ASoC: rt5645: Wait for 400msec before concluding on value of RT5645_VENDOR_ID2

Minimum time required between power On of codec and read
of RT5645_VENDOR_ID2 is 400msec. We should wait that long
before reading the value.

TEST=Cold boot the device and check for sound device.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index 23cc2cb8393f..5f24df4fae8e 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -55,6 +55,8 @@ MODULE_PARM_DESC(quirk, "RT5645 pdata quirk override");
 
 #define RT5645_HWEQ_NUM 57
 
+#define TIME_TO_POWER_MS 400
+
 static const struct regmap_range_cfg rt5645_ranges[] = {
         {
                 .name = "PR",
@@ -3784,6 +3786,12 @@ static int rt5645_i2c_probe(struct i2c_client *i2c,
                         ret);
                 return ret;
         }
+
+        /*
+         * Read after 400msec, as it is the interval required between
+         * read and power On.
+         */
+        msleep(TIME_TO_POWER_MS);
         regmap_read(regmap, RT5645_VENDOR_ID2, &val);
 
         switch (val) {