static int
via8233msgd_setspeed(kobj_t obj, void *data, u_int32_t speed)
{
struct via_chinfo *ch = data;
struct via_info *via = ch->parent;
if (via->codec_caps & AC97_EXTCAP_VRA)
return ac97_setrate(via->codec, AC97_REGEXT_FDACRATE, speed);
return 48000;
}
static int
viachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
{
struct via_chinfo *ch = data;
struct via_info *via = ch->parent;
int reg;
/*
* Basic AC'97 defines a 48 kHz sample rate only. For other rates,
* upsampling is required.
*
* The VT82C686A does not perform upsampling, and neither do we.
* If the codec supports variable-rate audio (i.e. does the upsampling
* itself), then negotiate the rate with the codec. Otherwise,
* return 48 kHz cuz that's all you got.
*/
if (via->codec_caps & AC97_EXTCAP_VRA) {
reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE;
return ac97_setrate(via->codec, reg, speed);
} else
return 48000;
}