+ return -EINVAL;
+ }
+
+ tdm_priv->mclk_rate = freq;
+ tdm_priv->mclk_apll = apll;
+
+ return 0;
+}
+
+static int mtk_dai_tdm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ struct mt8186_afe_private *afe_priv = afe->platform_priv;
+ int tdm_id = dai->id;
+ struct mtk_afe_tdm_priv *tdm_priv = afe_priv->dai_priv[tdm_id];
+ unsigned int tdm_mode = tdm_priv->tdm_mode;
+ unsigned int data_mode = tdm_priv->data_mode;
+ unsigned int rate = params_rate(params);
+ unsigned int channels = params_channels(params);
+ snd_pcm_format_t format = params_format(params);
+ unsigned int bit_width =
+ snd_pcm_format_physical_width(format);
+ unsigned int tdm_channels = (data_mode == TDM_DATA_ONE_PIN) ?
+ get_tdm_ch_per_sdata(tdm_mode, channels) : 2;
+ unsigned int lrck_width =
+ get_tdm_lrck_width(format, tdm_mode);
+ unsigned int tdm_con = 0;
+ bool slave_mode = tdm_priv->slave_mode;
+ bool lrck_inv = tdm_priv->lck_invert;
+ bool bck_inv = tdm_priv->bck_invert;
+ unsigned int tran_rate;
+ unsigned int tran_relatch_rate;
+
+ if (tdm_priv)
+ tdm_priv->rate = rate;
+ else {
+ dev_err(afe->dev, "%s(), tdm_priv == NULL", __func__);
+ return -EINVAL;
+ }
This can be simpler:
if (!tdm_priv) {
dev_err ....
return -EINVAL;
}
tdm_priv->rate = rate;
...with that fixed:
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>