https://bugzilla.kernel.org/show_bug.cgi?id=201539
--- Comment #3 from Jan Ziak (http://atom-symbol.net) (0xe2.0x9a.0x9b@gmail.com) --- 4.18.16: $ cat /sys/class/drm/card0/device/hwmon/hwmon2/pwm1_enable 2
4.19.0: $ cat /sys/class/drm/card0/device/hwmon/hwmon2/pwm1_enable 1