linux-kernel - [PATCH] ASoC: ti: davinci-mcasp: Add system suspend/resume support

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Message-ID: <20260211221001.155843-1-sen@ti.com>
Date: Wed, 11 Feb 2026 16:10:01 -0600
From: Sen Wang <sen@...com>
To: <peter.ujfalusi@...il.com>, <broonie@...nel.org>, <lgirdwood@...il.com>,
	<perex@...ex.cz>, <tiwai@...e.com>, <linux-sound@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: <devarsht@...com>, <r-donadkar@...com>, <s-jain1@...com>, <m-shah@...com>,
	Sen Wang <sen@...com>
Subject: [PATCH] ASoC: ti: davinci-mcasp: Add system suspend/resume support

The McASP driver supports runtime PM callbacks for register save/restore
during device idle, but doesn't provide system suspend/resume callbacks.
This causes audio to fail to resume after system suspend.

Since the driver already handles runtime suspend & resume, we can reuse
existing runtime PM logics.

Signed-off-by: Sen Wang <sen@...com>
---
Tested on SK-AM62Px with audio playback during system suspend/resume cycles

Testlog:
  https://gist.github.com/SenWang125/065c2840071f2569a79db9e99010603f

 sound/soc/ti/davinci-mcasp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c
index 8a2977093df1..643661ebee83 100644
--- a/sound/soc/ti/davinci-mcasp.c
+++ b/sound/soc/ti/davinci-mcasp.c
@@ -2811,6 +2811,8 @@ static int davinci_mcasp_runtime_resume(struct device *dev)
 #endif
 
 static const struct dev_pm_ops davinci_mcasp_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
 	SET_RUNTIME_PM_OPS(davinci_mcasp_runtime_suspend,
 			   davinci_mcasp_runtime_resume,
 			   NULL)
-- 
2.43.0