ALSA: hda - Refactor pm notification in hda_codec.c

No functional change.

- codec->pm_down_notified flag is renamed to codec->pm_up_notified
  flag (and takes the reversed meaning), which is managed solely in
  hda_call_pm_notify() now.

- The explicit call of hda_call_pm_notify() is moved into
  hda_keep_power_on().

- Removed a redundant call of hda_call_pm_notify() in
  snd_hda_power_up(), as it's called in hda_call_codec_resume()
  anyway.

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

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index bada677..8f7295b 100644 (file)
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -99,16 +99,24 @@ EXPORT_SYMBOL_HDA(snd_hda_delete_codec_preset);
 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)
-static inline void hda_call_pm_notify(struct hda_bus *bus, bool power_up)
+
+static void hda_call_pm_notify(struct hda_codec *codec, bool power_up)
 {
+       struct hda_bus *bus = codec->bus;
+
+       if ((power_up && codec->pm_up_notified) ||
+           (!power_up && !codec->pm_up_notified))
+               return;
        if (bus->ops.pm_notify)
                bus->ops.pm_notify(bus, power_up);
+       codec->pm_up_notified = power_up;
 }
+
 #else
 #define codec_in_pm(codec)     0
 static inline void hda_keep_power_on(struct hda_codec *codec) {}
 #define hda_codec_is_power_on(codec)   1
-#define hda_call_pm_notify(bus, state) {}
+#define hda_call_pm_notify(codec, state) {}
 #endif
 
 /**
@@ -1371,10 +1379,7 @@ static void snd_hda_codec_free(struct hda_codec *codec)
        codec->bus->caddr_tbl[codec->addr] = NULL;
        if (codec->patch_ops.free)
                codec->patch_ops.free(codec);
-#ifdef CONFIG_PM
-       if (!codec->pm_down_notified) /* cancel leftover refcounts */
-               hda_call_pm_notify(codec->bus, false);
-#endif
+       hda_call_pm_notify(codec, false); /* cancel leftover refcounts */
        unload_parser(codec);
        module_put(codec->owner);
        free_hda_cache(&codec->amp_cache);
@@ -1453,7 +1458,6 @@ int snd_hda_codec_new(struct hda_bus *bus,
         * phase.
         */
        hda_keep_power_on(codec);
-       hda_call_pm_notify(bus, true);
 #endif
 
        if (codec->bus->modelname) {
@@ -4058,10 +4062,6 @@ static void hda_call_codec_resume(struct hda_codec *codec)
         * in the resume / power-save sequence
         */
        hda_keep_power_on(codec);
-       if (codec->pm_down_notified) {
-               codec->pm_down_notified = 0;
-               hda_call_pm_notify(codec->bus, true);
-       }
        hda_set_power_state(codec, AC_PWRST_D0);
        restore_shutup_pins(codec);
        hda_exec_init_verbs(codec);
@@ -4935,11 +4935,8 @@ static void hda_power_work(struct work_struct *work)
        spin_unlock(&codec->power_lock);
 
        state = hda_call_codec_suspend(codec, true);
-       if (!codec->pm_down_notified &&
-           !bus->power_keep_link_on && (state & AC_PWRST_CLK_STOP_OK)) {
-               codec->pm_down_notified = 1;
-               hda_call_pm_notify(bus, false);
-       }
+       if (!bus->power_keep_link_on && (state & AC_PWRST_CLK_STOP_OK))
+               hda_call_pm_notify(codec, false);
 }
 
 static void hda_keep_power_on(struct hda_codec *codec)
@@ -4949,6 +4946,7 @@ static void hda_keep_power_on(struct hda_codec *codec)
        codec->power_on = 1;
        codec->power_jiffies = jiffies;
        spin_unlock(&codec->power_lock);
+       hda_call_pm_notify(codec, true);
 }
 
 /* update the power on/off account with the current jiffies */
@@ -4968,8 +4966,6 @@ void snd_hda_update_power_acct(struct hda_codec *codec)
 /* call this with codec->power_lock held! */
 static void __snd_hda_power_up(struct hda_codec *codec, bool wait_power_down)
 {
-       struct hda_bus *bus = codec->bus;
-
        /* Return if power_on or transitioning to power_on, unless currently
         * powering down. */
        if ((codec->power_on || codec->power_transition > 0) &&
@@ -4996,11 +4992,6 @@ static void __snd_hda_power_up(struct hda_codec *codec, bool wait_power_down)
        codec->power_transition = 1; /* avoid reentrance */
        spin_unlock(&codec->power_lock);
 
-       if (codec->pm_down_notified) {
-               codec->pm_down_notified = 0;
-               hda_call_pm_notify(bus, true);
-       }
-
        hda_call_codec_resume(codec);
 
        spin_lock(&codec->power_lock);

diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 14e4b5a..a3e5f45 100644 (file)
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -908,7 +908,7 @@ struct hda_codec {
 #ifdef CONFIG_PM
        unsigned int power_on :1;       /* current (global) power-state */
        unsigned int d3_stop_clk:1;     /* support D3 operation without BCLK */
-       unsigned int pm_down_notified:1; /* PM notified to controller */
+       unsigned int pm_up_notified:1;  /* PM notified to controller */
        unsigned int in_pm:1;           /* suspend/resume being performed */
        int power_transition;   /* power-state in transition */
        int power_count;        /* current (global) power refcount */