[PATCH 5.15.y 4/4] ASoC: codecs: wsa881x: fix unnecessary initialisation

[Sasha Levin <sashal@kernel.org>]

From: Johan Hovold <johan@kernel.org>

[ Upstream commit 29d71b8a5a40708b3eed9ba4953bfc2312c9c776 ]

The soundwire update_status() callback may be called multiple times with
the same ATTACHED status but initialisation should only be done when
transitioning from UNATTACHED to ATTACHED.

Fixes: a0aab9e1404a ("ASoC: codecs: add wsa881x amplifier support")
Cc: stable@vger.kernel.org	# 5.6
Cc: Srinivas Kandagatla <srini@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Link: https://patch.msgid.link/20260102111413.9605-3-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/soc/codecs/wsa881x.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/codecs/wsa881x.c b/sound/soc/codecs/wsa881x.c
index 80625efc2fc7e..22c382f0c68bf 100644
--- a/sound/soc/codecs/wsa881x.c
+++ b/sound/soc/codecs/wsa881x.c
@@ -682,6 +682,7 @@ struct wsa881x_priv {
 	 */
 	unsigned int sd_n_val;
 	int active_ports;
+	bool hw_init;
 	bool port_prepared[WSA881X_MAX_SWR_PORTS];
 	bool port_enable[WSA881X_MAX_SWR_PORTS];
 };
@@ -691,6 +692,9 @@ static void wsa881x_init(struct wsa881x_priv *wsa881x)
 	struct regmap *rm = wsa881x->regmap;
 	unsigned int val = 0;
 
+	if (wsa881x->hw_init)
+		return;
+
 	regmap_register_patch(wsa881x->regmap, wsa881x_rev_2_0,
 			      ARRAY_SIZE(wsa881x_rev_2_0));
 
@@ -728,6 +732,8 @@ static void wsa881x_init(struct wsa881x_priv *wsa881x)
 	regmap_update_bits(rm, WSA881X_OTP_REG_28, 0x3F, 0x3A);
 	regmap_update_bits(rm, WSA881X_BONGO_RESRV_REG1, 0xFF, 0xB2);
 	regmap_update_bits(rm, WSA881X_BONGO_RESRV_REG2, 0xFF, 0x05);
+
+	wsa881x->hw_init = true;
 }
 
 static int wsa881x_component_probe(struct snd_soc_component *comp)
@@ -1064,6 +1070,9 @@ static int wsa881x_update_status(struct sdw_slave *slave,
 {
 	struct wsa881x_priv *wsa881x = dev_get_drvdata(&slave->dev);
 
+	if (status == SDW_SLAVE_UNATTACHED)
+		wsa881x->hw_init = false;
+
 	if (status == SDW_SLAVE_ATTACHED && slave->dev_num > 0)
 		wsa881x_init(wsa881x);
 
-- 
2.51.0