[Bug 83769] [HSW-ULT] "SPLL enabled": WARNING: CPU: 3 PID: 168 at drivers/gpu/drm/i915/intel_display.c:7366 hsw_enable_pc8+0x5b8/0x660

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83769

--- Comment #5 from Andreas Reis <andreas.reis at gmail.com> ---
Created attachment 118823
  --> https://bugs.freedesktop.org/attachment.cgi?id=118823&action=edit
HSW 4770 snd_hda* warnings

Latest drm-intel-nightly. Noticed I also get this on every suspend with my
4200U (HM87):

[ 4847.185742] PM: suspend of devices complete after 947.984 msecs
[ 4847.190187] ------------[ cut here ]------------
[ 4847.190203] WARNING: CPU: 3 PID: 10228 at
drivers/gpu/drm/i915/intel_display.c:9297 hsw_enable_pc8+0x5f0/0x710()
[ 4847.190204] CPU PWM1 enabled
[ 4847.190223] Modules linked in: f2fs uas usb_storage iwlmvm iwlwifi elan_i2c
nfsd nfs auth_rpcgss oid_registry nfs_acl lockd grace sunrpc ip_tables x_tables
[ 4847.190229] CPU: 3 PID: 10228 Comm: kworker/u8:9 Tainted: G          I    
4.3.0-1-ck #1
[ 4847.190231] Hardware name: Notebook                         W840SU Series   
                /W840SU Series                    , BIOS 4.6.5 11/26/2013
[ 4847.190239] Workqueue: events_unbound async_run_entry_fn
[ 4847.190245]  0000000000000000 0000000016f72b4a ffff8800a0077c28
ffffffff813fdb09
[ 4847.190249]  ffff8800a0077c70 ffff8800a0077c60 ffffffff810eacc2
ffff8800d8e10000
[ 4847.190252]  ffff88021513a370 ffff88021513a380 ffff88021513a000
ffffffff81c3b1c3
[ 4847.190253] Call Trace:
[ 4847.190264]  [<ffffffff813fdb09>] dump_stack+0x4b/0x72
[ 4847.190270]  [<ffffffff810eacc2>] warn_slowpath_common+0x82/0xc0
[ 4847.190273]  [<ffffffff810ead5c>] warn_slowpath_fmt+0x5c/0x80
[ 4847.190279]  [<ffffffff815d32c0>] hsw_enable_pc8+0x5f0/0x710
[ 4847.190286]  [<ffffffff815567d3>] intel_suspend_complete+0x653/0x6e0
[ 4847.190290]  [<ffffffff81556882>] i915_drm_suspend_late+0x22/0x80
[ 4847.190294]  [<ffffffff815569c0>] ? i915_pm_poweroff_late+0x30/0x30
[ 4847.190297]  [<ffffffff815569e7>] i915_pm_suspend_late+0x27/0x30
[ 4847.190306]  [<ffffffff81626bae>] dpm_run_callback+0x4e/0x130
[ 4847.190312]  [<ffffffff8162764d>] __device_suspend_late+0xfd/0x210
[ 4847.190317]  [<ffffffff8162777f>] async_suspend_late+0x1f/0xa0
[ 4847.190320]  [<ffffffff8110abd8>] async_run_entry_fn+0x48/0x150
[ 4847.190326]  [<ffffffff8110297e>] process_one_work+0x14e/0x440
[ 4847.190330]  [<ffffffff81102cb8>] worker_thread+0x48/0x4a0
[ 4847.190336]  [<ffffffff819accdd>] ? __schedule+0x33d/0xa40
[ 4847.190339]  [<ffffffff81102c70>] ? process_one_work+0x440/0x440
[ 4847.190342]  [<ffffffff81102c70>] ? process_one_work+0x440/0x440
[ 4847.190348]  [<ffffffff81108508>] kthread+0xd8/0xf0
[ 4847.190354]  [<ffffffff81108430>] ? kthread_worker_fn+0x170/0x170
[ 4847.190359]  [<ffffffff819b121f>] ret_from_fork+0x3f/0x70
[ 4847.190364]  [<ffffffff81108430>] ? kthread_worker_fn+0x170/0x170
[ 4847.190367] ---[ end trace 188d5de2e2080113 ]---
[ 4847.201171] PM: late suspend of devices complete after 15.428 msecs

On my 4770 (Z87, one HDMI monitor) I get no such message, but instead the
attached snd messages.

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