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Date:	Tue, 29 Jul 2014 10:43:02 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Ville Syrjälä <ville.syrjala@...ux.intel.com>
CC:	Daniel Vetter <daniel.vetter@...ll.ch>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [LKP] [drm/i915] WARNING: CPU: 3 PID: 248 at drivers/gpu/drm/i915/intel_pm.c:6427
 check_power_well_state+0x60/0x90 [i915]()

FYI, we noticed the below changes on

git://people.freedesktop.org/~danvet/drm colder-fusion
commit 571484b4d8c2f23feebcd7e0d9259174650b5da0 ("drm/i915: Add chv cmnlane power wells")

+-----------------+------------+------------+
|                 | ad593b242a | 571484b4d8 |
+-----------------+------------+------------+
| boot_successes  | 10         | 10         |
| early-boot-hang | 1          | 1          |
+-----------------+------------+------------+


[   11.884746] fbcon: inteldrmfb (fb0) is primary device
[   12.012144] [drm:vlv_set_power_well] *ERROR* timout setting power well state 03000000 (00000000)
[   12.012146] ------------[ cut here ]------------
[   12.012179] WARNING: CPU: 3 PID: 248 at drivers/gpu/drm/i915/intel_pm.c:6427 check_power_well_state+0x60/0x90 [i915]()
[   12.012180] state mismatch for 'dpio-common-d' (always_on 0 hw state 1 use-count 0 disable_power_well 1
[   12.012189] Modules linked in: ata_generic(+) snd_hda_intel(+) snd_hda_controller i915(+) snd_hda_codec firewire_ohci video firewire_core drm_kms_helper nuvoton_cir crc_itu_t pata_acpi snd_hwdep ahci serio_raw snd_pcm libahci snd_timer parport_pc snd floppy(+) parport pcspkr libata rc_core soundcore i2c_i801 drm
[   12.012191] CPU: 3 PID: 248 Comm: modprobe Not tainted 3.16.0-rc7-02031-g4efe1515 #1
[   12.012192] Hardware name:                  /DQ67SW, BIOS SWQ6710H.86A.0047.2011.0222.1058 02/22/2011
[   12.012194]  0000000000000009 ffff88007fabb2f8 ffffffff8182e6de ffff88007fabb340
[   12.012195]  ffff88007fabb330 ffffffff8106d0ed ffffffffa0294860 ffffffffa0294860
[   12.012196]  0000000001000000 ffff88007f0e8568 ffff88007f0e0000 ffff88007fabb390
[   12.012197] Call Trace:
[   12.012201]  [<ffffffff8182e6de>] dump_stack+0x4d/0x66
[   12.012204]  [<ffffffff8106d0ed>] warn_slowpath_common+0x7d/0xa0
[   12.012206]  [<ffffffff8106d15c>] warn_slowpath_fmt+0x4c/0x50
[   12.012218]  [<ffffffffa01d885d>] ? vlv_power_well_enabled+0x7d/0xa0 [i915]
[   12.012228]  [<ffffffffa01d9160>] check_power_well_state+0x60/0x90 [i915]
[   12.012241]  [<ffffffffa01e05c5>] intel_display_power_put+0xe5/0x160 [i915]
[   12.012259]  [<ffffffffa022a73a>] intel_display_set_init_power+0x2a/0x50 [i915]
[   12.012273]  [<ffffffffa022a852>] modeset_update_crtc_power_domains+0xf2/0x150 [i915]
[   12.012286]  [<ffffffffa022ac1e>] snb_modeset_global_resources+0xe/0x10 [i915]
[   12.012297]  [<ffffffffa022bf48>] __intel_set_mode+0x5d8/0xab0 [i915]
[   12.012310]  [<ffffffffa0233c06>] intel_set_mode+0x16/0x30 [i915]
[   12.012321]  [<ffffffffa0234b4c>] intel_crtc_set_config+0x91c/0xe50 [i915]
[   12.012333]  [<ffffffffa00191b4>] drm_mode_set_config_internal+0x64/0xf0 [drm]
[   12.012338]  [<ffffffffa0108803>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
[   12.012341]  [<ffffffffa0108853>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
[   12.012344]  [<ffffffffa010a418>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
