"WARNING: CPU: 2 PID: 49 at drivers/gpu/drm/drm_dp_helper.c:1953 drm_dp_aux_register+0x104/0x110" on mt8173
@frankbinns gives me a new defconfig #2 (comment 1346807), and it can light up the Chromebook's screen now, but I got a warning trace from dmesg:
WARNING: CPU: 2 PID: 49 at drivers/gpu/drm/drm_dp_helper.c:1953 drm_dp_aux_register+0x104/0x110
Modules linked in:
CPU: 2 PID: 49 Comm: kworker/u8:1 Not tainted 5.16.0-rc5-g62ea39cc324d #14
Hardware name: Google Elm (DT)
Workqueue: events_unbound deferred_probe_work_func
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : drm_dp_aux_register+0x104/0x110
lr : ps8640_bridge_attach+0xcc/0x180
sp : ffff8000113eb8f0
x29: ffff8000113eb8f0 x28: 0000000000000000 x27: ffff0000c0e60b00
x26: 0000000000000000 x25: ffff0000c0e60b00 x24: 0000000000000001
x23: ffff0000c0de24a8 x22: 0000000000000001 x21: 0000000000000000
x20: ffff0000c0de0420 x19: ffff0000c0fb9178 x18: 0000000000000000
x17: 6b746d2073706f28 x16: 20616d6d61672e30 x15: 0000000000000000
x14: 0000000000000001 x13: 0000000000000002 x12: 0000000000000028
x11: 000000000000000b x10: ffff8000ee9e7000 x9 : 0000000000000000
x8 : ffff0000c0ec6e80 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : ffff0000c0de0620 x3 : ffff0000c0ec6f00
x2 : 0000000000000000 x1 : ffff0000c0abf000 x0 : 0000000000000000
Call trace:
drm_dp_aux_register+0x104/0x110
ps8640_bridge_attach+0xcc/0x180
drm_bridge_attach+0x80/0x1b0
mtk_dsi_bridge_attach+0x24/0x30
drm_bridge_attach+0x80/0x1b0
mtk_dsi_bind+0x60/0x130
component_bind_all+0x100/0x25c
mtk_drm_bind+0xf0/0x27c
try_to_bring_up_master+0x164/0x1d0
__component_add+0xa0/0x170
component_add+0x14/0x20
mtk_dsi_probe+0x1f0/0x33c
platform_probe+0x68/0xe0
really_probe.part.0+0x9c/0x30c
__driver_probe_device+0x98/0x144
driver_probe_device+0xc8/0x15c
__device_attach_driver+0xb4/0x120
bus_for_each_drv+0x78/0xd0
__device_attach+0xdc/0x184
device_initial_probe+0x14/0x20
bus_probe_device+0x9c/0xa4
deferred_probe_work_func+0x88/0xc0
process_one_work+0x1d0/0x354
worker_thread+0x2c0/0x470
usb 1-1: new high-speed USB device number 2 using xhci-mtk
kthread+0x178/0x184
ret_from_fork+0x10/0x20
---[ end trace 7a701078c68dea80 ]---
Here is the full dmesg log:works_
Edited by Chen Li