[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

            Bug ID: 98333
           Summary: 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: dillondixon@gmail.com

So this is regarding AMDGPU DAL as it currently exists in
https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-4.7, which from my
understanding contains the most up-to-date public-facing iteration of the DAL
patch.

So I have an HDMI 2.0 4K 60 Hz monitor (Vizio D40u-D1) as my main display
connected to an XFX RX 480. I'm using a kernel compiled from the branch listed
above.

Now the issue I'm having is that I'm stuck at 30 Hz. The RX 480 is capable of
driving this monitor at 60 Hz @ 4K, which works under Windows. Trying to switch
to 60 Hz either results in no signal, or just 30 Hz again.

I had the same issue in the past with the proprietary Linux Nvidia drivers on a
960 GTX I used to own, and after several months, the devs there were able to
figure out what the issue is, describe it in a forum post, and get a fix in.
See here:
https://devtalk.nvidia.com/default/topic/939971/linux/4k-60hz-works-in-windows-not-in-linux/

So what I'm hoping is that a similar fix would work in DAL.

I can provide logs on request (not sure to log right now).

Thanks!

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Is the issue that a 60 hz mode is not available or that a 60 hz mode does not
work?  Please attach your xorg log, dmesg output and xrandr output.  You may
need this drm patch:
https://lists.freedesktop.org/archives/dri-devel/2016-May/107463.html

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #2 from Harry Wentland <harry.wentland@amd.com> ---
I don't have the same monitor but I don't have any problem lighting up with
HDMI 2.0 4k 60Hz with Alex's amd-staging-4.7 and the commit from a week ago:

commit 4fa58023f62a95e93f82a25cdceb87b19b69b27f
Author: Christian König <christian.koenig@amd.com>
Date:   Mon Oct 17 15:34:07 2016 +0200

    reservation: revert "wait only with non-zero timeout specified (v3)"

    This reverts commit fb8b7d2b9d80e1e71f379e57355936bd2b024be9.

    Otherwise signaling might never be activated on the fences. This can
    result in infinite waiting with hardware which has unreliable interrupts.

    Signed-off-by: Christian König <christian.koenig@amd.com>
    Reviewed-by: Chunming Zhou <david1.zhou@amd.com>

If you still see this issue please attach xorg log, dmesg and xrandr output, as
Alex suggested.

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #3 from Dillon Dixon <dillondixon@gmail.com> ---
Created attachment 127712
  --> https://bugs.freedesktop.org/attachment.cgi?id=127712&action=edit
xrandr, dmesg, and xorg logs

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #4 from Dillon Dixon <dillondixon@gmail.com> ---
Thanks for responding to my ticket! Sorry, I didn't have time to record down
all the relevant information until recently.

Anyway, the 60 Hz mode is missing completely. I attached the relevant logs to
the ticket.

I tried updating my clone of the kernel repo up to the commit at the end of
this post, but the issue persists. I will try the suggested patch and respond
as to whether or not it makes a difference for me.

Thanks again!

commit 019b84cce0585498430215503a50633d2d6a7fc8
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Wed Oct 26 16:41:39 2016 -0400

    drm/amdgpu: add support for new smc firmware on tonga

    Newer tonga parts require new smc firmware.

    Reviewed-by: Eric Huang <JinHuiEric.Huang@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #5 from Dillon Dixon <dillondixon@gmail.com> ---
Just tried the patch. That added a 60 Hz mode back in, but when I try to switch
to it, I get no signal.

I can post logs if relevant.

Here is my output now from xrandr:

Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
DisplayPort-2 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y
axis) 878mm x 485mm
   3840x2160     30.00*+  59.94    59.88    24.00    29.97    23.98    29.94   
23.95  
   4096x2160     59.94    59.88    24.00    29.97    23.98    29.94    23.95  
   1920x1200     30.00  
   1920x1080    120.04   120.00   119.88    60.00    59.94    24.00    23.98  
   1600x1200     30.00  
   1680x1050     30.00  
   1280x1024     30.00  
   1440x900      30.00  
   1280x800      30.00  
   1280x720      60.00    59.94  
   1024x768      30.00  
   800x600       30.00  
   720x480       60.00    59.94  
   640x480       60.00    59.94

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #6 from Dillon Dixon <dillondixon@gmail.com> ---
I was reminded today that this TV is a bit strange in that 4K @ 60 Hz only
works with 4:2:0 chroma, while the common expectation would perhaps be 4:4:4.
Perhaps that can help lead to a solution?

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #7 from John Bridgman <john.bridgman@amd.com> ---
The NVidia ticket suggests this might be an EDID issue, with the display saying
that it supports 4:2:2 at 4K/60 Hz when in fact it only supports 4:2:0.

Or could have been an NVidia driver bug that caused problems when modes for
both 4:2:2 and 4:2:0 were available, hard to say. Anyways, seems like if we can
get the driver to try 4:2:0 (possibly ignoring the monitor to do so) then it
should work at 60 Hz.

