[coreboot] Re: Trying to debug T440p's display problem, compared it with T420.

Hi Dalao, On 16.03.20 13:05, Dalao wrote: >> this combination is flawed. It will run the VGA BIOS twice, once in coreboot >> and once in SeaBIOS. Generally, this only works by chance. > > Oh thank you! I have changed to none now. BTW, could the source set it to > none automatically if add the

[coreboot] Re: libgfxinit quick starter guide

Hi, On 16.03.20 13:01, Michal Zygowski wrote: > Regarding the registers description, maybe EDS or other documents have > better situation? I have Braswell EDS so i can check it, but if you have > any documents that describe display registers for Braswell, let me know > which ID it is so I can get

[coreboot] Re: teensy_debugdev: Can we make this USB EHCI debug jig work?

Hi Keith! Did I miss something? How can we make this work? It won't work, since the ATMega32u4 only supports 1.5 and 12 MBit/s USB, but an EHCI debug dongle needs to support 480 MBit/s mode or it won't work. That's also why the ft(2)232h works as a slightly out-of-spec EHCI debug device

[coreboot] teensy_debugdev: Can we make this USB EHCI debug jig work?

Hi guys, Now is the time to get some coreboot work done. I found out about this code during a search: https://github.com/avivgr/teensy_debugdev It is to be programmed into an ATMega32u4 device that turns it into a USB debug dongle and picks up serial chatter to be sent out via the serial pins