Bug 105324

Summary:	R9 285 weston hangs since drm/amd/pp: Fix bug that dpm level was not really locked
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 2018-03-02 09:57:20 UTC

R9 285 Tonga,  testing with amdgpu.dc=0 on agd5f 4.17-wip

Since

commit a02497b73218f10f237d98fb10d34d0baed607a0
Author: Rex Zhu <Rex.Zhu@amd.com>
Date:   Fri Feb 9 16:47:53 2018 +0800

    drm/amd/pp: Fix bug that dpm level was not really locked
    
    Lock the dpm levels when we use SW method to modify
    the dpm tables directly to avoid a possible race
    with the smu.

weston may hang display on start/quit/vt switch

SysRq works and logged will be errors like -

Mar  2 00:19:03 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:03 ph4 kernel:  failed to send message 18b ret is 0 
Mar  2 00:19:03 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:03 ph4 kernel:  failed to send pre message 18a ret is 0 
Mar  2 00:19:04 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:04 ph4 kernel:  failed to send message 18a ret is 0 
Mar  2 00:19:04 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:04 ph4 kernel:  failed to send pre message 18c ret is 0 
Mar  2 00:19:04 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:04 ph4 kernel:  failed to send message 18c ret is 0 
Mar  2 00:19:05 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:05 ph4 kernel:  failed to send pre message 145 ret is 0 
Mar  2 00:19:05 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:05 ph4 kernel:  failed to send message 145 ret is 0 
Mar  2 00:19:06 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:06 ph4 kernel:  failed to send pre message 146 ret is 0 
Mar  2 00:19:06 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:06 ph4 kernel:  failed to send message 146 ret is 0 
Mar  2 00:19:07 ph4 kernel: amdgpu: [powerplay] 
Mar  2 00:19:07 ph4 kernel:  failed to send pre message 148 ret is 0

Comment 1 Andy Furniss 2018-03-07 10:46:19 UTC

OK with current drm-next-4.17-wip.

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