Boot issues from emmc on STM32MP2

[nielsenni101]

Hello,

I have a custom board with the STM32MP257FAK processor. I am having issues booting into u-boot from emmc. I can boot into u-boot fine using dfu-util over usb. But once I program in fsbl, ssbl, and meta data into the emmc and try to boot from it I get a error with the metadata partition. See log below.

Any ideas what could cause this error?

[nielsenni101 · Accepted solution]

Resolved the issue.

There was a difference in the .dts file from for the STM32MP25-EV1 board and my custom board with the pin layout for the sdmmc. The evaluation board had this :

&sdmmc2 {
	pinctrl-names = "default";
	pinctrl-0 = <&sdmmc2_b4_pins_a &sdmmc2_d47_pins_a>;
	non-removable;
	no-sd;
	no-sdio;
	st,neg-edge;
	bus-width = <8>;
	vmmc-supply = <&vdd_emmc>;
	vqmmc-supply = <&vddio2>;
	status = "okay";
};
	/omit-if-no-ref/
	sdmmc2_b4_pins_a: sdmmc2-b4-0 {
		pins1 {
			pinmux = <STM32_PINMUX('E', 13, AF12)>, /* SDMMC2_D0 */
				 <STM32_PINMUX('E', 11, AF12)>, /* SDMMC2_D1 */
				 <STM32_PINMUX('E', 8, AF12)>, /* SDMMC2_D2 */
				 <STM32_PINMUX('E', 12, AF12)>, /* SDMMC2_D3 */
				 <STM32_PINMUX('E', 15, AF12)>; /* SDMMC2_CMD */
			slew-rate = <1>;
			drive-push-pull;
			bias-pull-up;
		};
		pins2 {
			pinmux = <STM32_PINMUX('E', 14, AF12)>; /* SDMMC2_CK */
			slew-rate = <2>;
			drive-push-pull;
			bias-pull-up;
		};
	};

	/omit-if-no-ref/
	sdmmc2_d47_pins_a: sdmmc2-d47-0 {
		pins {
			pinmux = <STM32_PINMUX('E', 10, AF12)>, /* SDMMC2_D4 */
				 <STM32_PINMUX('E', 9, AF12)>, /* SDMMC2_D5 */
				 <STM32_PINMUX('E', 6, AF12)>, /* SDMMC2_D6 */
				 <STM32_PINMUX('E', 7, AF12)>; /* SDMMC2_D7 */
			slew-rate = <1>;
			drive-push-pull;
			bias-pull-up;
		};
	};

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and I had this :

&sdmmc1 {
	pinctrl-names = "default";
	pinctrl-0 = <&sdmmc1_pins_mx>;
	status = "okay";

	/* USER CODE BEGIN sdmmc1 */
    
    non-removable;
    no-sd;
    no-sdio;
    st,neg-edge;
    bus-width = <8>;
    vmmc-supply = <&vdd_emmc>;
    vqmmc-supply = <&vddio2>;
	/* USER CODE END sdmmc1 */
};

	sdmmc1_pins_mx: sdmmc1_mx-0 {
		pins1 {
			pinmux = <STM32_PINMUX('D', 8, AF11)>, /* SDMMC1_D7 */
					 <STM32_PINMUX('D', 9, AF11)>, /* SDMMC1_D6 */
					 <STM32_PINMUX('D', 10, AF11)>, /* SDMMC1_D5 */
					 <STM32_PINMUX('D', 11, AF11)>, /* SDMMC1_D4 */
					 <STM32_PINMUX('E', 0, AF10)>, /* SDMMC1_D2 */
					 <STM32_PINMUX('E', 1, AF10)>, /* SDMMC1_D3 */
					 <STM32_PINMUX('E', 2, AF10)>, /* SDMMC1_CMD */
					 <STM32_PINMUX('E', 4, AF10)>, /* SDMMC1_D0 */
					 <STM32_PINMUX('E', 5, AF10)>; /* SDMMC1_D1 */
			bias-disable;
			drive-push-pull;
			slew-rate = <1>;
		};
		pins2 {
			pinmux = <STM32_PINMUX('E', 3, AF10)>; /* SDMMC1_CK */
			bias-disable;
			drive-push-pull;
			slew-rate = <3>;

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 We had to split the pins into two banks like the EV board does. Once we did that we booted fine from emmc. Not sure why that made it work though.