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Commit 76ab4e15 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: doc: ReSTize HD-Audio-DP-MST-audio.txt 



A simple conversion from a plain text file.
Put to hd-audio subdirectory.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent fe0abd18

Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt→Documentation/sound/hd-audio/dp-mst.rst

+20 −10
Original line number Diff line number Diff line 
=======================

HD-Audio DP-MST Support

=======================



To support DP MST audio, HD Audio hdmi codec driver introduces virtual pin

and dynamic pcm assignment.
@@ -44,9 +48,11 @@ Build Jack 
----------



- dyn_pcm_assign



  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.
@@ -58,14 +64,18 @@ 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



- !acomp

Hdmi_unsol_event() -> hdmi_intrinsic_event() -> check_presence_and_report() ->



  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.

Documentation/sound/hd-audio/index.rst

+1 −0
Original line number Diff line number Diff line
@@ -7,3 +7,4 @@ HD-Audio 
   notes

   models

   controls

   dp-mst