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ALSA: hda - Shutdown CX20722 on reboot/free to avoid spurious noises 

On shutdown/reboot of CX20722, first shut down all EAPDs, then
shut down the afg node to D3.

Failure to do so can lead to spurious noises from the internal speaker
directly after reboot (and before the codec is reinitialized again, i e
in BIOS setup or GRUB menus).

BugLink: https://bugs.launchpad.net/bugs/1487345
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
David Henningsson 2015-08-21 09:42:35 +02:00 committed by Takashi Iwai
parent 9544f8b6e2
commit f6b28e4ded
1 changed files with 22 additions and 1 deletions
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23
sound/pci/hda/patch_conexant.c
View File

@ -200,12 +200,33 @@ static int cx_auto_init(struct hda_codec *codec)
return 0;
}
#define cx_auto_free snd_hda_gen_free
static void cx_auto_reboot_notify(struct hda_codec *codec)
{
struct conexant_spec *spec = codec->spec;
if (codec->core.vendor_id != 0x14f150f2)
return;
/* Turn the CX20722 codec into D3 to avoid spurious noises
from the internal speaker during (and after) reboot */
cx_auto_turn_eapd(codec, spec->num_eapds, spec->eapds, false);
snd_hda_codec_set_power_to_all(codec, codec->core.afg, AC_PWRST_D3);
snd_hda_codec_write(codec, codec->core.afg, 0,
AC_VERB_SET_POWER_STATE, AC_PWRST_D3);
}
static void cx_auto_free(struct hda_codec *codec)
{
cx_auto_reboot_notify(codec);
snd_hda_gen_free(codec);
}
static const struct hda_codec_ops cx_auto_patch_ops = {
.build_controls = cx_auto_build_controls,
.build_pcms = snd_hda_gen_build_pcms,
.init = cx_auto_init,
.reboot_notify = cx_auto_reboot_notify,
.free = cx_auto_free,
.unsol_event = snd_hda_jack_unsol_event,
#ifdef CONFIG_PM