diff options
| -rw-r--r-- | Documentation/sound/hd-audio/dp-mst.rst (renamed from Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt) | 30 | ||||
| -rw-r--r-- | Documentation/sound/hd-audio/index.rst | 1 |
2 files changed, 21 insertions, 10 deletions
diff --git a/Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt b/Documentation/sound/hd-audio/dp-mst.rst index 82744ac3513d..58b72437e6c3 100644 --- a/Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt +++ b/Documentation/sound/hd-audio/dp-mst.rst @@ -1,3 +1,7 @@ +======================= +HD-Audio DP-MST Support +======================= + To support DP MST audio, HD Audio hdmi codec driver introduces virtual pin and dynamic pcm assignment. @@ -44,10 +48,12 @@ Build Jack ---------- - dyn_pcm_assign -Will not use hda_jack but use snd_jack in spec->pcm_rec[pcm_idx].jack directly. + + Will not use hda_jack but use snd_jack in spec->pcm_rec[pcm_idx].jack directly. - !dyn_pcm_assign -Use hda_jack and assign spec->pcm_rec[pcm_idx].jack = jack->jack statically. + + Use hda_jack and assign spec->pcm_rec[pcm_idx].jack = jack->jack statically. Unsolicited Event Enabling @@ -58,16 +64,20 @@ Enable unsolicited event if !acomp. Monitor Hotplug Event Handling ------------------------------ - acomp -pin_eld_notify() -> check_presence_and_report() -> hdmi_present_sense() -> -sync_eld_via_acomp(). -Use directly snd_jack_report() on spec->pcm_rec[pcm_idx].jack for -both dyn_pcm_assign and !dyn_pcm_assign + + pin_eld_notify() -> check_presence_and_report() -> hdmi_present_sense() -> + sync_eld_via_acomp(). + + Use directly snd_jack_report() on spec->pcm_rec[pcm_idx].jack for + both dyn_pcm_assign and !dyn_pcm_assign - !acomp -Hdmi_unsol_event() -> hdmi_intrinsic_event() -> check_presence_and_report() -> -hdmi_present_sense() -> hdmi_prepsent_sense_via_verbs() -Use directly snd_jack_report() on spec->pcm_rec[pcm_idx].jack for dyn_pcm_assign. -Use hda_jack mechanism to handle jack events. + + hdmi_unsol_event() -> hdmi_intrinsic_event() -> check_presence_and_report() -> + hdmi_present_sense() -> hdmi_prepsent_sense_via_verbs() + + Use directly snd_jack_report() on spec->pcm_rec[pcm_idx].jack for dyn_pcm_assign. + Use hda_jack mechanism to handle jack events. Others to be added later diff --git a/Documentation/sound/hd-audio/index.rst b/Documentation/sound/hd-audio/index.rst index c6efd55a219f..f8a72ffffe66 100644 --- a/Documentation/sound/hd-audio/index.rst +++ b/Documentation/sound/hd-audio/index.rst @@ -7,3 +7,4 @@ HD-Audio notes models controls + dp-mst |