Hi,
I am able to boot Linux 5.15.14 on an imx8mm-evk running U-Boot 2022.01 just fine.
However, if I try to boot a 5.16 kernel, the boot fails in most of the attempts (like in 80% of the boots. It does boot completely in some of the attempts).
Starting kernel ... (hangs here)
Using earlycon I see that it hangs around the imx-sdma driver load: [ 0.681930] imx-sdma 302c0000.dma-controller: Direct firmware load for imx/sdma/sdma-imx7d.bin failed with error -2 [ 0.689628] imx-sdma 302c0000.dma-controller: external firmware not found, using ROM firmware [ 0.689635] imx-sdma 302b0000.dma-controller: external firmware not found, using ROM firmware
Tried to disable the imx-sdma driver and the hang also happens, so it is something else that causes the hang.
If I use U-Boot from NXP the problem does not happen.
I tried to select the imx8m power domain options:
--- a/configs/imx8mm_evk_defconfig +++ b/configs/imx8mm_evk_defconfig @@ -72,6 +72,8 @@ CONFIG_MII=y CONFIG_PINCTRL=y CONFIG_SPL_PINCTRL=y CONFIG_PINCTRL_IMX8M=y +CONFIG_POWER_DOMAIN=y +CONFIG_IMX8M_POWER_DOMAIN=y CONFIG_DM_PMIC=y CONFIG_SPL_DM_PMIC_PCA9450=y CONFIG_DM_REGULATOR=y
but it did not help.
The same behavior is seen with the top of tree U-Boot.
Does anyone have any ideas as to what is missing?
Thanks,
Fabio Estevam