1 files changed, 89 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index f8e6ff7f8820..8015e4471267 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2926,6 +2926,88 @@ static void i915_pin_cvt_fixup(struct hda_codec *codec,
 	}
 }
 
+#ifdef CONFIG_PM
+static int i915_adlp_hdmi_suspend(struct hda_codec *codec)
+{
+	struct hdmi_spec *spec = codec->spec;
+	bool silent_streams = false;
+	int pin_idx, res;
+
+	res = generic_hdmi_suspend(codec);
+
+	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+		struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
+
+		if (per_pin->silent_stream) {
+			silent_streams = true;
+			break;
+		}
+	}
+
+	if (silent_streams && spec->silent_stream_type == SILENT_STREAM_KAE) {
+		/*
+		 * stream-id should remain programmed when codec goes
+		 * to runtime suspend
+		 */
+		codec->no_stream_clean_at_suspend = 1;
+
+		/*
+		 * the system might go to S3, in which case keep-alive
+		 * must be reprogrammed upon resume
+		 */
+		codec->forced_resume = 1;
+
+		codec_dbg(codec, "HDMI: KAE active at suspend\n");
+	} else {
+		codec->no_stream_clean_at_suspend = 0;
+		codec->forced_resume = 0;
+	}
+
+	return res;
+}
+
+static int i915_adlp_hdmi_resume(struct hda_codec *codec)
+{
+	struct hdmi_spec *spec = codec->spec;
+	int pin_idx, res;
+
+	res = generic_hdmi_resume(codec);
+
+	/* KAE not programmed at suspend, nothing to do here */
+	if (!codec->no_stream_clean_at_suspend)
+		return res;
+
+	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+		struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
+
+		/*
+		 * If system was in suspend with monitor connected,
+		 * the codec setting may have been lost. Re-enable
+		 * keep-alive.
+		 */
+		if (per_pin->silent_stream) {
+			unsigned int param;
+
+			param = snd_hda_codec_read(codec, per_pin->cvt_nid, 0,
+						   AC_VERB_GET_CONV, 0);
+			if (!param) {
+				codec_dbg(codec, "HDMI: KAE: restore stream id\n");
+				silent_stream_enable_i915(codec, per_pin);
+			}
+
+			param = snd_hda_codec_read(codec, per_pin->cvt_nid, 0,
+						   AC_VERB_GET_DIGI_CONVERT_1, 0);
+			if (!(param & (AC_DIG3_KAE << 16))) {
+				codec_dbg(codec, "HDMI: KAE: restore DIG3_KAE\n");
+				silent_stream_set_kae(codec, per_pin, true);
+			}
+		}
+	}
+
+	return res;
+}
+#endif
+
 /* precondition and allocation for Intel codecs */
 static int alloc_intel_hdmi(struct hda_codec *codec)
 {
@@ -3056,8 +3138,14 @@ static int patch_i915_adlp_hdmi(struct hda_codec *codec)
 	if (!res) {
 		spec = codec->spec;
 
-		if (spec->silent_stream_type)
+		if (spec->silent_stream_type) {
 			spec->silent_stream_type = SILENT_STREAM_KAE;
+
+#ifdef CONFIG_PM
+			codec->patch_ops.resume = i915_adlp_hdmi_resume;
+			codec->patch_ops.suspend = i915_adlp_hdmi_suspend;
+#endif
+		}
 	}
 
 	return res;