[PATCH] ASoC: rt1015p: delay 300ms after SDB pulling high for calibration

[Tzung-Bi Shih]

RT1015p needs 300ms delay after SDB pulling high for internal
calibration during the power on sequence.

Delays 300ms right before data sends out to avoid data truncated.

Signed-off-by: Tzung-Bi Shih <tzungbi at google.com>
---
 sound/soc/codecs/rt1015p.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/soc/codecs/rt1015p.c b/sound/soc/codecs/rt1015p.c
index 59bb60682270..515357474eba 100644
--- a/sound/soc/codecs/rt1015p.c
+++ b/sound/soc/codecs/rt1015p.c
@@ -4,6 +4,7 @@
 //
 // Copyright 2020 The Linux Foundation. All rights reserved.
 
+#include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
@@ -20,6 +21,7 @@
 struct rt1015p_priv {
 	struct gpio_desc *sdb;
 	int sdb_switch;
+	bool calib_done;
 };
 
 static int rt1015p_daiops_trigger(struct snd_pcm_substream *substream,
@@ -39,6 +41,11 @@ static int rt1015p_daiops_trigger(struct snd_pcm_substream *substream,
 		if (rt1015p->sdb_switch) {
 			gpiod_set_value(rt1015p->sdb, 1);
 			dev_dbg(component->dev, "set sdb to 1");
+
+			if (!rt1015p->calib_done) {
+				mdelay(300);
+				rt1015p->calib_done = true;
+			}
 		}
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
-- 
2.29.2.576.ga3fc446d84-goog