ALSA: hda/realtek - Support low power consumption for ALC256

Remove hp_pin = 0 return. Add the default pin 0x21 as headphone.
Supported low power consumption, it must do depop procedure when
headset jack was plugged or unplugged.
So, alc256_init() and alc256_shutup() must run delay when headset jack
was plugged or unplugged.
If depop procedure not run with delay, it will have a chance to let
power consumption raise high.

[ NOTE: this is a quite quite similar change for ALC295 by commit
  d3ba58bb ("ALSA: hda/realtek - Support low power consumption for
  ALC295"), but applied to ALC256 codec instead -- tiwai ]

Fixes: 8983eb60 ("ALSA: hda/realtek - Move to ACT_INIT state")
Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -3197,7 +3197,7 @@ static void alc256_init(struct hda_codec *codec)
 	bool hp_pin_sense;
 
 	if (!hp_pin)
-		return;
+		hp_pin = 0x21;
 
 	msleep(30);
 
@@ -3207,17 +3207,25 @@ static void alc256_init(struct hda_codec *codec)
 		msleep(2);
 
 	alc_update_coefex_idx(codec, 0x57, 0x04, 0x0007, 0x1); /* Low power */
+	if (spec->ultra_low_power) {
+		alc_update_coef_idx(codec, 0x03, 1<<1, 1<<1);
+		alc_update_coef_idx(codec, 0x08, 3<<2, 3<<2);
+		alc_update_coef_idx(codec, 0x08, 7<<4, 0);
+		alc_update_coef_idx(codec, 0x3b, 1<<15, 0);
+		alc_update_coef_idx(codec, 0x0e, 7<<6, 7<<6);
+		msleep(30);
+	}
 
 	snd_hda_codec_write(codec, hp_pin, 0,
 			    AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
 
-	if (hp_pin_sense)
+	if (hp_pin_sense || spec->ultra_low_power)
 		msleep(85);
 
 	snd_hda_codec_write(codec, hp_pin, 0,
 			    AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);
 
-	if (hp_pin_sense)
+	if (hp_pin_sense || spec->ultra_low_power)
 		msleep(100);
 
 	alc_update_coef_idx(codec, 0x46, 3 << 12, 0);
@@ -3232,10 +3240,8 @@ static void alc256_shutup(struct hda_codec *codec)
 	hda_nid_t hp_pin = alc_get_hp_pin(spec);
 	bool hp_pin_sense;
 
-	if (!hp_pin) {
-		alc269_shutup(codec);
-		return;
-	}
+	if (!hp_pin)
+		hp_pin = 0x21;
 
 	hp_pin_sense = snd_hda_jack_detect(codec, hp_pin);
 
@@ -3245,7 +3251,7 @@ static void alc256_shutup(struct hda_codec *codec)
 	snd_hda_codec_write(codec, hp_pin, 0,
 			    AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
 
-	if (hp_pin_sense)
+	if (hp_pin_sense || spec->ultra_low_power)
 		msleep(85);
 
 	/* 3k pull low control for Headset jack. */
@@ -3256,11 +3262,20 @@ static void alc256_shutup(struct hda_codec *codec)
 		snd_hda_codec_write(codec, hp_pin, 0,
 				    AC_VERB_SET_PIN_WIDGET_CONTROL, 0x0);
 
-	if (hp_pin_sense)
+	if (hp_pin_sense || spec->ultra_low_power)
 		msleep(100);
 
 	alc_auto_setup_eapd(codec, false);
 	alc_shutup_pins(codec);
+	if (spec->ultra_low_power) {
+		msleep(50);
+		alc_update_coef_idx(codec, 0x03, 1<<1, 0);
+		alc_update_coef_idx(codec, 0x08, 7<<4, 7<<4);
+		alc_update_coef_idx(codec, 0x08, 3<<2, 0);
+		alc_update_coef_idx(codec, 0x3b, 1<<15, 1<<15);
+		alc_update_coef_idx(codec, 0x0e, 7<<6, 0);
+		msleep(30);
+	}
 }
 
 static void alc225_init(struct hda_codec *codec)