14:30 <phh> i have troubles getting my pwm0/backlight to work. Reading 0xff680000, I can see pwm is ticking, i've set 0xff680008 to half of 0xff680004, 0xff77006c is set to 0x14001, and nothing happen. If I control the pwm0 pin through gpio (0xff77006c set to 0x14000), the backlight does light. (fwiw, before tinkering with hardware registers, I tried with pwm-backlight module on 4.8.2 and the same happen)

14:30 <phh> would someone haave some idea about that?

14:58 <ayaka> it seems that I meet the same problem

14:58 <ayaka> but without the oscillograph I can't make sure

15:11 <phh> ok thanks. I think I'll try on chromebook, they seem to be using that pwm as well

15:41 <paulk-minnie> ayaka, I have an issue with backlight PWM too

15:41 <ayaka> then I am not lonely, I though it is my problem what I can't enable my eDP panel

15:42 <wens> hmm, i got my c201 working with 4.9-rc1

15:44 <paulk-minnie> wens, getting emmc issues at all?

15:45 <wens> paulk-minnie: not using emmc for now

15:45 <paulk-minnie> ok

15:46 <wens> i think the controller doesn't like my sd card though

15:46 <wens> heavy trim ops seem to make it time out

15:47 <phh> wens: backlight diming works?

15:50 <wens> let me see

15:51 <paulk-minnie> here backlight works fine on speed and minnie but it flickers after some time of use

15:52 <paulk-minnie> so I suspect that the PWM frequency isn't well locked and shifts after some time

15:52 <paulk-minnie> which doesn't appen with the cros kernel

15:53 <wens> phh: yes it does

15:53 <phh> ok thanks

15:54 <wens> paulk-minnie: unstable source clock?

15:54 <paulk-minnie> wens, seems so