Re: [Fwd: Re: newer C-Media CMI9761A], No PCM Master slider functional

[thomas schorpp <t.schorpp@gmx.de>]

ok. got the pcm master slider. no function.

if the bitsetting is correct, theres no hardware gain driver for pcm 
master on the chip.

so back to head cvs and find out whats wrong with the pcm sound with 
patch_9761().

tom

static void check_volume_resolution(ac97_t *ac97, int reg, unsigned char 
*lo_max, unsigned char *hi_max)
{
	unsigned short cbit[3] = { 0x20, 0x10, 0x01 };
	unsigned char max[3] = { 63, 31, 15 };
	int i;

	*lo_max = *hi_max = 0;
	for (i = 0 ; i < ARRAY_SIZE(cbit); i++) {
		unsigned short val;
		snd_ac97_write(ac97, reg, 0x8080 | cbit[i] | (cbit[i] << 8));
		val = snd_ac97_read(ac97, reg);
		if (! *lo_max && (val & cbit[i]))
			*lo_max = max[i];
		if (! *hi_max && (val & (cbit[i] << 8)))
			*hi_max = max[i];
		if (*lo_max && *hi_max)
			break;
	}
	snd_printk (KERN_ERR "vol res reg %d hi %d low %d\n", reg, *lo_max, 
*hi_max);
	*lo_max = 31; *hi_max = 31;
}


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