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| author | Jaroslav Kysela <perex@perex.cz> | 2009-04-21 15:30:31 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2009-04-21 15:36:58 +0200 |
| commit | 30fd9940eee910d847f48bd8740b2d0eaa8d2cfc (patch) | |
| tree | cac55ee05fbf85d3e48ee1118a70ac07be59a97b | |
| parent | e10f9d87c9ac9fdfadb6305dbbc9052e49a02fdd (diff) | |
| download | op-kernel-dev-30fd9940eee910d847f48bd8740b2d0eaa8d2cfc.zip op-kernel-dev-30fd9940eee910d847f48bd8740b2d0eaa8d2cfc.tar.gz | |
[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 <perex@perex.cz>
| -rw-r--r-- | sound/pci/intel8x0.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c index 5dced5b..c4ba486 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); } |
