[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

            Bug ID: 105651
           Summary: Vega64 doesn't output properly onto dell up2715k at
                    5120x2880
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: spgle212@gmail.com

I have tested 4.16 and drm-next-4.17 both under wayland and xorg. All only show
the monitor as 2 displays with 2560x2880 side by side.
(I previously had an nvidia gpu using their binary blob on this display without
issue)

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

spgle212@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=99801

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

spgle212@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=105198

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

spgle212@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=97244

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

--- Comment #1 from Harry Wentland <harry.wentland@amd.com> ---
amdgpu doesn't currently have support for tiled displays. It's expected with
tiled displays that you see them as you describe.

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

Alex Deucher <alexdeucher@gmail.com> changed:

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

--- Comment #2 from Alex Deucher <alexdeucher@gmail.com> ---
This is handled at the Desktop level.  There are quite a few large format
displays that show up as multiple DP MST displays, even a number of early 4k
displays.  X exposes the tile info via randr 1.5 and the desktop environment
should handle it as a single monitor.  Mutter handles this in GNOME for
example.

https://cgit.freedesktop.org/xorg/xserver/commit/?id=7e1f86d42b54fb7f6492875e47a718eaeca3069b
https://lists.x.org/archives/xorg-announce/2015-May/002605.html
https://mail.gnome.org/archives/desktop-devel-list/2015-November/msg00018.html

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

spgle212@gmail.com changed:

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

--- Comment #3 from spgle212@gmail.com ---
Yes it is handled at Desktop level.
(https://gitlab.gnome.org/GNOME/mutter/issues/110)

But the tile property has to be exposed from kernel driver as far as i
understand. Which was not the case in my setup with amdgpu. With the new patch
from here
https://gitlab.freedesktop.org/xorg/driver/xf86-video-amdgpu/merge_requests/32
it should work but i can not see any tiled properties.

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

Denys <d.budelkov@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=110671

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

--- Comment #4 from spgle212@gmail.com ---
For this to work the TILE property (blob) of the connector has to be exposed.
modetest does not return it.

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

--- Comment #5 from spgle212@gmail.com ---
xrandr --props also does not return the tile property.

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

--- Comment #6 from Redsandro <freedesktop@redsandro.e4ward.com> ---
I'm having the same issue with a 4K Dell UP2414Q with 3840x2160 as
1920x2160+0+0, 1920x2160 +1920+0.

Is it possible to do a workaround in xorg.conf, similar to nVidia's TwinView
and nvidiaXineramaInfoOrder as described in this question?

https://unix.stackexchange.com/questions/536175/how-do-i-tile-two-displays-onto-one-monitor-with-amd-graphics

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

--- Comment #7 from Alex Deucher <alexdeucher@gmail.com> ---
You need to be using the amdgpu driver if you are running xorg.  I'm not sure
if the modesetting driver supports the tile property yet.

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

--- Comment #8 from Tomas Bzatek <bugs@bzatek.net> ---
FYI starting with kernel 5.2 the tile property is propagated properly on Dell
UP2715K. The Mate desktop picks this up just fine.

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

--- Comment #9 from Redsandro <freedesktop@redsandro.e4ward.com> ---
@AlexDeucher I am using xserver-xorg-video-amdgpu. I can use 18.0.1 (No TILE
support, need workaround) or 19.0.1 (Cinnamon crashes, need workaround for time
being). I'm looking for a xorg config or xrandr command that works like
nVidia's TwinView that I can keep in place while I am checking TILE support
with this DM and kernel from time to time. (I am new to AMD/Radeon.)

@TomasBzatek I still need a workaround because Cinnamon crashes on 5.2 w/
19.0.1 TILE support. See https://github.com/linuxmint/cinnamon/issues/8807

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[Bug 105651] Vega64 doesn't output properly onto dell up2715k at 5120x2880

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https://bugs.freedesktop.org/show_bug.cgi?id=105651

spgle212@gmail.com changed:

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

--- Comment #10 from spgle212@gmail.com ---
Fixed in 5.2. Now only syncing issues are remaining but thats another bug
(110671)

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