Problem with C4 on Ultrastretch 3840×1080

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getty23
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Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Hello,

I have a bit of trouble getting the Odroid C4 running on a LG Ultrastretch (https://www.lg.com/global/business/digi ... /lg-88bh7g) with 3840×1080 resolution.

I used this version of Odroid: https://wiki.odroid.com/odroid-c4/os_im ... 4_20210715
It worked very well with my normal 4K display.

The problem I am having is that the Odroid just outputs to the ultrastretch display in HD 1080p.
I tried it with a custombuild and edited the env.ini accordingly (compare viewtopic.php?t=30538 and https://wiki.odroid.com/odroid-c2/appli ... utosetting). Afterwards I got the following image just covering half of the screen:

Image

After a few seconds it switched to full width but got stretched again (looked like 1080p again):

Image

I also observed that CEC was disabled and I was not able to change anything here:

Image

It would be great if you could give me some hints how I get this running ;).

Thanks a lot and best regards,
Flo

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Does someone has a hint for me how to get this running?

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by odroid »

Try Ubuntu 20.04 + Kernel 4.9 image first with proper modeline configuration.
https://wiki.odroid.com/odroid-c4/os_im ... e/20210128

If it works fine, we will try merging the modeline configuration into Android HDMI driver.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks for the hint. I tried the Ubuntu Mate version (https://wiki.odroid.com/odroid-c4/os_im ... e/20210128).
Initially I had the same stretched image but once I adjussed the config with my modeline configuration I got a proper resolution of 3840x1080:
modeline="3840,1080,221000,55250,50,3840,3888,3920,4000,1080,1083,1093,1106,1,1,1

Compare image:
Image

What would be the next steps to get it running for Android as well? For our project it would be very good to have a working version by this week.
Can I support you somehow?

Thanks

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

Android display composer(surface flinger) has a limitation up to 2560x1080 resolution. Therefore, we have to resize and scale fb as 32:9 aspect ratio.
The rendering surface area must be resized to 1920x540 for your monitor even the HDMI PHY is running at 3840x1080.
If you want to try that 1920x540 resolution, I will make a trial OS image.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks for your reply. Isn't there a way to get this running in full resolution.
Before Odroid we were using emteria (https://emteria.com/) and they were able to show this resolution with Android (different Android?). But with them we had the issue that 4K videos were not running.
Do we have any option to get this running in full resolution?
Thanks

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

I'd expect thar going down with the rendering surface to 1920x540 resolution, would not allow me to play 4K videos, right?

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by odroid »

I believe the video rendering layer will be 3840x1080 while the Android GUI surface layer is 1920x540.
The GUI layer will be upscaled and mixed with the video layer to 3840x1080 HDMI PHY resolution.
@codewalker is building a trial image and you can test it soon.

Our current Android OS image works in a very similar way.
3840x2160 video layer + 1920x1080 GUI layer ==> 4K(3840x2160) HDMI PHY.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »


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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks...I tried the new image but this was also not working.

But when I was changing the modeline to the following, it was working:

Code: Select all

hdmimode="custombuilt"

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Custom modeline
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; hdmimode="custombuilt"
; 2560x1440p60hz sample
modeline="1920,540,148500,67500,60,1920,2008,2052,2200,540,542,544,562,1,1,1"
customwidth="1920"
customheight="540"
Now the Android display is not of high resolution but the videos which we are playing from our app show in 4K. So this is working fine.

Though these modeline values were not officially returned from the display via xrandr but the numbers more of a guess by myself.
Somehow Android does not recognize the display.
As mentioned before the Emteria Android OS was recognizing it automatically and it i running Android 11. Maybe this hint helps.

Anymore hints how to follow this up and have a clean version where I do not need to set the modeline manually?

Thanks for your great support

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by odroid »

It is not an Android OS version issue.
Currently, we've supported the following resolutions only.

