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| author | Takashi Iwai | 2012-01-25 11:54:19 +0100 |
|---|---|---|
| committer | Takashi Iwai | 2012-02-02 10:19:33 +0100 |
| commit | 4f2864a49bf058184e85c9f5a2f4578f11992c7d (patch) | |
| tree | 7154d97307e2e307611252cd67e7fa98f6380b58 /sound/pci/hda/patch_conexant.c | |
| parent | ALSA: hda - explicitly set buffer-align flag for Nvidia controllers (diff) | |
| download | kernel-qcow2-linux-4f2864a49bf058184e85c9f5a2f4578f11992c7d.tar.gz kernel-qcow2-linux-4f2864a49bf058184e85c9f5a2f4578f11992c7d.tar.xz kernel-qcow2-linux-4f2864a49bf058184e85c9f5a2f4578f11992c7d.zip | |
ALSA: hda - Enable sync_write and reset for Conexant codecs
This is an attempt to fix S3-resume problems reported for a few
laptops with different Conexant codecs. They show the communication
stalls at some time in S3, and the driver falls back into the
single-cmd mode. This leads to the silent output or the lack of
auto-mute feature.
As a workaround, here enables the sync_write and the bus-reset flags
to make the communication more stable.
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=740115
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=738397
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/patch_conexant.c')
| -rw-r--r-- | sound/pci/hda/patch_conexant.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c index a7a5733aa4d2..117ae4c22be0 100644 --- a/sound/pci/hda/patch_conexant.c +++ b/sound/pci/hda/patch_conexant.c @@ -4414,6 +4414,18 @@ static int patch_conexant_auto(struct hda_codec *codec) codec->patch_ops = cx_auto_patch_ops; if (spec->beep_amp) snd_hda_attach_beep_device(codec, spec->beep_amp); + + /* Some laptops with Conexant chips show stalls in S3 resume, + * which falls into the single-cmd mode. + * Better to make reset, then. + */ + if (!codec->bus->sync_write) { + snd_printd("hda_codec: " + "Enable sync_write for stable communication\n"); + codec->bus->sync_write = 1; + codec->bus->allow_bus_reset = 1; + } + return 0; } |