Hello all, just new to here, I bought an Orangepi PC board and grabbed lastest Armbian pre-built image with legacy kernel.
I test my code that dynamically change the HDMI output resolution, by something like this:
ioctl(disp, DISP_BLANK, true)
ioctl(disp, DISP_DEVICE_SWITCH)
ioctl(disp, DISP_BLANK, false)
and then update fbvar by ioctl(fb0, FBIOPUT_VSCREENINFO)
I can see output actually changed, everything goes well until I try to map framebuffer from /dev/fb0, it failed with errno EINVAL.
After check drivers source code I think it's because the display driver, it forget to notify the system to update framebuffer parameters, but I can't figure out the actual problem of the code.
If I use h3disp, after reboot I can map framebuffer as well, but I need to change it dynamically. Does anyone have a solution for this? Thank you very much!