Code: Select all

;+--------------------+----------------------------------+
;| Symbol             | Resolution                       |
;+--------------------+----------------------------------+
;| "480x320p60hz"     | 480x320 Progressive 60Hz         |
;| "480p60hz"         | 720x480 Progressive 60Hz         |
;| "576p50hz"         | 720x576 Progressive 50Hz         |
;| "720p60hz"         | 1280x720 Progressive 60Hz        |
;| "720p50hz"         | 1280x720 Progressive 50Hz        |
;| "1080p60hz"        | 1920x1080 Progressive 60Hz       |
;| "1080p50hz"        | 1920x1080 Progressive 50Hz       |
;| "1080p30hz"        | 1920x1080 Progressive 30Hz       |
;| "1080p24hz"        | 1920x1080 Progressive 24Hz       |
;| "1080i60hz"        | 1920x1080 Interlaced 60Hz        |
;| "1080i50hz"        | 1920x1080 Interlaced 50Hz        |
;| "2160p60hz"        | 3840x2160 Progressive 60Hz       |
;| "2160p50hz"        | 3840x2160 Progressive 50Hz       |
;| "2160p30hz"        | 3840x2160 Progressive 30Hz       |
;| "2160p25hz"        | 3840x2160 Progressive 25Hz       |
;| "2160p24hz"        | 3840x2160 Progressive 24Hz       |
;| "smpte24hz"        | 3840x2160 Progressive 24Hz SMPTE |
;| "640x480p60hz"     | 640x480 Progressive 60Hz         |
;| "800x480p60hz"     | 800x480 Progressive 60Hz         |
;| "800x600p60hz"     | 800x600 Progressive 60Hz         |
;| "1024x600p60hz"    | 1024x600 Progressive 60Hz        |
;| "1024x768p60hz"    | 1024x768 Progressive 60Hz        |
;| "1280x800p60hz"    | 1280x800 Progressive 60Hz        |
;| "1280x1024p60hz"   | 1280x1024 Progressive 60Hz       |
;| "1360x768p60hz"    | 1360x768 Progressive 60Hz        |
;| "1440x900p60hz"    | 1440x900 Progressive 60Hz        |
;| "1600x900p60hz"    | 1600x900 Progressive 60Hz        |
;| "1600x1200p60hz"   | 1600x1200 Progressive 60Hz       |
;| "1680x1050p60hz"   | 1680x1050 Progressive 60Hz       |
;| "1920x1200p60hz"   | 1920x1200 Progressive 60Hz       |
;| "2560x1080p60hz"   | 2560x1080 Progressive 60Hz       |
;| "2560x1440p60hz"   | 2560x1440 Progressive 60Hz       |
;| "2560x1600p60hz"   | 2560x1600 Progressive 60Hz       |
;| "3440x1440p60hz"   | 3440x1440 Progressive 60Hz       |
;+--------------------+----------------------------------+
We can add your display resolution into the list for auto-detection feature once you provide an EDID file.
Run this command to capture your monitor raw information on Ubuntu OS and post a reply with the EDID file.
cat /sys/class/amhdmitx/amhdmitx0/rawedid > /media/boot/3840x1080-edid.bin

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

If you edit modeline like this, HDMI Phy will be 3840x1080p60hz and Android UI (Framebuffer) will be 1920x540 with test firmware.

modeline="3840,1080,221000,55250,50,3840,3888,3920,4000,1080,1083,1093,1106,1,1,1
customwidth="3840"
customheight="1080"

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

I've uploaded another test firmware.

https://dn.odroid.com/S905X3/ODROID-C4/ ... dc4.img.xz

HDMI PHY is 3840x1080p50hz and UI framebuffer is 1920x540 automatically.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks for your quick support.

I tested the new image but still I get the stretched 1920x1080 resolution by default.
Even if I use your provided modeline it is not picking up.

Just with this modeline it is working

Code: Select all

hdmimode="custombuilt"

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Custom modeline
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; hdmimode="custombuilt"
; 2560x1440p60hz sample
modeline="1920,540,148500,67500,60,1920,2008,2052,2200,540,542,544,562,1,1,1"
customwidth="1920"
customheight="540"
I've provided you the edid file here: https://we.tl/t-rJ7b6Ij3T4

Thanks for your support. I am sure we get this running smoothly ;)

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by odroid »

Thank you for the EDID file.
We will look into the auto detection issue again in the next week since here Korea is already Friday evening.
Have a nice weekend.

Edit.
BTW, what happens if you manually edit configuration file like this?

Code: Select all

modeline="3840,1080,221000,55250,50,3840,3888,3920,4000,1080,1083,1093,1106,1,1,1
customwidth="3840"
customheight="1080"

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

Do you show me the full u-boot and kernel log?

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

I've uploaded the test version that fixed some reg values.

https://dn.odroid.com/S905X3/ODROID-C4/ ... dc4.img.xz

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Sorry for the late feedback. Thanks a lot for the new version. I am no vacations until 23.8.
I'll test it once I am back.

We plan to use the N2+ model in the future. Will we expect the same issue over there?

Thanks a lot

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by odroid »

N2+ Android also doesn't support 3840x1080 out of the box at this moment.
Once you confirm the latest C4 trial image, we will push the patch into the next N2/C4 Android updates.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

If you want to test it on N2+, I will make a test version today.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks...would be great if you could prepare me a test version for the N2+
I'll be back in 1.5 weeks for further testing. Sorry, I am on holidays ;)
Thanks

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »


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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Sorry for getting back so late, I was on vacations.
So I tested the N2 version but it is still not working. Seems that it is not picking it up automatically.
If I set it manually, it is working.
Any more hints?

