ALSA: hda - Add post_suspend patch ops

Add a new ops, post_suspend(), which is called after suspend() ops is
performed.  This is called only in the case of the real PM suspend, and
the codec driver can use this for further changing of D-state or
clearing the LED, etc.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.c

@@ -91,8 +91,10 @@ EXPORT_SYMBOL_HDA(snd_hda_delete_codec_preset);
 #ifdef CONFIG_SND_HDA_POWER_SAVE
 static void hda_power_work(struct work_struct *work);
 static void hda_keep_power_on(struct hda_codec *codec);
+#define hda_codec_is_power_on(codec)	((codec)->power_on)
 #else
 static inline void hda_keep_power_on(struct hda_codec *codec) {}
+#define hda_codec_is_power_on(codec)	1
 #endif
 
 /**
@@ -4376,11 +4378,8 @@ void snd_hda_bus_reboot_notify(struct hda_bus *bus)
 	if (!bus)
 		return;
 	list_for_each_entry(codec, &bus->codec_list, list) {
-#ifdef CONFIG_SND_HDA_POWER_SAVE
-		if (!codec->power_on)
-			continue;
-#endif
-		if (codec->patch_ops.reboot_notify)
+		if (hda_codec_is_power_on(codec) &&
+		    codec->patch_ops.reboot_notify)
 			codec->patch_ops.reboot_notify(codec);
 	}
 }
@@ -5079,11 +5078,10 @@ int snd_hda_suspend(struct hda_bus *bus)
 	struct hda_codec *codec;
 
 	list_for_each_entry(codec, &bus->codec_list, list) {
-#ifdef CONFIG_SND_HDA_POWER_SAVE
-		if (!codec->power_on)
-			continue;
-#endif
-		hda_call_codec_suspend(codec);
+		if (hda_codec_is_power_on(codec))
+			hda_call_codec_suspend(codec);
+		if (codec->patch_ops.post_suspend)
+			codec->patch_ops.post_suspend(codec);
 	}
 	return 0;
 }

sound/pci/hda/hda_codec.h

@@ -702,6 +702,7 @@ struct hda_codec_ops {
 	void (*unsol_event)(struct hda_codec *codec, unsigned int res);
 #ifdef CONFIG_PM
 	int (*suspend)(struct hda_codec *codec, pm_message_t state);
+	int (*post_suspend)(struct hda_codec *codec);
 	int (*pre_resume)(struct hda_codec *codec);
 	int (*resume)(struct hda_codec *codec);
 #endif