we have an LVDS display which is working correctly, but the system is not passing EMC tests because of the signals on the LVDS cable.
According to this article:
it should be possible to adjust drive strength and slew rate on the Apalis TK1.
The informations I’ve collected until now are that:
- tegra124-pinctrl driver is responsible of control pin configuration (pinctrl-tegra124.c « pinctrl « drivers - linux-toradex.git - Linux kernel for Apalis and Colibri modules)
- according to Apalis TK1 datasheet (page 26) LVDS signals are in the
- it’s possible to adjust drive strength and slew rate in device tree like this: tegra124-apalis-pinmux.dtsi « tegra124-platforms « dts « boot « arm « arch - linux-toradex.git - Linux kernel for Apalis and Colibri modules
The thing that’s not clear to me is which pin group I should drive to adjust lvds signals. If you could tell me which one I should use in
nvidia,pins = "drive_xxx"; and explain how to correctly deduct it for the future, it would be very useful.