diff options
| author | Laurence Darby <ldarby@tuffmail.com> | 2012-11-03 17:00:06 +0000 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-11-04 09:17:28 +0100 |
| commit | 3bef1c377d1bd8fd879ee5a66cf6f45ba16820cd (patch) | |
| tree | f0c8f9779c99a569e54285f31d8c303149d83bbb /sound/pci | |
| parent | a5d00dc3a4b65ed38249f3225e453944c633747b (diff) | |
| download | linux-3bef1c377d1bd8fd879ee5a66cf6f45ba16820cd.tar.bz2 | |
ALSA: hda - stop setup_dig_out_stream() causing clicks
Starting audio or seeking in various music players causes
setup_dig_out_stream() to be called, which resets the SPDIF stream,
which caused one DAC (but not another) to make a clicking noise every
time.
This patch ensures the reset only happens when it needs to, which is
when the format changes, and makes the code a little more readable.
Signed-off-by: Laurence Darby <ldarby@tuffmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 2da787519513..569bc05aad6c 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -4816,10 +4816,20 @@ EXPORT_SYMBOL_HDA(snd_hda_input_mux_put); static void setup_dig_out_stream(struct hda_codec *codec, hda_nid_t nid, unsigned int stream_tag, unsigned int format) { - struct hda_spdif_out *spdif = snd_hda_spdif_out_of_nid(codec, nid); - - /* turn off SPDIF once; otherwise the IEC958 bits won't be updated */ - if (codec->spdif_status_reset && (spdif->ctls & AC_DIG1_ENABLE)) + struct hda_spdif_out *spdif; + unsigned int curr_fmt; + bool reset; + + spdif = snd_hda_spdif_out_of_nid(codec, nid); + curr_fmt = snd_hda_codec_read(codec, nid, 0, + AC_VERB_GET_STREAM_FORMAT, 0); + reset = codec->spdif_status_reset && + (spdif->ctls & AC_DIG1_ENABLE) && + curr_fmt != format; + + /* turn off SPDIF if needed; otherwise the IEC958 bits won't be + updated */ + if (reset) set_dig_out_convert(codec, nid, spdif->ctls & ~AC_DIG1_ENABLE & 0xff, -1); @@ -4831,7 +4841,7 @@ static void setup_dig_out_stream(struct hda_codec *codec, hda_nid_t nid, format); } /* turn on again (if needed) */ - if (codec->spdif_status_reset && (spdif->ctls & AC_DIG1_ENABLE)) + if (reset) set_dig_out_convert(codec, nid, spdif->ctls & 0xff, -1); } |