From: "Alexander E. Patrakov" <patrakov@gmail.com>
To: David Henningsson <david.henningsson@canonical.com>,
"Deucher, Alexander" <Alexander.Deucher@amd.com>,
Takashi Iwai <tiwai@suse.de>
Cc: Anssi Hannula <anssi.hannula@iki.fi>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Subject: Re: Radeon unconnected HDMI eats samples at 280 kHz
Date: Sat, 20 Sep 2014 00:19:52 +0600 [thread overview]
Message-ID: <541C73C8.3040606@gmail.com> (raw)
In-Reply-To: <541C6C23.1040403@canonical.com>
19.09.2014 23:47, David Henningsson wrote:
> If audio_enabled quickly changes to off and then on when there is a mode
> change, it might make sense to *not* wake up the audio driver in this
> case, as I assume that the audio capabilities on the HDMI TV will not
> change just because the video mode changes.
Unfortunately, they will. Some low-resolution video modes just don't
have enough pixel clock to transfer the 7.1 audio signal at 192 kHz. See
the table on page 105 (shown as 121 in some readers) of
http://www.microprocessor.org/HDMISpecification13a.pdf , section "7.3.3
Video Dependency".
--
Alexander E. Patrakov
next prev parent reply other threads:[~2014-09-19 18:19 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-17 13:40 Radeon unconnected HDMI eats samples at 280 kHz David Henningsson
2014-09-17 21:26 ` Anssi Hannula
2014-09-18 4:13 ` David Henningsson
2014-09-18 7:33 ` Takashi Iwai
2014-09-18 7:54 ` David Henningsson
2014-09-18 22:29 ` Deucher, Alexander
2014-09-19 13:38 ` David Henningsson
2014-09-19 14:14 ` Deucher, Alexander
2014-09-19 17:47 ` David Henningsson
2014-09-19 18:19 ` Alexander E. Patrakov [this message]
2014-09-19 23:35 ` David Henningsson
2014-09-20 9:37 ` Anssi Hannula
2014-09-20 9:39 ` Alexander E. Patrakov
2014-09-19 23:32 ` Deucher, Alexander
2014-09-20 0:06 ` David Henningsson
2014-09-20 9:31 ` Alexander E. Patrakov
2014-09-22 12:46 ` Deucher, Alexander
2014-09-22 14:39 ` David Henningsson
2014-09-22 14:52 ` Deucher, Alexander
2014-09-23 9:47 ` David Henningsson
2014-09-23 14:07 ` Deucher, Alexander
2014-09-24 9:27 ` David Henningsson
2014-09-24 21:37 ` Deucher, Alexander
2014-09-30 12:24 ` David Henningsson
2014-09-30 12:45 ` Deucher, Alexander
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