Re: [ALSA - driver 0000925]: no sound with CMI9761A, Cus fix verified OK

[thomas schorpp <t.schorpp@gmx.de>]

Takashi Iwai wrote:
> At Tue, 22 Feb 2005 21:26:14 +0100,
> thomas schorpp wrote:
> 
>>post it here, cant get on bugtracker:
> 
> 
> Still not possible?

no. do you respond to my notice to the webmaster?

> 
> 
>>this is ok with:
>>
>>-pcm playback
>>-pcm capture
>>-looped through lines
>>
>>thx, cus.
>>
>>  Additional Information  	 After some testing i found that the 
>>following patch fixes the problem:
>>
>>--- ac97_patch.c.orig 2005-02-18 00:08:01.000000000 +0100
>>+++ ac97_patch.c 2005-02-19 18:08:23.000000000 +0100
>>@@ -2010,7 +2010,7 @@
>>          ac97->ext_id |= AC97_EI_SPDIF;
>>         /* to be sure: we overwrite the ext status bits */
>>         snd_ac97_write_cache(ac97, AC97_EXTENDED_STATUS, 0x05c0);
>>- snd_ac97_write_cache(ac97, AC97_CM9761_SPDIF_CTRL, 0x0209);
>>+ snd_ac97_write_cache(ac97, AC97_CM9761_SPDIF_CTRL, 0x0009);
>>         ac97->rates[AC97_RATES_SPDIF] = SNDRV_PCM_RATE_48000; /* 48k 
>>only */
>>
>>         /* set-up multi channel */
>>
>>
>>I don't know why it works, and what that 0x0200 bit means in that 
>>register, someone may explain.
> 
> 
>>Cus
>>
>>outstanding : Maybe better to use 0x0001 instead? I guess 0x0008 
>>controls the "IEC958 Capture Monitor", and got some reports that this 
>>disturbs the output. tashaki.
>>
>>-no, now it disturbs no more.
> 
> 
> Then let's take 0x09.

0x0009 ? (LSB/MSB)

> 
> 
> 
>>all fine, thx.
>>
>>add.:
>>
>>with this you get master vol slider back:
>>
>>
>>	/* CM9761 has no Master and PCM volume although the register reacts */
>>	ac97->flags |= /*AC97_HAS_NO_MASTER_VOL |*/ AC97_HAS_NO_PCM_VOL;
>>
>>@takashi: maybe this was tested only with pcm not with looped through 
>>lines, before. i assume false negatives from previous tests.
> 
> 
> OK, I'll fix the CVS now.
> 
> 
> thanks,

at your sevice ;)

> 
> Takashi

tom




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