Subject: [BISECTED] [BUG]: MMC initialization hang at Zynq Z-turn board
Hello,
I am running Zynq Z-turn board and I face the following issue with MMC initialization in SPL. With u-boot master, I see the message similar to the following:
U-Boot SPL 2019.07-00352-gb5f3eb3393 (Jul 31 2019 - 20:03:42 +0300) mmc boot Trying to boot from MMC1
Then, the u-boot waits forever. I've tried to add debug prints and found that execution is stalled somewhere inside mmc_init(). Using bisect I've found that the following broken commit is the following:
https://gitlab.denx.de/u-boot/custodians/u-boot-mmc/commit/41a9fab8dac841afb...
Would this patch help?
Regards, Peng.
commit 3d296365e4e8823c7c0d4b568fa7accfae4bf895 (refs/bisect/bad) Author: Faiz Abbas faiz_abbas@ti.com Date: Tue Jun 11 00:43:34 2019 +0530
mmc: sdhci: Add support for sdhci-caps-mask Add Support for masking some bits in the capabilities register of a host controller. Also remove the redundant readl() into caps1. Signed-off-by: Faiz Abbas <faiz_abbas@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>Until that commit the behavior was the following:
U-Boot SPL 2019.07-00351-g889a4dfc55 (Jul 31 2019 - 20:01:41 +0300) mmc boot Trying to boot from MMC1 spl_load_image_fat_os: error reading image system.dtb, err - -2 spl_load_image_fat: error reading image u-boot.img, err - -2 SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ###
There were no u-boot.img at the SD card while testing, so this error message is expected here. 5456935a1da3 ("ARM: zynq: Add configuration for Z-turn board") was applied at the top of every testing commit to allow the board initialization in SPL.
What could be wrong with that commit and how could I fix the board?
-- With best regards, Matwey V. Kornilov