Hello Heiko,

Am Donnerstag, den 25.02.2021, 14:46 +0100 schrieb Heiko Schocher:

Hello Peng, Teresa,

I am just trying to get linux-stable 5.10.y kernel with current mainline U-Boot on the pyhcore imx8mp board up and running, and fail detecting sd card on usdhc2 in linux.

With U-Boot 2021.01 *same* kernel image/dts detects fine the sd card on usdhc2. So I have no idea, why kernel is here dependent on U-Boot setup! Which is also a bug I think ...

@Peng: Now started a small git bisect in U-Boot tree and your commit

cf8842bc29 - arm: dts: imx8mp: sync dts from Linux Kernel

poped up... with the commit before:

374866a724 - imx8m: clock: add type of set_clk_eqos

the phycore imx8mp board boots fine linux kernel and kernel detects sd card...

Attention: The phytec board support came later into u-boot tree with commit:

c661c511e9 - board: phytec: imx8mp: Add PHYTEC phyCORE-i.MX8MP support

So the board support patch was pending on the list and not tested with your patches I think...

yes, there where not.

Any ideas, what could be the problem?

So far I was able to narrow it down to the changes done in the clock-controller@30380000 node of arch/arm/dts/imx8mp.dtsi:

--- a/arch/arm/dts/imx8mp.dtsi +++ b/arch/arm/dts/imx8mp.dtsi @@ -383,6 +383,22 @@ <&clk IMX8MP_CLK_IPG_AUDIO_ROOT>, <&clk IMX8MP_AUDIO_PLL1>, <&clk IMX8MP_AUDIO_PLL2>; + assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_800M>, + <&clk IMX8MP_ARM_PLL_OUT>, + <&clk IMX8MP_SYS_PLL2_1000M>, + <&clk IMX8MP_SYS_PLL1_800M>, + <&clk IMX8MP_SYS_PLL2_500M>, + <&clk IMX8MP_SYS_PLL1_800M>, + <&clk IMX8MP_SYS_PLL1_800M>; + assigned-clock-rates = <0>, <0>, + <1000000000>, + <800000000>, + <500000000>, + <400000000>, + <800000000>, + <400000000>, + <393216000>, + <361267200>;

If I remove this part again it is booting.

Regards, Teresa

Thanks!

bye, Heiko