---> U-Boot has CONFIG_I2C_EDID to build a module to parse EDID information.
This is not enabled by khadas-edge-v-rk3399_defconfig. I would assume this is part of the problem.
scripts/get_maintainer.pl configs/khadas-edge-v-rk3399_defconfig and scripts/get_maintainer.pl common/edid
Hello. Since u-boot should be installed on FreeBSD,can you point me where I can get the khadas-edge-v-rk3399_defconfig file and the u-boot code that should be recompiled ?
On Tue, Aug 19, 2025 at 6:23 PM Heinrich Schuchardt xypron.glpk@gmx.de wrote:
On 19.08.25 17:54, Mario Marietto wrote:
Hello.
I've installed FreeBSD 14.2-RELEASE on both my boards (RockPro64 and
Khadas
Edge V),both based on the Rockchip RK3399 and I've used a display that
has
a resolution of 720 x 720 resolution and I saw that the screen remains almost black (almost because I see a dim illumination coming from the display) .
I don't even see the u-boot logo. Instead,it is able to turn on my large HDMI monitor,which has a resolution of 1920x1080 pixels.
Since I'm building a FreeBSD modular phone, I want to use a small HDMI display with a low resolution. My question is : why is u-boot able to
turn
on a monitor that has a resolution of 1920x1080 and it's not able to turn on the other HDMI display that has a resolution of 720x720 ?
Or even better : what's the lowest resolution that will work ?
If I want to buy a display that has a resolution of 800x600,will u-boot
be
able to turn it on ? 1024x768 ? more ?
Thanks.
Hello Mario,
The way operating systems detect monitor resolution is by reading the EDID information via the I2C lines of the HDMI connector.
U-Boot has CONFIG_I2C_EDID to build a module to parse EDID information. This is not enabled by khadas-edge-v-rk3399_defconfig. I would assume this is part of the problem.
scripts/get_maintainer.pl configs/khadas-edge-v-rk3399_defconfig and scripts/get_maintainer.pl common/edid will provide the people and the U-Boot list that you could contact for support.
There is also a #u-boot IRC channel at irc.libera.chat.
Best regards
Heinrich