RPI 4 U-Boot 2021.01 Yocto fails with Card did not respond to voltage select! : -110

[Kaiwan N Billimoria]

Hi all,

Env am using:
Yocto 3.3.1 hardknott
 meta-raspberrypi bsp layer
 U-Boot 2021.01 (it pulls this in)

The boot on an RPi 4B consistently fails with:

<pre>
U-Boot 2021.01 (Jan 11 2021 - 18:11:43 +0000)
DRAM: 1.9 GiB
RPI 4 Model B (0xb03114)

MMC: mmcnr at 7e300000: 1, emmc2 at 7e340000: 0

Loading Environment from FAT... unable to select a mode
In: serial
Out: serial
Err: serial
Net: eth0: ethernet at 7d580000
PCIe BRCM: link up, 5.0 Gbps x1 (SSC)
starting USB...
Bus xhci_pci: Register 5000420 NbrPorts 5
Starting the controller
USB XHCI 1.00
scanning bus xhci_pci for devices... 2 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found

Hit any key to stop autoboot: 0

switch to partitions #0, OK
mmc0 is current device

** No partition table - mmc 0 **
Card did not respond to voltage select! : -110

Device 0: unknown device
...
</pre>


Also, FYI:

U-Boot> mmcinfo
Device: emmc2 at 7e340000
Manufacturer ID: 3
OEM: 5344
Name: SL64G
Bus Speed: 25000000
Mode: MMC legacy
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 59.5 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
U-Boot>

Should 'Mode' be different?? High Speed?
Unsure as to what will fix this... any help appreciated ! TIA,

Funny thing is, it was working a week back (with Yocto 3.2 - though
even that doesn't work now; same issue)..

Regards,
Kaiwan.