[PATCH 4.9 08/25] ALSA: hda - Sleep for 10ms after entering D3 on Conexant codecs

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Park Ju Hyung <qkrwngud825@xxxxxxxxx>

commit f59cf9a0551dd954ad8b752461cf19d9789f4b1d upstream.

On rare occasions, we are still noticing that the internal speaker
spitting out spurious noises even after adding the problematic codec
to the list.

Adding a 10ms artificial delay before rebooting fixes the issue entirely.

Patch for Realtek codecs also adds the same amount of delay after
entering D3.

Signed-off-by: Park Ju Hyung <qkrwngud825@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 sound/pci/hda/patch_conexant.c |    1 +
 1 file changed, 1 insertion(+)

--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -219,6 +219,7 @@ static void cx_auto_reboot_notify(struct
 	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);
+	msleep(10);
 }
 
 static void cx_auto_free(struct hda_codec *codec)