ALSA: hda - Clean up async codec PM using standard async infrastructure

This simplifies lots of codes indeed.

Tested-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 19 insertions, 51 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 5b7622034eee..2e090c8d7144 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -26,6 +26,7 @@
 #include <linux/pci.h>
 #include <linux/mutex.h>
 #include <linux/module.h>
+#include <linux/async.h>
 #include <sound/core.h>
 #include "hda_codec.h"
 #include <sound/asoundef.h>
@@ -96,8 +97,6 @@ EXPORT_SYMBOL_HDA(snd_hda_delete_codec_preset);
 
 #ifdef CONFIG_PM
 #define codec_in_pm(codec)      ((codec)->in_pm)
-static void hda_suspend_work(struct work_struct *work);
-static void hda_resume_work(struct work_struct *work);
 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)
@@ -842,11 +841,6 @@ static int snd_hda_bus_free(struct hda_bus *bus)
         if (bus->workq)
                 destroy_workqueue(bus->workq);
 
-#ifdef CONFIG_PM
-        if (bus->pm_wq)
-                destroy_workqueue(bus->pm_wq);
-#endif
-
         kfree(bus);
         return 0;
 }
@@ -891,9 +885,6 @@ int snd_hda_bus_new(struct snd_card *card,
                 .dev_register = snd_hda_bus_dev_register,
                 .dev_free = snd_hda_bus_dev_free,
         };
-#ifdef CONFIG_PM
-        char wqname[16];
-#endif
 
         if (snd_BUG_ON(!temp))
                 return -EINVAL;
@@ -930,16 +921,6 @@ int snd_hda_bus_new(struct snd_card *card,
                 return -ENOMEM;
         }
 
-#ifdef CONFIG_PM
-        sprintf(wqname, "hda-pm-wq-%d", card->number);
-        bus->pm_wq = create_workqueue(wqname);
-        if (!bus->pm_wq) {
-                snd_printk(KERN_ERR "cannot create PM workqueue\n");
-                snd_hda_bus_free(bus);
-                return -ENOMEM;
-        }
-#endif
-
         err = snd_device_new(card, SNDRV_DEV_BUS, bus, &dev_ops);
         if (err < 0) {
                 snd_hda_bus_free(bus);
@@ -1476,8 +1457,6 @@ int snd_hda_codec_new(struct hda_bus *bus,
 #ifdef CONFIG_PM
         spin_lock_init(&codec->power_lock);
         INIT_DELAYED_WORK(&codec->power_work, hda_power_work);
-        INIT_WORK(&codec->suspend_work, hda_suspend_work);
-        INIT_WORK(&codec->resume_work, hda_resume_work);
         /* snd_hda_codec_new() marks the codec as power-up, and leave it as is.
          * the caller has to power down appropriatley after initialization
          * phase.
@@ -1495,9 +1474,6 @@ int snd_hda_codec_new(struct hda_bus *bus,
 
         list_add_tail(&codec->list, &bus->codec_list);
         bus->num_codecs++;
-#ifdef CONFIG_PM
-        workqueue_set_max_active(bus->pm_wq, bus->num_codecs);
-#endif
 
         bus->caddr_tbl[codec_addr] = codec;
 
@@ -5120,22 +5096,6 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec,
         return 0;
 }
 EXPORT_SYMBOL_HDA(snd_hda_check_amp_list_power);
-
-static void hda_suspend_work(struct work_struct *work)
-{
-        struct hda_codec *codec =
-                container_of(work, struct hda_codec, suspend_work);
-
-        hda_call_codec_suspend(codec, false);
-}
-
-static void hda_resume_work(struct work_struct *work)
-{
-        struct hda_codec *codec =
-                container_of(work, struct hda_codec, resume_work);
-
-        hda_call_codec_resume(codec);
-}
 #endif
 
 /*
@@ -5699,6 +5659,17 @@ EXPORT_SYMBOL_HDA(snd_hda_add_imux_item);
  * power management
  */
 
+
+static void hda_async_suspend(void *data, async_cookie_t cookie)
+{
+        hda_call_codec_suspend(data, false);
+}
+
+static void hda_async_resume(void *data, async_cookie_t cookie)
+{
+        hda_call_codec_resume(data);
+}
+
 /**
  * snd_hda_suspend - suspend the codecs
  * @bus: the HDA bus
@@ -5708,19 +5679,21 @@ EXPORT_SYMBOL_HDA(snd_hda_add_imux_item);
 int snd_hda_suspend(struct hda_bus *bus)
 {
         struct hda_codec *codec;
+        ASYNC_DOMAIN_EXCLUSIVE(domain);
 
         list_for_each_entry(codec, &bus->codec_list, list) {
                 cancel_delayed_work_sync(&codec->jackpoll_work);
                 if (hda_codec_is_power_on(codec)) {
                         if (bus->num_codecs > 1)
-                                queue_work(bus->pm_wq, &codec->suspend_work);
+                                async_schedule_domain(hda_async_suspend, codec,
+                                                      &domain);
                         else
                                 hda_call_codec_suspend(codec, false);
                 }
         }
 
         if (bus->num_codecs > 1)
-                flush_workqueue(bus->pm_wq);
+                async_synchronize_full_domain(&domain);
 
         return 0;
 }
@@ -5735,16 +5708,17 @@ EXPORT_SYMBOL_HDA(snd_hda_suspend);
 int snd_hda_resume(struct hda_bus *bus)
 {
         struct hda_codec *codec;
+        ASYNC_DOMAIN_EXCLUSIVE(domain);
 
         list_for_each_entry(codec, &bus->codec_list, list) {
                 if (bus->num_codecs > 1)
-                        queue_work(bus->pm_wq, &codec->resume_work);
+                        async_schedule_domain(hda_async_resume, codec, &domain);
                 else
                         hda_call_codec_resume(codec);
         }
 
         if (bus->num_codecs > 1)
-                flush_workqueue(bus->pm_wq);
+                async_synchronize_full_domain(&domain);
 
         return 0;
 }
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 3ab4834761a8..260b190adf74 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -684,9 +684,6 @@ struct hda_bus {
         struct hda_bus_unsolicited *unsol;
         char workq_name[16];
         struct workqueue_struct *workq; /* common workqueue for codecs */
-#ifdef CONFIG_PM
-        struct workqueue_struct *pm_wq; /* workqueue to parallel codec PM */
-#endif
 
         /* assigned PCMs */
         DECLARE_BITMAP(pcm_dev_bits, SNDRV_PCM_DEVICES);
@@ -921,9 +918,6 @@ struct hda_codec {
         unsigned long power_off_acct;
         unsigned long power_jiffies;
         spinlock_t power_lock;
-        /* tasks to parallel multi-codec suspend/resume */
-        struct work_struct suspend_work;
-        struct work_struct resume_work;
 #endif
 
         /* filter the requested power state per nid */