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Commit 30bdee02 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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

sound/pci/es1968.c

+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;

sound/pci/maestro3.c

+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);