Re: [PATCH] arm64: dts: imx8mp-evk: Specify ADV7535 register addresses

[Frank Li]

On Tue, Mar 24, 2026 at 01:52:03PM +0800, Liu Ying wrote:
> MIPI DSI to HDMI bridge ADV7535 CEC default register address is 0x3c
> on an I2C bus.  And, OV5640 camera uses the same address on the same
> I2C bus.  To resolve this conflict, use 0x3b as ADV7535 CEC register
> address by specifying all ADV7535 register addresses.

Does cec start address programmable?  generally i2c address is fixed or
controller by some gpio.

Frank
>
> Fixes: 6f6c18cba16f ("arm64: dts: imx8mp-evk: add camera ov5640 and related nodes")
> Signed-off-by: Liu Ying <victor.liu@xxxxxxx>
> ---
>  arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> index aedc09937716..d0a2bd975a18 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> @@ -602,7 +602,8 @@ ov5640_mipi_0_ep: endpoint {
>
>  	hdmi@3d {
>  		compatible = "adi,adv7535";
> -		reg = <0x3d>;
> +		reg = <0x3d>, <0x3f>, <0x3b>, <0x38>;
> +		reg-names = "main", "edid", "cec", "packet";
>  		interrupt-parent = <&gpio1>;
>  		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;
>  		adi,dsi-lanes = <4>;
>
> ---
> base-commit: 09c0f7f1bcdbc3c37a5a760cbec76bf18f278406
> change-id: 20260324-imx8mp-evk-adv7535-cec-reg-addr-2de67760133a
>
> Best regards,
> --
> Liu Ying <victor.liu@xxxxxxx>
>