From 1f9ec63b7938a37b0e8a1a5d64ca0c17260f10e6 Mon Sep 17 00:00:00 2001
From: RichardG867 <richardg867@gmail.com>
Date: Mon, 22 Nov 2021 17:05:41 -0300
Subject: [PATCH] Make AC97 codec status bits reflect powerdowns, fixes output
 on ES1371 VxD driver

---
 src/sound/snd_ac97_codec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/sound/snd_ac97_codec.c b/src/sound/snd_ac97_codec.c
index d83f4e293..80e2e68fc 100644
--- a/src/sound/snd_ac97_codec.c
+++ b/src/sound/snd_ac97_codec.c
@@ -292,6 +292,11 @@ line_gain:	val &= 0x9f1f;
 	case 0x26: /* Powerdown Control/Status */
 		i = dev->powerdown_mask << 8;
 		val = (val & i) | (prev & ~i);
+
+		/* Update status bits to reflect powerdowns. */
+		val = (val & ~0x000f) | (~(val >> 8) & 0x000f);
+		if (val & 0x0800) /* PR3 clears both ANL and REF */
+			val &= ~0x0004;
 		break;
 
 	case 0x28: /* Extended Audio ID */