ALSA: es1968,maestro3 - Use work for hw-volume control
Instead of tasklet, use workq for handling the hw-volume control.
This reduces lots of spinlocks.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c
index 64f6f62..0378126 100644
--- a/sound/pci/maestro3.c
+++ b/sound/pci/maestro3.c
@@ -850,11 +850,10 @@
struct input_dev *input_dev;
char phys[64]; /* physical device path */
#else
- spinlock_t ac97_lock;
struct snd_kcontrol *master_switch;
struct snd_kcontrol *master_volume;
- struct tasklet_struct hwvol_tq;
#endif
+ struct work_struct hwvol_work;
unsigned int in_suspend;
@@ -1609,13 +1608,10 @@
(without wrap around) in response to volume button presses and then
generating an interrupt. The pair of counters is stored in bits 1-3 and 5-7
of a byte wide register. The meaning of bits 0 and 4 is unknown. */
-static void snd_m3_update_hw_volume(unsigned long private_data)
+static void snd_m3_update_hw_volume(struct work_struct *work)
{
- struct snd_m3 *chip = (struct snd_m3 *) private_data;
+ struct snd_m3 *chip = container_of(work, struct snd_m3, hwvol_work);
int x, val;
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- unsigned long flags;
-#endif
/* Figure out which volume control button was pushed,
based on differences from the default register
@@ -1645,21 +1641,13 @@
if (!chip->master_switch || !chip->master_volume)
return;
- /* FIXME: we can't call snd_ac97_* functions since here is in tasklet. */
- spin_lock_irqsave(&chip->ac97_lock, flags);
-
- val = chip->ac97->regs[AC97_MASTER_VOL];
+ val = snd_ac97_read(chip->ac97, AC97_MASTER);
switch (x) {
case 0x88:
/* The counters have not changed, yet we've received a HV
interrupt. According to tests run by various people this
happens when pressing the mute button. */
val ^= 0x8000;
- chip->ac97->regs[AC97_MASTER_VOL] = val;
- outw(val, chip->iobase + CODEC_DATA);
- outb(AC97_MASTER_VOL, chip->iobase + CODEC_COMMAND);
- snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
- &chip->master_switch->id);
break;
case 0xaa:
/* counters increased by 1 -> volume up */
@@ -1667,11 +1655,6 @@
val--;
if ((val & 0x7f00) > 0)
val -= 0x0100;
- chip->ac97->regs[AC97_MASTER_VOL] = val;
- outw(val, chip->iobase + CODEC_DATA);
- outb(AC97_MASTER_VOL, chip->iobase + CODEC_COMMAND);
- snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
- &chip->master_volume->id);
break;
case 0x66:
/* counters decreased by 1 -> volume down */
@@ -1679,14 +1662,11 @@
val++;
if ((val & 0x7f00) < 0x1f00)
val += 0x0100;
- chip->ac97->regs[AC97_MASTER_VOL] = val;
- outw(val, chip->iobase + CODEC_DATA);
- outb(AC97_MASTER_VOL, chip->iobase + CODEC_COMMAND);
- snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
- &chip->master_volume->id);
break;
}
- spin_unlock_irqrestore(&chip->ac97_lock, flags);
+ if (snd_ac97_update(chip->ac97, AC97_MASTER, val))
+ snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+ &chip->master_switch->id);
#else
if (!chip->input_dev)
return;
@@ -1730,11 +1710,7 @@
return IRQ_NONE;
if (status & HV_INT_PENDING)
-#ifdef CONFIG_SND_MAESTRO3_INPUT
- snd_m3_update_hw_volume((unsigned long)chip);
-#else
- tasklet_schedule(&chip->hwvol_tq);
-#endif
+ schedule_work(&chip->hwvol_work);
/*
* ack an assp int if its running
@@ -2000,24 +1976,14 @@
snd_m3_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
{
struct snd_m3 *chip = ac97->private_data;
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- unsigned long flags;
-#endif
unsigned short data = 0xffff;
if (snd_m3_ac97_wait(chip))
goto fail;
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- spin_lock_irqsave(&chip->ac97_lock, flags);
-#endif
snd_m3_outb(chip, 0x80 | (reg & 0x7f), CODEC_COMMAND);
if (snd_m3_ac97_wait(chip))
- goto fail_unlock;
+ goto fail;
data = snd_m3_inw(chip, CODEC_DATA);
-fail_unlock:
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- spin_unlock_irqrestore(&chip->ac97_lock, flags);
-#endif
fail:
return data;
}
@@ -2026,20 +1992,11 @@
snd_m3_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
{
struct snd_m3 *chip = ac97->private_data;
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- unsigned long flags;
-#endif
if (snd_m3_ac97_wait(chip))
return;
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- spin_lock_irqsave(&chip->ac97_lock, flags);
-#endif
snd_m3_outw(chip, val, CODEC_DATA);
snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND);
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- spin_unlock_irqrestore(&chip->ac97_lock, flags);
-#endif
}
@@ -2458,6 +2415,7 @@
struct m3_dma *s;
int i;
+ cancel_work_sync(&chip->hwvol_work);
#ifdef CONFIG_SND_MAESTRO3_INPUT
if (chip->input_dev)
input_unregister_device(chip->input_dev);
@@ -2511,6 +2469,7 @@
return 0;
chip->in_suspend = 1;
+ cancel_work_sync(&chip->hwvol_work);
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
snd_pcm_suspend_all(chip->pcm);
snd_ac97_suspend(chip->ac97);
@@ -2667,9 +2626,6 @@
}
spin_lock_init(&chip->reg_lock);
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- spin_lock_init(&chip->ac97_lock);
-#endif
switch (pci->device) {
case PCI_DEVICE_ID_ESS_ALLEGRO:
@@ -2683,6 +2639,7 @@
chip->card = card;
chip->pci = pci;
chip->irq = -1;
+ INIT_WORK(&chip->hwvol_work, snd_m3_update_hw_volume);
chip->external_amp = enable_amp;
if (amp_gpio >= 0 && amp_gpio <= 0x0f)
@@ -2752,10 +2709,6 @@
snd_m3_hv_init(chip);
-#ifndef CONFIG_SND_MAESTRO3_INPUT
- tasklet_init(&chip->hwvol_tq, snd_m3_update_hw_volume, (unsigned long)chip);
-#endif
-
if (request_irq(pci->irq, snd_m3_interrupt, IRQF_SHARED,
KBUILD_MODNAME, chip)) {
snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);