linux-kernel - [PATCH 3/5] ASoC: cs35l56: Wait for init_complete in cs35l56_component

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Date:   Fri, 14 Apr 2023 14:37:51 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Simon Trimmer <simont@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH 3/5] ASoC: cs35l56: Wait for init_complete in cs35l56_component_probe()

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

Moving the wait from the beginning of the cs35l56_dsp_work() into
cs35l56_component_probe() will prevent the limbo situation that is an
artifact of the two stage SoundWire driver probe and initialisation
where the card is all registered and shows in ALSA but doesn't actually
work because the hardware didn't enumerate.

The other bus drivers perform the probe and init sequentially and are
not susceptible to this issue.

Signed-off-by: Simon Trimmer <simont@...nsource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 sound/soc/codecs/cs35l56.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c
index d60095162bfa..ab2e663af6c2 100644
--- a/sound/soc/codecs/cs35l56.c
+++ b/sound/soc/codecs/cs35l56.c
@@ -875,13 +875,6 @@ static void cs35l56_dsp_work(struct work_struct *work)
 	unsigned int val;
 	int ret = 0;
 
-	if (!cs35l56->init_done &&
-	    !wait_for_completion_timeout(&cs35l56->init_completion,
-					 msecs_to_jiffies(5000))) {
-		dev_err(cs35l56->dev, "%s: init_completion timed out\n", __func__);
-		goto complete;
-	}
-
 	if (!cs35l56->init_done)
 		goto complete;
 
@@ -980,6 +973,12 @@ static int cs35l56_component_probe(struct snd_soc_component *component)
 
 	BUILD_BUG_ON(ARRAY_SIZE(cs35l56_tx_input_texts) != ARRAY_SIZE(cs35l56_tx_input_values));
 
+	if (!wait_for_completion_timeout(&cs35l56->init_completion,
+					 msecs_to_jiffies(5000))) {
+		dev_err(cs35l56->dev, "%s: init_completion timed out\n", __func__);
+		return -ENODEV;
+	}
+
 	cs35l56->component = component;
 	wm_adsp2_component_probe(&cs35l56->dsp, component);
 
-- 
2.30.2