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #8 from wiak@nwgat.net ---
Created attachment 128745
  --> https://bugs.freedesktop.org/attachment.cgi?id=128745&action=edit
dmesg log

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #9 from wiak@nwgat.net ---
Hey i got the exact same issue with a Samsung HU7505 4k60 television using
amdgpu on xubuntu 16.04.1/16.10, amdgpu-pro-16.50-362463 drivers work in 4k60
until the display is turned off and then it gives "mode not supported"


both the bios and the edid from the display while on crimson 16.12
https://f001.backblazeb2.com/file/nwgat-cdn/misc/xfx-rx460-Baffin-bios.rom
https://f001.backblazeb2.com/file/nwgat-cdn/misc/samsung_uhd_colour_YCbCr444-4k60_edid.bin

amd-staging-4.7 kernel, made no difference (git pull today)
ubuntu 4.10 from kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc2/

might also be related to black screen on 4k60 issue i have on windows 
https://www.reddit.com/r/Amd/comments/5fyy7c/december_tech_support_megathread/dbwa536/?context=3

System Configuration:
Motherboard: FM2A88X-ITX+ AMD A88X
CPU: AMD A10-7800
Memory: 16GB DDR3
GPU: XFX RX 460 2GB (RX-460P2SFG5)
GPU-Z Report: https://www.techpowerup.com/gpuz/details/4qq9n
VBIOS: 015.050.000.000.000000
Driver: amdgpu
OS: xubuntu 16.04.1 LTS AMD64 or 16.10 AMD64
Display: Samsung UE55HU7505 55" UltraHD (in UHD Colour Mode)
Display Cable: Startech Pro Series Metal High Speed HDMI Cable 2M (HDPSMM2M)

from samsung manual
http://downloadcenter.samsung.com/content/UM/201411/20141127124859330/[ENG]NUDVBEUH-1.111-1015.pdf

CEA-861
3840x2160 50Hz 112.500 50.000 594.000 +/+
3840x2160 60Hz 135.000 60.000 594.000 +/+
4096x2160 50Hz 112.500 50.000 594.000 +/+
4096x2160 60Hz 135.000 60.000 594.000 +/+

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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--- Comment #10 from wiak@nwgat.net ---
Created attachment 128746
  --> https://bugs.freedesktop.org/attachment.cgi?id=128746&action=edit
xorg log

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #11 from wiak@nwgat.net ---
Created attachment 128747
  --> https://bugs.freedesktop.org/attachment.cgi?id=128747&action=edit
xrandr

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #12 from wiak@nwgat.net ---
Created attachment 128748
  --> https://bugs.freedesktop.org/attachment.cgi?id=128748&action=edit
amdgpu-pro-dmesg

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #13 from wiak@nwgat.net ---
Created attachment 128749
  --> https://bugs.freedesktop.org/attachment.cgi?id=128749&action=edit
amdgpu-pro-xorg.log

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[Bug 98333] 4K @ 60Hz over HDMI 2.0 not working with AMDGPU-DAL

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #14 from wiak@nwgat.net ---
Created attachment 128750
  --> https://bugs.freedesktop.org/attachment.cgi?id=128750&action=edit
amdgpu-pro-xrandr.log

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https://bugs.freedesktop.org/show_bug.cgi?id=98333

--- Comment #15 from smoki <smoki00790@gmail.com> ---
(In reply to wiak from comment #9)
> Hey i got the exact same issue with a Samsung HU7505 4k60 television using
> amdgpu on xubuntu 16.04.1/16.10, amdgpu-pro-16.50-362463 drivers work in
> 4k60 until the display is turned off and then it gives "mode not supported"
> 

 On pro it might be just DPMS on/off issue or some monitors (this is actually
TV where DPMS is usually off by default) or specific issues/customizations
like:

 "Samsung offers a new user-accessible control called [HDMI UHD Color] on its
2014 range of UHDTVs. Instead of expanding the TV’s gamut to fulfil Rec.2020
colour space (we wished), it serves to provide support for up to 4:4:4 chroma
resolution with 4K@60p/50p sources, indicating that the 55HU7500′s onboard HDMI
2.0 chip is a full-bandwidth, Level A version. [HDMI UHD Color] has to be
enabled manually for each HDMI port where 4K res with 4:2:2 or 4:4:4
reproduction is required, because the chroma information is not auto-detected
by the chip Samsung is using."

 http://www.hdtvtest.co.uk/news/ue55hu7500-201405083761.htm

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--- Comment #16 from Daniel J Blueman <daniel@quora.org> ---
I am experiencing the same 4K @ 30Hz limit with my RX460 and LG 27UD88-W
monitor via a Highspeed HDMI cable. I have enabled HDMI DeepColour on the
monitor, needed for the monitor to advertise 4K @ 60Hz.

Kernel is stock 4.9.11 on ElementaryOS (Ubuntu 16.04) with the HWE stack.

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--- Comment #17 from Daniel J Blueman <daniel@quora.org> ---
Created attachment 129853
  --> https://bugs.freedesktop.org/attachment.cgi?id=129853&action=edit
xrandr + Xorg.0.log + dmesg

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--- Comment #18 from Alex Deucher <alexdeucher@gmail.com> ---
If the modes are only in the CEA extension block then this is a core drm issue.
 The core EDID parser does not handles all of the CEA 4K modes yet.  Patches
were proposed by several people, but I don't think any of them have gone
upstream yet due to various objections and bikeshedding.  See:
https://lists.freedesktop.org/archives/dri-devel/2016-May/107463.html
https://lists.freedesktop.org/archives/dri-devel/2016-October/121434.html
https://lists.freedesktop.org/archives/dri-devel/2016-November/122631.html

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

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

--- Comment #19 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/109.

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