linux-kernel - [PATCH 5.4 043/132] ALSA: hda/tegra: Program WAKEEN register for Tegra

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Message-Id: <20200915140646.279252055@linuxfoundation.org>
Date:   Tue, 15 Sep 2020 16:12:25 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mohan Kumar <mkumard@...dia.com>,
        Sameer Pujar <spujar@...dia.com>, Takashi Iwai <tiwai@...e.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 043/132] ALSA: hda/tegra: Program WAKEEN register for Tegra

From: Mohan Kumar <mkumard@...dia.com>

[ Upstream commit 23d63a31d9f44d7daeac0d1fb65c6a73c70e5216 ]

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@...dia.com>
Acked-by: Sameer Pujar <spujar@...dia.com>
Link: https://lore.kernel.org/r/20200825052415.20626-3-mkumard@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/pci/hda/hda_tegra.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index e5191584638ab..e378cb33c69df 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -169,6 +169,10 @@ static int __maybe_unused hda_tegra_runtime_suspend(struct device *dev)
 	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);
@@ -191,6 +195,9 @@ static int __maybe_unused hda_tegra_runtime_resume(struct device *dev)
 	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;
-- 
2.25.1