[Bug 97293] New: New warning in i915 on 4.8-rc1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97293

            Bug ID: 97293
           Summary: New warning in i915 on 4.8-rc1
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: mike at fireburn.co.uk
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 125698
  --> https://bugs.freedesktop.org/attachment.cgi?id=125698&action=edit
dmesg

[39910.313263] ------------[ cut here ]------------
[39910.313270] WARNING: CPU: 6 PID: 464 at
drivers/gpu/drm/i915/intel_display.c:14110 skl_max_scale.part.120+0x6c/0x80
[39910.313271] WARN_ON_ONCE(!crtc_clock || cdclk < crtc_clock)
[39910.313272] Modules linked in:
[39910.313274] CPU: 6 PID: 464 Comm: X Tainted: G        W      
4.8.0-rc1-agd5f+ #20
[39910.313275] Hardware name: Alienware Alienware 15 R2/Alienware 15 R2, BIOS
1.2.8 01/29/2016
[39910.313278]  0000000000000000 ffffffff8134fc4c ffff8804a20339f8
0000000000000000
[39910.313280]  ffffffff8108e809 ffff8804ad7ec000 ffff8804a2033a48
ffff8804c3726000
[39910.313282]  0000000000000000 ffff8804ad7ec000 ffff8804b2066c00
ffffffff8108e87a
[39910.313282] Call Trace:
[39910.313287]  [<ffffffff8134fc4c>] ? dump_stack+0x46/0x5a
[39910.313290]  [<ffffffff8108e809>] ? __warn+0xb9/0xe0
[39910.313291]  [<ffffffff8108e87a>] ? warn_slowpath_fmt+0x4a/0x50
[39910.313295]  [<ffffffff81450158>] ?
drm_atomic_helper_normalize_zpos+0x248/0x2e0
[39910.313297]  [<ffffffff8158e35c>] ? skl_max_scale.part.120+0x6c/0x80
[39910.313299]  [<ffffffff8158e42b>] ? intel_check_primary_plane+0xbb/0xd0
[39910.313301]  [<ffffffff81450158>] ?
drm_atomic_helper_normalize_zpos+0x248/0x2e0
[39910.313304]  [<ffffffff81580030>] ? intel_plane_atomic_check+0x120/0x1c0
[39910.313307]  [<ffffffff8144d368>] ?
drm_atomic_helper_check_planes+0x78/0x1e0
[39910.313310]  [<ffffffff8159994e>] ? intel_atomic_check+0x14e/0x770
[39910.313313]  [<ffffffff811a0cf5>] ? __kmalloc_track_caller+0x25/0x180
[39910.313314]  [<ffffffff81470ffc>] ? drm_atomic_check_only+0x17c/0x600
[39910.313317]  [<ffffffff8157f9fe>] ? intel_crtc_duplicate_state+0x2e/0x70
[39910.313318]  [<ffffffff8147148d>] ? drm_atomic_commit+0xd/0x50
[39910.313321]  [<ffffffff8144f3c1>] ?
drm_atomic_helper_disable_plane+0xa1/0xe0
[39910.313324]  [<ffffffff814611a7>] ? __setplane_internal+0x177/0x280
[39910.313327]  [<ffffffff814613c2>] ? drm_mode_cursor_universal+0x112/0x1f0
[39910.313330]  [<ffffffff81461513>] ? drm_mode_cursor_common+0x73/0x170
[39910.313331]  [<ffffffff8146569f>] ? drm_mode_cursor_ioctl+0x3f/0x50
[39910.313333]  [<ffffffff81458a12>] ? drm_ioctl+0x272/0x400
[39910.313334]  [<ffffffff81465660>] ? drm_mode_setcrtc+0x530/0x530
[39910.313337]  [<ffffffff81019137>] ? do_signal+0x177/0x5b0
[39910.313340]  [<ffffffff81024419>] ? __fpu__restore_sig+0x79/0x4c0
[39910.313343]  [<ffffffff811cb46b>] ? do_vfs_ioctl+0x8b/0x5c0
[39910.313345]  [<ffffffff81099e11>] ? recalc_sigpending+0x11/0x40
[39910.313347]  [<ffffffff811d54ab>] ? __fget+0x6b/0xb0
[39910.313349]  [<ffffffff811cb9d6>] ? SyS_ioctl+0x36/0x70
[39910.313351]  [<ffffffff81001c39>] ? do_syscall_64+0x59/0x140
[39910.313353]  [<ffffffff810869bc>] ? entry_SYSCALL64_slow_path+0x25/0x25
[39910.313354] ---[ end trace 3d4f93615b43a667 ]---

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