I found my issue about panel not working in DRM mode! i didn't realize one need to *enable two more kernel options: "SIMPLE PANEL" (and BACKLIGHT ..)*.
after that, i've got the LCD panel working in DRM mode; moreover, adding the HDMI cfg on DTS, i've got also the dual head setup with both panel and HDMI. thanx to all the people involved for such an achievement! in this latest setup, i found a different behaviour when rendering to screen in these two different scenarios: * using* /dev/fb0* i just got my Qt app rendering the 800x480 window mirrored, full screen on the LCD and in a quarter top left in the FullHD HDMI monitor. * testing *kmstest* i've got two test cards with the same number of color bars on both screens (LCD and HDMI), each one with native resolution and where the diagonals are crossing the bars in different points, so they are NOT the same image but two differents. i'm wondering if one can configure DTS to get *two different /dev/fbX *in "emulated framebuffer" or has to modify app to use the full DRM/KMS capability for the dual-head setup. Il giorno mercoledì 20 dicembre 2017 13:01:14 UTC+1, Andrea Venturi ha scritto: > > hello, > > i've just checked sunxi-next git kernel tree and i didn't found any DTS > for sun7i A20 tablets with LCD+HDMI support.. does anyone knows if there > are samples on other trees? > > bye > > andrea > > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