Thanks a lot

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

I need the kernel log.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Hello everyone,
after a longer break we are back at this problem. Sorry for not getting back earlier. Today we did a lot of tests but it is still not working (same problems as before). Somehow the resolution is not scaling up to 4k if videos are running.
We are also not able to download the images you provided.
Could you provide us an image for the n2 to test and give a hint which modline we should use? That would be fantastic.
Thanks a lot and best regards

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

Do you try to install lasted android image?
I've included some patches for 3840x1080p50hz for latest version.

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Do you mean this one: https://wiki.odroid.com/odroid-n2/os_im ... 4_20210930

Which modline should I use to get it running because it was not working out-of-the-box with this image.

Thanks

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Made another test with the latest image (compare post before) and the modline:

Code: Select all

modeline="3840,1080,221000,55250,50,3840,3888,3920,4000,1080,1083,1093,1106,1,1,1"
customwidth="3840"
customheight="1080"
But it did not work. Let me post you the sequence of the startup:

1. For the hardkernel logo everything looks great. Also the TV shows the correct resolution and frequency.
Image

2. Once the android logo is showing, it is shrinking too half the width
Image
Image

3. After a few seeconds it is stretched to the full width. But the sizes do not fit anymore (I think he uses 1920x1080 but the height is just 540 for this screen)
Image

Do you have an idea what the issue could be here?
Thanks

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

Try to edit /odm/env.ini

hdmimode="3840x1080p50hz"

display_autodetect="false"

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks...I tried it but just the hardkernel logo was shown. Afterwards, nothing is shown (no signal).
Any more hints?

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

Do you share your full kernel logo?
And Show me the results for this command.

Code: Select all

$ adb shell
# wm size
# fbset

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Sure...what's the best way to retrieve the kernel logs? Thanks

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Hello,

here is the result of the commands:

Code: Select all

odroidn2:/ # wm size
Physical size: 1920x1080
odroidn2:/ # fbset

mode "3840x1080-0"
	# D: 0.000 MHz, H: 0.000 kHz, V: 0.000 Hz
	geometry 3840 1080 3840 2160 32
	timings 0 0 0 0 0 0 0
	accel false
	rgba 8/16,8/8,8/0,0/24
endmode
And I attached the complete system log which I got from connecting via adb
https://easyupload.io/0tdlmx

If you need more information, let me know.

Thanks for your support

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

We need the kernel log.
Try to this command.

Code: Select all

$ adb shell
# dmesg

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks.
Here is the kernel log https://file.io/fAQ87r8OryES

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

It was deleted :-(

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Could you try this one, please: https://ufile.io/u91lkek6

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

Show your env.ini and boot.ini.
Do you try to set display_autodetect="true" ?

I need the kernel log used display_autodetect="true".

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks. No autoconnect was on false.

I did it with true and saw a different image:
Image

But the app is not scaling up for a video playing in the format:
Image



Here are the files:
- Kernel https://ufile.io/puh0oj26
- boot.ini https://ufile.io/lhwebr3f
- env.ini https://ufile.io/9is6neqb

Thanks a lot

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

If you set autodetect as true. the hdmimode is probably 3840x1080px0hz.
But your result is 1080p60hz.
[ 0.000000] fb: osd0
[ 0.000000] fb: loaded
[ 0.000000] fb: 0x3d800000
[ 0.000000] vout: get cvbsmode: 576cvbs
[ 0.000000] vout: get hdmimode: 1080p60hz
[ 0.000000] hdmitx: voutmode : 1

I need the u-boot log too. Do you have a USB-UART debug kit?

I recommand you try to install lasted image (selfinstall-odroidn2-144-64bit-20210930.img.xz) clearly step by step.

1. Install lastest image without edting anything.

2. If monitor display no signal, edit like this.
hdmimode="3840x1080p50hz"
display_autodetect="false"

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Thanks...I tried both things:
1. Operating system was starting up but looks like in my previous post
2. It is not starting up and I get no signal

Is the mode 3840x1080p50hz really available?

Can you provide a guideline (or link) how to get the u-boot logs?

Thanks a lot and best regards

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by getty23 »

Hello,
any updates here?
Best regards

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Re: Problem with C4 on Ultrastretch 3840×1080

Post by codewalker »

You need the USB-UART Module Kit for Kernel and U-boot log.

https://www.hardkernel.com/shop/usb-uart-module-kit/

https://wiki.odroid.com/accessory/devel ... le&s[]=kit

Even if the display is working well. UI resolution is not 4K. Are you aware of this fact?

Code: Select all

Android display composer(surface flinger) has a limitation up to 2560x1080 resolution. Therefore, we have to resize and scale fb as 32:9 aspect ratio.
The rendering surface area must be resized to 1920x540 for your monitor even the HDMI PHY is running at 3840x1080.
If you want to try that 1920x540 resolution, I will make a trial OS image.

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