[Bug 81924] New: No Audio over DisplayPort

[Bug 81924] New: No Audio over DisplayPort

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=81924

          Priority: medium
            Bug ID: 81924
          Assignee: dri-devel@lists.freedesktop.org
           Summary: No Audio over DisplayPort
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: stefan.bruens@rwth-aachen.de
          Hardware: Other
            Status: NEW
           Version: DRI CVS
         Component: DRM/Radeon
           Product: DRI

Currently audio is not supported when DP is used for connecting the monitor.

This works if the monitor is connected using HDMI, or when fglrx is used.

I tried patching the driver with hardcoded values taken from the fglrx drivers
using radeontool, unfortunately, this was not sufficient.

1. added call in atombios_encoders.c:radeon_atom_encoder_mode_set(...) to
initialize audio when encoder mode is DP.
2. patched evergreen_hdmi.c:evergreen_hdmi_enable(...) and
evergreen_hdmi_setmode(...) to set same register values as fglrx.
3. patched dce6_afmt.c to set values matching fglrx.

Something is missing here ...

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[Bug 81924] No Audio over DisplayPort

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https://bugs.freedesktop.org/show_bug.cgi?id=81924

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement

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[Bug 81924] No Audio over DisplayPort

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https://bugs.freedesktop.org/show_bug.cgi?id=81924

--- Comment #1 from Jürgen Scholz <juergen.scholz.84@gmail.com> ---
I am trying to use a displayport connection between a Tahiti XT R9 280X and my
monitor to output audio.

The initial report seems still valid: Using HDMI for audio works with the same
monitor and it does not with displayport.

Running aplay -D plughw:0,$i does not lead to audible sound. No error messages
though.

Trying to force audio on with xrandr --output DisplayPort-0 --set audio on does
not work either.

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[Bug 81924] No Audio over DisplayPort

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=81924

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #2 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/512.

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