* H. Nikolaus Schaller hns@goldelico.com [190117 11:07]:
Hi Tony,
Am 16.01.2019 um 22:19 schrieb H. Nikolaus Schaller hns@goldelico.com:
Hi, I did some initial booting of the latest Letux kernel. We again have no display but this time the backlight PWM is missing. Only the keyboard backlight PWM works. There are no reports from omapdrm about panel failures and X11 is starting.
Secondly, Tony has suggested a fix for some interrupt issue.
Applying his patch plus two more where I think he was referring to [1] makes the interrupt reports during initial boot go away. So I'll take this for 5.0-rc3.
There will be a new single report from pcal6524 that nobody cares about some interrupt. This is likely be the ts3a227 headset detection interrupt which was never working properly before.
And maybe have a look into the backlight issue.
First result on changes for this:
There has been a significant rework of the omap5.dtsi.
THis has changed the DTB definitions of timers1..4 and 9..12 to use ti,sysc-omap4-timer while timer5..8 are still ti,omap5430-timer.
Yes the ABE changes still need a bit more work for mcpdm clock.
This seems to break dmtimer/pwm mode for timer9 which we use for driving display backlight while timer8 for keyboard backlight still works.
Oops sorry about that.
Is there an upcoming patch not yet merged in 5.0-rc2 or what makes the difference in 5.0 between timer8 and timer9?
I need to look. Sounds like there might be some optional clock missing in the dts. I'll take a look.
PS: the symptom is that we don't even see a /sys/class/backlight node for the display backlight [2].
OK
Regards,
Tony