[Bug 94390] New: [SKL-Y] GuC does not load when resuming from suspend to DISK

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94390

            Bug ID: 94390
           Summary: [SKL-Y] GuC does not load when resuming from suspend
                    to DISK
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: christophe.prigent at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 122103
  --> https://bugs.freedesktop.org/attachment.cgi?id=122103&action=edit
dmesg

Hardware
Platform: SKY LAKE Y A0 QUAL
CPU : Intel(R) Core(TM) m5-6Y57 CPU @ 1.10GHz (family: 6, model: 78  stepping:
3)
MCP : SKL-Y  D1 2+2 (ou ULX-D1)
QDF : QJK9 
CPU : SKL D0
Chipset PCH: Sunrise Point LP C0       
CRB : SKY LAKE Y LPDDR3 RVP3 CRB FAB2
Reworks : All Mandatories + FBS02 & FBS03, O-06
Software 
Linux OS : Ubuntu 15.04 64 bits
BIOS : SKLSE2R1.R00.B104.B01.1511110114
ME FW : 11.0.0.1191
Ksc (EC FW): 1.20
Kernel: drm-intel-nightly 4.5.0-rc6 from http://cgit.freedesktop.org/drm-intel
With patch applied from:
https://patchwork.freedesktop.org/patch/74962/
https://lists.freedesktop.org/archives/intel-gfx/2016-February/088390.html
Guc 6.1


Steps:
-------
1. Execute command:
sudo -s
echo disk > /sys/power/state
2. Wait a moment
3. resume with keyboard
4. Check GuC load status from kernel debugfs with:
cat /sys/kernel/debug/dri/0/i915_guc_load_status

Actual result:
--------------
4. GuC is not loaded, confirmed from kernel log:
[   91.298855] [drm:intel_guc_ucode_load] GuC fw status: path
i915/skl_guc_ver6.bin, fetch SUCCESS, load SUCCESS
[   91.298858] [drm:intel_guc_ucode_load] GuC fw status: fetch SUCCESS, load
PENDING
[   91.403585] [drm:guc_ucode_xfer_dma] DMA status 0x10, GuC status 0x800570ec
[   91.403585] [drm:guc_ucode_xfer_dma] returning -110
[   91.403586] [drm:intel_guc_ucode_load] GuC firmware load fail, err -110
[   91.423518] [drm:host2guc_action [i915]] *ERROR* GUC: host2guc action 0x20
failed. ret=-110 status=0x00000020 response=0x40000000
[   91.423585] [drm:intel_guc_ucode_load] falling back to execlist mode, err 0

Expected result:
----------------
4. GuC is successfully loaded

Info
----
Not reproduced with suspend to Freeze and RAM

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