i.MX8MQ EVK not booting with latest mainline U-Boot

i.MX8MQ EVK not booting with latest mainline U-Boot

[Fabio Estevam]

Hi Peng and Andrey,

Lukas reported that i.MX8MQ EVK does not boot with the latest U-Boot
and I confirm the same here too.

We are following the instructions from doc/board/freescale/imx8mq_evk.rst

I haven't debugged this yet and I am wondering if you have any suggestions.

Thanks,

Fabio Estevam

i.MX8MQ EVK not booting with latest mainline U-Boot

[ZHIZHIKIN Andrey]

Hello Fabio,

> -----Original Message-----
> From: Fabio Estevam <festevam@gmail.com>
> Sent: Monday, February 22, 2021 3:45 AM
> To: Peng Fan <peng.fan@nxp.com>; ZHIZHIKIN Andrey <andrey.zhizhikin@leica-
> geosystems.com>
> Cc: Lukas Rusak <lorusak@gmail.com>; U-Boot-Denx <u-boot@lists.denx.de>
> Subject: i.MX8MQ EVK not booting with latest mainline U-Boot
> 
> This email is not from Hexagon?s Office 365 instance. Please be careful while
> clicking links, opening attachments, or replying to this email.
> 
> 
> Hi Peng and Andrey,
> 
> Lukas reported that i.MX8MQ EVK does not boot with the latest U-Boot and I
> confirm the same here too.

Unfortunately, I do not poses the i.MX8MQ EVK HW so I never tested the boot process. There is not much I can contribute here.

> 
> We are following the instructions from doc/board/freescale/imx8mq_evk.rst

Perhaps the only thing I can suggest here is to check the documentation (ATF, OP-TEE and DDR firmware version and placement) and align it with `imx-boot` Makefile to see if they match.

Can somebody maybe share more info on which errors are observed during the boot? Any boot log would be helpful here as well.

> 
> I haven't debugged this yet and I am wondering if you have any suggestions.
> 
> Thanks,
> 
> Fabio Estevam

-- Andrey

i.MX8MQ EVK not booting with latest mainline U-Boot

[Fabio Estevam]

Hi Andrey,

On Mon, Feb 22, 2021 at 5:52 AM ZHIZHIKIN Andrey
<andrey.zhizhikin@leica-geosystems.com> wrote:

> Can somebody maybe share more info on which errors are observed during the boot? Any boot log would be helpful here as well.

I investigated this boot issue. U-Boot 2020.04 works, but 2020.07 does not.

I run a git bisect and found that the guilty commit was:

commit c738adb8dbbf28a34f8574239a241e85d46f3877
Author: Kever Yang <kever.yang@rock-chips.com>
Date:   Mon Mar 30 11:56:17 2020 +0800

    tool: Move ALIGN_MASK to header as common MACRO

    The ALIGN code is need by many files who need handle structure or image
    align, so move the macro to imagetool.h file.

    Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
    Reviewed-by: Punit Agrawal <punit1.agrawal@toshiba.co.jp>
    Reviewed-by: Tom Rini <trini@konsulko.com>

The __ALIGN_MASK definition used  in imx8image was not standard, so I
restored it like this:

--- a/tools/imx8mimage.c
+++ b/tools/imx8mimage.c
@@ -32,6 +32,8 @@ static uint32_t rom_version = ROM_V1;

 #define HDMI_FW_SIZE           0x17000 /* Use Last 0x1000 for IVT and CSF */
 #define ALIGN_SIZE             0x1000
+#define ALIGN(x,a)                     __ALIGN_MASK((x),
(__typeof__(x))(a) - 1, a)
+#define __ALIGN_MASK(x,mask,mask2)     (((x) + (mask)) / (mask2) * (mask2))

 static uint32_t get_cfg_value(char *token, char *name,  int linenr)
 {

and now the board boots again:

U-Boot SPL 2021.04-rc2-00090-gbbc0fcc302ba-dirty (Feb 22 2021 - 09:08:30 -0300)
PMIC:  PFUZE100 ID=0x10
Normal Boot
Trying to boot from MMC2


U-Boot 2021.04-rc2-00090-gbbc0fcc302ba-dirty (Feb 22 2021 - 09:08:30 -0300)

CPU:   Freescale i.MX8MQ rev2.0 at 1000 MHz
Reset cause: POR
Model: NXP i.MX8MQ EVK
DRAM:  3 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... *** Warning - No block device, using
default environment

In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet at 30be0000
Hit any key to stop autoboot:  0
u-boot=>
u-boot=>
u-boot=>
u-boot=> saveenv
Saving Environment to MMC... No block device
Failed (1)
u-boot=>

I will submit the patch soon.

The issue now is that saving the environment to the SD card is no
longer working.

I will investigate the SD card issue now.

Thanks,

Fabio Estevam

i.MX8MQ EVK not booting with latest mainline U-Boot

[Fabio Estevam]

Hi Andrey,

On Mon, Feb 22, 2021 at 9:19 AM Fabio Estevam <festevam@gmail.com> wrote:

> The issue now is that saving the environment to the SD card is no
> longer working.
>
> I will investigate the SD card issue now.

This was caused by the following commit:

commit 247bbeb74c186963d9365db3136d0285618bd9a7
Author: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
Date:   Sat Dec 5 17:29:17 2020 +0000

    ARM: dts: imx8m: increase off-on delay on the SD Vcc regulator

    Some SD Card controller and power circuitry has increased capacitance,
    which keeps the internal logic remains powered after regulator is switch
    off. This is generally the case when card is switched to SD104 mode,
    where a power cycle should be performed. In case if the card internal
    logic remains powered, it causes a subsequent failure of mode
    transition, effectively leading to failed enumeration.

    Introduce a delay of 20 msec in order to provide a possibility for
    internal card circuitry to drain voltages and perform a power cycle
    correctly.

    Similar fix is done in commit c49d0ac38a76 ("ARM: dts: rmobile: Increase
    off-on delay on the SD Vcc regulator") targeted Renesas SOCs.

    Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
    Cc: Stefano Babic <sbabic@denx.de>

I will send a fix.

Thanks,

Fabio Estevam