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authorTakashi Iwai <tiwai@suse.de>2016-04-19 22:07:50 +0200
committerTakashi Iwai <tiwai@suse.de>2016-04-19 22:07:50 +0200
commitde3df8a986b635082a1d94bae2c361d043c57106 (patch)
tree5ab2e67a5c451c0b226441e029375519064ed287 /sound/pci
parentafecb146d8d8a60a1dde9cdf570c278649617fde (diff)
downloadlinux-de3df8a986b635082a1d94bae2c361d043c57106.tar.bz2
ALSA: hda - Keep powering up ADCs on Cirrus codecs
Although one weird behavior about the input path (inconsistent D0/D3 switch) on Cirrus CS420x codecs was fixed in the previous commit, there is still an issue on some Mac machines: the capture stream stalls when switching the ADCs on the fly. More badly, this keeps stuck until the next reboot. The dynamic ADC switching is already a bit fragile and assuming optimistically that the chip accepts the frequent power changes. On Cirrus codecs, this doesn't seem applicable. As a quick workaround, we pin down the ADCs to keep up in D0 when spec->dyn_adc_switch is set. In this way, the ADCs are kept up only for the system that were confirmed to be broken. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116171 Cc: <stable@vger.kernel.org> # v4.4+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/hda/patch_cirrus.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_cirrus.c b/sound/pci/hda/patch_cirrus.c
index a47e8ae0eb30..80bbadc83721 100644
--- a/sound/pci/hda/patch_cirrus.c
+++ b/sound/pci/hda/patch_cirrus.c
@@ -361,6 +361,7 @@ static int cs_parse_auto_config(struct hda_codec *codec)
{
struct cs_spec *spec = codec->spec;
int err;
+ int i;
err = snd_hda_parse_pin_defcfg(codec, &spec->gen.autocfg, NULL, 0);
if (err < 0)
@@ -370,6 +371,19 @@ static int cs_parse_auto_config(struct hda_codec *codec)
if (err < 0)
return err;
+ /* keep the ADCs powered up when it's dynamically switchable */
+ if (spec->gen.dyn_adc_switch) {
+ unsigned int done = 0;
+ for (i = 0; i < spec->gen.input_mux.num_items; i++) {
+ int idx = spec->gen.dyn_adc_idx[i];
+ if (done & (1 << idx))
+ continue;
+ snd_hda_gen_fix_pin_power(codec,
+ spec->gen.adc_nids[idx]);
+ done |= 1 << idx;
+ }
+ }
+
return 0;
}