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Delay the AC97 calibration until after the system clock has been

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calibrated.  This fixes the problem where playback and recording do
not run at the correct speed.  It probably also eliminates the
need for the hacks/workarounds/sysctl's that were previously
devised to deal with this, but I will leave that for a different
time.

Reviewed by:	orion
This commit is contained in:
Scott Long 2002-06-27 22:36:01 +00:00
parent db5fd092db
commit f4df40b218
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=98940
1 changed files with 22 additions and 5 deletions
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27
sys/dev/sound/pci/ich.c
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@ -85,6 +85,8 @@ struct sc_info {
struct sc_chinfo ch[3];
int ac97rate;
struct ich_desc *dtbl;
struct intr_config_hook intrhook;
int use_intrhook;
};
/* -------------------------------------------------------------------- */
@ -455,13 +457,20 @@ ich_initsys(struct sc_info* sc)
/* Calibrate card (some boards are overclocked and need scaling) */
static
unsigned int ich_calibrate(struct sc_info *sc)
void ich_calibrate(void *arg)
{
struct sc_chinfo *ch = &sc->ch[1];
struct sc_info *sc;
struct sc_chinfo *ch;
struct timeval t1, t2;
u_int8_t ociv, nciv;
u_int32_t wait_us, actual_48k_rate, bytes;
sc = (struct sc_info *)arg;
ch = &sc->ch[1];
if (sc->use_intrhook)
config_intrhook_disestablish(&sc->intrhook);
/*
* Grab audio from input for fixed interval and compare how
* much we actually get with what we expect. Interval needs
@ -516,7 +525,7 @@ unsigned int ich_calibrate(struct sc_info *sc)
if (nciv == ociv) {
device_printf(sc->dev, "ac97 link rate calibration timed out after %d us\n", wait_us);
return 0;
return;
}
actual_48k_rate = (bytes * 250000) / wait_us;
@ -534,7 +543,7 @@ unsigned int ich_calibrate(struct sc_info *sc)
printf("\n");
}
return sc->ac97rate;
return;
}
/* -------------------------------------------------------------------- */
@ -708,7 +717,15 @@ ich_pci_attach(device_t dev)
pcm_setstatus(dev, status);
ich_initsys(sc);
ich_calibrate(sc);
sc->intrhook.ich_func = ich_calibrate;
sc->intrhook.ich_arg = sc;
sc->use_intrhook = 1;
if (config_intrhook_establish(&sc->intrhook) != 0) {
device_printf(dev, "Cannot establish calibration hook, will calibrate now\n");
sc->use_intrhook = 0;
ich_calibrate(sc);
}
return 0;