[Bug 80691] New: HDMI audio stops working when drm_kms_helper edid overwrite in place

[Bug 80691] New: HDMI audio stops working when drm_kms_helper edid overwrite in place

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=80691

          Priority: medium
            Bug ID: 80691
          Assignee: dri-devel@lists.freedesktop.org
           Summary: HDMI audio stops working when drm_kms_helper edid
                    overwrite in place
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: warlock0@hotmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 101987
  --> https://bugs.freedesktop.org/attachment.cgi?id=101987&action=edit
dmesg

When powering on a PC with radeon gpu (E350 in this case), without an output
device powered on (on the hdmi out), X won't start.
Therefore using drm_kms_helper to overwrite the edid information and forcing
the display to on is needed.

In this combination the hdmi audio output is not working.
It also is not working if the system is started with the overwrite in place and
TV / AVR turned on.
It seems as if the audio codec is not enabled when EDID is loaded with
drm_kms_helper

Expectation: Audio will continue to work when overwriting EDID with
drm_kms_helper.

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[Bug 80691] HDMI audio stops working when drm_kms_helper edid overwrite in place

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https://bugs.freedesktop.org/show_bug.cgi?id=80691

--- Comment #1 from warlock0@hotmail.com ---
Created attachment 101988
  --> https://bugs.freedesktop.org/attachment.cgi?id=101988&action=edit
edid parsed with edid-decode

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[Bug 80691] HDMI audio stops working when drm_kms_helper edid overwrite in place

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https://bugs.freedesktop.org/show_bug.cgi?id=80691

--- Comment #2 from warlock0@hotmail.com ---
Created attachment 101989
  --> https://bugs.freedesktop.org/attachment.cgi?id=101989&action=edit
extracted edid.bin

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[Bug 80691] HDMI audio stops working when drm_kms_helper edid overwrite in place

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https://bugs.freedesktop.org/show_bug.cgi?id=80691

--- Comment #3 from lukas.redlinger@gmx.at ---
I am also affected by this bug, running a Zotac ZBox AD02 with AMD Fusion. Can
I provide more information that is needed to get this fixed?

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[Bug 80691] HDMI audio stops working when drm_kms_helper edid overwrite in place

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https://bugs.freedesktop.org/show_bug.cgi?id=80691

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> ---
The driver caches a copy of the edid in the driver connector structure
(radeon_connector->edid) when it it reads the edid from the monitor via the
get_modes() or detect() connector callbacks.  When you provide a user supplied
edid, the driver's copy never gets updated since no additional driver callbacks
are called.  It should be handled properly on my 3.17-wip branch:
http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.17-wip

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[Bug 80691] HDMI audio stops working when drm_kms_helper edid overwrite in place

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https://bugs.freedesktop.org/show_bug.cgi?id=80691

--- Comment #5 from Jani Nikula <jani.nikula@intel.com> ---
(In reply to Alex Deucher from comment #4)
> The driver caches a copy of the edid in the driver connector structure
> (radeon_connector->edid) when it it reads the edid from the monitor via the
> get_modes() or detect() connector callbacks.  When you provide a user
> supplied edid, the driver's copy never gets updated since no additional
> driver callbacks are called.  It should be handled properly on my 3.17-wip
> branch:
> http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.17-wip

Alex, did not look at what you did there, but there's no confirmation from the
reporters either. I submitted [1] to fix bug 82349, maybe that's relevant for
you too?

[1] http://patchwork.freedesktop.org/patch/45675/

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[Bug 80691] HDMI audio stops working when drm_kms_helper edid overwrite in place

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https://bugs.freedesktop.org/show_bug.cgi?id=80691

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

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

--- Comment #6 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/509.

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