imx-drm hang issue with etnaviv (GC3000)

[Lucas Stach]

Am Donnerstag, den 27.10.2016, 19:26 +0200 schrieb Wladimir J. van der
Laan:
> Hello,
> 
> After running kmscube (or another KMS executable) on a i.MX6 QuadPlus (etnaviv,
> GC3000) a few times on I get the below crash in the drm kernel driver.
> This is on a device with LVDS panel. It is always reproducible, although the
> number of invocations needed differs.
> 
> The only way to get rendering to work again after the crash is to reboot.
> Repeated tries only get the "flip_done timed out".
> 
> This always happens while the program is exiting.
> 
> Versions:
> 
> - mesa: https://github.com/etnaviv/mesa 9a09984
> 
> - libdrm: https://cgit.freedesktop.org/mesa/drm/ fe4579e
> 
> - Kernel: 4.8.0 or 4.8.4 + Pengutronix patches (20161007).
> 
> Does anyone have an idea what could be the problem?
> 
I think I've seen this problem a few times already. I'll have a look at
this today.

Regards,
Lucas

> Regards,
> Wladimir van der Laan
> 
> [  130.026973] ------------[ cut here ]------------
> [  130.031630] WARNING: CPU: 1 PID: 222 at drivers/gpu/drm/drm_atomic_helper.c:1127 drm_atomic_helper_wait_for_vblanks+0x1e4/0x200
> [  130.043149] [CRTC:24] vblank wait timed out
> [  130.047367] Modules linked in: hid_generic usbhid hid ci_hdrc_imx ci_hdrc extcon_core ehci_hcd usbcore usb_common usbmisc_imx coda videobuf2_vmalloc
> [  130.060915] CPU: 1 PID: 222 Comm: kmscube Not tainted 4.8.4+ #1
> [  130.066844] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [  130.073378] Backtrace: 
> [  130.075863] [<8010b6c0>] (dump_backtrace) from [<8010b908>] (show_stack+0x20/0x24)
> [  130.083439]  r7:80b441d8 r6:600c0013 r5:00000000 r4:80b441d8
> [  130.089187] [<8010b8e8>] (show_stack) from [<803a33fc>] (dump_stack+0x78/0x94)
> [  130.096422] [<803a3384>] (dump_stack) from [<8011a9b8>] (__warn+0xdc/0x110)
> [  130.103389]  r7:00000009 r6:8042fda4 r5:00000000 r4:ed47fd08
> [  130.109132] [<8011a8dc>] (__warn) from [<8011aa34>] (warn_slowpath_fmt+0x48/0x50)
> [  130.116620]  r9:00000000 r8:ee1b9418 r7:edc76600 r6:00000000 r5:edffc500 r4:00000000
> [  130.124470] [<8011a9f0>] (warn_slowpath_fmt) from [<8042fda4>] (drm_atomic_helper_wait_for_vblanks+0x1e4/0x200)
> [  130.134563]  r3:00000018 r2:80898166
> [  130.138194] [<8042fbc0>] (drm_atomic_helper_wait_for_vblanks) from [<80457fc8>] (imx_drm_atomic_commit_tail+0x58/0x68)
> [  130.148895]  r10:8086686b r9:ee1b923c r8:0000003f r7:80b6bf22 r6:00000000 r5:ee1b9000
> [  130.156823]  r4:edffc500
> [  130.159390] [<80457f70>] (imx_drm_atomic_commit_tail) from [<804323e8>] (commit_tail+0x4c/0x68)
> [  130.168094]  r5:80b4a014 r4:edffc500
> [  130.171719] [<8043239c>] (commit_tail) from [<8043249c>] (drm_atomic_helper_commit+0x98/0xb0)
> [  130.180249]  r5:00000000 r4:edffc500
> [  130.183875] [<80432404>] (drm_atomic_helper_commit) from [<8045810c>] (imx_drm_atomic_commit+0x134/0x144)
> [  130.193447]  r7:80b6bf22 r6:edffc800 r5:edffc500 r4:00000006
> [  130.199191] [<80457fd8>] (imx_drm_atomic_commit) from [<804556d0>] (drm_atomic_commit+0x60/0x70)
> [  130.207981]  r10:00000004 r9:ee1b923c r8:0000003f r7:ee1b9000 r6:edffc500 r5:ee1b9000
> [  130.215908]  r4:edffc500
> [  130.218475] [<80455670>] (drm_atomic_commit) from [<80435660>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x130/0x29c)
> [  130.229175]  r5:eeba9f00 r4:00000000
> [  130.232799] [<80435530>] (drm_fb_helper_restore_fbdev_mode_unlocked) from [<80436904>] (drm_fbdev_cma_restore_mode+0x20/0x24)
> [  130.244107]  r10:400c0013 r9:ede68f88 r8:ee2053c0 r7:ee1b911c r6:ede68f7c r5:80bc5648
> [  130.252033]  r4:ee1b9000
> [  130.254598] [<804368e4>] (drm_fbdev_cma_restore_mode) from [<804581e8>] (imx_drm_driver_lastclose+0x20/0x24)
> [  130.264439] [<804581c8>] (imx_drm_driver_lastclose) from [<8043a5b0>] (drm_lastclose+0x4c/0xfc)
> [  130.273149] [<8043a564>] (drm_lastclose) from [<8043a938>] (drm_release+0x2d8/0x324)
> [  130.280898]  r7:ee1b911c r6:ede68f7c r5:ede68f00 r4:ee1b9000
> [  130.286642] [<8043a660>] (drm_release) from [<801fa8a8>] (__fput+0xe8/0x1bc)
> [  130.293696]  r10:ede069c8 r9:00000008 r8:ee21b190 r7:ee428ee0 r6:00000000 r5:ee197bc0
> [  130.301622]  r4:ede069c0
> [  130.304183] [<801fa7c0>] (__fput) from [<801fa9ec>] (____fput+0x18/0x1c)
> [  130.310890]  r10:00000000 r9:00000000 r8:80107ac4 r7:ed47ff58 r6:edf36a80 r5:80b70eb8
> [  130.318817]  r4:ee0bf800
> [  130.321381] [<801fa9d4>] (____fput) from [<80134e6c>] (task_work_run+0xc8/0xdc)
> [  130.328704] [<80134da4>] (task_work_run) from [<8011caec>] (do_exit+0x438/0x960)
> [  130.336105]  r7:ed47ff58 r6:ee0bfc08 r5:eeb88a80 r4:ee0bf800
> [  130.341847] [<8011c6b4>] (do_exit) from [<8011e188>] (do_group_exit+0x5c/0xcc)
> [  130.349075]  r7:ffffe000
> [  130.351638] [<8011e12c>] (do_group_exit) from [<8011e218>] (__wake_up_parent+0x0/0x30)
> [  130.359560]  r7:000000f8 r6:76ec6750 r5:00000001 r4:00000001
> [  130.365305] [<8011e1f8>] (SyS_exit_group) from [<80107900>] (ret_fast_syscall+0x0/0x3c)
> [  130.373357] ---[ end trace 5678aedcbb762e5c ]---
> [  140.667136] [drm:drm_atomic_helper_commit_cleanup_done] *ERROR* [CRTC:24:crtc-0] flip_done timed out
> [  150.907117] [drm:drm_atomic_helper_commit_cleanup_done] *ERROR* [CRTC:24:crtc-0] flip_done timed out
> [  161.147143] [drm:drm_atomic_helper_commit_cleanup_done] *ERROR* [CRTC:24:crtc-0] flip_done timed out
>