[PATCH 1/2] ASoC: fsl_aud2htx: register platform component before registering cpu dai

There is no defer probe when adding platform component to
snd_soc_pcm_runtime(rtd), the code is in snd_soc_add_pcm_runtime()

snd_soc_register_card()
  -> snd_soc_bind_card()
    -> snd_soc_add_pcm_runtime()
      -> adding cpu dai
      -> adding codec dai
      -> adding platform component.

So if the platform component is not ready at that time, then the
sound card still registered successfully, but platform component
is empty, the sound card can't be used.

As there is defer probe checking for cpu dai component, then register
platform component before cpu dai to avoid such issue.

And the behavior of imx_pcm_dma_init() is same as common
devm_snd_dmaengine_pcm_register(), so use
devm_snd_dmaengine_pcm_register() instead

Signed-off-by: Shengjiu Wang <redacted>
---
 sound/soc/fsl/fsl_aud2htx.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_aud2htx.c b/sound/soc/fsl/fsl_aud2htx.c
index 873295f59ad7..bc1b9c6df95c 100644
--- a/sound/soc/fsl/fsl_aud2htx.c
+++ b/sound/soc/fsl/fsl_aud2htx.c

@@ -234,6 +234,16 @@ static int fsl_aud2htx_probe(struct platform_device *pdev)
 
 	regcache_cache_only(aud2htx->regmap, true);
 
+	/*
+	 * Register platform component before registering cpu dai for there
+	 * is not defer probe for platform component in snd_soc_add_pcm_runtime().
+	 */
+	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to pcm register\n");
+		return ret;
+	}
+
 	ret = devm_snd_soc_register_component(&pdev->dev,
 					      &fsl_aud2htx_component,
 					      &fsl_aud2htx_dai, 1);

@@ -242,10 +252,6 @@ static int fsl_aud2htx_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = imx_pcm_dma_init(pdev);
-	if (ret)
-		dev_err(&pdev->dev, "failed to init imx pcm dma: %d\n", ret);
-
 	return ret;
 }
 

-- 
2.34.1

Call pm_runtime_disable() when error happens in probe()

Signed-off-by: Shengjiu Wang <redacted>
---
 sound/soc/fsl/fsl_aud2htx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/fsl/fsl_aud2htx.c b/sound/soc/fsl/fsl_aud2htx.c
index bc1b9c6df95c..1e421d9a03fb 100644
--- a/sound/soc/fsl/fsl_aud2htx.c
+++ b/sound/soc/fsl/fsl_aud2htx.c

@@ -241,6 +241,7 @@ static int fsl_aud2htx_probe(struct platform_device *pdev)
 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to pcm register\n");
+		pm_runtime_disable(&pdev->dev);
 		return ret;
 	}
 

@@ -249,6 +250,7 @@ static int fsl_aud2htx_probe(struct platform_device *pdev)
 					      &fsl_aud2htx_dai, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register ASoC DAI\n");
+		pm_runtime_disable(&pdev->dev);
 		return ret;
 	}
 

-- 
2.34.1

On Thu, 25 Aug 2022 20:27:39 +0800, Shengjiu Wang wrote:

There is no defer probe when adding platform component to
snd_soc_pcm_runtime(rtd), the code is in snd_soc_add_pcm_runtime()

snd_soc_register_card()
  -> snd_soc_bind_card()
    -> snd_soc_add_pcm_runtime()
      -> adding cpu dai
      -> adding codec dai
      -> adding platform component.

[...]

Applied to

   broonie/sound.git for-linus

Thanks!

[1/2] ASoC: fsl_aud2htx: register platform component before registering cpu dai
      commit: ea532c29972df96fda20393d9bf057e898f5e965
[2/2] ASoC: fsl_aud2htx: Add error handler for pm_runtime_enable
      commit: b1cd3fd42db7593a2d24c06f1c53b8c886592080

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark