From d44c39acafff98590b9bcdecb44dbbc3f7714b4a Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Wed, 19 Oct 2005 14:39:48 +0200 Subject: [PATCH] [ALSA] ymfpci: change timer resolution to 48 kHz Modules: YMFPCI driver We better pretend that the ymfpci timer runs at 48 kHz because the interrupt frequency cannot be higher, and clients that would try to use 96 kHz would run at half their desired speed. Signed-off-by: Clemens Ladisch --- sound/pci/ymfpci/ymfpci_main.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c index c0aaade772d4..d27f3b56b513 100644 --- a/sound/pci/ymfpci/ymfpci_main.c +++ b/sound/pci/ymfpci/ymfpci_main.c @@ -1851,9 +1851,7 @@ static int snd_ymfpci_timer_start(snd_timer_t *timer) unsigned int count; chip = snd_timer_chip(timer); - count = timer->sticks - 1; - if (count == 0) /* minimum time is 20.8 us */ - count = 1; + count = (timer->sticks << 1) - 1; spin_lock_irqsave(&chip->reg_lock, flags); snd_ymfpci_writew(chip, YDSXGR_TIMERCOUNT, count); snd_ymfpci_writeb(chip, YDSXGR_TIMERCTRL, 0x03); @@ -1877,14 +1875,14 @@ static int snd_ymfpci_timer_precise_resolution(snd_timer_t *timer, unsigned long *num, unsigned long *den) { *num = 1; - *den = 96000; + *den = 48000; return 0; } static struct _snd_timer_hardware snd_ymfpci_timer_hw = { .flags = SNDRV_TIMER_HW_AUTO, - .resolution = 10417, /* 1/2fs = 10.41666...us */ - .ticks = 65536, + .resolution = 20833, /* 1/fs = 20.8333...us */ + .ticks = 0x8000, .start = snd_ymfpci_timer_start, .stop = snd_ymfpci_timer_stop, .precise_resolution = snd_ymfpci_timer_precise_resolution, -- 2.39.5