projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 739ffee9 SP |
1 | /* |
| 2 | * HDMI Channel map support helpers | |
| 3 | */ | |
| 4 | ||
| 5 | #include <sound/hda_chmap.h> | |
| 6 | ||
| 7 | static int hdmi_pin_set_slot_channel(struct hdac_device *codec, | |
| 8 | hda_nid_t pin_nid, int asp_slot, int channel) | |
| 9 | { | |
| 10 | return snd_hdac_codec_write(codec, pin_nid, 0, | |
| 11 | AC_VERB_SET_HDMI_CHAN_SLOT, | |
| 12 | (channel << 4) | asp_slot); | |
| 13 | } | |
| 14 | ||
| 15 | static int hdmi_pin_get_slot_channel(struct hdac_device *codec, | |
| 16 | hda_nid_t pin_nid, int asp_slot) | |
| 17 | { | |
| 18 | return (snd_hdac_codec_read(codec, pin_nid, 0, | |
| 19 | AC_VERB_GET_HDMI_CHAN_SLOT, | |
| 20 | asp_slot) & 0xf0) >> 4; | |
| 21 | } | |
| 22 | ||
| 23 | static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid) | |
| 24 | { | |
| 25 | return 1 + snd_hdac_codec_read(codec, cvt_nid, 0, | |
| 26 | AC_VERB_GET_CVT_CHAN_COUNT, 0); | |
| 27 | } | |
| 28 | ||
| 29 | static void hdmi_set_channel_count(struct hdac_device *codec, | |
| 30 | hda_nid_t cvt_nid, int chs) | |
| 31 | { | |
| 32 | if (chs != hdmi_get_channel_count(codec, cvt_nid)) | |
| 33 | snd_hdac_codec_write(codec, cvt_nid, 0, | |
| 34 | AC_VERB_SET_CVT_CHAN_COUNT, chs - 1); | |
| 35 | } | |
| 36 | ||
| 37 | static const struct hdac_chmap_ops chmap_ops = { | |
| 38 | .pin_get_slot_channel = hdmi_pin_get_slot_channel, | |
| 39 | .pin_set_slot_channel = hdmi_pin_set_slot_channel, | |
| 40 | .set_channel_count = hdmi_set_channel_count, | |
| 41 | }; | |
| 42 | ||
| 43 | void snd_hdac_register_chmap_ops(struct hdac_device *hdac, | |
| 44 | struct hdac_chmap *chmap) | |
| 45 | { | |
| 46 | chmap->ops = chmap_ops; | |
| 47 | chmap->hdac = hdac; | |
| 48 | } | |
| 49 | EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops); |