imx8qxp - MIPI_CSI0_MCLK_OUT for camera clock?

olliistmeinname — Wed, 17 Nov 2021 12:52:32 GMT

Hi,

I am trying to clock my OV5640 through the MIPI_CSI0_MCLK_OUT pin. With the configuration below, there is no clock signal on this pin. Any idea why? Do I need to use a different clock source coming from the ACM module?

DT for Camera:

/* MIPI-CSI0 I2C available on MIPI Camera connector */

&i2c_mipi_csi0 {

#address-cells = <1>;

#size-cells = <0>;

pinctrl-names = "default", "gpio";

pinctrl-0 = <&pinctrl_csi0_lpi2c0>;

pinctrl-1 = <&pinctrl_csi0_lpi2c0_gpio>;

scl-gpios = <&lsio_gpio3 5 GPIO_ACTIVE_HIGH>;

sda-gpios = <&lsio_gpio3 6 GPIO_ACTIVE_HIGH>;

clock-frequency = <100000>;

status = "disabled";

/* MIPI-CSI2 camera */

ov5640_mipi: ov5640_mipi@3c {

compatible = "ovti,ov5640";

reg = <0x3c>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_mipi>;

clocks = <&xtal24m>;

clock-names = "xclk";

csi_id = <0>;

reset-gpios = <&lsio_gpio3 3 GPIO_ACTIVE_LOW>;

powerdown-gpios = <&lsio_gpio3 2 GPIO_ACTIVE_HIGH>;

mclk = <24000000>;

mclk_source = <0>;

mipi_csi;

status = "disabled";

port {

ov5640_mipi_ep: endpoint {

remote-endpoint = <&mipi_csi0_ep>;

data-lanes = <1 2>;

clocks-lanes = <0>;

};

DT for the clock (from freescale/imx8qxp)

xtal24m: clock-xtal24m {

compatible = "fixed-clock";

#clock-cells = <0>;

clock-frequency = <24000000>;

clock-output-names = "xtal_24MHz";

};

Mipi pinctrl:

pinctrl_mipi: mipi {

fsl,pins = <

IMX8QXP_CSI_RESET_LSIO_GPIO3_IO03 0xC0000041

IMX8QXP_CSI_EN_LSIO_GPIO3_IO02 0xC0000041

IMX8QXP_MIPI_CSI0_MCLK_OUT_MIPI_CSI0_ACM_MCLK_OUT 0xc0000041

};

Thanks!

Re: imx8qxp - MIPI_CSI0_MCLK_OUT for camera clock?

igorpadykov — Thu, 18 Nov 2021 00:44:03 GMT

Hi Dfdf

one can try to change status to "okay" as in example

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8qxp-mek-ov5640.dtsi?h=lf-5.10.y

Best regards
igor

Re: imx8qxp - MIPI_CSI0_MCLK_OUT for camera clock?

olliistmeinname — Sat, 20 Nov 2021 00:56:23 GMT

Hi,

That was is, now it works! So simple....

I would set the mipi and i2c status="okay" with an overlay, but for some reason it has to be done directly.

Thanks,

Dfdf

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