Kernel oops with LCDC controller.

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andyp
Posts: 8
Joined: Thu Oct 09, 2014 12:19 pm

Kernel oops with LCDC controller.

Fri Jul 19, 2019 5:37 pm

I have a 4.19.56 kernel built under Yocto from linux-4.19-at91 commit de133ed13c33922a53eeacb6d9d501027afbf07b. About 30 seconds or so after the wayland desktop starts a kernel oops is generated and the screen goes black...

Code: Select all

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5 at drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c:306 atmel_hlcdc_crtc_atomic_begin+0x54/0x58
Modules linked in:
CPU: 0 PID: 5 Comm: kworker/u2:0 Not tainted 4.19.56-linux4sam-6.1 #1
Hardware name: Atmel SAMA5
Workqueue: atmel-hlcdc-dc atmel_hlcdc_dc_atomic_work
[<c010da04>] (unwind_backtrace) from [<c010ada4>] (show_stack+0x10/0x14)
[<c010ada4>] (show_stack) from [<c0117740>] (__warn+0xd8/0xf0)
[<c0117740>] (__warn) from [<c0117798>] (warn_slowpath_null+0x40/0x48)
[<c0117798>] (warn_slowpath_null) from [<c03ecb20>] (atmel_hlcdc_crtc_atomic_begin+0x54/0x58)
[<c03ecb20>] (atmel_hlcdc_crtc_atomic_begin) from [<c03b990c>] (drm_atomic_helper_commit_planes+0x7c/0x270)
[<c03b990c>] (drm_atomic_helper_commit_planes) from [<c03ed4cc>] (atmel_hlcdc_dc_atomic_complete+0x30/0x8c)
[<c03ed4cc>] (atmel_hlcdc_dc_atomic_complete) from [<c012b138>] (process_one_work+0x1c8/0x3e8)
[<c012b138>] (process_one_work) from [<c012b3b0>] (worker_thread+0x58/0x57c)
[<c012b3b0>] (worker_thread) from [<c0130568>] (kthread+0x140/0x148)
[<c0130568>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
Exception stack(0xdf443fb0 to 0xdf443ff8)
3fa0:                                     00000000 00000000 00000000 00000000
3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
3fe0: 00000000 00000000 00000000 00000000 00000013 00000000
---[ end trace 12f57fbcb1fd0ef0 ]---
Andy.

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