[Bug 94645] New: [BAT] runtime PM fail in ilk wm programming

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94645

            Bug ID: 94645
           Summary: [BAT] runtime PM fail in ilk wm programming
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: daniel at ffwll.ch
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Happens on tons of machines, but rather erratically to reproduce it seems.
Example backtrace:



[  400.019129] ------------[ cut here ]------------
[  400.019183] WARNING: CPU: 0 PID: 6932 at
drivers/gpu/drm/i915/intel_uncore.c:649 __unclaimed_reg_debug+0x7e/0x90
[i915]()
[  400.019184] Unclaimed register detected before writing to register 0x45110
[  400.019185] Modules linked in: snd_hda_intel i915 snd_hda_codec_hdmi
x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
snd_hda_codec_realtek ghash_clmulni_intel snd_hda_codec_generic snd_hda_codec
snd_hwdep snd_hda_core mei_me i2c_hid snd_pcm mei i2c_designware_platform
lpc_ich i2c_designware_core r8169 mii sdhci_acpi sdhci mmc_core [last unloaded:
i915]
[  400.019198] CPU: 0 PID: 6932 Comm: kms_flip Tainted: G     U  W      
4.5.0-rc6-gfxbench+ #1
[  400.019199] Hardware name: GIGABYTE M4HM87P-00/M4HM87P-00, BIOS F6
12/10/2014
[  400.019200]  0000000000000000 ffff880036ed3910 ffffffff813fba95
ffff880036ed3958
[  400.019202]  ffffffffa039dd08 ffff880036ed3948 ffffffff81078711
0000000000045110
[  400.019204]  0000000000000001 0000000000000000 000000000892d200
0000000000000296
[  400.019206] Call Trace:
[  400.019209]  [<ffffffff813fba95>] dump_stack+0x67/0x92
[  400.019212]  [<ffffffff81078711>] warn_slowpath_common+0x81/0xc0
[  400.019213]  [<ffffffff81078797>] warn_slowpath_fmt+0x47/0x50
[  400.019224]  [<ffffffffa030401e>] __unclaimed_reg_debug+0x7e/0x90 [i915]
[  400.019234]  [<ffffffffa030b9fb>] hsw_write32+0x21b/0x270 [i915]
[  400.019242]  [<ffffffffa02b4b18>] _ilk_disable_lp_wm+0x98/0xd0 [i915]
[  400.019250]  [<ffffffffa02ba184>] ilk_program_watermarks+0x4e4/0x9a0 [i915]
[  400.019258]  [<ffffffffa02ba750>] ilk_optimize_watermarks+0x110/0x130 [i915]
[  400.019269]  [<ffffffffa032a074>] intel_atomic_commit+0x8b4/0x1610 [i915]
[  400.019272]  [<ffffffff8152b9aa>] ?
drm_atomic_set_crtc_for_connector+0x2a/0xe0
[  400.019273]  [<ffffffff8152c682>] drm_atomic_commit+0x32/0x50
[  400.019275]  [<ffffffff815090d5>] drm_atomic_helper_set_config+0x75/0xb0
[  400.019277]  [<ffffffff8151cac0>] drm_mode_set_config_internal+0x60/0x110
[  400.019279]  [<ffffffff815201d6>] drm_mode_setcrtc+0x186/0x4f0
[  400.019280]  [<ffffffff8118d0b8>] ? __might_fault+0x48/0xa0
[  400.019282]  [<ffffffff815120bd>] drm_ioctl+0x13d/0x590
[  400.019283]  [<ffffffff81520050>] ? drm_mode_setplane+0x1b0/0x1b0
[  400.019285]  [<ffffffff811e5c7a>] do_vfs_ioctl+0x8a/0x670
[  400.019287]  [<ffffffff81197b6a>] ? vm_munmap+0x4a/0x60
[  400.019289]  [<ffffffff811f1b2a>] ? __fget_light+0x6a/0x90
[  400.019290]  [<ffffffff811e629c>] SyS_ioctl+0x3c/0x70
[  400.019292]  [<ffffffff817c2e1b>] entry_SYSCALL_64_fastpath+0x16/0x73
[  400.019293] ---[ end trace 98c87d6dfcaa0a14 ]---

I've seen it on all ilk-style machines.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160321/d6da54f5/attachment.html>