linux-kernel - Re: [alsa-devel] [regression] 2.6.25-rc4 snd-es18xx broken on Alpha

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Message-Id: <20080330042413.BB1A3DBA2@gherkin.frus.com>
Date:	Sat, 29 Mar 2008 23:24:13 -0500 (CDT)
From:	rct@...s.com (Bob Tracy)
To:	Rene Herman <rene.herman@...access.nl>
CC:	Michael Cree <mcree@...on.net.nz>, Bob Tracy <rct@...s.com>,
	Takashi Iwai <tiwai@...e.de>,
	ALSA devel <alsa-devel@...a-project.org>,
	linux-kernel@...r.kernel.org,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	linux-alpha@...r.kernel.org, Krzysztof Helt <krzysztof.h1@...pl>
Subject: Re: [alsa-devel] [regression] 2.6.25-rc4 snd-es18xx broken on Alpha

Rene Herman wrote:
> There's a patch attached that disables mmap on MIATA. You and Bob seem to be 
> experiencing problems of a different nature (or severity at the least) but 
> for both of you it would be good to hear what applying this and then playing 
> using "aplay -D hw foo.wav" (on the miata systems, ofcourse) brings.
> 
> (...)
> 
> The mmap thing is sort of the last hickup to be expected from me -- having 
> no Alpha machines and with trouble not isolated to a specific driver nor 
> Alpha model, this would at that point ideally want someone with some more 
> specific Alpha insights to step in.
> 
> (...)
> 
> diff --git a/include/sound/asound.h b/include/sound/asound.h
> index 3eaf155..e3b9c2d 100644
> --- a/include/sound/asound.h
> +++ b/include/sound/asound.h
> @@ -241,8 +241,14 @@ typedef int __bitwise snd_pcm_subformat_t;
>  #define	SNDRV_PCM_SUBFORMAT_STD		((__force snd_pcm_subformat_t) 0)
>  #define	SNDRV_PCM_SUBFORMAT_LAST	SNDRV_PCM_SUBFORMAT_STD
>  
> +#ifdef CONFIG_ALPHA_MIATA
> +#define SNDRV_PCM_INFO_MMAP		0		/* the useful comment goes here */
> +#define SNDRV_PCM_INFO_MMAP_VALID	0
> +#else
>  #define SNDRV_PCM_INFO_MMAP		0x00000001	/* hardware supports mmap */
>  #define SNDRV_PCM_INFO_MMAP_VALID	0x00000002	/* period data are valid during transfer */
> +#endif
> +
>  #define SNDRV_PCM_INFO_DOUBLE		0x00000004	/* Double buffering needed for PCM start/stop */
>  #define SNDRV_PCM_INFO_BATCH		0x00000010	/* double buffering */
>  #define SNDRV_PCM_INFO_INTERLEAVED	0x00000100	/* channels are interleaved */

Late this evening I starting building a kernel with the above patch
applied.  It should be ready for testing sometime tomorrow.  Sorry for
the delay.

-- 
------------------------------------------------------------------------
Bob Tracy          |  "I was a beta tester for dirt.  They never did
rct@...s.com       |   get all the bugs out." - Steve McGrew on /.
------------------------------------------------------------------------
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