linux-kernel - [PATCH V2] ALSA: hda/conexant: Implement resume function

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Message-Id: <20251119085345.141850-1-wangdich9700@163.com>
Date: Wed, 19 Nov 2025 16:53:45 +0800
From: wangdich9700@....com
To: lgirdwood@...il.com,
	broonie@...nel.org,
	perex@...ex.cz,
	tiwai@...e.com,
	cezary.rojewski@...el.com
Cc: linux-kernel@...r.kernel.org,
	linux-sound@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	wangdicheng <wangdicheng@...inos.cn>
Subject: [PATCH V2] ALSA: hda/conexant: Implement resume function

From: wangdicheng <wangdicheng@...inos.cn>

During S3 sleep state, if headphones are unplugged, we need to re-report
their status during the wake phase to ensure proper headphone presence
detection after system resume.

Signed-off-by: wangdicheng <wangdicheng@...inos.cn>
---

v1->v2:
Problem: No audio output device after S3.
Cause: The audio driver misses re-initialization upon resume,
resulting in stale jack status (remaining in the pre-sleep state),
which prevents the system from finding the correct output device.

 sound/hda/codecs/conexant.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/hda/codecs/conexant.c b/sound/hda/codecs/conexant.c
index 5fcbc1312c69..146ff65ccc30 100644
--- a/sound/hda/codecs/conexant.c
+++ b/sound/hda/codecs/conexant.c
@@ -264,6 +264,13 @@ static int cx_suspend(struct hda_codec *codec)
 	return 0;
 }
 
+static int cx_resume(struct hda_codec *codec)
+{
+	cx_init(codec);
+	snd_hda_jack_report_sync(codec);
+	return 0;
+}
+
 /*
  * pin fix-up
  */
@@ -1277,6 +1284,7 @@ static const struct hda_codec_ops cx_codec_ops = {
 	.init = cx_init,
 	.unsol_event = snd_hda_jack_unsol_event,
 	.suspend = cx_suspend,
+	.resume = cx_resume,
 	.check_power_status = snd_hda_gen_check_power_status,
 	.stream_pm = snd_hda_gen_stream_pm,
 };
-- 
2.25.1