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DTS conifguration issues for HDMI_DDC on i.MX6Q

Question asked by Chris Conley on Jan 13, 2014
Latest reply on Feb 3, 2014 by Chris Conley

I'm trying to get the i.MX6Q HDMI_DDC I2C bus configured on my platform and I'm running into issues.  I've looked at all the dts files up through 3.12.y and I see a lot of using other buses (I2C2, etc), but other than a pinmux for HDCP, there's nothing I can find showing how to setup the DDC as a master I2C bus.


I tried the following:

hdmi_ddc: i2c@00127F00 {

                compatible = "fsl,imx6q-i2c", "fsl,imx21-i2c";

                #address-cells = <1>;

                #size-cells = <0>;

                reg = <0x00127F00 0x4000>;

                clocks = <&clks 124>, <&clks 123>;

                clock-names = "hdmi_isfr", "hdmi_iahb";

                interrupt-parent = <&intc>;

                interrupts = <147 0x04>;

                status = "disabled";


                sink: edid@50 {

                    compatible = "fsl,imx6-hdmi-i2c";

                    reg = <0x50>;



hdmi_ddc {

        pinctrl_hdmiddc_1: hdmiddcgrp-1 {

            fsl,pins = <

                MX6QDL_PAD_KEY_COL3__HDMI_TX_DDC_SCL 0x4001b8b1

                MX6QDL_PAD_KEY_ROW3__HDMI_TX_DDC_SDA 0x4001b8b1




&hdmi_ddc {

    pinctrl-names = "default";

  pinctrl-0 = <&pinctrl_hdmiddc_1>;

  status = "okay";


It fails to get the IRQ (there's only 2 HDMI-related IRQs listed in the TRM, the CEC connect IRQ and the main HDMI IRQ (147)). 

I'm building this with Yocto using linux-imx 3.10.17+1.0.0_beta.  I2C1, 2, and 3 are all already created in the system.


Anyone have ideas on why imx-i2c isn't able to create the i2c bus adapter?