[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>

diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index 5dced5b793873409f32bd20f3e06588de8dfb662..c4ba486785c68e58e9f4b60f5413df8309800648 100644 (file)
--- 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);
 }