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Commit 30bdee02 authored by Takashi Iwai's avatar Takashi Iwai
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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: default avatarTakashi Iwai <tiwai@suse.de>
parent 85e4d95d
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+11 −53
Original line number Diff line number Diff line
@@ -554,9 +554,8 @@ struct es1968 {
#else
	struct snd_kcontrol *master_switch; /* for h/w volume control */
	struct snd_kcontrol *master_volume;
	spinlock_t ac97_lock;
	struct tasklet_struct hwvol_tq;
#endif
	struct work_struct hwvol_work;

#ifdef CONFIG_SND_ES1968_RADIO
	struct snd_tea575x tea;
@@ -646,38 +645,23 @@ static int snd_es1968_ac97_wait_poll(struct es1968 *chip)
static void snd_es1968_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
{
	struct es1968 *chip = ac97->private_data;
#ifndef CONFIG_SND_ES1968_INPUT
	unsigned long flags;
#endif

	snd_es1968_ac97_wait(chip);

	/* Write the bus */
#ifndef CONFIG_SND_ES1968_INPUT
	spin_lock_irqsave(&chip->ac97_lock, flags);
#endif
	outw(val, chip->io_port + ESM_AC97_DATA);
	/*msleep(1);*/
	outb(reg, chip->io_port + ESM_AC97_INDEX);
	/*msleep(1);*/
#ifndef CONFIG_SND_ES1968_INPUT
	spin_unlock_irqrestore(&chip->ac97_lock, flags);
#endif
}

static unsigned short snd_es1968_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
{
	u16 data = 0;
	struct es1968 *chip = ac97->private_data;
#ifndef CONFIG_SND_ES1968_INPUT
	unsigned long flags;
#endif

	snd_es1968_ac97_wait(chip);

#ifndef CONFIG_SND_ES1968_INPUT
	spin_lock_irqsave(&chip->ac97_lock, flags);
#endif
	outb(reg | 0x80, chip->io_port + ESM_AC97_INDEX);
	/*msleep(1);*/

@@ -685,9 +669,6 @@ static unsigned short snd_es1968_ac97_read(struct snd_ac97 *ac97, unsigned short
		data = inw(chip->io_port + ESM_AC97_DATA);
		/*msleep(1);*/
	}
#ifndef CONFIG_SND_ES1968_INPUT
	spin_unlock_irqrestore(&chip->ac97_lock, flags);
#endif

	return data;
}
@@ -1904,13 +1885,10 @@ static void snd_es1968_update_pcm(struct es1968 *chip, struct esschan *es)
   (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 es1968_update_hw_volume(unsigned long private_data)
static void es1968_update_hw_volume(struct work_struct *work)
{
	struct es1968 *chip = (struct es1968 *) private_data;
	struct es1968 *chip = container_of(work, struct es1968, hwvol_work);
	int x, val;
#ifndef CONFIG_SND_ES1968_INPUT
	unsigned long flags;
#endif

	/* Figure out which volume control button was pushed,
	   based on differences from the default register
@@ -1929,18 +1907,11 @@ static void es1968_update_hw_volume(unsigned long private_data)
	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];
	val = snd_ac97_read(chip->ac97, AC97_MASTER);
	switch (x) {
	case 0x88:
		/* mute */
		val ^= 0x8000;
		chip->ac97->regs[AC97_MASTER] = val;
		outw(val, chip->io_port + ESM_AC97_DATA);
		outb(AC97_MASTER, chip->io_port + ESM_AC97_INDEX);
		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &chip->master_switch->id);
		break;
	case 0xaa:
		/* volume up */
@@ -1948,11 +1919,6 @@ static void es1968_update_hw_volume(unsigned long private_data)
			val--;
		if ((val & 0x7f00) > 0)
			val -= 0x0100;
		chip->ac97->regs[AC97_MASTER] = val;
		outw(val, chip->io_port + ESM_AC97_DATA);
		outb(AC97_MASTER, chip->io_port + ESM_AC97_INDEX);
		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &chip->master_volume->id);
		break;
	case 0x66:
		/* volume down */
@@ -1960,14 +1926,11 @@ static void es1968_update_hw_volume(unsigned long private_data)
			val++;
		if ((val & 0x7f00) < 0x1f00)
			val += 0x0100;
		chip->ac97->regs[AC97_MASTER] = val;
		outw(val, chip->io_port + ESM_AC97_DATA);
		outb(AC97_MASTER, chip->io_port + ESM_AC97_INDEX);
		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_volume->id);
#else
	if (!chip->input_dev)
		return;
@@ -2013,11 +1976,7 @@ static irqreturn_t snd_es1968_interrupt(int irq, void *dev_id)
	outw(inw(chip->io_port + 4) & 1, chip->io_port + 4);

	if (event & ESM_HWVOL_IRQ)
#ifdef CONFIG_SND_ES1968_INPUT
		es1968_update_hw_volume((unsigned long)chip);
#else
		tasklet_schedule(&chip->hwvol_tq); /* we'll do this later */
#endif
		schedule_work(&chip->hwvol_work);

	/* else ack 'em all, i imagine */
	outb(0xFF, chip->io_port + 0x1A);
@@ -2426,6 +2385,7 @@ static int es1968_suspend(struct pci_dev *pci, pm_message_t state)
		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);
@@ -2638,6 +2598,7 @@ static struct snd_tea575x_ops snd_es1968_tea_ops = {

static int snd_es1968_free(struct es1968 *chip)
{
	cancel_work_sync(&chip->hwvol_work);
#ifdef CONFIG_SND_ES1968_INPUT
	if (chip->input_dev)
		input_unregister_device(chip->input_dev);
@@ -2728,10 +2689,7 @@ static int __devinit snd_es1968_create(struct snd_card *card,
	INIT_LIST_HEAD(&chip->buf_list);
	INIT_LIST_HEAD(&chip->substream_list);
	mutex_init(&chip->memory_mutex);
#ifndef CONFIG_SND_ES1968_INPUT
	spin_lock_init(&chip->ac97_lock);
	tasklet_init(&chip->hwvol_tq, es1968_update_hw_volume, (unsigned long)chip);
#endif
	INIT_WORK(&chip->hwvol_work, es1968_update_hw_volume);
	chip->card = card;
	chip->pci = pci;
	chip->irq = -1;
+12 −59
Original line number Diff line number Diff line
@@ -850,11 +850,10 @@ struct snd_m3 {
	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 @@ static void snd_m3_update_ptr(struct snd_m3 *chip, struct m3_dma *s)
   (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 @@ static void snd_m3_update_hw_volume(unsigned long private_data)
	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 @@ static void snd_m3_update_hw_volume(unsigned long private_data)
			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 @@ static void snd_m3_update_hw_volume(unsigned long private_data)
			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 @@ static irqreturn_t snd_m3_interrupt(int irq, void *dev_id)
		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 @@ static unsigned short
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 @@ static void
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 @@ static int snd_m3_free(struct snd_m3 *chip)
	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 @@ static int m3_suspend(struct pci_dev *pci, pm_message_t state)
		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 @@ snd_m3_create(struct snd_card *card, struct pci_dev *pci,
	}

	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 @@ snd_m3_create(struct snd_card *card, struct pci_dev *pci,
	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_create(struct snd_card *card, struct pci_dev *pci,

	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);