274ad65c9d02 ("drm/radeon: hard reset r600 and newer GPU when hibernating.")

[Borislav Petkov]

Hi,

commit in $Subject breaks suspend to disk on my box here. Reverting it
ontop of 4.7-rc2 fixes the problem. DRM-specific messages in dmesg are:

[    6.837698] [drm] radeon kernel modesetting enabled.
[    6.871372] [drm] initializing kernel modesetting (RV635 0x1002:0x9598 0x1043:0x01DA 0x00).
[    6.871387] [drm] register mmio base: 0xFEA20000
[    6.871388] [drm] register mmio size: 65536
[    6.871497] [drm] Detected VRAM RAM=512M, BAR=256M
[    6.871498] [drm] RAM width 128bits DDR
[    6.875602] [drm] radeon: 512M of VRAM memory ready
[    6.875603] [drm] radeon: 512M of GTT memory ready.
[    6.875619] [drm] Loading RV635 Microcode
[    6.888041] [drm] Internal thermal controller without fan control
[    6.888100] [drm] radeon: power management initialized
[    6.892400] [drm] GART: num cpu pages 131072, num gpu pages 131072
[    6.893273] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
[    6.920032] [drm] PCIE GART of 512M enabled (table at 0x0000000000142000).
[    6.920232] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    6.920232] [drm] Driver supports precise vblank timestamp query.
[    6.920290] [drm] radeon: irq initialized.
[    6.951284] [drm] ring test on 0 succeeded in 0 usecs
[    7.125955] [drm] ring test on 5 succeeded in 1 usecs
[    7.131079] [drm] UVD initialized successfully.
[    7.135817] [drm] ib test on ring 0 succeeded in 0 usecs
[    7.789092] [drm] ib test on ring 5 succeeded
[    7.794502] [drm] Radeon Display Connectors
[    7.798817] [drm] Connector 0:
[    7.801963] [drm]   DVI-I-1
[    7.804825] [drm]   HPD1
[    7.807430] [drm]   DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c
[    7.814942] [drm]   Encoders:
[    7.817985] [drm]     DFP1: INTERNAL_UNIPHY
[    7.822230] [drm]     CRT2: INTERNAL_KLDSCP_DAC2
[    7.826913] [drm] Connector 1:
[    7.830033] [drm]   DIN-1
[    7.832715] [drm]   Encoders:
[    7.835751] [drm]     TV1: INTERNAL_KLDSCP_DAC2
[    7.840349] [drm] Connector 2:
[    7.843466] [drm]   DVI-I-2
[    7.846326] [drm]   HPD2
[    7.848926] [drm]   DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[    7.856437] [drm]   Encoders:
[    7.859479] [drm]     CRT1: INTERNAL_KLDSCP_DAC1
[    7.864162] [drm]     DFP2: INTERNAL_KLDSCP_LVTMA
[    7.941480] [drm] fb mappable at 0xC0243000
[    7.945733] [drm] vram apper at 0xC0000000
[    7.949897] [drm] size 9216000
[    7.953019] [drm] fb depth is 24
[    7.956327] [drm]    pitch is 7680
[    7.959930] fbcon: radeondrmfb (fb0) is primary device
[    8.028816] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
[    8.045087] [drm] Initialized radeon 2.45.0 20080528 for 0000:01:00.0 on minor 0
[   28.158851] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
[   28.160612] [drm] PCIE GART of 512M enabled (table at 0x0000000000142000).
[   28.191669] [drm] ring test on 0 succeeded in 1 usecs
[   28.366319] [drm] ring test on 5 succeeded in 1 usecs
[   28.366323] [drm] UVD initialized successfully.
[   28.366338] [drm] ib test on ring 0 succeeded in 0 usecs
[   28.604362] ata1.00: supports DRM functions and may not be fully accessible
[   28.604405] ata2.00: supports DRM functions and may not be fully accessible
[   28.609305] ata1.00: supports DRM functions and may not be fully accessible
[   28.609410] ata2.00: supports DRM functions and may not be fully accessible
[   29.014440] [drm] ib test on ring 5 succeeded


-- 
Regards/Gruss,
    Boris.

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