eDP not work

peksuj

Hi,

I get now uboot from android git, kernel from FireflyTeam git and using original Linux rootfs image. I see in boot debug and Linux that everything should work, but nothing in eDP display. I check signals from eDP connector and AUX was giving 760mV peak-to-peak signal, TX1, TX2 and TX3 give also 1070mV peak-to-peak, but TX0 doesn't give any signal...

What can be problem?

Pekka

peksuj

So Android uboot is not compitable?

peksuj

Hi,

I test today AIO-3399J board with Android and LVDS, it is work. But I also try eDP with no success. I think that TX0 port is broken. There is no signal at all...

Pekka

peksuj

Hi,

I try use Android rk3399-firefly-aio-edp.dts. I get backlight on and Android find display but can't get nothing to display. I change compatible to "simple-panel". Do I need to set any other parameters to kernel files? Timing?

Product ID code: 35ed
Manufacturer: AUO
Serial number: 00000000
Manufactured in week: 0 year: 2013
Video input definition: digital signal, voltage level 0, blank to black, composite sync, serration v
Monitor is non-RGB
Maximum visible display size: 34 cm x 19 cm
Power management features: no active off, no suspend, no standby
Estabilished timings:
Standard timings:
        1920x1080       60 Hz (detailed)
        1920x1080       40 Hz (detailed)
Detailed mode clock 142000 kHz, flags[a]
    H: 1920 2028 2076 2100
    V: 1080 1090 1100 1126
bus_format: 1009
rk lcdc - 0 dclk set: dclk = 142000000HZ, pll select = 1, div = 1
CR Max reached (0,3,0)
LT CR failed!
eDP link training failed (-5)
Link Training Clock Recovery success
EQ Max loop
LT EQ failed!
eDP link training failed (-5)
Link Training Clock Recovery success


Thanks,
Pekka

gjames@smu.ca

I also try to get 2 displays active as stated supported on website.
error cannot find crtc for output HDMI-1.

False advertising!

gjames@smu.ca

I also try to get 2 displays active as stated supported on website.
error cannot find crtc for output HDMI-1.

crash8319

Has anyone been able to get eDP working on AIO-3399J? I am using Android 7.1 I have spent 30+ hours trying to make it work. I know my pinout is correct. I have tried different cables, the display has been tested and is good. I am using AUO B156XTK01.0 But, the only thing I see is "AUX CH command reply failed!" every time.

I followed the directions very carefully for configuring the kernel and u-boot and tried many different things, but nothing changes. I am familiar with AOSP so I am very careful and thorough when editing the software.

I know the display panel is being powered correctly as well because I am able to use the self-test pin and make the display cycle through the color test.

Any ideas?

Thanks in advance!

crash8319

So, yesterday evening I tried something interesting. I cut a DisplayPort cable in half and soldered the wires to a connector and then hooked up the AIO-3399J to a PC monitor via the eDP port. It correctly recognized the display and I saw some output. It was a little glitchy at first, (due to my awful soldering skills). But, I was able to position the wires carefully by hand until it worked flawlessly.

I am thinking about making an adapter board to go from the eDP pins to a DisplayPort connector. Would anyone be interested in this?

Next step is getting it working on my actual eDP display. I think my issue was the cables. I made them by hand, it seems that it should have at least been able to communicate via AUX. I'll keep messing with it and provide feedback.