[PATCH v3] ALSA: hda/realtek: Sequence GPIO2 on Star Labs StarFighter

[Sean Rhodes <sean@starlabs.systems>]

The initial StarFighter quirk fixed the runtime suspend pop by muting
speakers in the shutup callback before power-down. Further hardware
validation showed that the speaker path is controlled directly by LINE2
EAPD on NID 0x1b together with GPIO2 for the external amplifier.

Replace the shutup-delay workaround with explicit sequencing of those
controls at playback start and stop:
- assert LINE2 EAPD and drive GPIO2 high on PREPARE
- deassert LINE2 EAPD and drive GPIO2 low on CLEANUP

This avoids the runtime suspend pop without a sleep, and also fixes pops
around G3 entry and display-manager start that the original workaround
did not cover.

Fixes: 1cb3c20688fc ("ALSA: hda/realtek: Fix speaker pop on Star Labs StarFighter")
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Stefan Binding <sbinding@opensource.cirrus.com>
Cc: Kailang Yang <kailang@realtek.com>
Cc: Chris Chiu <chris.chiu@canonical.com>
Cc: Edip Hazuri <edip@medip.dev>
Cc: linux-sound@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Tested-by: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
---
 sound/hda/codecs/realtek/alc269.c | 64 ++++++++++++++++++++++---------
 1 file changed, 45 insertions(+), 19 deletions(-)

diff --git a/sound/hda/codecs/realtek/alc269.c b/sound/hda/codecs/realtek/alc269.c
index 4c49f1195e1b..901314a7af51 100644
--- a/sound/hda/codecs/realtek/alc269.c
+++ b/sound/hda/codecs/realtek/alc269.c
@@ -1017,24 +1017,6 @@ static int alc269_resume(struct hda_codec *codec)
 	return 0;
 }
 
-#define STARLABS_STARFIGHTER_SHUTUP_DELAY_MS	30
-
-static void starlabs_starfighter_shutup(struct hda_codec *codec)
-{
-	if (snd_hda_gen_shutup_speakers(codec))
-		msleep(STARLABS_STARFIGHTER_SHUTUP_DELAY_MS);
-}
-
-static void alc233_fixup_starlabs_starfighter(struct hda_codec *codec,
-					      const struct hda_fixup *fix,
-					      int action)
-{
-	struct alc_spec *spec = codec->spec;
-
-	if (action == HDA_FIXUP_ACT_PRE_PROBE)
-		spec->shutup = starlabs_starfighter_shutup;
-}
-
 static void alc269_fixup_pincfg_no_hp_to_lineout(struct hda_codec *codec,
 						 const struct hda_fixup *fix, int action)
 {
@@ -1454,6 +1436,32 @@ static void alc274_hp_envy_pcm_hook(struct hda_pcm_stream *hinfo,
 	}
 }
 
+#define ALC233_STARFIGHTER_SPK_PIN	0x1b
+#define ALC233_STARFIGHTER_GPIO2	0x04
+
+static void alc233_starfighter_update_amp(struct hda_codec *codec, bool on)
+{
+	snd_hda_codec_write(codec, ALC233_STARFIGHTER_SPK_PIN, 0,
+			    AC_VERB_SET_EAPD_BTLENABLE,
+			    on ? AC_EAPDBTL_EAPD : 0);
+	alc_update_gpio_data(codec, ALC233_STARFIGHTER_GPIO2, on);
+}
+
+static void alc233_starfighter_pcm_hook(struct hda_pcm_stream *hinfo,
+					struct hda_codec *codec,
+					struct snd_pcm_substream *substream,
+					int action)
+{
+	switch (action) {
+	case HDA_GEN_PCM_ACT_PREPARE:
+		alc233_starfighter_update_amp(codec, true);
+		break;
+	case HDA_GEN_PCM_ACT_CLEANUP:
+		alc233_starfighter_update_amp(codec, false);
+		break;
+	}
+}
+
 static void alc274_fixup_hp_envy_gpio(struct hda_codec *codec,
 				      const struct hda_fixup *fix,
 				      int action)
@@ -1467,6 +1475,24 @@ static void alc274_fixup_hp_envy_gpio(struct hda_codec *codec,
 	}
 }
 
+static void alc233_fixup_starlabs_starfighter(struct hda_codec *codec,
+					      const struct hda_fixup *fix,
+					      int action)
+{
+	struct alc_spec *spec = codec->spec;
+
+	switch (action) {
+	case HDA_FIXUP_ACT_PRE_PROBE:
+		spec->gpio_mask |= ALC233_STARFIGHTER_GPIO2;
+		spec->gpio_dir |= ALC233_STARFIGHTER_GPIO2;
+		spec->gpio_data &= ~ALC233_STARFIGHTER_GPIO2;
+		break;
+	case HDA_FIXUP_ACT_PROBE:
+		spec->gen.pcm_playback_hook = alc233_starfighter_pcm_hook;
+		break;
+	}
+}
+
 static void alc_update_coef_led(struct hda_codec *codec,
 				struct alc_coef_led *led,
 				bool polarity, bool on)
@@ -4058,7 +4084,6 @@ enum {
 	ALC245_FIXUP_CLEVO_NOISY_MIC,
 	ALC269_FIXUP_VAIO_VJFH52_MIC_NO_PRESENCE,
 	ALC233_FIXUP_MEDION_MTL_SPK,
-	ALC233_FIXUP_STARLABS_STARFIGHTER,
 	ALC294_FIXUP_BASS_SPEAKER_15,
 	ALC283_FIXUP_DELL_HP_RESUME,
 	ALC294_FIXUP_ASUS_CS35L41_SPI_2,
@@ -4074,6 +4099,7 @@ enum {
 	ALC288_FIXUP_SURFACE_SWAP_DACS,
 	ALC236_FIXUP_HP_MUTE_LED_MICMUTE_GPIO,
 	ALC233_FIXUP_LENOVO_GPIO2_MIC_HOTKEY,
+	ALC233_FIXUP_STARLABS_STARFIGHTER,
 	ALC245_FIXUP_BASS_HP_DAC,
 	ALC245_FIXUP_ACER_MICMUTE_LED,
 };
-- 
2.51.0