linux-kernel - Re: Lenovo Dock + Thinkpad X260 -> no HDMI audio output

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Message-ID: <20161116120753.4wuw5feaoklqajf5@earth>
Date:   Wed, 16 Nov 2016 13:07:54 +0100
From:   Sebastian Reichel <sre@...nel.org>
To:     Norbert Preining <preining@...ic.at>
Cc:     linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: Lenovo Dock + Thinkpad X260 -> no HDMI audio output

Hi Norbert,

On Wed, Nov 16, 2016 at 11:38:21AM +0900, Norbert Preining wrote:
> I am trying to get HDMI audio output via a Lenovo Dock Ultra in
> combination with a Lenovo Thinkpad X260.
>
> [...]

Lenovo Dock Ultra contains a DP-MST Hub to provide all those
HDMI/DVI/DP ports. Audio over DP-MST is currently not supported
by the i915 driver, but there are patches (developed since ~2014):

https://lists.freedesktop.org/archives/intel-gfx/2016-November/111353.html

-- Sebastian

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