How to change HDMI in EDID

VIM4
1

Which system do you use? Android, Ubuntu, OOWOW or others?

Android

Which version of system do you use? Please provide the version of the system here:

self-build

Please describe your issue below:

Hi,
EDID content DTD read from VIM4 HDMI is 1920x1080P60. How do I change it to 4K EDID?
thanks.

Post a console log of your issue below:

This is the raw edid read from vim4 HDMI port.

Raw EDID:
00 FF FF FF FF FF FF 00 05 AC 30 00 01 00 00 00
2B 1B 01 03 80 73 41 78 0A CF 74 A3 57 4C B0 23
09 48 4C 21 08 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
45 00 20 C2 31 00 00 1E 01 1D 00 BC 52 D0 1E 20
B8 28 55 40 20 C2 31 00 00 1E 00 00 00 FC 00 41
4D 4C 20 54 56 0A 20 20 20 20 20 20 00 00 00 FD
00 3B 46 1F 8C 3C 00 0A 20 20 20 20 20 20 01 94

02 03 3E F0 53 10 1F 14 05 13 04 20 22 3C 3E 12
16 03 07 11 15 02 06 01 2F 09 7F 05 15 07 50 57
07 01 3D 07 C0 5F 7E 01 83 01 00 00 6E 03 0C 00
20 00 B8 3C 2F 80 80 01 02 03 04 E2 00 FB 01 1D
00 72 51 D0 1E 20 6E 28 55 00 20 C2 31 00 00 1E
8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00
00 18 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 74

Delete this line and post your log here.

2

@Cn_Lien What specific problem did you encounter? Are you referring to hdmi edid or hdmi in edid? It’s not necessary to make such modifications.

3

Hello @goenjoy,
I am referring to the HDMI input port EDID. It should be EDID 2.0 to support 4K resolution, not EDID1.4.
For example, I use the official version v240620 image, and the EDID DTD read is 3840x2160P30.
But the HDMI EDID DTD compiled from the source code I downloaded from the manifest repository is 1920x1080P60.
How do I modify the EDID of the source code or switch the EDID to 2.0?
Thank you.

4

@Cn_Lien You need to delete the out directory and then compile the firmware.

5

Hello @goenjoy
That works to change EDID to DTD 4Kx2H@30Hz after delete the out directory and then complie the firmware.
But from the datasheet, HDMI should be able to support 4Kx2K@60Hz. How to modify the EDID DTD to 4Kx2K@60Hz?
Thank you.