From: James Cloos <cloos@jhcloos.com>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: Keith Packard <keithp@keithp.com>,
"Wang, Zhenyu Z" <zhenyu.z.wang@intel.com>,
"intel-gfx@lists.freedesktop..."
<intel-gfx@lists.freedesktop.org>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
Ben Skeggs <bskeggs@redhat.com>,
Jeremy Bush <contractfrombelow@gmail.com>,
Christopher White <c.white@pulseforce.com>,
"Fu, Michael" <michael.fu@intel.com>,
"Bossart, Pierre-louis" <pierre-louis.bossart@intel.com>
Subject: Re: [PATCH v5] drm/i915: pass ELD to HDMI/DP audio driver
Date: Sun, 04 Sep 2011 06:57:23 -0400 [thread overview]
Message-ID: <m3r53wa82c.fsf@jhcloos.com> (raw)
In-Reply-To: <20110903211510.GA11600@localhost> (Wu Fengguang's message of "Sun, 4 Sep 2011 05:15:10 +0800")
>>>>> "WF" == Wu Fengguang <fengguang.wu@intel.com> writes:
WF> ... If only the stereo playback capability is reported, the user
WF> won't be able to start 8-channel playback; if the 8-channel ELD is
WF> reported, then user space applications may send 8-channel samples
WF> down, however the user may actually be listening to the 2-channel
WF> monitor and not connecting speakers to the 8-channel monitor.
WF> Overall, it's more safe to report maximum profiles to the user
WF> space, so that the user can at least be able to do 8-channel
WF> playback if he want to.
Be aware that many TVs will either refuse the display anything or pop-up
an OSD warning whenever they receive hdmi audio which they cannot handle.
Sending 8-channel in your example may render the stereo-only monitor useless.
That said, one step at a time is reasonable. But eventually you will
require configurability and/or per-monitor audio control even when the
video is cloned.
-JimC
--
James Cloos <cloos@jhcloos.com> OpenPGP: 1024D/ED7DAEA6
next prev parent reply other threads:[~2011-09-04 10:58 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-02 8:14 [PATCH v4] drm/i915: pass ELD to HDMI/DP audio driver Wu Fengguang
2011-09-02 8:29 ` Wu Fengguang
2011-09-03 21:15 ` [PATCH v5] " Wu Fengguang
2011-09-04 10:57 ` James Cloos [this message]
2011-09-05 1:19 ` Wu Fengguang
2011-09-04 11:11 ` [Intel-gfx] " Paul Menzel
2011-09-05 1:06 ` Wu Fengguang
2011-09-04 12:08 ` Chris Wilson
2011-09-05 1:14 ` Wu Fengguang
2011-09-05 11:04 ` Chris Wilson
2011-09-05 12:31 ` Wu Fengguang
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