Stuck at Uboot - IMX6Q

[huanvh]

Hello

i am writing uboot for my mx6q circuit board based on mx6q sabresd. My board uses 2GB RAM and EMMC 5.1. But I'm stuck at U-Boot, please help me, thanks

U-Boot 2015.04 (Oct 14 2020 - 15:13:53)

CPU:   Freescale i.MX6Q rev1.5 at 792 MHz
CPU:   Temperature 45 C
Reset cause: POR
Board: MX6-SabreSD
I2C:   ready
DRAM:  2 GiB
PMIC:  PFUZE100 ID=0x10
MMC:   Warning: you configured more USDHC controllers(4) then supported by the board (4)
MMC/SD: Reset never completed.
voltage not supported by controller
FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
*** Warning - bad CRC, using default environment

unsupported panel hdmi
In:    serial
Out:   serial
Err:   serial
switch to partitions #0, OK
mmc2(part 0) is current device
Net:   Phy 0 not found
PHY reset timed out
FEC [PRIME]
Error: FEC address not set.

reading logo.bmp
** Unable to read file logo.bmp **
There is no valid bmp file at the given address
Normal Boot
Hit Enter key to stop autoboot:  0
=>
=>
=>
=> U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U-Boot 2015.04 (Oct 14 2020      U▒

When I comment this line off I get a screen like this

CPU:   Freescale i.MX6Q rev1.5 at 792 MHz
CPU:   Temperature 47 C
Reset cause: POR
Board: MX6-SabreSD
I2C:   ready
DRAM:  2 GiB
PMIC:  PFUZE100 ID=0x10
MMC:   Warning: you configured more USDHC controllers(4) then supported by the board (4)
MMC/SD: Reset never completed.
voltage not supported by controller
FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
*** Warning - bad CRC, using default environment

unsupported panel hdmi
In:    serial
Out:   serial
Err:   serial
switch to partitions #0, OK
mmc2(part 0) is current device
Net:   Phy 0 not found
PHY reset timed out
FEC [PRIME]
Error: FEC address not set.

reading logo.bmp
** Unable to read file logo.bmp **
There is no valid bmp file at the given address
Normal Boot
Hit Enter key to stop autoboot:  0
reading zImage
6674280 bytes read in 183 ms (34.8 MiB/s)
reading imx6q-sabresd.dtb
48059 bytes read in 18 ms (2.5 MiB/s)
Kernel image @ 0x12000000 [ 0x000000 - 0x65d768 ]
## Flattened Device Tree blob at 18000000
   Booting using the fdt blob at 0x18000000
   Using Device Tree in place at 18000000, end 1800ebba
switch to ldo_bypass mode!
​

[huanvh · Accepted solution]

Thank @Rita_Wang 

i have solved the problem, error found due to uart level switching ic

[Rita_Wang]

OK, Good news.

[Rita_Wang]

Do you mean if you do not " comment this line off", it can work well? Could you tell us which version of BSP are you using? And what have you modified?