From: libin.yang@linux.intel.com
To: alsa-devel@alsa-project.org, tiwai@suse.de
Cc: libin.yang@intel.com, mengdong.lin@intel.com,
Libin Yang <libin.yang@linux.intel.com>
Subject: [RFC PATCH v3 3/3] ALSA: Documentation about HDA DP MST pin init and connection
Date: Thu, 13 Oct 2016 15:49:37 +0800 [thread overview]
Message-ID: <1476344977-147193-4-git-send-email-libin.yang@linux.intel.com> (raw)
In-Reply-To: <1476344977-147193-1-git-send-email-libin.yang@linux.intel.com>
From: Libin Yang <libin.yang@linux.intel.com>
Add the documentation about HD-audio DP MST:
1. pin initialization
2. device entry connection list
Signed-off-by: Libin Yang <libin.yang@linux.intel.com>
---
Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt b/Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt
index 82744ac..0c5ea7d 100644
--- a/Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt
+++ b/Documentation/sound/alsa/HD-Audio-DP-MST-audio.txt
@@ -15,6 +15,23 @@ PCM
===
To be added
+Pin Initialization
+==================
+Each pin may have several device entries (virtual pins). On Intel platform,
+the device entries number is dynamically changed. If DP MST hub is connected,
+it is in DP MST mode, and the device entries number is 3. Otherwise, the
+device entries number is 1.
+
+To simplify the implementation, all the device entries will be initialized
+when bootup no matter whether it is in DP MST mode or not.
+
+Connection list
+===============
+DP MST reuses connection list code. The code can be reused because
+device entries on the same pin have the same connection list.
+
+This means DP MST gets the device entry connection list without the
+device entry setting.
Jack
====
--
1.9.1
next prev parent reply other threads:[~2016-10-13 7:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 7:49 [RFC PATCH v3 0/3] support DP MST audio libin.yang
2016-10-13 7:49 ` [RFC PATCH v3 1/3] ALSA: hda - add DP mst verb support libin.yang
2016-10-20 15:27 ` Takashi Iwai
2016-10-21 6:52 ` Yang, Libin
2016-10-13 7:49 ` [RFC PATCH v3 2/3] ALSA: hda - add DP mst audio support libin.yang
2016-10-20 15:34 ` Takashi Iwai
2016-10-21 8:24 ` Yang, Libin
2016-10-21 8:43 ` Takashi Iwai
2016-10-21 8:56 ` Yang, Libin
2016-10-21 9:05 ` Takashi Iwai
2016-10-21 12:25 ` Yang, Libin
2016-10-21 12:33 ` Takashi Iwai
2016-10-21 13:25 ` Yang, Libin
2016-10-24 7:09 ` Yang, Libin
2016-10-24 8:41 ` Takashi Iwai
2016-10-24 8:52 ` Yang, Libin
2016-10-13 7:49 ` libin.yang [this message]
2016-10-20 7:23 ` [RFC PATCH v3 0/3] support DP MST audio Yang, Libin
2016-10-20 8:46 ` Takashi Iwai
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