I’m connecting a MIPI DSI display to a i.MX6 Quad SBC. It needs a GPIO for the DSI reset line. I’m trying to understand the conflicting info about which GPIO to use.
I’m using Digi Yocto Linux 2.3. The device tree file imx6qdl-ccimx6sbc.dtsi has this entry:
mipi_dsi_reset: mipi-dsi-reset {
compatible = "gpio-reset";
reset-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;
reset-delay-us = <50>;
#reset-cells = <0>;
};
So that suggests I should use GPIO_6_11, but that seems to be in use for NAND, and not available on a SBC connector.
The i.MX6 SBC HW Ref Man, page 64, in the “GPIO and user LEDs” section lists this:
DSI_RESET_N - GPIO_3_26
But, again, I can’t find where GPIO_3_26 is brought out to a connector.
I can use another GPIO, (I chose GPIO_7_13 on the GPIO connector), but I’m trying to understand why the document lists one GPIO, the device tree a second GPIO, and neither seem to be usable. Perhaps I am reading this wrong?
thanks, Michael