[PATCH 1/2] ASoC: fsl_ssi: AC'97 ops need regmap, clock and cleaning up on failure

[PATCH 1/2] ASoC: fsl_ssi: AC'97 ops need regmap, clock and cleaning up on failure

[Maciej S. Szmigiero]

AC'97 ops (register read / write) need SSI regmap and clock, so they have
to be set after them.

We also need to set these ops back to NULL if we fail the probe.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
 sound/soc/fsl/fsl_ssi.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index dad80b4b0cfc..a71bb8391f61 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -1460,12 +1460,6 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 				sizeof(fsl_ssi_ac97_dai));
 
 		fsl_ac97_data = ssi_private;
-
-		ret = snd_soc_set_ac97_ops_of_reset(&fsl_ssi_ac97_ops, pdev);
-		if (ret) {
-			dev_err(&pdev->dev, "could not set AC'97 ops\n");
-			return ret;
-		}
 	} else {
 		/* Initialize this copy of the CPU DAI driver structure */
 		memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_dai_template,
@@ -1576,6 +1570,14 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 			return ret;
 	}
 
+	if (fsl_ssi_is_ac97(ssi_private)) {
+		ret = snd_soc_set_ac97_ops_of_reset(&fsl_ssi_ac97_ops, pdev);
+		if (ret) {
+			dev_err(&pdev->dev, "could not set AC'97 ops\n");
+			goto error_ac97_ops;
+		}
+	}
+
 	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_ssi_component,
 					      &ssi_private->cpu_dai_drv, 1);
 	if (ret) {
@@ -1659,6 +1661,10 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 	fsl_ssi_debugfs_remove(&ssi_private->dbg_stats);
 
 error_asoc_register:
+	if (fsl_ssi_is_ac97(ssi_private))
+		snd_soc_set_ac97_ops(NULL);
+
+error_ac97_ops:
 	if (ssi_private->soc->imx)
 		fsl_ssi_imx_clean(pdev, ssi_private);
 

Re: [alsa-devel] [PATCH 1/2] ASoC: fsl_ssi: AC'97 ops need regmap, clock and cleaning up on failure

[Nicolin Chen]

On Mon, Nov 20, 2017 at 11:14:55PM +0100, Maciej S. Szmigiero wrote:
> AC'97 ops (register read / write) need SSI regmap and clock, so they have
> to be set after them.
> 
> We also need to set these ops back to NULL if we fail the probe.
> 
> Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>

Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>

> ---
>  sound/soc/fsl/fsl_ssi.c | 18 ++++++++++++------
>  1 file changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
> index dad80b4b0cfc..a71bb8391f61 100644
> --- a/sound/soc/fsl/fsl_ssi.c
> +++ b/sound/soc/fsl/fsl_ssi.c
> @@ -1460,12 +1460,6 @@ static int fsl_ssi_probe(struct platform_device *pdev)
>  				sizeof(fsl_ssi_ac97_dai));
>  
>  		fsl_ac97_data = ssi_private;

By the way, is there any better way to register the ops for AC97
while we could pass the ssi_private so as to remove the global
fsl_ac97_data?

Re: [alsa-devel] [PATCH 1/2] ASoC: fsl_ssi: AC'97 ops need regmap, clock and cleaning up on failure

[Maciej S. Szmigiero]

On 21.11.2017 01:32, Nicolin Chen wrote:
> On Mon, Nov 20, 2017 at 11:14:55PM +0100, Maciej S. Szmigiero wrote:
(..)
>> @@ -1460,12 +1460,6 @@ static int fsl_ssi_probe(struct platform_device *pdev)
>>  				sizeof(fsl_ssi_ac97_dai));
>>  
>>  		fsl_ac97_data = ssi_private;
> 
> By the way, is there any better way to register the ops for AC97
> while we could pass the ssi_private so as to remove the global
> fsl_ac97_data?

This might be possible (if SSI private data is provided to AC'97 codec in
codecs/ac97.c in platform device data which then is modified to make use
of it), but currently ASoC AC'97 only supports one controller per system
so for a real gain this limitation would have to be addressed first.

Maciej