19 Mar
2019
19 Mar
'19
3:18 p.m.
Am 18.03.2019 um 21:04 schrieb H. Nikolaus Schaller hns@goldelico.com:
- BBB+LCDC: display ok, backlight is always on (but does not respond to "xset dpms")
This seems to have a threefold reason: 1. there is no DT node for connecting the backlight to the panel driver 2. the CONFIG_PWM_TIEHRPWM driver is not configured 3. after proerly configuring, pwmss_probe() or ehrpwm_pwm_probe() is never called... and the pwm_bl finally fails with EPROBE_DEFER and no /sys/class/backlight is registered.
The result is that the PWM driver does not run and therefore no backlight pwm driver.
I now wonder if it ever did work... Probably not...
BR, Nikolaus