From 30fd9940eee910d847f48bd8740b2d0eaa8d2cfc Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Tue, 21 Apr 2009 15:30:31 +0200 Subject: [PATCH] [ALSA] intel8x0: another attempt to fix ac97_clock measure routine Appearently, a big delay ~300ms is required before hw is settled and ready to transfer samples on some hardware variants. Also, return back "clocking to 48000Hz" message when something fails. Signed-off-by: Jaroslav Kysela --- sound/pci/intel8x0.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c index 5dced5b79387..c4ba486785c6 100644 --- a/sound/pci/intel8x0.c +++ b/sound/pci/intel8x0.c @@ -2751,11 +2751,12 @@ static void __devinit intel8x0_measure_ac97_clock(struct intel8x0 *chip) if (pos == 0) { snd_printk(KERN_ERR "intel8x0: measure - unreliable DMA position..\n"); __retry: - if (attempt < 2) { + if (attempt < 3) { + msleep(300); attempt++; goto __again; } - return; + goto __end; } pos /= 4; @@ -2782,6 +2783,7 @@ static void __devinit intel8x0_measure_ac97_clock(struct intel8x0 *chip) else if (pos < 47500 || pos > 48500) /* not 48000Hz, tuning the clock.. */ chip->ac97_bus->clock = (chip->ac97_bus->clock * 48000) / pos; + __end: printk(KERN_INFO "intel8x0: clocking to %d\n", chip->ac97_bus->clock); snd_ac97_update_power(chip->ac97[0], AC97_PCM_FRONT_DAC_RATE, 0); } -- 2.39.2