Tool/software:
Hi experts,
My customer is using the TMDS437EVM, but there is no video output to HDMI. They are using SDK v9.3.5.2.
Q: They have removed the LCD and connected a DHMI cable, but are there any additional steps they need to take?
3.2.4.6. DSS — Processor SDK Linux for AM437X Documentation
Additional information is below.
I2C confirmation
root@am437x-evm:~# i2cdetect -l
i2c-0 i2c OMAP I2C adapter I2C adapter
i2c-1 i2c OMAP I2C adapter I2C adapter
root@am437x-evm:~# i2cdetect -y 1
Warning: Can't use SMBus Quick Write command, will skip some addresses
0 1 2 3 4 5 6 7 8 9 a b c d e f
00:
10:
20:
30: 30 -- -- -- -- -- -- --
40:
50: -- -- -- -- -- -- -- -- -- -- -- -- UU -- -- --
60:
70:
root@am437x-evm:~# i2cget -y 1 0x30 0x1B
0x00
root@am437x-evm:~# i2cget -y 1 0x30 0x1A
0x00
root@am437x-evm:~# i2cget -y 1 0x30 0x3C
0x00
root@am437x-evm:~# i2cget -y 1 0x30 0x3D
0x00
HDMI output was possible with the old SDK (kernel 3.14.43). The steps are below, but they are unstable.
- Update the zImage
- Copy am437x-gp-evm-hdmi.dtb to mmcblk0p1
- U-boot
- fatload mmc 0:1 0x82000000
- zImage fatload mmc 0:1 0x88000000
- am437x-gp-evm-hdmi.dtb
- bootz 0x82000000 - 0x88000000
- Set either of the following:
- setenv fdtfile am437x-gp-evm-hdmi.dtb or setenv fdtfile am437x-gp-evm.dtb
- saveenv
Best regards,
O.H