-----Original Message----- From: Marcel Ziswiler [mailto:marcel.ziswiler@toradex.com] Sent: 2019年5月2日 17:47 To: Peng Fan peng.fan@nxp.com; Fabio Estevam fabio.estevam@nxp.com; sbabic@denx.de Cc: u-boot@lists.denx.de; dl-uboot-imx uboot-imx@nxp.com Subject: Re: Booting imx_4.14.98_2.0.0_ga on i.MX8QM MEK Board
Hi Peng
On Thu, 2019-05-02 at 03:57 +0000, Peng Fan wrote:
Hi Marcel,
Subject: Booting imx_4.14.98_2.0.0_ga on i.MX8QM MEK Board
Hi Peng, Stefano and Fabio
We are currently trying to boot the Linux kernel from NXP's downstream Linux BSP 4.14.98_2.0.0_ga with mainline U-Boot. However, that currently seems to crash as follows:
...
Does any of you know what exactly could be going on?
SMMU is not powered up, so smmu driver probe triggers abort when accessing SMMU registers. Need power up SC_R_SMMU.
I see, this is actually done in downstream U-Boot:
https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsource .codeaurora.org%2Fexternal%2Fimx%2Fuboot-imx%2Fcommit%2F%3Fh%3Di mx_v2018.03_4.14.98_2.0.0_ga%26id%3D45308e7da90f342c2de7fbec1f8c5 b8bd3f1b8e5&data=02%7C01%7Cpeng.fan%40nxp.com%7C4ba5e68e20 6341af29df08d6cee328ab%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0% 7C0%7C636923872368096043&sdata=tj%2B9CGkzJhsidj8HvniZ7%2B%2 FFK%2BbbE4GrP%2FJ5aeu5NiE%3D&reserved=0
Wondering how that is supposed to work with mainline U-Boot at the end.
I think just power up SMMU is fine in mainline U-Boot.
BTW: The exact same crash is observed on Apalis iMX8 as well, while both the i.MX8QXP MEK as well as Colibri iMX8QXP boot that same downstream Linux kernel just fine. Must be something i.MX 8QuadMax specific...
There is no SMMU on i.MX8QXP.
Funny, at least in downstream U-Boot the same SMMU setup is done (;-p).
CONFIG_IMX_SMMU is not defined for i.MX8QXP.
Regards, Peng.
Regards, Peng.
Thanks, Peng!
Cheers
Marcel
Cheers
Marcel