From 995c17c160dd27461eb2d11de1a59f1c7bcef805 Mon Sep 17 00:00:00 2001
From: "peter.yang" <turmary@126.com>
Date: Tue, 30 Jan 2018 19:12:47 +0800
Subject: [PATCH] Add: export start-clock interface in ac101 to simple-card

---
 ac101.c       | 30 ++++++++++++++++++++++++++----
 simple-card.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 4 deletions(-)

diff --git a/ac101.c b/ac101.c
index 812636b..b82b566 100644
--- a/ac101.c
+++ b/ac101.c
@@ -107,6 +107,7 @@ struct ac10x_priv {
 
 	struct gpio_desc* gpiod_spk_amp_switch;
 };
+static struct ac10x_priv* static_ac10x;
 
 void get_configuration(void)
 {
@@ -391,9 +392,15 @@ static int late_enable_dac(struct snd_soc_codec* codec, int event) {
 		ac10x->dac_enable++;
 		break;
 	case SND_SOC_DAPM_POST_PMD:
+		#if 0
 		if (ac10x->dac_enable > 0){
 			ac10x->dac_enable--;
-			if (ac10x->dac_enable == 0){
+		#else
+		{
+		#endif
+			if (ac10x->dac_enable != 0){
+				ac10x->dac_enable = 0;
+
 				snd_soc_update_bits(codec, DAC_DIG_CTRL, (0x1<<ENHPF),(0x0<<ENHPF));
 				snd_soc_update_bits(codec, DAC_DIG_CTRL, (0x1<<ENDA), (0x0<<ENDA));
 				/*disable dac module clk*/
@@ -518,9 +525,15 @@ static int ac10x_aif1clk(struct snd_soc_codec* codec, int event) {
 
 		break;
 	case SND_SOC_DAPM_POST_PMD:
+		#if 0
 		if (ac10x->aif1_clken > 0){
 			ac10x->aif1_clken--;
 			if (ac10x->aif1_clken == 0){
+		#else
+		{
+			if (ac10x->aif1_clken != 0) {
+				ac10x->aif1_clken = 0;
+		#endif
 				/*disable AIF1CLK*/
 				snd_soc_update_bits(codec, SYSCLK_CTRL, (0x1<<AIF1CLK_ENA), (0x0<<AIF1CLK_ENA));
 				snd_soc_update_bits(codec, MOD_CLK_ENA, (0x1<<MOD_CLK_AIF1), (0x0<<MOD_CLK_AIF1));
@@ -1394,9 +1407,11 @@ static int ac10x_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 	reg_val &= ~(0x1<<AIF1_MSTR_MOD);
 	switch(fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 		case SND_SOC_DAIFMT_CBM_CFM:   /* codec clk & frm master, ap is slave*/
+			pr_warn("AC101 as Master\n");
 			reg_val |= (0x0<<AIF1_MSTR_MOD);
 			break;
 		case SND_SOC_DAIFMT_CBS_CFS:   /* codec clk & frm slave, ap is master*/
+			pr_warn("AC101 as Slave\n");
 			reg_val |= (0x1<<AIF1_MSTR_MOD);
 			break;
 		default:
@@ -1405,7 +1420,7 @@ static int ac10x_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 	}
 
 	/*
-	 * Disable TDM mode
+	 * Enable TDM mode
 	 */
 	reg_val |=  (0x1 << AIF1_TDMM_ENA);
 	// reg_val &= ~(0x1 << AIF1_TDMM_ENA);
@@ -1559,7 +1574,7 @@ static int ac10x_set_bias_level(struct snd_soc_codec *codec,
 /*
  * due to miss channels order in cpu_dai, we meed defer the clock starting.
  */
-static void ac10x_work_start_clock(struct work_struct *work) {
+static void __ac10x_work_start_clock(struct work_struct *work) {
 	struct ac10x_priv *ac10x = container_of(work, struct ac10x_priv, dlywork.work);
 
 	/* enable global clock */
@@ -1570,6 +1585,12 @@ static void ac10x_work_start_clock(struct work_struct *work) {
 	return;
 }
 
+int ac10x_start_clock(void) {
+	ac10x_aif1clk(static_ac10x->codec, SND_SOC_DAPM_PRE_PMU);
+	return 0;
+}
+EXPORT_SYMBOL(ac10x_start_clock);
+
 static int ac10x_trigger(struct snd_pcm_substream *substream, int cmd,
 			     struct snd_soc_dai *dai)
 {
@@ -1750,7 +1771,7 @@ static int ac10x_codec_probe(struct snd_soc_codec *codec)
 	}
 	ac10x->codec = codec;
 
-	INIT_DELAYED_WORK(&ac10x->dlywork, ac10x_work_start_clock);
+	INIT_DELAYED_WORK(&ac10x->dlywork, __ac10x_work_start_clock);
 	INIT_WORK(&ac10x->codec_resume, codec_resume_work);
 	ac10x->dac_enable = 0;
 	ac10x->adc_enable = 0;
@@ -1884,6 +1905,7 @@ static int ac10x_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 		return -ENOMEM;
 	}
 	i2c_set_clientdata(i2c, ac10x);
+	static_ac10x = ac10x;
 
 	ac10x->regmap = devm_regmap_init_i2c(i2c, &ac101_regmap);
 	if (IS_ERR(ac10x->regmap)) {
diff --git a/simple-card.c b/simple-card.c
index 618e7f9..2f991bf 100644
--- a/simple-card.c
+++ b/simple-card.c
@@ -8,6 +8,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+#undef DEBUG
 #include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/gpio.h>
@@ -194,10 +195,41 @@ err:
 	return ret;
 }
 
+extern int ac10x_start_clock(void);
+
+static int asoc_simple_card_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
+
+	int ret = 0;
+
+	printk("%s() stream=%d  cmd=%d\n",
+		__FUNCTION__, substream->stream, cmd);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		ac10x_start_clock();
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return 0;
+}
+
 static struct snd_soc_ops asoc_simple_card_ops = {
 	.startup = asoc_simple_card_startup,
 	.shutdown = asoc_simple_card_shutdown,
 	.hw_params = asoc_simple_card_hw_params,
+	.trigger = asoc_simple_card_trigger,
 };
 
 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)