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>

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index f788a91b544a32f8e39f354e3ff95e328b0fd4bc..ca03c40609fcf09d8838ed05f4920de3f03a6cf7 100644 (file)
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -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