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ALSA: hda - Build PCMs and controls at codec driver probe

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This makes the code flow easier -- instead of the controller driver
calling snd_hda_build_pcms() and snd_hda_build_controls() explicitly,
the codec driver itself builds PCMs and controls at probe time.  Then
the controller driver only needs to call snd_card_register().

Also, this allows us the full bind/unbind control, too.  Even when a
codec driver is bound later, it automatically registers the new PCM
and controls by itself.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2015-02-27 20:44:54 +01:00
parent 9a6246ff78
commit bcd96557bd
5 changed files with 17 additions and 94 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sound/pci/hda/hda_bind.c
View File

@ -106,16 +106,28 @@ static int hda_codec_driver_probe(struct device *dev)
}
err = codec->preset->patch(codec);
if (err < 0) {
module_put(owner);
goto error;
if (err < 0)
goto error_module;
err = snd_hda_codec_build_pcms(codec);
if (err < 0)
goto error_module;
err = snd_hda_codec_build_controls(codec);
if (err < 0)
goto error_module;
if (codec->card->registered) {
err = snd_card_register(codec->card);
if (err < 0)
goto error_module;
}
return 0;
error_module:
module_put(owner);
error:
codec->preset = NULL;
memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));
snd_hda_codec_cleanup_for_unbind(codec);
return err;
}

67
sound/pci/hda/hda_codec.c
View File

@ -4031,36 +4031,6 @@ const struct dev_pm_ops hda_codec_driver_pm = {
NULL)
};
/**
* snd_hda_build_controls - build mixer controls
* @bus: the BUS
*
* Creates mixer controls for each codec included in the bus.
*
* Returns 0 if successful, otherwise a negative error code.
*/
int snd_hda_build_controls(struct hda_bus *bus)
{
struct hda_codec *codec;
list_for_each_entry(codec, &bus->codec_list, list) {
int err = snd_hda_codec_build_controls(codec);
if (err < 0) {
codec_err(codec,
"cannot build controls for #%d (error %d)\n",
codec->addr, err);
err = snd_hda_codec_reset(codec);
if (err < 0) {
codec_err(codec,
"cannot revert codec\n");
return err;
}
}
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_build_controls);
/*
* add standard channel maps if not specified
*/
@ -4692,43 +4662,6 @@ int snd_hda_codec_build_pcms(struct hda_codec *codec)
return 0;
}
/**
* snd_hda_build_pcms - build PCM information
* @bus: the BUS
*
* Create PCM information for each codec included in the bus.
*
* The build_pcms codec patch is requested to create and assign new
* hda_pcm objects. The codec is responsible to call snd_hda_codec_pcm_new()
* and fills the fields. Later they are instantiated by this function.
*
* At least, substreams, channels_min and channels_max must be filled for
* each stream. substreams = 0 indicates that the stream doesn't exist.
* When rates and/or formats are zero, the supported values are queried
* from the given nid. The nid is used also by the default ops.prepare
* and ops.cleanup callbacks.
*
* The driver needs to call ops.open in its open callback. Similarly,
* ops.close is supposed to be called in the close callback.
* ops.prepare should be called in the prepare or hw_params callback
* with the proper parameters for set up.
* ops.cleanup should be called in hw_free for clean up of streams.
*
* This function returns 0 if successful, or a negative error code.
*/
int snd_hda_build_pcms(struct hda_bus *bus)
{
struct hda_codec *codec;
list_for_each_entry(codec, &bus->codec_list, list) {
int err = snd_hda_codec_build_pcms(codec);
if (err < 0)
return err;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_build_pcms);
/**
* snd_hda_add_new_ctls - create controls from the array
* @codec: the HDA codec

2
sound/pci/hda/hda_codec.h
View File

@ -516,13 +516,11 @@ void snd_hda_spdif_ctls_assign(struct hda_codec *codec, int idx, hda_nid_t nid);
/*
* Mixer
*/
int snd_hda_build_controls(struct hda_bus *bus);
int snd_hda_codec_build_controls(struct hda_codec *codec);
/*
* PCM
*/
int snd_hda_build_pcms(struct hda_bus *bus);
int snd_hda_codec_parse_pcms(struct hda_codec *codec);
int snd_hda_codec_build_pcms(struct hda_codec *codec);

10
sound/pci/hda/hda_intel.c
View File

@ -1895,16 +1895,6 @@ static int azx_probe_continue(struct azx *chip)
goto out_free;
}
/* create PCM streams */
err = snd_hda_build_pcms(chip->bus);
if (err < 0)
goto out_free;
/* create mixer controls */
err = snd_hda_build_controls(chip->bus);
if (err < 0)
goto out_free;
err = snd_card_register(chip->card);
if (err < 0)
goto out_free;

10
sound/pci/hda/hda_tegra.c
View File

@ -497,16 +497,6 @@ static int hda_tegra_probe(struct platform_device *pdev)
if (err < 0)
goto out_free;
/* create PCM streams */
err = snd_hda_build_pcms(chip->bus);
if (err < 0)
goto out_free;
/* create mixer controls */
err = snd_hda_build_controls(chip->bus);
if (err < 0)
goto out_free;
err = snd_card_register(chip->card);
if (err < 0)
goto out_free;