From: libin.yang@intel.com
To: intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com,
ville.syrjala@linux.intel.com, daniel.vetter@intel.com,
dhinakaran.pandiyan@intel.com, tiwai@suse.de
Subject: [PATCH v5 3/3] ALSA: Documentation about HDA DP MST pin init and connection
Date: Thu, 12 Jan 2017 16:04:54 +0800 [thread overview]
Message-ID: <1484208294-8637-4-git-send-email-libin.yang@intel.com> (raw)
In-Reply-To: <1484208294-8637-1-git-send-email-libin.yang@intel.com>
From: Libin Yang <libin.yang@intel.com>
Add the documentation about HD-audio DP MST:
1. pin initialization
2. device entry connection list
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Libin Yang <libin.yang@intel.com>
---
Documentation/sound/hd-audio/dp-mst.rst | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/Documentation/sound/hd-audio/dp-mst.rst b/Documentation/sound/hd-audio/dp-mst.rst
index 58b7243..1617459 100644
--- a/Documentation/sound/hd-audio/dp-mst.rst
+++ b/Documentation/sound/hd-audio/dp-mst.rst
@@ -19,6 +19,23 @@ 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
====
--
2.7.4
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next prev parent reply other threads:[~2017-01-12 8:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-12 8:04 [PATCH v5 0/3] support DP MST audio libin.yang
2017-01-12 8:04 ` [PATCH v5 1/3] ALSA: hda - add DP mst verb support libin.yang
2017-01-12 8:04 ` [PATCH v5 2/3] ALSA: hda - add DP MST audio support libin.yang
2017-01-12 8:04 ` libin.yang [this message]
2017-01-12 8:19 ` [PATCH v5 0/3] support DP MST audio Jani Nikula
2017-01-12 8:29 ` Yang, Libin
2017-01-12 8:53 ` Jani Nikula
2017-01-12 9:03 ` Takashi Iwai
2017-01-12 9:06 ` Daniel Vetter
2017-01-12 9:09 ` Daniel Vetter
2017-01-13 2:48 ` Yang, Libin
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