[PATCH v2 1/2] ASoC: codecs: wsa885x: Reset registers on teardown for B2B playback

[Prasad Kumpatla <prasad.kumpatla@oss.qualcomm.com>]

During back-to-back speaker playback the PA sometimes fails to enable
because a few I2S/TDM and clock source registers retain their previous
state and are not reprogrammed on the next stream.

Reset the relevant I2S/TDM, clock source and bandgap override registers
in hw_free() so the codec is torn down cleanly and the speaker amplifier
comes up reliably on back-to-back use cases. Move the bandgap override
reset out of set_sysclk() into the teardown path where it belongs.

Signed-off-by: Prasad Kumpatla <prasad.kumpatla@oss.qualcomm.com>
---
 sound/soc/codecs/wsa885x.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/wsa885x.c b/sound/soc/codecs/wsa885x.c
index 1faa8541a872..5ffbf9e89fd9 100644
--- a/sound/soc/codecs/wsa885x.c
+++ b/sound/soc/codecs/wsa885x.c
@@ -896,7 +896,6 @@ static int wsa885x_codec_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 
 	regmap_write(wsa885x->regmap, WSA885X_DIG_CTRL0_SYS_CLK_SEL, 0x00);
 	regmap_write(wsa885x->regmap, WSA885X_DIG_CTRL0_POWER_FSM_CTL1, 0x01);
-	regmap_write(wsa885x->regmap, WSA885X_ANA_TOP_BG_TVP_OVRD_CTL, 0x00);
 
 	return 0;
 }
@@ -1006,6 +1005,16 @@ static int wsa885x_codec_hw_free(struct snd_pcm_substream *substream,
 				 struct snd_soc_dai *dai)
 {
 	static const struct reg_sequence regs[] = {
+		{ WSA885X_DIG_CTRL1_I2S_RESET_CTL, 0x00 },
+		{ WSA885X_DIG_CTRL1_I2S_CFG0_TDM_TX, 0x00 },
+		{ WSA885X_DIG_CTRL1_I2S_CFG1_TDM_TX, 0x00 },
+		{ WSA885X_DIG_CTRL1_I2S_TDM_CTL1, 0x05 },
+		{ WSA885X_DIG_CTRL1_I2S_TDM_CTL0, 0x00 },
+		{ WSA885X_DIG_CTRL1_I2S_TDM_CH_TX, 0x00 },
+		{ WSA885X_DIG_CTRL1_I2S_CTL0, 0x06 },
+		{ WSA885X_DIG_CTRL1_I2S_TDM_CH_RX, 0x08 },
+		{ WSA885X_DIG_CTRL0_CLK_SOURCE_ENABLE, 0x00 },
+		{ WSA885X_ANA_TOP_BG_TVP_OVRD_CTL, 0x00 },
 		{ WSA885X_DIG_CTRL0_PA_FSM_CTL, 0x00 },
 	};
 	struct wsa885x_priv *wsa885x;
-- 
2.34.1