[Bug 216119] 087451f372bf76d breaks hibernation on amdgpu Radeon R9 390

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216119

Mario Limonciello (AMD) (mario.limonciello@amd.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mario.limonciello@amd.com

--- Comment #34 from Mario Limonciello (AMD) (mario.limonciello@amd.com) ---
I recently became aware that the WX3200 in my workstation wasn't working
properly after suspend-to-ram.

61:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Lexa XT [Radeon PRO WX 3200] [1002:6981] (rev 10)

I ran a bisect, and unfortunately it came up to the commit that was created for
this bug
(https://github.com/torvalds/linux/commit/3a4b1cc28fbdc2325b3e3ed7d8024995a75f9216)

$ git bisect log
git bisect start '--term-new=broken' '--term-old=good'
# good: [4b0986a3613c92f4ec1bdc7f60ec66fea135991f] Linux 5.18
git bisect good 4b0986a3613c92f4ec1bdc7f60ec66fea135991f
# broken: [8843bf1f0737ecea456d2bbd19d4263d49f2d110] Linux 5.18.16
git bisect broken 8843bf1f0737ecea456d2bbd19d4263d49f2d110
# good: [ffd4c4d5293e4985092ea45ba21cad9326e2e434] drivers: staging: rtl8192e:
Fix deadlock in rtllib_beacons_stop()
git bisect good ffd4c4d5293e4985092ea45ba21cad9326e2e434
# good: [164f0714bae175e2f5737070d037d7475417228d] pinctrl: sunxi: a83t: Fix
NAND function name for some pins
git bisect good 164f0714bae175e2f5737070d037d7475417228d
# broken: [86fbd2844858c5aef57a28ebc3d53d298f37cc67] x86/retpoline: Use
-mfunction-return
git bisect broken 86fbd2844858c5aef57a28ebc3d53d298f37cc67
# broken: [7fc7c6d053cfca70bb81892f3f00937e5c459d5a] arm64: dts: broadcom:
bcm4908: Fix cpu node for smp boot
git bisect broken 7fc7c6d053cfca70bb81892f3f00937e5c459d5a
# good: [cd52154b924f2ea05069d4296045d9fd56a8da23] ALSA: hda - Add fixup for
Dell Latitidue E5430
git bisect good cd52154b924f2ea05069d4296045d9fd56a8da23
# good: [b8651049bdd77fa652bcf0f3157911a3a6fc4f2f] net/mlx5e: CT: Use own
workqueue instead of mlx5e priv
git bisect good b8651049bdd77fa652bcf0f3157911a3a6fc4f2f
# broken: [594cea2c09f7cd440d1ee1c4547d5bc6a646b0e4] netfilter: conntrack:
remove the percpu dying list
git bisect broken 594cea2c09f7cd440d1ee1c4547d5bc6a646b0e4
# broken: [cd486308d773d6d062a0140062458b48f8a0eb6b] ASoC: tas2764: Add post
reset delays
git bisect broken cd486308d773d6d062a0140062458b48f8a0eb6b
# broken: [4ffcacab7145080187330accafae69e87a481eec] drm/amdgpu/display:
disable prefer_shadow for generic fb helpers
git bisect broken 4ffcacab7145080187330accafae69e87a481eec
# good: [16427298f3dc02ec90bdfa31c8ef9b384ea5534a] net/mlx5e: Ring the TX
doorbell on DMA errors
git bisect good 16427298f3dc02ec90bdfa31c8ef9b384ea5534a
# good: [27dccf616a0a82f4d8004b7ee04560e7de419e63] drm/amdgpu: keep fbdev
buffers pinned during suspend
git bisect good 27dccf616a0a82f4d8004b7ee04560e7de419e63
# first broken commit: [4ffcacab7145080187330accafae69e87a481eec]
drm/amdgpu/display: disable prefer_shadow for generic fb helpers

It seems that a revert of that commit isn't the best solution as it's just
trading the S3 failure I see for your S4 failure.  But also it seems that from
your comment #32 there is still an underlying problem with using the fbdev
helper, albeit improved for you in S3.

Would you mind contrasting if S3 is working for you with/without that commit?

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