@ric96 the TV is a philips 40pfl4707/f7
Sorry Ampster, LED code?
not in europe. Currently in VA. LED codes like…3 fast& 2 slow pulses signify thermal issue… etc. I was wondering if there are LED indicator codes that can be read if you don’t have a display that works. That isn’t a legit light code btw. That was just an example of what I meant.
News? I’m just letting this board collect dust. Lol.
Yes I know it’s Saturday night, but the family are in bed and so I get finally access to the TV in the lounge.
To confrm that the Samsung LG43 610V works fine via striaght HDMI to HDMI (ish - as the build from the 1st August on the 960 causes the display to be slightly off centred. I can’t flash it at the moment as my USB 3 C cable is back in the office at work … sigh.
Plugging it into the little 6" 1080p 60Hz LCD display and nothing is being shown. The LED on the MIPI board flashes 8 or 9 times when there isn’t any data being sent to it, i.e. when the 960 powered off. When the 960 powers up the LED remains off.
There must be an easy answer to this.
So we have a clue what might be going on here.
My monitor discloses the refresh rate of the incoming video. For hikey960 the video mode is reported as 1920x1080@58Hz but for other boards, including the hikey which uses a similar HDMI converter, the video mode is 1920x1080@60Hz. In other words we’re only like to get a display running on a display device that tolerates this refresh rate (I suspect many TVs won’t tolerate that… especially those that are for the US market only).
I’ve also found some suspicious looking code that may be responsible for this… however its sufficiently suspicious that no programmer I know would write it except to workaround something worse. So I’ll run a few experiements but…
… may prove to be optimistic 
Thanks Daniel,
Ahh, it must be my sunny disposition and PMA showing through. Or I am just
niave. My board is a MIPI board so I’ve got a resolution of 1080 x 1920
@60hz. So it looks as though I am well goosed.
Unfortunately, I am not a developer\programmer (Brit spelling) and more of
a general tech, so I don’t think I am unable to help too much in this.
I have been looking at the Sony Experia ZX today. This may be the solution
to me trying to be clever and wanting to use a discrete display and minute
motherboard
With kind regards
Phil
There are more and useful discussions in https://bugs.96boards.org/show_bug.cgi?id=598
HiKey960 has hardware limitations in generating 148M clock rates for 60Hz 1080p pixels. Instead it uses 144M to mimic it.
Having seen Guodong’s update I double checked this. I’m afraid I misread the video mode from my monitor (it puts the current refresh rate side-by-side with the max refresh rate… easy to misread). The original hikey also outputs at 1920x1080@58Hz.
Hi danielt,
ist there a solution meanwhile?
I have the same problem with a samsung TV.
I’m afraid not, I’m not aware of any way to workaround this issue short of switching to an alternative display device.
You can switch to a lower resolution that is supported by the monitor, but for which the hikey is able to generate the correct clock. For instance, 1280x720. You can add a video= parameter to the kernel commandline to achieve this.
@danielt : might it not be a good idea to set a default resolution that is fully HDMI standards compliant?
It is possible the TV might react differently to different frequencies but it is likely still to “mute” the output since the clock for the other modes has a similar percent error.
Hello everyone,
I have two Hikey960 boards and using it with Samsung TV - UN55FH6030CXZA.
One still has the pre-installed version which works with the TV (Out of the box).
For the second board, I successfully built the AOSP and the HDMI doesn’t work.
I also tried Factory image, but it still won’t work.(https://www.96boards.org/documentation/consumer/hikey960/downloads/aosp.md.html)
I verified that the Display and clock rates are included for the TV, but had no luck.
(https://android-review.googlesource.com/c/kernel/hikey-linaro/+/505547/2/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c)
Any help is appreciated.
Have you confirmed that your board is actually booting? How did you install your AOSP build to it?
Yes. The user LED is on.
I tried both ways:
- Setting Pins 1&3 ON - 2 OFF
- adb reboot-bootloader
The led comes on immediately when the kernel begins executing. It does NOT mean that it is booted.
I didn’t ask you how you entered fastboot. I asked you how you installed your build. Exactly what did you type in to make it install?
I used the ./flash-all.sh in the zip file.
Zip file? There shouldn’t be any zip file.
Can you get logs of your boot?
