[alsa-devel] [PATCH 1/3] [ALSA] hda - Support rereading widgets under the function group

[Takashi Iwai]

At Fri,  8 Feb 2013 17:09:31 -0500,
mengdong.lin at intel.com wrote:
> 
> From: Mengdong Lin <mengdong.lin at intel.com>
> 
> A codec may allow software to hide some unused pin/cvt widgets.
> 
> Sometimes BIOS does not enable the hidden widgets properly although they are
> needed for the board. Thus the driver need to enable them as a board-specific
> fixup and the whole tree will change.
> 
> This patch implements a common code for rereading codec widgets. So the fixup
> code can call it after enabling the hidden widgets.
> 
> Signed-off-by: Mengdong Lin <mengdong.lin at intel.com>

Applied all three patches.  Thanks.


Takashi

> 
> diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
> index 3c92514..e80f835 100644
> --- a/sound/pci/hda/hda_codec.c
> +++ b/sound/pci/hda/hda_codec.c
> @@ -1441,6 +1441,30 @@ int snd_hda_codec_new(struct hda_bus *bus,
>  }
>  EXPORT_SYMBOL_HDA(snd_hda_codec_new);
>  
> +int snd_hda_codec_update_widgets(struct hda_codec *codec)
> +{
> +	hda_nid_t fg;
> +	int err;
> +
> +	/* Assume the function group node does not change,
> +	 * only the widget nodes may change.
> +	 */
> +	kfree(codec->wcaps);
> +	fg = codec->afg ? codec->afg : codec->mfg;
> +	err = read_widget_caps(codec, fg);
> +	if (err < 0) {
> +		snd_printk(KERN_ERR "hda_codec: cannot malloc\n");
> +		return err;
> +	}
> +
> +	snd_array_free(&codec->init_pins);
> +	err = read_pin_defaults(codec);
> +
> +	return err;
> +}
> +EXPORT_SYMBOL_HDA(snd_hda_codec_update_widgets);
> +
> +
>  /**
>   * snd_hda_codec_configure - (Re-)configure the HD-audio codec
>   * @codec: the HDA codec
> diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
> index 0be1826..e8c9442 100644
> --- a/sound/pci/hda/hda_codec.h
> +++ b/sound/pci/hda/hda_codec.h
> @@ -935,6 +935,7 @@ int snd_hda_bus_new(struct snd_card *card, const struct hda_bus_template *temp,
>  int snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
>  		      struct hda_codec **codecp);
>  int snd_hda_codec_configure(struct hda_codec *codec);
> +int snd_hda_codec_update_widgets(struct hda_codec *codec);
>  
>  /*
>   * low level functions
> -- 
> 1.7.10.4
> 
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