I'm trying to get a 4K 5.5" LCD to work (only console mode needed ) .
U-boot can get it on at the desired resolution : 2160x3840 ( yes it's a portrait mode ) and display correctly .
Seems that U-boot is reporting the correct information to set up simpleFB , but I don't get any display after kernel loading .
The display adapter (HDMI>MIPI) have 3 options ( switching between 3 different EDID ) , the 2 others are working correctly ( 1080x1920 , 1440x2560 ) .
I 'm wondering if this is related to simpleFB limitation , or memory allocation ... problem is that I'm a complete noob ...
I can provide any information needed as long as you tell me what is needed .
Update :
Problem solved by editing z-0003-add-additional-video-modes, and compiling a full distribution .
as I'm complete noob, I didn't do it the clean way . if some of you are interested I can give all information to add this custom mode .
Not sure on how to do it on newer kernel (I'm on 3.4.113-sun8i )as some modification like video_pll and hdmi_cts_compatibility need to be edited.
I'm trying to get a 4K 5.5" LCD to work (only console mode needed ) . U-boot can get it on at the desired resolution : 2160x3840 ( yes it's a portrait mode ) and display correctly . Seems that U-boot is reporting the correct information to set up simpleFB , but I don't get any display after kernel loading . The display adapter (HDMI>MIPI) have 3 options ( switching between 3 different EDID ) , the 2 others are working correctly ( 1080x1920 , 1440x2560 ) . I 'm wondering if this is related to simpleFB limitation , or memory allocation ... problem is that I'm a complete noob ... I can provide any information needed as long as you tell me what is needed . Update : Problem solved by editing z-0003-add-additional-video-modes, and compiling a full distribution . as I'm complete noob, I didn't do it the clean way . if some of you are interested I can give all information to add this custom mode . Not sure on how to do it on newer kernel (I'm on 3.4.113-sun8i )as some modification like video_pll and hdmi_cts_compatibility need to be edited.