TDA4AL-Q1: unable to select a mode : -5 /spl: mmc init failed with error: -524 / SPL: failed to boot from all boot devices

Hi Keerthy,

      Yes，we boot from eMMC. The operation temperature of EMMC KLM8G1GEUF-B04Q is automotive class -40℃~105℃. So  -10 C is acceptable temperature range.

Hi Jun,

First can you confirm that the same works at room temperature?

- Keerthy

Hi Keerthy,

      The board works at normal time. The probability of boot error is high at low temperatures, and it has also occurred in room temperature environments.

Hi,

What is the top speed of eMMC? Is that HS400?

- Keerthy

Hi Keerthy,

          The top speed of eMMC is HS400.I attach the power-on and power-off sequence. please help analyse the log,thanks!normal boot log.DAT

emmc init error log 20231115A.DAT

hi jun 

analysis for the logs which you shared in that we are getting a switch error as response from the emmc.

also i could see that there is communication error when sending the cmd8(to get the ext_csd)

Have you checked the stability at lower speed  HS200 ,DDR50, legacy ?

form the dtsi can you remove the itap and otap values form the high speed modes and see if its working 

Also can you check with the emmc vendor on why there is a switch error as a response from the device.

This issue is coming on the single board on all the board ?

Regards
diwakar