[   12.012359]  [<ffffffffa023e40a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[   12.012361]  [<ffffffff81438994>] fbcon_init+0x4f4/0x580
[   12.012363]  [<ffffffff814afbc8>] visual_init+0xb8/0x120
[   12.012365]  [<ffffffff814b20c3>] do_bind_con_driver+0x163/0x330
[   12.012367]  [<ffffffff814b2844>] do_take_over_console+0x114/0x1c0
[   12.012368]  [<ffffffff814340e3>] do_fbcon_takeover+0x63/0xd0
[   12.012369]  [<ffffffff8143943d>] fbcon_event_notify+0x68d/0x7e0
[   12.012371]  [<ffffffff810951fc>] notifier_call_chain+0x4c/0x70
[   12.012373]  [<ffffffff8109556d>] __blocking_notifier_call_chain+0x4d/0x70
[   12.012374]  [<ffffffff810955a6>] blocking_notifier_call_chain+0x16/0x20
[   12.012376]  [<ffffffff8143f97b>] fb_notifier_call_chain+0x1b/0x20
[   12.012378]  [<ffffffff81441ba6>] register_framebuffer+0x1e6/0x320
[   12.012381]  [<ffffffffa010a75e>] drm_fb_helper_initial_config+0x2fe/0x4b0 [drm_kms_helper]
[   12.012394]  [<ffffffffa02171ca>] ? gen6_write32+0x6a/0x120 [i915]
[   12.012408]  [<ffffffffa023f59f>] intel_fbdev_initial_config+0x1f/0x30 [i915]
[   12.012424]  [<ffffffffa0263c2d>] i915_driver_load+0xfbd/0x1050 [i915]
[   12.012427]  [<ffffffff813df1f8>] ? kobject_uevent_env+0x178/0x690
[   12.012429]  [<ffffffff814e05c7>] ? get_device+0x17/0x30
[   12.012431]  [<ffffffff814e5c55>] ? klist_class_dev_get+0x15/0x20
[   12.012433]  [<ffffffff8181c3ba>] ? klist_add_tail+0x3a/0x40
[   12.012434]  [<ffffffff814e1cf9>] ? device_add+0x1f9/0x610
[   12.012442]  [<ffffffffa0017156>] ? drm_sysfs_device_add+0xd6/0x120 [drm]
[   12.012448]  [<ffffffffa001377d>] drm_dev_register+0xad/0x100 [drm]
[   12.012455]  [<ffffffffa001624f>] drm_get_pci_dev+0x8f/0x1f0 [drm]
[   12.012467]  [<ffffffffa01d359b>] i915_pci_probe+0x3b/0x60 [i915]
[   12.012469]  [<ffffffff81413b05>] local_pci_probe+0x45/0xa0
[   12.012470]  [<ffffffff81414c95>] ? pci_match_device+0xe5/0x110
[   12.012472]  [<ffffffff81414dd1>] pci_device_probe+0xd1/0x130
[   12.012474]  [<ffffffff814e4d90>] driver_probe_device+0x90/0x3c0
[   12.012475]  [<ffffffff814e5193>] __driver_attach+0x93/0xa0
[   12.012476]  [<ffffffff814e5100>] ? __device_attach+0x40/0x40
[   12.012477]  [<ffffffff814e2e13>] bus_for_each_dev+0x63/0xa0
[   12.012479]  [<ffffffff814e482e>] driver_attach+0x1e/0x20
[   12.012480]  [<ffffffff814e4440>] bus_add_driver+0x180/0x250
[   12.012481]  [<ffffffff814e5964>] driver_register+0x64/0xf0
[   12.012483]  [<ffffffff8141349c>] __pci_register_driver+0x4c/0x50
[   12.012489]  [<ffffffffa00164ba>] drm_pci_init+0x10a/0x140 [drm]
[   12.012490]  [<ffffffffa02bb000>] ? 0xffffffffa02bafff
[   12.012502]  [<ffffffffa02bb089>] i915_init+0x89/0x90 [i915]
[   12.012503]  [<ffffffff8100212c>] do_one_initcall+0xbc/0x1f0
[   12.012505]  [<ffffffff811aa7d5>] ? kfree+0x125/0x160
[   12.012507]  [<ffffffff81190a52>] ? __vunmap+0xb2/0x100
[   12.012510]  [<ffffffff810ed15c>] load_module+0x15fc/0x1a30
[   12.012511]  [<ffffffff810e8cf0>] ? store_uevent+0x40/0x40
[   12.012514]  [<ffffffff810ed651>] SyS_init_module+0xc1/0x110
[   12.012517]  [<ffffffff81837569>] system_call_fastpath+0x16/0x1b
[   12.012517] ---[ end trace e371d25afd03c5d0 ]---
[   12.065249] ata1: SATA link down (SStatus 0 SControl 300)



Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.

Thanks,
Aaron

View attachment "reproduce" of type "text/plain" (293 bytes)

View attachment "dmesg" of type "text/plain" (149185 bytes)

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