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