[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

            Bug ID: 101026
           Summary: RX 550 HDMI 4k 60fps not working, DisplayPort is.
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: liammurphy@fastmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Hello everyone,

Please let me know what logs/command outputs I can give, not sure what would
help you all out.

I recently bought an AMD RX 550, first GPU with the Polaris architecture (so I
assume growing pains here), and am experiencing a bug where HDMI at 4k 60 fps
is not working, but DisplayPort does. 

HDMI 4k60fps is working for me under Windows, so to me it's safe to say this is
a Mesa problem. 

This was happening on Mesa 17.0.5 and 17.2 git on OpenSUSE Tumbleweed, in
addition to Mesa 17 on Ubuntu 17.04.

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

Liam Murphy <liammurphy@fastmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |high

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #1 from Harry Wentland <harry.wentland@amd.com> ---
Hi Liam,

I haven't tried it myself but I don't think this will work with the upstream
amdgpu driver. You can try Alex's amd-staging-4.9 or amd-staging-4.11 trees and
enable CONFIG_DRM_AMD_DC to get support for our new display driver which is not
upstream yet. That should give you support for 4k60 over HDMI.

I don't think Mesa has anything to do with this.

Cheers,
Harry

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Drivers/Gallium/radeonsi    |DRM/AMDgpu
         QA Contact|dri-devel@lists.freedesktop |
                   |.org                        |
            Product|Mesa                        |DRI
            Version|git                         |unspecified

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #2 from dwagner <jb5sgc1n.nya@20mm.eu> ---
I just wanted to mention here that I currently use an RX 460 GPU to drive an
HDMI display at 3840x2160 60Hz, this became possible some time ago when DC code
was merged into the open source amdgpu driver. (BTW: HDMI audio also works for
me.)

I use a kernel compiled from
https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next as of
"commit  94097b0f7f1bfa54b3b1f8b0d74bbd271a0564e4".

So I think this bug-report could be closed with "works with bleeding edge
amdgpu version, now".

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #3 from dwagner <jb5sgc1n.nya@20mm.eu> ---
One more cosmetic note: Despite HDMI 2 modes with up to 600MHz working fine for
me, now, log messages emitted still talk about "max TMDS clock 300MHz", but
other messages and the display clearly indicate that in fact up to 600MHz are
in use.

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #4 from Harry Wentland <harry.wentland@amd.com> ---
Do you mind posting the logs? We might just need to cleanup the messages (i.e.
not print them).

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #5 from dwagner <jb5sgc1n.nya@20mm.eu> ---
Sure can do: This I find in Xorg.0.log:

[    36.956] (--) AMDGPU(0): HDMI max TMDS frequency 300000KHz
[    36.956] (II) AMDGPU(0): Printing probed modes for output HDMI-A-0
[    36.956] (II) AMDGPU(0): Modeline "3840x2160"x60.0  594.00  3840 4016 4104
4400  2160 2168 2178 2250 +hsync +vsync (135.0 kHz eP)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x60.0  594.00  4096 4184 4272
4400  2160 2168 2178 2250 +hsync +vsync (135.0 kHz e)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x50.0  594.00  4096 5064 5152
5280  2160 2168 2178 2250 +hsync +vsync (112.5 kHz e)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x59.9  593.41  4096 4184 4272
4400  2160 2168 2178 2250 +hsync +vsync (134.9 kHz e)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x30.0  297.00  4096 4184 4272
4400  2160 2168 2178 2250 +hsync +vsync (67.5 kHz e)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x25.0  297.00  4096 5064 5152
5280  2160 2168 2178 2250 +hsync +vsync (56.2 kHz e)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x24.0  297.00  4096 5116 5204
5500  2160 2168 2178 2250 +hsync +vsync (54.0 kHz e)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x30.0  296.70  4096 4184 4272
4400  2160 2168 2178 2250 +hsync +vsync (67.4 kHz e)
[    36.956] (II) AMDGPU(0): Modeline "4096x2160"x24.0  296.70  4096 5116 5204
5500  2160 2168 2178 2250 +hsync +vsync (53.9 kHz e)
[    36.956] (II) AMDGPU(0): Output HDMI-A-0 using initial mode 3840x2160 +0+0
... and also later...
[   133.973] (--) AMDGPU(0): HDMI max TMDS frequency 300000KHz
...
[   152.286] (--) AMDGPU(0): HDMI max TMDS frequency 300000KHz
... 
etc., seemingly as often as the EDID is re-read/re-considered.

>From the first parameter of the Modelines one can already see that modes with
594.00 MHz clock are found, and indeed, the "3840x2160" mode at 60Hz is used,
as both xrandr and the connected display report:

HDMI-A-0 connected 3840x2160+0+0 (normal left inverted right x axis y axis)
1600mm x 900mm
   3840x2160     60.00*+  50.00    59.94    30.00    25.00    24.00    29.97   
23.98

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #6 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to dwagner from comment #5)
> ... and also later...
> [   133.973] (--) AMDGPU(0): HDMI max TMDS frequency 300000KHz
> ...
> [   152.286] (--) AMDGPU(0): HDMI max TMDS frequency 300000KHz
> ... 
> etc., seemingly as often as the EDID is re-read/re-considered.
> 

The message is from the xserver, not the driver.  It's warning you because the
clock for the mode exceeds the max TMDS clock as stated by the EDID.

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #7 from dwagner <jb5sgc1n.nya@20mm.eu> ---
(In reply to Alex Deucher from comment #6)
> (In reply to dwagner from comment #5)
> > [   133.973] (--) AMDGPU(0): HDMI max TMDS frequency 300000KHz
> 
> The message is from the xserver, not the driver.  It's warning you because
> the clock for the mode exceeds the max TMDS clock as stated by the EDID.

Hmmm - when I "cat /usr/lib/firmware/edid/LG_EG9609_edid.bin | parse-edid", the
output contains:

  # Maximum pixel clock is 600MHz

Does the xserver have its own, flawed EDID parser?

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

--- Comment #8 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to dwagner from comment #7)
> 
> Does the xserver have its own, flawed EDID parser?

Yes, the xserver has it's own edid parser.

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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--- Comment #9 from dwagner <jb5sgc1n.nya@20mm.eu> ---
Ok, then nothing left to fix for this report, it seems.
@Liam Murphy: Good to close this report then?

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[Bug 101026] RX 550 HDMI 4k 60fps not working, DisplayPort is.

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https://bugs.freedesktop.org/show_bug.cgi?id=101026

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

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

--- Comment #10 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/168.

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