[PATCH v2 2/2] 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 397083ee5b37..bba638e1eb6a 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>
@@ -19,6 +20,7 @@
 
 struct rt1015p_priv {
 	struct gpio_desc *sdb;
+	bool calib_done;
 };
 
 static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w,
@@ -36,6 +38,11 @@ static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w,
 	case SND_SOC_DAPM_PRE_PMU:
 		gpiod_set_value(rt1015p->sdb, 1);
 		dev_dbg(component->dev, "set sdb to 1");
+
+		if (!rt1015p->calib_done) {
+			msleep(300);
+			rt1015p->calib_done = true;
+		}
 		break;
 	case SND_SOC_DAPM_POST_PMD:
 		gpiod_set_value(rt1015p->sdb, 0);
-- 
2.29.2.576.ga3fc446d84-goog