[Bug 86105] [C220] Display goes blank with PCH PWM1 enabled warning in intel_display.c:7376/6900

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86105

--- Comment #19 from kamek <b.kamek at gmail.com> ---
Here we go again :



kamek [~] > dmesg
[ 1306.813242] ------------[ cut here ]------------
[ 1306.813252] WARNING: CPU: 0 PID: 4 at
drivers/gpu/drm/i915/intel_display.c:7376 hsw_enable_pc8+0x633/0x640 [i915]()
[ 1306.813253] PCH PWM1 enabled
[ 1306.813254] Modules linked in: msr cpufreq_stats fuse snd_hda_codec_hdmi
nls_ascii nls_cp437 vfat fat ecb btusb bluetooth hid_generic joydev mousedev
hid_apple coretemp intel_rapl x86_pkg_temp_thermal intel_powerclamp iTCO_wdt
iTCO_vendor_support wl(PO) kvm_intel kvm bcm5974 evdev crct10dif_pclmul
crc32_pclmul crc32c_intel usbhid hid mac_hid ghash_clmulni_intel ip6t_REJECT
nf_log_ipv6 applesmc aesni_intel led_class input_polldev hwmon aes_x86_64 lrw
gf128mul glue_helper ablk_helper cryptd xt_hl pcspkr snd_hda_codec_cirrus
cfg80211 snd_hda_codec_generic ip6t_rt i915 rfkill i2c_i801 lpc_ich shpchp
nf_conntrack_ipv6 nf_defrag_ipv6 drm_kms_helper snd_hda_intel
snd_hda_controller drm snd_hda_codec ipt_REJECT intel_gtt snd_hwdep
i2c_algo_bit sbs mei_me snd_pcm battery i2c_core sbshc xt_comment mei snd_timer
[ 1306.813292]  snd nf_log_ipv4 nf_log_common soundcore video apple_bl
processor ac button xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns
nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack
iptable_filter ip_tables x_tables sch_fq_codel ext4 crc16 mbcache jbd2 sd_mod
crc_t10dif crct10dif_common uas usb_storage ahci libahci libata scsi_mod
xhci_hcd usbcore usb_common
[ 1306.813314] CPU: 0 PID: 4 Comm: kworker/0:0 Tainted: P        W  O  
3.17.6-1-ARCH #1
[ 1306.813316] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC,
BIOS MBP111.88Z.0138.B11.1408291433 08/29/2014
[ 1306.813319] Workqueue: pm pm_runtime_work
[ 1306.813320]  0000000000000000 000000009482c0e9 ffff880263a8bbf8
ffffffff81537c3e
[ 1306.813323]  ffff880263a8bc40 ffff880263a8bc30 ffffffff8107079d
ffff88025e5b0000
[ 1306.813325]  ffff88026248a358 ffff88026248a368 ffff88026248a000
ffff880263649098
[ 1306.813328] Call Trace:
[ 1306.813331]  [<ffffffff81537c3e>] dump_stack+0x4d/0x6f
[ 1306.813334]  [<ffffffff8107079d>] warn_slowpath_common+0x7d/0xa0
[ 1306.813337]  [<ffffffff8107081c>] warn_slowpath_fmt+0x5c/0x80
[ 1306.813350]  [<ffffffffa03fd1a3>] hsw_enable_pc8+0x633/0x640 [i915]
[ 1306.813358]  [<ffffffffa03a2aa5>] intel_runtime_suspend+0x1a5/0x8c0 [i915]
[ 1306.813361]  [<ffffffff810136b2>] ? __switch_to+0x1b2/0x5e0
[ 1306.813366]  [<ffffffff812e6cff>] pci_pm_runtime_suspend+0x5f/0x150
[ 1306.813369]  [<ffffffff812e6ca0>] ? pci_legacy_suspend_late+0xe0/0xe0
[ 1306.813373]  [<ffffffff813b5812>] __rpm_callback+0x32/0x70
[ 1306.813376]  [<ffffffff813b5876>] rpm_callback+0x26/0xa0
[ 1306.813380]  [<ffffffff813b5dc1>] rpm_suspend+0x121/0x680
[ 1306.813383]  [<ffffffff810d6db8>] ? add_timer+0x18/0x30
[ 1306.813386]  [<ffffffff81087fbb>] ? __queue_delayed_work+0x8b/0x1c0
[ 1306.813390]  [<ffffffff813b764a>] pm_runtime_work+0x7a/0xd0
[ 1306.813393]  [<ffffffff81088e05>] process_one_work+0x145/0x400
[ 1306.813396]  [<ffffffff810893cb>] worker_thread+0x6b/0x4a0
[ 1306.813399]  [<ffffffff81089360>] ? init_pwq.part.22+0x10/0x10
[ 1306.813402]  [<ffffffff8108e2ea>] kthread+0xea/0x100
[ 1306.813404]  [<ffffffff8108e200>] ? kthread_create_on_node+0x1b0/0x1b0
[ 1306.813408]  [<ffffffff8153dbbc>] ret_from_fork+0x7c/0xb0
[ 1306.813410]  [<ffffffff8108e200>] ? kthread_create_on_node+0x1b0/0x1b0
[ 1306.813412] ---[ end trace c6138abb0f381238 ]---



kamek [~] > sudo cat /sys/kernel/debug/dri/0/i915_power_domain_info
Power well/domain         Use count
always-on                 0
  PIPE_A                  1
  TRANSCODER_EDP          1
  PORT_DDI_A_2_LANES      0
  PORT_DDI_A_4_LANES      -2
  PORT_DDI_B_2_LANES      0
  PORT_DDI_B_4_LANES      0
  PORT_DDI_C_2_LANES      0
  PORT_DDI_C_4_LANES      0
  PORT_DDI_D_2_LANES      0
  PORT_DDI_D_4_LANES      0
  PORT_CRT                0
  PLLS                    0
  INIT                    0
display                   0
  PIPE_B                  0
  PIPE_C                  0
  PIPE_A_PANEL_FITTER     0
  PIPE_B_PANEL_FITTER     0
  PIPE_C_PANEL_FITTER     0
  TRANSCODER_A            0
  TRANSCODER_B            0
  TRANSCODER_C            0
  PORT_DSI                0
  PORT_OTHER              0
  VGA                     0
  AUDIO                   0
  INIT                    0

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