EXPORT_SYMBOL_HDA(snd_hda_codec_resume_amp);
#endif /* SND_HDA_NEEDS_RESUME */
+static u32 get_amp_max_value(struct hda_codec *codec, hda_nid_t nid, int dir,
+ unsigned int ofs)
+{
+ u32 caps = query_amp_caps(codec, nid, dir);
+ /* get num steps */
+ caps = (caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT;
+ if (ofs < caps)
+ caps -= ofs;
+ return caps;
+}
+
/**
* snd_hda_mixer_amp_volume_info - Info callback for a standard AMP mixer
*
u8 chs = get_amp_channels(kcontrol);
int dir = get_amp_direction(kcontrol);
unsigned int ofs = get_amp_offset(kcontrol);
- u32 caps;
- caps = query_amp_caps(codec, nid, dir);
- /* num steps */
- caps = (caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT;
- if (!caps) {
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = chs == 3 ? 2 : 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = get_amp_max_value(codec, nid, dir, ofs);
+ if (!uinfo->value.integer.max) {
printk(KERN_WARNING "hda_codec: "
"num_steps = 0 for NID=0x%x (ctl = %s)\n", nid,
kcontrol->id.name);
return -EINVAL;
}
- if (ofs < caps)
- caps -= ofs;
- uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
- uinfo->count = chs == 3 ? 2 : 1;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = caps;
return 0;
}
EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_volume_info);
int ch, int dir, int idx, unsigned int ofs,
unsigned int val)
{
+ unsigned int maxval;
+
if (val > 0)
val += ofs;
+ maxval = get_amp_max_value(codec, nid, dir, ofs);
+ if (val > maxval)
+ val = maxval;
return snd_hda_codec_amp_update(codec, nid, ch, dir, idx,
HDA_AMP_VOLMASK, val);
}