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/*
* HDMI Channel map support helpers
*/
#include <sound/hda_chmap.h>
static int hdmi_pin_set_slot_channel(struct hdac_device *codec,
hda_nid_t pin_nid, int asp_slot, int channel)
{
return snd_hdac_codec_write(codec, pin_nid, 0,
AC_VERB_SET_HDMI_CHAN_SLOT,
(channel << 4) | asp_slot);
}
static int hdmi_pin_get_slot_channel(struct hdac_device *codec,
hda_nid_t pin_nid, int asp_slot)
{
return (snd_hdac_codec_read(codec, pin_nid, 0,
AC_VERB_GET_HDMI_CHAN_SLOT,
asp_slot) & 0xf0) >> 4;
}
static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid)
{
return 1 + snd_hdac_codec_read(codec, cvt_nid, 0,
AC_VERB_GET_CVT_CHAN_COUNT, 0);
}
static void hdmi_set_channel_count(struct hdac_device *codec,
hda_nid_t cvt_nid, int chs)
{
if (chs != hdmi_get_channel_count(codec, cvt_nid))
snd_hdac_codec_write(codec, cvt_nid, 0,
AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);
}
static const struct hdac_chmap_ops chmap_ops = {
.pin_get_slot_channel = hdmi_pin_get_slot_channel,
.pin_set_slot_channel = hdmi_pin_set_slot_channel,
.set_channel_count = hdmi_set_channel_count,
};
void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
struct hdac_chmap *chmap)
{
chmap->ops = chmap_ops;
chmap->hdac = hdac;
}
EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops);
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