[PATCH 3/4] ASoC: SOF: Intel: hda-codec: preserve WAKEEN values

[Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>]

Since LunarLake, we use the HDadio WAKEEN/WAKESTS to detect wakes for
SoundWire codecs. Unfortunately, the existing code in
hda_codec_jack_wake_enable() unconditionally resets the WAKEEN bits.

This patch changes the initialization to preserve SoundWire WAKEEN
bits. For HDAudio codecs the same strategy is used, WAKEEN is only set
when the jacktbl.used property is set.

Closes: https://github.com/thesofproject/linux/issues/4687
Co-developed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Keqiao Zhang <keqiao.zhang@xxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
 sound/soc/sof/intel/hda-codec.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sof/intel/hda-codec.c b/sound/soc/sof/intel/hda-codec.c
index 9f84b0d287a5..6a13f38a8d21 100644
--- a/sound/soc/sof/intel/hda-codec.c
+++ b/sound/soc/sof/intel/hda-codec.c
@@ -79,18 +79,27 @@ void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable)
 	struct hdac_bus *bus = sof_to_bus(sdev);
 	struct hda_codec *codec;
 	unsigned int mask = 0;
+	unsigned int val = 0;
 
 	if (IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC_DEBUG_SUPPORT) &&
 	    sof_debug_check_flag(SOF_DBG_FORCE_NOCODEC))
 		return;
 
 	if (enable) {
-		list_for_each_codec(codec, hbus)
+		list_for_each_codec(codec, hbus) {
+			/* only set WAKEEN when needed for HDaudio codecs */
+			mask |= BIT(codec->core.addr);
 			if (codec->jacktbl.used)
-				mask |= BIT(codec->core.addr);
+				val |= BIT(codec->core.addr);
+		}
+	} else {
+		list_for_each_codec(codec, hbus) {
+			/* reset WAKEEN only HDaudio codecs */
+			mask |= BIT(codec->core.addr);
+		}
 	}
 
-	snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
+	snd_hdac_chip_updatew(bus, WAKEEN, mask & STATESTS_INT_MASK, val);
 }
 EXPORT_SYMBOL_NS_GPL(hda_codec_jack_wake_enable, SND_SOC_SOF_HDA_AUDIO_CODEC);
 
-- 
2.40.1