[PATCH 5.8 139/186] ALSA: hda/hdmi: always check pin power status in i915 pin fixup

From: Greg Kroah-Hartman
Date: Tue Sep 08 2020 - 14:12:41 EST

From: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx>

commit 858e0ad9301d1270c02b5aca97537d2d6ee9dd68 upstream.

When system is suspended with active audio playback to HDMI/DP, two
alternative sequences can happen at resume:
a) monitor is detected first and ALSA prepare follows normal
stream setup sequence, or
b) ALSA prepare is called first, but monitor is not yet detected,
so PCM is restarted without a pin,

In case of (b), on i915 systems, haswell_verify_D0() is not called at
resume and the pin power state may be incorrect. Result is lack of audio
after resume with no error reported back to user-space.

Fix the problem by always verifying converter and pin state in the

BugLink: https://github.com/thesofproject/linux/issues/2388
Signed-off-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200826170306.701566-1-kai.vehmanen@xxxxxxxxxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2737,6 +2737,7 @@ static void i915_pin_cvt_fixup(struct hd
hda_nid_t cvt_nid)
if (per_pin) {
+ haswell_verify_D0(codec, per_pin->cvt_nid, per_pin->pin_nid);
snd_hda_set_dev_select(codec, per_pin->pin_nid,
intel_verify_pin_cvt_connect(codec, per_pin);