[Bug 96571] [CHV] Backlight init fails on Surface 3 if module load order is wrong

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96571

--- Comment #62 from youling257 <youling257 at gmail.com> ---
Linux 5.2,bdi 7:4: hash matches

[    1.957833] i2c_designware 80860F41:04: I2C bus managed by PUNIT
[    1.970286] mmcblk2: mmc2:59b4 NCard 29.5 GiB 
[    1.983065]  mmcblk2: p1 p2 p3 p4
[    1.984464] PM:   Magic number: 7:374:39
[    1.989857] bdi 7:4: hash matches
[   10.903210] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   10.903222] [drm] Driver supports precise vblank timestamp query.
[   10.904576] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[   10.928967] [drm] Initialized i915 1.6.0 20190417 for 0000:00:02.0 on minor
0

Linux 5.3,pwm pwmchip0: hash matches

[    1.944169] i2c_designware 80860F41:04: I2C bus managed by PUNIT
[    1.961837] PM:   Magic number: 11:414:692
[    1.965361] pwm pwmchip0: hash matches
[   11.268783] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   11.268836] [drm] Driver supports precise vblank timestamp query.
[   11.270231] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[   11.270769] [drm:pwm_setup_backlight [i915]] *ERROR* Failed to own the pwm
chip
[   11.287482] [drm] Initialized i915 1.6.0 20190619 for 0000:00:02.0 on minor
0

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