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[ALSA] ac97 - Fix silent output problem with Cx20551 codec 

Fixed the silent output problem on laptops with Conexant Cx20551 codec
chip, such as Packard-bell EasyNote A* series.
The information was taken from ALSA bug#1134.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai 2007-02-09 12:42:03 +01:00 committed by Jaroslav Kysela
parent 9e507abd87
commit 9e292c0013
3 changed files with 8 additions and 0 deletions
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1
sound/pci/ac97/ac97_codec.c
View File

@ -143,6 +143,7 @@ static const struct ac97_codec_id snd_ac97_codec_ids[] = {
{ 0x43525970, 0xfffffff8, "CS4202", NULL, NULL },
{ 0x43585421, 0xffffffff, "HSD11246", NULL, NULL }, // SmartMC II
{ 0x43585428, 0xfffffff8, "Cx20468", patch_conexant, NULL }, // SmartAMC fixme: the mask might be different
{ 0x43585431, 0xffffffff, "Cx20551", patch_cx20551, NULL },
{ 0x44543031, 0xfffffff0, "DT0398", NULL, NULL },
{ 0x454d4328, 0xffffffff, "EM28028", NULL, NULL }, // same as TR28028?
{ 0x45838308, 0xffffffff, "ESS1988", NULL, NULL },

6
sound/pci/ac97/ac97_patch.c
View File

@ -1338,6 +1338,12 @@ int patch_conexant(struct snd_ac97 * ac97)
return 0;
}
int patch_cx20551(struct snd_ac97 *ac97)
{
snd_ac97_update_bits(ac97, 0x5c, 0x01, 0x01);
return 0;
}
/*
* Analog Device AD18xx, AD19xx codecs
*/

1
sound/pci/ac97/ac97_patch.h
View File

@ -39,6 +39,7 @@ int patch_sigmatel_stac9758(struct snd_ac97 * ac97);
int patch_cirrus_cs4299(struct snd_ac97 * ac97);
int patch_cirrus_spdif(struct snd_ac97 * ac97);
int patch_conexant(struct snd_ac97 * ac97);
int patch_cx20551(struct snd_ac97 * ac97);
int patch_ad1819(struct snd_ac97 * ac97);
int patch_ad1881(struct snd_ac97 * ac97);
int patch_ad1885(struct snd_ac97 * ac97);