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| author | Subhransu S. Prusty <subhransu.s.prusty@intel.com> | 2016-03-04 17:29:49 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-03-07 17:41:31 +0300 |
| commit | 739ffee97ed550a2899a925ed3f260fa1e8fa955 (patch) | |
| tree | d6c16c5c52a798cb5a049e20c84bb2d242a2d2bd /sound/hda/hdmi_chmap.c | |
| parent | f302240da5d5cfc7366dc6994c523aa2aa17c122 (diff) | |
| download | linux-739ffee97ed550a2899a925ed3f260fa1e8fa955.tar.xz | |
ALSA: hda - Add hdmi chmap verb programming ops to chmap object
Add slot and channel count programming to hdmi_chmap object and
move the chmap_ops to core. Use register_chmap_ops API to
register for default ops. Override specific chmap ops in the
driver.
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda/hdmi_chmap.c')
| -rw-r--r-- | sound/hda/hdmi_chmap.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sound/hda/hdmi_chmap.c b/sound/hda/hdmi_chmap.c new file mode 100644 index 000000000000..6b9879013c86 --- /dev/null +++ b/sound/hda/hdmi_chmap.c @@ -0,0 +1,49 @@ +/* + * 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); |