[PATCH 1/2] ASoC: core: display the platform node name if there is no platform name

[PATCH 1/2] ASoC: core: display the platform node name if there is no platform name

[Timur Tabi]

A platform can be matched by either a string name or a device tree node
pointer, so we can't assume that dai_link->platform_name is valid.  Fix
an error message in soc_bind_dai_link() to use the device tree node
name if the platform name is null.

Signed-off-by: Timur Tabi <timur@freescale.com>
---
 sound/soc/soc-core.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index ad65459..d81ef5b 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -897,7 +897,8 @@ static int soc_bind_dai_link(struct snd_soc_card *card, int num)
 	}
 	if (!rtd->platform) {
 		dev_err(card->dev, "platform %s not registered\n",
-			dai_link->platform_name);
+			dai_link->platform_name ? :
+				dai_link->platform_of_node->full_name);
 		return -EPROBE_DEFER;
 	}
 
-- 
1.7.3.4

[PATCH 2/2] ASoC: fsl: use snd_soc_register_card to register the card

[Timur Tabi]

Use snd_soc_register_card() instead of platform_device_alloc("soc-audio")
to register the sound card from the machine drivers.

Although platform_device_alloc is officially deprecated, it is still used
by several other drivers.  Unfortunately, something is broken somewhere
and the Freescale drivers don't register properly when using it.  Since
we need to transition to snd_soc_register_card() anyway, this fixes the
problem and updates our code at the same time.

We also transition the module initialize to late_initcall(), so that
the machine driver loads last.  Although this is technically not
necessary, it does avoid this error message at boot time:

	ALSA device list:
	  No soundcards found.

Signed-off-by: Timur Tabi <timur@freescale.com>
---
 sound/soc/fsl/mpc8610_hpcd.c |   25 ++++++-------------------
 sound/soc/fsl/p1022_ds.c     |   24 +++++-------------------
 2 files changed, 11 insertions(+), 38 deletions(-)

diff --git a/sound/soc/fsl/mpc8610_hpcd.c b/sound/soc/fsl/mpc8610_hpcd.c
index 60bcba1..65347de 100644
--- a/sound/soc/fsl/mpc8610_hpcd.c
+++ b/sound/soc/fsl/mpc8610_hpcd.c
@@ -192,7 +192,6 @@ static int mpc8610_hpcd_probe(struct platform_device *pdev)
 		container_of(dev, struct platform_device, dev);
 	struct device_node *np = ssi_pdev->dev.of_node;
 	struct device_node *codec_np = NULL;
-	struct platform_device *sound_device = NULL;
 	struct mpc8610_hpcd_data *machine_data;
 	int ret = -ENODEV;
 	const char *sprop;
@@ -341,34 +340,22 @@ static int mpc8610_hpcd_probe(struct platform_device *pdev)
 	machine_data->card.probe = mpc8610_hpcd_machine_probe;
 	machine_data->card.remove = mpc8610_hpcd_machine_remove;
 	machine_data->card.name = pdev->name; /* The platform driver name */
+	machine_data->card.owner = THIS_MODULE;
+	machine_data->card.dev = &pdev->dev;
 	machine_data->card.num_links = 2;
 	machine_data->card.dai_link = machine_data->dai;
 
-	/* Allocate a new audio platform device structure */
-	sound_device = platform_device_alloc("soc-audio", -1);
-	if (!sound_device) {
-		dev_err(&pdev->dev, "platform device alloc failed\n");
-		ret = -ENOMEM;
-		goto error;
-	}
-
-	/* Associate the card data with the sound device */
-	platform_set_drvdata(sound_device, &machine_data->card);
-
 	/* Register with ASoC */
-	ret = platform_device_add(sound_device);
+	ret = snd_soc_register_card(&machine_data->card);
 	if (ret) {
-		dev_err(&pdev->dev, "platform device add failed\n");
-		goto error_sound;
+		dev_err(&pdev->dev, "could not register card\n");
+		goto error;
 	}
-	dev_set_drvdata(&pdev->dev, sound_device);
 
 	of_node_put(codec_np);
 
 	return 0;
 
-error_sound:
-	platform_device_put(sound_device);
 error:
 	kfree(machine_data);
 error_alloc:
@@ -443,7 +430,7 @@ static void __exit mpc8610_hpcd_exit(void)
 	platform_driver_unregister(&mpc8610_hpcd_driver);
 }
 
-module_init(mpc8610_hpcd_init);
+late_initcall(mpc8610_hpcd_init);
 module_exit(mpc8610_hpcd_exit);
 
 MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
diff --git a/sound/soc/fsl/p1022_ds.c b/sound/soc/fsl/p1022_ds.c
index 50adf40..13110c4 100644
--- a/sound/soc/fsl/p1022_ds.c
+++ b/sound/soc/fsl/p1022_ds.c
@@ -202,7 +202,6 @@ static int p1022_ds_probe(struct platform_device *pdev)
 		container_of(dev, struct platform_device, dev);
 	struct device_node *np = ssi_pdev->dev.of_node;
 	struct device_node *codec_np = NULL;
-	struct platform_device *sound_device = NULL;
 	struct machine_data *mdata;
 	int ret = -ENODEV;
 	const char *sprop;
@@ -349,36 +348,23 @@ static int p1022_ds_probe(struct platform_device *pdev)
 	mdata->card.probe = p1022_ds_machine_probe;
 	mdata->card.remove = p1022_ds_machine_remove;
 	mdata->card.name = pdev->name; /* The platform driver name */
+	mdata->card.owner = THIS_MODULE;
+	mdata->card.dev = &pdev->dev;
 	mdata->card.num_links = 2;
 	mdata->card.dai_link = mdata->dai;
 
-	/* Allocate a new audio platform device structure */
-	sound_device = platform_device_alloc("soc-audio", -1);
-	if (!sound_device) {
-		dev_err(&pdev->dev, "platform device alloc failed\n");
-		ret = -ENOMEM;
-		goto error;
-	}
-
-	/* Associate the card data with the sound device */
-	platform_set_drvdata(sound_device, &mdata->card);
-
 	/* Register with ASoC */
-	ret = platform_device_add(sound_device);
+	ret = snd_soc_register_card(&mdata->card);
 	if (ret) {
-		dev_err(&pdev->dev, "platform device add failed\n");
+		dev_err(&pdev->dev, "could not register card\n");
 		goto error;
 	}
-	dev_set_drvdata(&pdev->dev, sound_device);
 
 	of_node_put(codec_np);
 
 	return 0;
 
 error:
-	if (sound_device)
-		platform_device_put(sound_device);
-
 	kfree(mdata);
 error_put:
 	of_node_put(codec_np);
@@ -453,7 +439,7 @@ static void __exit p1022_ds_exit(void)
 	platform_driver_unregister(&p1022_ds_driver);
 }
 
-module_init(p1022_ds_init);
+late_initcall(p1022_ds_init);
 module_exit(p1022_ds_exit);
 
 MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
-- 
1.7.3.4

Re: [PATCH 2/2] ASoC: fsl: use snd_soc_register_card to register the card

[Mark Brown]

On Mon, Sep 10, 2012 at 05:02:56PM -0500, Timur Tabi wrote:

> We also transition the module initialize to late_initcall(), so that
> the machine driver loads last.  Although this is technically not
> necessary, it does avoid this error message at boot time:
> 
> 	ALSA device list:
> 	  No soundcards found.

This should've been a separate patch...  if we we're going to do this we
really should be doing it for all cards, not just this one, though it'd
be better to either remove or fix the logging itself.

Re: [PATCH 1/2] ASoC: core: display the platform node name if there is no platform name

[Mark Brown]

On Mon, Sep 10, 2012 at 05:02:55PM -0500, Timur Tabi wrote:
> A platform can be matched by either a string name or a device tree node
> pointer, so we can't assume that dai_link->platform_name is valid.  Fix
> an error message in soc_bind_dai_link() to use the device tree node
> name if the platform name is null.

Applied, but please avoid the use of the ternery operator in future.

Re: [PATCH 2/2] ASoC: fsl: use snd_soc_register_card to register the card

[Tabi Timur-B04825]

Mark Brown wrote:
> This should've been a separate patch...  if we we're going to do this we
> really should be doing it for all cards, not just this one, though it'd
> be better to either remove or fix the logging itself.

Ok, I'll split it, but I do agree that it should be fixed in ASoC itself. 
  I just don't know how to do that.

I do admit that my change is a band-aid.

-- 
Timur Tabi
Linux kernel developer at Freescale

Re: [PATCH 1/2] ASoC: core: display the platform node name if there is no platform name

[Tabi Timur-B04825]

Mark Brown wrote:
> Applied, but please avoid the use of the ternery operator in future.

Oh come on, how can you not love it?  It's an awesome feature of the language.

-- 
Timur Tabi
Linux kernel developer at Freescale

Re: [PATCH 2/2] ASoC: fsl: use snd_soc_register_card to register the card

[Mark Brown]

On Tue, Sep 11, 2012 at 12:27:04AM +0000, Tabi Timur-B04825 wrote:

> Ok, I'll split it, but I do agree that it should be fixed in ASoC itself. 
>   I just don't know how to do that.

I'd probably go with the simpler approach of just removing the log
message, possibly replacing it with one as each card is instantiated.