From 23d63a31d9f44d7daeac0d1fb65c6a73c70e5216 Mon Sep 17 00:00:00 2001
From: Mohan Kumar <mkumard@nvidia.com>
Date: Tue, 25 Aug 2020 10:54:15 +0530
Subject: [PATCH] ALSA: hda/tegra: Program WAKEEN register for Tegra
Git-commit: 23d63a31d9f44d7daeac0d1fb65c6a73c70e5216
Patch-mainline: v5.9-rc4
References: git-fixes

The WAKEEN bits are used to indicate which bits in the
STATESTS register may cause wake event during the codec
state change request. Configure the WAKEEN register for
the Tegra to detect the wake events.

Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Acked-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/20200825052415.20626-3-mkumard@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/pci/hda/hda_tegra.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -262,6 +262,10 @@ static int __maybe_unused hda_tegra_runt
 	struct hdac_bus *bus = azx_bus(chip);
 
 	if (chip && chip->running) {
+		/* enable controller wake up event */
+		azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) |
+			   STATESTS_INT_MASK);
+
 		azx_stop_chip(chip);
 		synchronize_irq(bus->irq);
 		azx_enter_link_reset(chip);
@@ -284,6 +288,9 @@ static int __maybe_unused hda_tegra_runt
 	if (chip && chip->running) {
 		hda_tegra_init(hda);
 		azx_init_chip(chip, 1);
+		/* disable controller wake up event*/
+		azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) &
+			   ~STATESTS_INT_MASK);
 	}
 
 	return 0;