Bug 102926

Summary:	Tonga agd5f drm-next-4.15-wip powerplay display artifacts.
Product:	DRI	Reporter:	Andy Furniss <adf.lists>
Component:	DRM/AMDgpu	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	DRI git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Andy Furniss 2017-09-21 10:38:27 UTC

R9285 on agd5f drm-next-4.15-wip  head I get some display glitches, nothing really bad, just the odd lines and a bit of bounce sometimes it seems to be memclk related.

Couldn't really bisect as I lock on older versions.

I started close to head where I don't lock but below isn't really valid as it turned out that on what I thought were goods were probably only good because memclk is stuck usally but not always high.

On head forcing memclk high or low makes the artifacts disappear.

This is just the commit that re-enables auto for memclk.

commit 76da74965138f4ab32113bf35b67321f4d7c3101
Author: Rex Zhu <Rex.Zhu@amd.com>
Date:   Thu Sep 14 21:05:18 2017 +0800

    drm/amd/powerplay: Add support for CI asics to hwmgr
    
    Add support for CI asics (Bonaire, Hawaii) to
    the powerplay hwmgr

Comment 1 Christian König 2017-09-21 11:23:12 UTC

At least I'm not the only one seeing this. Very visible during the Xonotic start screen.

Comment 2 Tom St Denis 2017-10-04 13:10:14 UTC

I've independently bisected it to the same commit on drm-next

commit 0b6b4cbf77c995a34a4ec3d705a636434dadc51a
Author: Rex Zhu <Rex.Zhu@amd.com>
Date:   Thu Sep 14 21:05:18 2017 +0800

    drm/amd/powerplay: Add support for CI asics to hwmgr
    
    Add support for CI asics (Bonaire, Hawaii) to
    the powerplay hwmgr
    
    Change-Id: Ia0a31f631dfd717807c16c6c166c994566f644c9
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>

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