[Bug 102401] New: 4.2 RC5

[Bug 102401] New: 4.2 RC5

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

            Bug ID: 102401
           Summary: 4.2 RC5
           Product: Drivers
           Version: 2.5
    Kernel Version: Radeon Displayport Audio Warping
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: contrib@kliznoe.com
        Regression: No

I'm having issues with Linux 4.2 RC5 with the Displayport audio being deeper
then normal. Doesn't seem to happen with 4.1.3 with a backported patch from
https://bugzilla.kernel.org/attachment.cgi?id=183611

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia <contrib@kliznoe.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|4.2 RC5                     |Radeon Displayport Audio
                   |                            |Warping

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia <contrib@kliznoe.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|Radeon Displayport Audio    |4.2 RC5
                   |Warping                     |

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #1 from Maxqia <contrib@kliznoe.com> ---
Created attachment 184611
  --> https://bugzilla.kernel.org/attachment.cgi?id=184611&action=edit
Patch

Reverting Commit 7726e72b3d6879ee5fc743a230eb6f5afa12844b Seems to fix my
issues.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #2 from Alex Deucher <alexdeucher@gmail.com> ---
Are you sure that's the right commit?  That commit shouldn't have any affect on
DP audio.  All it does is move the check for monitor audio support from
radeon_atom_encoder_mode_set() into radeon_audio_mode_set().  It doesn't change
the hw programming at all.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia <contrib@kliznoe.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #184611|0                           |1
        is obsolete|                            |

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #3 from Maxqia <contrib@kliznoe.com> ---
Yes, I just double checked. With the commit, the displayport audio is warped.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #4 from Maxqia <contrib@kliznoe.com> ---
Huh seems to be the EDID detection. Windows/xrandr --verbose seem to get the
EDID right but get-edid doesn't.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia <contrib@kliznoe.com> changed:

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

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia <contrib@kliznoe.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |---

--- Comment #5 from Maxqia <contrib@kliznoe.com> ---
Replacing drm_detect_monitor_audio(radeon_connector_edid(connector)) with true
seems to fix the problem.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #6 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Maxqia from comment #5)
> Replacing drm_detect_monitor_audio(radeon_connector_edid(connector)) with
> true seems to fix the problem.

This means the EDID from your monitor claims not to support audio.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #7 from Maxqia <contrib@kliznoe.com> ---
Created attachment 185301
  --> https://bugzilla.kernel.org/attachment.cgi?id=185301&action=edit
dmesg log

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #8 from Maxqia <contrib@kliznoe.com> ---
It works with fglrx, also in the dmesg log it says
"[drm:drm_detect_monitor_audio] Monitor has basic audio support"
Which is when it should output true

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #9 from Maxqia <contrib@kliznoe.com> ---
Created attachment 185391
  --> https://bugzilla.kernel.org/attachment.cgi?id=185391&action=edit
Possible Patch

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia <contrib@kliznoe.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #185391|0                           |1
        is obsolete|                            |

--- Comment #10 from Maxqia <contrib@kliznoe.com> ---
Created attachment 185441
  --> https://bugzilla.kernel.org/attachment.cgi?id=185441&action=edit
Updated Patch

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #11 from Maxqia <contrib@kliznoe.com> ---
Any Updates?

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #12 from Alex Deucher <alexdeucher@gmail.com> ---
I don't see what this patch changes.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

--- Comment #13 from Maxqia <public@maxqia.com> ---
Looking back with an extra year of programming knowledge, it seems like commit
7726e72b3d6879ee5fc743a230eb6f5afa12844b doesn't do anything except add a
drm_detect_monitor_audio to the hdmi audio pathway ..., before that commit only
Displayport was checked for audio. Anyways, issue still present.

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia <public@maxqia.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #185441|0                           |1
        is obsolete|                            |

--- Comment #14 from Maxqia <public@maxqia.com> ---
Created attachment 238501
  --> https://bugzilla.kernel.org/attachment.cgi?id=238501&action=edit
Explained Patch

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Maxqia (public@maxqia.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #238501|0                           |1
        is obsolete|                            |

--- Comment #15 from Maxqia (public@maxqia.com) ---
Comment on attachment 238501
  --> https://bugzilla.kernel.org/attachment.cgi?id=238501
Explained Patch

:/ I really don't know what I'm doing...
Commenting this if block fixes it...
https://github.com/torvalds/linux/blob/9439b3710df688d853eb6cb4851256f2c92b1797/drivers/gpu/drm/radeon/radeon_atombios.c#L1267
That probably means that the thing setting the display clock frequency is
broken in some way...

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[Bug 102401] Radeon Displayport Audio Warping

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=102401

Vitor Antunes (vitor.hda@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vitor.hda@gmail.com

--- Comment #16 from Vitor Antunes (vitor.hda@gmail.com) ---
I'm having the same problem with my Tahiti GPU.
This output seems to confirm that there's an EDID issue:
> tail -n+1 /proc/asound/card*/eld*
[...]
edid_version            [0x0] no CEA EDID Timing Extension block present
[...]

These patches touch DCE6 and such:
https://lists.freedesktop.org/archives/amd-gfx/2018-October/027462.html
Maybe it fixes this issue?

Don't have the availability to test at the moment.

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