Hi,
I am currently working on the i.MX8ULP device tree files to have the OV5640 camera working with libcamera on the MCIMX8ULP-EVK9 evaluation kit.
The modifications
Among the changes I have made, I replaced the following in imx8ulp.dtsi:
- mipi_csi0: csi@2daf0000 {
- compatible = "fsl,imx8ulp-mipi-csi2", "fsl,mxc-mipi-csi2";
- reg = <0x2daf0000 0x10000>,
- <0x2dad0000 0x10000>;
- clocks = <&pcc5 IMX8ULP_CLK_CSI>,
- <&pcc5 IMX8ULP_CLK_CSI_CLK_UI>,
- <&pcc5 IMX8ULP_CLK_CSI_CLK_ESC>,
- <&pcc5 IMX8ULP_CLK_CSI_REGS>;
- clock-names = "clk_core", "clk_ui", "clk_esc", "clk_regs";
- power-domains = <&scmi_devpd IMX8ULP_PD_MIPI_CSI>;
- assigned-clocks = <&cgc2 IMX8ULP_CLK_PLL4_PFD1>,
- <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV1>,
- <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV2>,
- <&pcc5 IMX8ULP_CLK_CSI>,
- <&pcc5 IMX8ULP_CLK_CSI_CLK_UI>,
- <&pcc5 IMX8ULP_CLK_CSI_CLK_ESC>;
- assigned-clock-parents = <0>, <0>, <0>,
- <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV1>,
- <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV2>,
- <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV2>;
- assigned-clock-rates = <316800000>,
- <316800000>,
- <316800000>,
- <105600000>,
- <79200000>,
- <79200000>;
- runtime_suspend;
- status = "disabled";
+ mipi_csi0: csi@2daf0000 {
+ compatible = "fsl,imx8mp-mipi-csi2", "fsl,imx8mm-mipi-csi2";
+ reg = <0x2daf0000 0x10000>,
+ <0x2dad0000 0x10000>;
+ interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&cgc2 IMX8ULP_CLK_LPAV_BUS_DIV>,
+ <&pcc5 IMX8ULP_CLK_CSI_CLK_UI>,
+ <&pcc5 IMX8ULP_CLK_CSI>;
+ clock-names = "pclk", "wrap", "phy";
+ power-domains = <&scmi_devpd IMX8ULP_PD_MIPI_CSI>;
+ assigned-clocks = <&cgc2 IMX8ULP_CLK_PLL4_PFD1>,
+ <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV1>,
+ <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV2>,
+ <&pcc5 IMX8ULP_CLK_CSI>,
+ <&pcc5 IMX8ULP_CLK_CSI_CLK_UI>,
+ <&pcc5 IMX8ULP_CLK_CSI_CLK_ESC>;
+ assigned-clock-parents = <0>, <0>, <0>,
+ <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV1>,
+ <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV2>,
+ <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV2>;
+ assigned-clock-rates = <316800000>,
+ <316800000>,
+ <316800000>,
+ <105600000>,
+ <79200000>,
+ <79200000>;
+ runtime_suspend;
+ status = "disabled";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ };
+
+ port@1 {
+ reg = <1>;
+
+ mipi_csi_0_out: endpoint {
+ remote-endpoint = <&isi_in_0>;
+ };
+ };
};
};
I know those modification are not likely to be enough as they are, but the imx-mipi-csis driver does not support i.MX8ULP so I am trying to baby step towards a working device tree. (I am using this binding documentation https://github.com/nxp-imx/linux-imx/blob/lf-6.6.y/Documentation/devicetree/bindings/media/nxp%2Cimx... and looking at the associated driver source code https://github.com/nxp-imx/linux-imx/blob/lf-6.6.y/drivers/media/platform/nxp/imx-mipi-csis.c).
The patch is attached to this message (0002-remove-camdev-modify-csi-and-isi-drivers-change-clocks-dtsi.patch)
The issue
Now, when I flash the imx-image-full to the board, everything boots but the mipi-csi node is not binding. When I check why, I have the following log:
root@imx8ulp-9x9-lpddr4-evk:~# dmesg | grep 2daf
[ 2.175433] /soc@0/bus@2d800000/csi@2daf0000: Relaxing link with /i2c-rpbus-0/ov5640_mipi@3c/port/endpoint
[ 2.175476] /i2c-rpbus-0/ov5640_mipi@3c: Relaxing link with /soc@0/bus@2d800000/csi@2daf0000/ports/port@0/endpoint
[ 2.175523] i2c 0-003c: Fixed dependency cycle(s) with /soc@0/bus@2d800000/csi@2daf0000/ports/port@0/endpoint
[ 2.246985] /i2c-rpbus-0/ov5640_mipi@3c Dropping the fwnode link to /soc@0/bus@2d800000/csi@2daf0000/ports/port@0/endpoint
[ 2.247043] /soc@0/bus@2d800000/csi@2daf0000 Linked as a fwnode consumer to /i2c-rpbus-0/ov5640_mipi@3c
[ 2.247072] /soc@0/bus@2d800000/csi@2daf0000 Dropping the fwnode link to /i2c-rpbus-0/ov5640_mipi@3c/port/endpoint
[ 2.247125] device: 'i2c:0-003c--platform:2daf0000.csi': device_add
[ 2.247220] platform 2daf0000.csi: Linked as a sync state only consumer to 0-003c
[ 2.247233] /soc@0/bus@2d800000/csi@2daf0000 Dropping the fwnode link to /i2c-rpbus-0/ov5640_mipi@3c
[ 2.712236] platform 2daf0000.csi: Retrying from deferred list
[ 2.713521] bus: 'platform': __driver_probe_device: matched device 2daf0000.csi with driver imx-mipi-csis
[ 2.713542] bus: 'platform': really_probe: probing driver imx-mipi-csis with device 2daf0000.csi
[ 2.713573] imx-mipi-csis 2daf0000.csi: no pinctrl handle
[ 2.713793] imx-mipi-csis 2daf0000.csi: adding to PM domain MIPI_CSI
[ 2.713809] imx-mipi-csis 2daf0000.csi: genpd_add_device()
[ 2.714562] imx-mipi-csis 2daf0000.csi: error -ENOENT: Failed to get clk 'axi'
[ 2.721895] imx-mipi-csis 2daf0000.csi: removing from PM domain MIPI_CSI
[ 2.721910] imx-mipi-csis 2daf0000.csi: genpd_remove_device()
[ 2.722391] imx-mipi-csis: probe of 2daf0000.csi failed with error -2
The line [ 2.713573] imx-mipi-csis 2daf0000.csi: no pinctrl handle indicates that I should add some pinctrl management in the node. When I look in the IOMUXC chapter of the i.MX8ULP reference manual, an IOMUX spreadsheet that could help me with this is mentioned but I can't find it.
Does somebody know where I can get this IOMUX spreadsheet ?
Thanks
Karim
