From 30bdee0259093e114c711943902c834e5c3326c5 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 14 Jun 2011 13:57:02 +0200 Subject: 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 --- sound/pci/maestro3.c | 71 +++++++++------------------------------------------- 1 file changed, 12 insertions(+), 59 deletions(-) (limited to 'sound/pci/maestro3.c') diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c index 64f6f627f4c2..0378126e6272 100644 --- a/sound/pci/maestro3.c +++ b/sound/pci/maestro3.c @@ -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); -- cgit v1.2.3-59-g8ed1b