[PATCH] ASoC: cs35l56: Log SoundWire status updates only on changes

[Richard Fitzgerald <rf@opensource.cirrus.com>]

From: Simon Trimmer <simont@opensource.cirrus.com>

The SoundWire slave update_status() callback can be invoked when the
status has not changed. To prevent large amounts of log noise with debug
enabled, log them only when the status changes. This also helps with
understanding them, because they now log an actual change in state.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 sound/soc/codecs/cs35l56-sdw.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/cs35l56-sdw.c b/sound/soc/codecs/cs35l56-sdw.c
index 105d38b1c187..d5b9e5f71de2 100644
--- a/sound/soc/codecs/cs35l56-sdw.c
+++ b/sound/soc/codecs/cs35l56-sdw.c
@@ -385,18 +385,19 @@ static int cs35l56_sdw_update_status(struct sdw_slave *peripheral,
 
 	switch (status) {
 	case SDW_SLAVE_ATTACHED:
-		dev_dbg(cs35l56->base.dev, "%s: ATTACHED\n", __func__);
 		cs35l56->sdw_in_clock_stop_1 = false;
 		if (cs35l56->sdw_attached)
 			break;
 
+		dev_dbg(cs35l56->base.dev, "%s: ATTACHED\n", __func__);
 		if (!cs35l56->base.init_done || cs35l56->soft_resetting)
 			cs35l56_sdw_init(peripheral);
 
 		cs35l56->sdw_attached = true;
 		break;
 	case SDW_SLAVE_UNATTACHED:
-		dev_dbg(cs35l56->base.dev, "%s: UNATTACHED\n", __func__);
+		if (cs35l56->sdw_attached)
+			dev_dbg(cs35l56->base.dev, "%s: UNATTACHED\n", __func__);
 		cs35l56->sdw_attached = false;
 		break;
 	default:
-- 
2.47.3