linux-kernel - Re: [Alsa-devel] [RFC: 2.6 patch] sound/: possible cleanups

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Message-ID: <s5htzzsdu0e.wl%tiwai@suse.de>
Date:	Tue, 19 Dec 2006 12:06:57 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	perex@...e.cz, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [Alsa-devel] [RFC: 2.6 patch] sound/: possible cleanups

At Mon, 18 Dec 2006 04:46:39 +0100,
Adrian Bunk wrote:
> 
> --- linux-2.6.19-rc6-mm2/sound/pci/hda/hda_codec.h.old	2006-12-04 17:03:15.000000000 +0100
> +++ linux-2.6.19-rc6-mm2/sound/pci/hda/hda_codec.h	2006-12-04 17:03:23.000000000 +0100
> @@ -614,10 +614,6 @@
>  				int channel_id, int format);
>  unsigned int snd_hda_calc_stream_format(unsigned int rate, unsigned int channels,
>  					unsigned int format, unsigned int maxbps);
> -int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
> -				u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
> -int snd_hda_is_supported_format(struct hda_codec *codec, hda_nid_t nid,
> -				unsigned int format);

I'd like to keep them usable for codec support codes.
Removing EXPORT_SYMBOL() is fine, though.

> --- linux-2.6.19-rc6-mm2/sound/pci/ac97/ac97_local.h.old	2006-12-04 16:53:59.000000000 +0100
> +++ linux-2.6.19-rc6-mm2/sound/pci/ac97/ac97_local.h	2006-12-04 16:54:52.000000000 +0100
> @@ -65,9 +65,6 @@
>  int snd_ac97_get_volsw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol);
>  int snd_ac97_put_volsw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol);
>  int snd_ac97_try_bit(struct snd_ac97 * ac97, int reg, int bit);
> -int snd_ac97_remove_ctl(struct snd_ac97 *ac97, const char *name, const char *suffix);
> -int snd_ac97_rename_ctl(struct snd_ac97 *ac97, const char *src, const char *dst, const char *suffix);
> -int snd_ac97_swap_ctl(struct snd_ac97 *ac97, const char *s1, const char *s2, const char *suffix);

These are used in ac97_patch.c, at least in pending patches after
2.6.19.

> --- linux-2.6.19-rc6-mm2/include/sound/core.h.old	2006-12-04 17:13:39.000000000 +0100
> +++ linux-2.6.19-rc6-mm2/include/sound/core.h	2006-12-04 17:49:07.000000000 +0100
> @@ -22,6 +22,7 @@
>   *
>   */
>  
> +#include <sound/driver.h>

This makes things a bit complicated, so please don't add it yet.
It's better to clean up into a single core.h in future.

> @@ -35,6 +36,7 @@
>  #ifdef CONFIG_SBUS
>  struct sbus_dev;
>  #endif
> +struct snd_info_buffer;
>  
>  /* device allocation stuff */
>  
> @@ -287,6 +289,8 @@
>  int snd_card_file_add(struct snd_card *card, struct file *file);
>  int snd_card_file_remove(struct snd_card *card, struct file *file);
>  
> +void snd_card_info_read_oss(struct snd_info_buffer *buffer);
> +
>  #ifndef snd_card_set_dev
>  #define snd_card_set_dev(card,devptr) ((card)->parent = (devptr))
>  #endif

These should be rather in another file, e.g. info.h.

> --- linux-2.6.19-rc6-mm2/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl.old	2006-12-04 17:17:34.000000000 +0100
> +++ linux-2.6.19-rc6-mm2/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl	2006-12-04 17:18:34.000000000 +0100
> @@ -5648,8 +5648,7 @@
>      <para>
>  	As shown in the above, it's better to save registers after
>  	suspending the PCM operations via
> -	<function>snd_pcm_suspend_all()</function> or
> -	<function>snd_pcm_suspend()</function>.  It means that the PCM
> +	<function>snd_pcm_suspend_all()</function>.  It means that the PCM
>  	streams are already stoppped when the register snapshot is
>  	taken.  But, remind that you don't have to restart the PCM
>  	stream in the resume callback. It'll be restarted via 
> --- linux-2.6.19-rc6-mm2/include/sound/pcm.h.old	2006-12-04 17:14:50.000000000 +0100
> +++ linux-2.6.19-rc6-mm2/include/sound/pcm.h	2006-12-04 17:20:10.000000000 +0100
> @@ -467,10 +467,7 @@
>  int snd_pcm_start(struct snd_pcm_substream *substream);
>  int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
>  int snd_pcm_drain_done(struct snd_pcm_substream *substream);
> -#ifdef CONFIG_PM
> -int snd_pcm_suspend(struct snd_pcm_substream *substream);
>  int snd_pcm_suspend_all(struct snd_pcm *pcm);
> -#endif
>  int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
>  int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
>  			   struct snd_pcm_substream **rsubstream);

I tend to disagree this removal.


thanks,

Takashi
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