From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 110671] Regression: DP outputs out of sync on dual-DP tiled 5k screen Date: Mon, 13 May 2019 11:04:19 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1235012260==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 3CA5C89BD4 for ; Mon, 13 May 2019 11:04:19 +0000 (UTC) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============1235012260== Content-Type: multipart/alternative; boundary="15577454591.801E2de9.28223" Content-Transfer-Encoding: 7bit --15577454591.801E2de9.28223 Date: Mon, 13 May 2019 11:04:19 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D110671 Bug ID: 110671 Summary: Regression: DP outputs out of sync on dual-DP tiled 5k screen Product: DRI Version: DRI git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: bugs@bzatek.net With kernel 5.1.1 I get corrupted image on my Dell UP2715K screen (again). = The symptomps are similar to the ones in bug 98461 (see also attachment 127570)= . In my theory this is caused by the two DisplayPort outputs not being in sync -= the screen needs both tiles to be in sync (i.e. scanlines to match) to make a composite final image. The Dell UP2715K monitor has two DP 1.2 inputs, two tiles expecting 2560x2880@60Hz modes (as exposed in EDID/DisplayInfo data). Connected to Ra= deon Pro WX2100 (Polaris 12). This used to be actually working reliably in kernel 4.20.0, yesterday I fir= ed up kernel 5.1.1 and only got garbage on my screen. Also tested drm-tip kern= el that includes drm-next-5.2 branch from the agd5f repo (https://patchwork.freedesktop.org/patch/304430/) - same issue. I haven't got time to bisect the change yet, I was hoping you could point m= e to a possible commit that broke this. By any chance, do you AMD guys have a 5k tiled screen inhouse for testing? --=20 You are receiving this mail because: You are the assignee for the bug.= --15577454591.801E2de9.28223 Date: Mon, 13 May 2019 11:04:19 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated
Bug ID 110671
Summary Regression: DP outputs out of sync on dual-DP tiled 5k screen
Product DRI
Version DRI git
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity normal
Priority medium
Component DRM/AMDgpu
Assignee dri-devel@lists.freedesktop.org
Reporter bugs@bzatek.net 

With kernel 5.1.1 I get corrupted image on my Dell UP2715K scr=
een (again). The
symptomps are similar to the ones in bug 98461 (see also attachment 127570 [details]). In
my theory this is caused by the two DisplayPort outputs not being in sync -=
 the
screen needs both tiles to be in sync (i.e. scanlines to match) to make a
composite final image.

The Dell UP2715K monitor has two DP 1.2 inputs, two tiles expecting
2560x2880@60Hz modes (as exposed in EDID/DisplayInfo data). Connected t=
o Radeon
Pro WX2100 (Polaris 12).

This used to be actually working reliably in kernel 4.20.0, yesterday I fir=
ed
up kernel 5.1.1 and only got garbage on my screen. Also tested drm-tip kern=
el
that includes drm-next-5.2 branch from the agd5f repo
(https://patchw=
ork.freedesktop.org/patch/304430/) - same issue.

I haven't got time to bisect the change yet, I was hoping you could point m=
e to
a possible commit that broke this. By any chance, do you AMD guys have a 5k
tiled screen inhouse for testing?

You are receiving this mail because:
  • You are the assignee for the bug.
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