ALSA: hda: Add powerdown for Analog Devices HDA codecs

This patch ports powerdown fixes to AD198x. Currently we only turn off
Front and HP for suspend, but this is easily extended for additional
nids.

Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_analog.c

@@ -441,6 +441,11 @@ static int ad198x_build_pcms(struct hda_codec *codec)
 	return 0;
 }
 
+static inline void ad198x_shutup(struct hda_codec *codec)
+{
+	snd_hda_shutup_pins(codec);
+}
+
 static void ad198x_free_kctls(struct hda_codec *codec)
 {
 	struct ad198x_spec *spec = codec->spec;
@@ -454,18 +459,76 @@ static void ad198x_free_kctls(struct hda_codec *codec)
 	snd_array_free(&spec->kctls);
 }
 
+static void ad198x_power_eapd_write(struct hda_codec *codec, hda_nid_t front,
+				hda_nid_t hp)
+{
+	struct ad198x_spec *spec = codec->spec;
+	snd_hda_codec_write(codec, front, 0, AC_VERB_SET_EAPD_BTLENABLE,
+			    !spec->inv_eapd ? 0x00 : 0x02);
+	snd_hda_codec_write(codec, hp, 0, AC_VERB_SET_EAPD_BTLENABLE,
+			    !spec->inv_eapd ? 0x00 : 0x02);
+}
+
+static void ad198x_power_eapd(struct hda_codec *codec)
+{
+	/* We currently only handle front, HP */
+	switch (codec->vendor_id) {
+	case 0x11d41882:
+	case 0x11d4882a:
+	case 0x11d41884:
+	case 0x11d41984:
+	case 0x11d41883:
+	case 0x11d4184a:
+	case 0x11d4194a:
+	case 0x11d4194b:
+		ad198x_power_eapd_write(codec, 0x12, 0x11);
+		break;
+	case 0x11d41981:
+	case 0x11d41983:
+		ad198x_power_eapd_write(codec, 0x05, 0x06);
+		break;
+	case 0x11d41986:
+		ad198x_power_eapd_write(codec, 0x1b, 0x1a);
+		break;
+	case 0x11d41988:
+	case 0x11d4198b:
+	case 0x11d4989a:
+	case 0x11d4989b:
+		ad198x_power_eapd_write(codec, 0x29, 0x22);
+		break;
+	}
+}
+
 static void ad198x_free(struct hda_codec *codec)
 {
 	struct ad198x_spec *spec = codec->spec;
 
 	if (!spec)
 		return;
 
+	ad198x_shutup(codec);
 	ad198x_free_kctls(codec);
 	kfree(spec);
 	snd_hda_detach_beep_device(codec);
 }
 
+#ifdef SND_HDA_NEEDS_RESUME
+static int ad198x_suspend(struct hda_codec *codec, pm_message_t state)
+{
+	ad198x_shutup(codec);
+	ad198x_power_eapd(codec);
+	return 0;
+}
+
+static int ad198x_resume(struct hda_codec *codec)
+{
+	ad198x_init(codec);
+	snd_hda_codec_resume_amp(codec);
+	snd_hda_codec_resume_cache(codec);
+	return 0;
+}
+#endif
+
 static struct hda_codec_ops ad198x_patch_ops = {
 	.build_controls = ad198x_build_controls,
 	.build_pcms = ad198x_build_pcms,
@@ -474,6 +537,11 @@ static struct hda_codec_ops ad198x_patch_ops = {
 #ifdef CONFIG_SND_HDA_POWER_SAVE
 	.check_power_status = ad198x_check_power_status,
 #endif
+#ifdef SND_HDA_NEEDS_RESUME
+	.suspend = ad198x_suspend,
+	.resume = ad198x_resume,
+#endif
+	.reboot_notify = ad198x_shutup,
 };