[Bug 92935] New: Warnings on suspend/resume: CSR SSP Base Not fine, CSR HTP Not fine, DC6 already programmed to be disabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92935

            Bug ID: 92935
           Summary: Warnings on suspend/resume: CSR SSP Base Not fine, CSR
                    HTP Not fine, DC6 already programmed to be disabled
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: timur.alperovich at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 119626
  --> https://bugs.freedesktop.org/attachment.cgi?id=119626&action=edit
dmesg output

I noticed the following error in dmesg when suspending/resuming:
[  264.289328] Trying to free nonexistent resource
<000000000000e000-000000000000e0ff>
[  264.289489] PM: suspend of devices complete after 163.064 msecs
[  264.289896] ------------[ cut here ]------------
[  264.289941] WARNING: CPU: 0 PID: 1814 at
drivers/gpu/drm/i915/intel_runtime_pm.c:465 skl_enable_dc6+0x1dc/0x2d0 [i915]()
[  264.289943] CSR SSP Base Not fine
[  264.290316] WARNING: CPU: 0 PID: 1814 at
drivers/gpu/drm/i915/intel_runtime_pm.c:466 skl_enable_dc6+0x20d/0x2d0 [i915]()
[  264.290317] CSR HTP Not fine
[  265.329897] WARNING: CPU: 1 PID: 1864 at
drivers/gpu/drm/i915/intel_runtime_pm.c:558 skl_disable_dc6+0x93/0xc0 [i915]()
[  265.329898] DC6 already programmed to be disabled.

distribution: Debian (testing)
uname -m: x86_64
uname -r: drm-intel-nightly build; the last commit is: 4c2531304c0a
model: Dell XPS 9350 (i7-6500U)
no external display connected

dmesg debug output attached.

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