Dump EDID from connected monitor

[mithro]

It would be good to have a command which dumped the raw EDID from the monitor connected to an TX port.

[fallen]

Please give this a try: https://github.com/fallen/HDMI2USB-misoc-firmware/tree/hdmi_out_edid_dump

• Boot
• Connect a monitor to HDMI out port
• in the serial command line interface enter the following command:

debug edid 0 for hdmi_out0 debug edid 1 for hdmi_out1

If it outputs something starting with 00 FF FF FF FF FF FF 00 it should be your monitor EDID. You can copy paste it to http://www.edidreader.com/ to check the validity of the EDID dump.

[enjoy-digital]

Thanks, I'll test it on the Opsis tomorrow (I can't test on the Atlys since I damaged mine plugging 12V in it (instead of 5V...))

Can you keep i2c.c untouched and create specific hdmi_out0.c and hdmi_out1.c files? (We will avoid duplicating things later as it's was done on Mixxeo: https://github.com/m-labs/mixxeo-soc/blob/master/software/Makefile#L49)

[enjoy-digital]

It works fine here with the Opsis:

Monitor connected to output0

HDMI2USB>debug edid 0
00 FF FF FF FF FF FF 00 26 CD 1A 56 01 01 01 01
00 15 01 03 81 30 1B 78 2A 94 A5 A4 5A 54 A1 27
0E 50 54 BF EF 80 B3 00 A9 40 95 00 81 40 81 80
95 0F 71 4F D1 C0 02 3A 80 18 71 38 2D 40 58 2C
45 00 DD 0C 11 00 00 1E 00 00 00 FF 00 30 0A 20
20 20 20 20 20 20 20 20 20 20 00 00 00 FD 00 37
4C 1E 53 11 00 0A 20 20 20 20 20 20 00 00 00 FC
00 50 4C 32 32 37 33 48 44 53 0A 20 20 20 01 1D
HDMI2USB>debug edid 1
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Monitor connected to output1

HDMI2USB>debug edid 0
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
HDMI2USB>debug edid 1
00 FF FF FF FF FF FF 00 26 CD 1A 56 01 01 01 01
00 15 01 03 81 30 1B 78 2A 94 A5 A4 5A 54 A1 27
0E 50 54 BF EF 80 B3 00 A9 40 95 00 81 40 81 80
95 0F 71 4F D1 C0 02 3A 80 18 71 38 2D 40 58 2C
45 00 DD 0C 11 00 00 1E 00 00 00 FF 00 30 0A 20
20 20 20 20 20 20 20 20 20 20 00 00 00 FD 00 37
4C 1E 53 11 00 0A 20 20 20 20 20 20 00 00 00 FC
00 50 4C 32 32 37 33 48 44 53 0A 20 20 20 01 1D

I also checked with www.edidreader.com.

Can you just create 2 separate hdmi_out0.c, hdmi_out1.c files and integrate the i2c code in it? Then you can send a pull request or a patch.

Thanks

[fallen]

Thanks for the test and the review, I updated the branch to create hdmi_out{0,1}.{h,c} like you said.

[fallen]

I added support for extended EDID and rebased the pull request to fix the build for "base" targets (where there is no hdmi_out0/1)