[Bug 95149] [KBL] Error DC state mismatch when suspending to disk

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95149

--- Comment #8 from cprigent <christophe.prigent at intel.com> ---
Created attachment 123626
  --> https://bugs.freedesktop.org/attachment.cgi?id=123626&action=edit
kbl-dmesg-igt-all

Patch v3 is already available with last kernel from nightly

While launching IGT all, I see this error several times:
root at KBLU1:~# grep -i "DC state mismatch" /var/log/kern.log
May 11 11:42:13 KBLU1 kernel: [   44.501739] [drm:gen9_set_dc_state [i915]]
*ERROR* DC state mismatch (0x0 -> 0x2)
May 11 11:52:37 KBLU1 kernel: [  597.702751] [drm:gen9_set_dc_state [i915]]
*ERROR* DC state mismatch (0x0 -> 0x2)
May 11 12:24:05 KBLU1 kernel: [  254.040659] [drm:gen9_set_dc_state [i915]]
*ERROR* DC state mismatch (0x0 -> 0x2)
May 11 14:19:44 KBLU1 kernel: [  385.919901] [drm:gen9_set_dc_state [i915]]
*ERROR* DC state mismatch (0x0 -> 0x2)
May 11 16:16:15 KBLU1 kernel: [   26.853465] [drm:gen9_set_dc_state [i915]]
*ERROR* DC state mismatch (0x0 -> 0x2)
May 11 17:34:49 KBLU1 kernel: [    7.389852] [drm:gen9_set_dc_state [i915]]
*ERROR* DC state mismatch (0x0 -> 0x2)

The right firmware is loaded:
root at KBLU1:~# dmesg |grep dmc
May 11 17:41:43 KBLU1 kernel: [    1.788870] [drm:intel_csr_ucode_init] Loading
i915/kbl_dmc_ver1.bin
May 11 17:41:43 KBLU1 kernel: [    1.789281] [drm] Finished loading
i915/kbl_dmc_ver1.bin (v1.1)

root at KBLU1:~# cat /sys/kernel/debug/dri/0/i915_dmc_info
fw loaded: yes
path: i915/kbl_dmc_ver1.bin
version: 1.1
program base: 0x09004040
ssp base: 0x00002fc0
htp: 0x00b40068

Tested with same platform
Kernel: drm-intel-nightly 4.6.0-rc7 61f856f from
http://cgit.freedesktop.org/drm-intel/
  commit 61f856faa1e6ff9dddad214be1e372e8aacfc0f4
  Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
  Date:   Mon May 9 19:24:21 2016 +0300
  drm-intel-nightly: 2016y-05m-09d-16h-24m-01s UTC integration manifest
drm: libdrm 2.4.68 ea78c17 from git://anongit.freedesktop.org/mesa/drm
cairo: 1.15.2 db8a7f1 from git://anongit.freedesktop.org/cairo
IGT: 1.14 cc24755 from
http://anongit.freedesktop.org/git/xorg/app/intel-gpu-tools.git

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160511/3ce651c4/attachment.html>