Bug 97293

Summary: New warning in i915 on 4.8-rc1
Product: DRI Reporter: Mike Lothian <mike>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED INVALID QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs, mike
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: SKL i915 features: display/atomic
Attachments:
Description Flags
dmesg none

Description Mike Lothian 2016-08-11 10:12:07 UTC 
Created attachment 125698 [details]
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 ]---
Comment 1 Mike Lothian 2016-08-13 16:06:20 UTC 
And another one

[ 1483.773399] ------------[ cut here ]------------
[ 1483.773416] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/drm_irq.c:1168 page_flip_completed+0x32/0xd0
[ 1483.773418] Modules linked in:
[ 1483.773426] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.8.0-rc1-agd5f+ #20
[ 1483.773427] Hardware name: Alienware Alienware 15 R2/Alienware 15 R2, BIOS 1.2.8 01/29/2016
[ 1483.773429]  0000000000000000 ffffffff8134fc4c 0000000000000000 0000000000000000
[ 1483.773433]  ffffffff8108e809 ffff8804b2292000 ffff88048b759a80 ffff8804b22a0000
[ 1483.773437]  0000000000000000 0000000080010000 0000000000044408 ffffffff81587ac2
[ 1483.773441] Call Trace:
[ 1483.773442]  <IRQ>  [<ffffffff8134fc4c>] ? dump_stack+0x46/0x5a
[ 1483.773450]  [<ffffffff8108e809>] ? __warn+0xb9/0xe0
[ 1483.773453]  [<ffffffff81587ac2>] ? page_flip_completed+0x32/0xd0
[ 1483.773458]  [<ffffffff8159f801>] ? intel_finish_page_flip_mmio+0x61/0x70
[ 1483.773461]  [<ffffffff81520bd2>] ? intel_pipe_handle_vblank+0x22/0x30
[ 1483.773464]  [<ffffffff815250cb>] ? gen8_irq_handler+0x33b/0x670
[ 1483.773468]  [<ffffffff810d4983>] ? __handle_irq_event_percpu+0x73/0x1b0
[ 1483.773471]  [<ffffffff810d4adb>] ? handle_irq_event_percpu+0x1b/0x50
[ 1483.773474]  [<ffffffff810d4b3f>] ? handle_irq_event+0x2f/0x50
[ 1483.773477]  [<ffffffff810d7a2d>] ? handle_edge_irq+0x6d/0x130
[ 1483.773481]  [<ffffffff8101b844>] ? handle_irq+0x14/0x20
[ 1483.773484]  [<ffffffff8101b101>] ? do_IRQ+0x41/0xd0
[ 1483.773487]  [<ffffffff81087249>] ? common_interrupt+0x89/0x89
[ 1483.773490]  [<ffffffff810b57eb>] ? idle_cpu+0xb/0x50
[ 1483.773494]  [<ffffffff810c298b>] ? find_busiest_group+0x1cb/0x950
[ 1483.773498]  [<ffffffff810c3267>] ? load_balance+0x157/0x920
[ 1483.773501]  [<ffffffff816ddaaf>] ? synaptics_process_byte+0x4f/0xe0
[ 1483.773504]  [<ffffffff810c400f>] ? rebalance_domains+0x14f/0x2a0
[ 1483.773507]  [<ffffffff81093a24>] ? __do_softirq+0x104/0x2d0
[ 1483.773511]  [<ffffffff81093d20>] ? irq_exit+0x90/0xa0
[ 1483.773514]  [<ffffffff81038dac>] ? smp_apic_timer_interrupt+0x3c/0x50
[ 1483.773517]  [<ffffffff810874e9>] ? apic_timer_interrupt+0x89/0x90
[ 1483.773518]  <EOI>  [<ffffffff8173690b>] ? cpuidle_enter_state+0x11b/0x2d0
[ 1483.773525]  [<ffffffff817368f4>] ? cpuidle_enter_state+0x104/0x2d0
[ 1483.773528]  [<ffffffff810c9b5f>] ? cpu_startup_entry+0x25f/0x300
[ 1483.773532]  [<ffffffff82334e7c>] ? start_kernel+0x3b6/0x3be
[ 1483.773534] ---[ end trace 3f8a29f25490fc2f ]---
Comment 2 Jani Nikula 2016-08-16 11:34:29 UTC 
(In reply to Mike Lothian from comment #1)
> And another one

What do these two have to do with each other?
Comment 3 Mike Lothian 2016-08-16 18:29:23 UTC 
They were both introduced in this release cycle - I've no idea if they were introduced by the same commit

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