[Bug 81924] New: No Audio over DisplayPort

[bugzilla-daemon at freedesktop.org]

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

          Priority: medium
            Bug ID: 81924
          Assignee: dri-devel at lists.freedesktop.org
           Summary: No Audio over DisplayPort
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: stefan.bruens at 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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