From 858e0ad9301d1270c02b5aca97537d2d6ee9dd68 Mon Sep 17 00:00:00 2001
From: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Date: Wed, 26 Aug 2020 20:03:06 +0300
Subject: [PATCH] ALSA: hda/hdmi: always check pin power status in i915 pin fixup
Git-commit: 858e0ad9301d1270c02b5aca97537d2d6ee9dd68
Patch-mainline: v5.9-rc4
References: git-fixes

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
i915_pin_cvt_fixup().

Buglink: https://github.com/thesofproject/linux/issues/2388
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200826170306.701566-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 3259d713ace9..1e1b13eb7829 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2794,6 +2794,7 @@ static void i915_pin_cvt_fixup(struct hda_codec *codec,
 			       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,
 			       per_pin->dev_id);
 		intel_verify_pin_cvt_connect(codec, per_pin);
-- 
2.26.2