diff options
| author | Takashi Iwai <tiwai@suse.de> | 2007-10-26 12:35:56 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2007-11-19 18:38:32 +0100 |
| commit | d29240ce57d96db7300360d1e6f18357810a5c2b (patch) | |
| tree | 5e095bde9f0180962481bbf330fd5a7de0bb8fd5 /sound | |
| parent | 2ffbb8377c7a0713baf6644e285adc27a5654582 (diff) | |
| download | lwn-d29240ce57d96db7300360d1e6f18357810a5c2b.tar.gz lwn-d29240ce57d96db7300360d1e6f18357810a5c2b.zip | |
[ALSA] hda-codec - Disable shared stream on AD1986A
AD1986A has a hardware problem that it cannot share a stream with
multiple pins properly. The problem occurs e.g. when a volume is changed
during playback.
So far, hda-intel driver unconditionally assigns the stream to multiple
output pins in copy-front mode, and this should be avoided for AD1986A
codec.
The original fix patch was by zhejiang <zhe.jiang@intel.com>.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 7 | ||||
| -rw-r--r-- | sound/pci/hda/hda_local.h | 1 | ||||
| -rw-r--r-- | sound/pci/hda/patch_analog.c | 8 |
3 files changed, 13 insertions, 3 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index ad4cb38109fc..b52f56ffedf4 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -2485,13 +2485,14 @@ int snd_hda_multi_out_analog_prepare(struct hda_codec *codec, /* front */ snd_hda_codec_setup_stream(codec, nids[HDA_FRONT], stream_tag, 0, format); - if (mout->hp_nid && mout->hp_nid != nids[HDA_FRONT]) + if (!mout->no_share_stream && + mout->hp_nid && mout->hp_nid != nids[HDA_FRONT]) /* headphone out will just decode front left/right (stereo) */ snd_hda_codec_setup_stream(codec, mout->hp_nid, stream_tag, 0, format); /* extra outputs copied from front */ for (i = 0; i < ARRAY_SIZE(mout->extra_out_nid); i++) - if (mout->extra_out_nid[i]) + if (!mout->no_share_stream && mout->extra_out_nid[i]) snd_hda_codec_setup_stream(codec, mout->extra_out_nid[i], stream_tag, 0, format); @@ -2501,7 +2502,7 @@ int snd_hda_multi_out_analog_prepare(struct hda_codec *codec, if (chs >= (i + 1) * 2) /* independent out */ snd_hda_codec_setup_stream(codec, nids[i], stream_tag, i * 2, format); - else /* copy front */ + else if (!mout->no_share_stream) /* copy front */ snd_hda_codec_setup_stream(codec, nids[i], stream_tag, 0, format); } diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index 20c5e6250374..8c56c9cb0d09 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -220,6 +220,7 @@ struct hda_multi_out { hda_nid_t dig_out_nid; /* digital out audio widget */ int max_channels; /* currently supported analog channels */ int dig_out_used; /* current usage of digital out (HDA_DIG_XXX) */ + int no_share_stream; /* don't share a stream with multiple pins */ }; int snd_hda_multi_out_dig_open(struct hda_codec *codec, diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c index 0ee8ae4d4410..196ad3c9405d 100644 --- a/sound/pci/hda/patch_analog.c +++ b/sound/pci/hda/patch_analog.c @@ -957,6 +957,14 @@ static int patch_ad1986a(struct hda_codec *codec) break; } + /* AD1986A has a hardware problem that it can't share a stream + * with multiple output pins. The copy of front to surrounds + * causes noisy or silent outputs at a certain timing, e.g. + * changing the volume. + * So, let's disable the shared stream. + */ + spec->multiout.no_share_stream = 1; + return 0; } |