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ALSA: hda/realtek - Avoid invalid COEFs for ALC271X 

We've seen often problems after suspend/resume on Acer Aspire One
AO725 with ALC271X codec as reported in kernel bugzilla, and it turned
out that some COEFs doesn't work and triggers the codec communication
stall.

Since these magic COEF setups are specific to ALC269VB for some PLL
configurations, the machine works even without these manual
adjustment.  So, let's simply avoid applying them for ALC271X.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=52181
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2014-02-03 09:56:13 +01:00
parent 4528eb19b0
commit d3c56568f4
1 changed files with 3 additions and 0 deletions
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3
sound/pci/hda/patch_realtek.c
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@ -4427,6 +4427,9 @@ static void alc269_fill_coef(struct hda_codec *codec)
if (spec->codec_variant != ALC269_TYPE_ALC269VB)
return;
/* ALC271X doesn't seem to support these COEFs (bko#52181) */
if (!strcmp(codec->chip_name, "ALC271X"))
return;
if ((alc_get_coef0(codec) & 0x00ff) < 0x015) {
alc_write_coef_idx(codec, 0xf, 0x960b);