MobileRead Forums - View Single Post - PW2 flashing system after eMMC replacement

mscuttari · 08-03-2022, 01:15 PM

I think I've found the problem.
The interrupt-checking loop inside drivers/mmc/imx_edshc.c, at line 380, never terminates. Seems like the interrupt never gets raised.

Code:

	while (!(tmp = 
		 (readl(&regs->irqstat) & IRQSTAT_TC))
	       );

A quick (hand-written) draft of the stack trace:

Code:

esdhc_send_cmd
mmc_read
idme_check_update
setup_board_info
...

I suspect the emmc to have failed, and thus the DMA to not raise the interrupt for the finished operation, but I don't know how to confirm that.

Aside from this, I don't understand why the stock pre-built u-boot.bin is not printing anything at all.

08-03-2022, 01:15 PM	#8
mscuttari Junior Member Posts: 7 Karma: 10 Join Date: Aug 2022 Device: Kindle Paperwhite 2	I think I've found the problem. The interrupt-checking loop inside drivers/mmc/imx_edshc.c, at line 380, never terminates. Seems like the interrupt never gets raised. Code: while (!(tmp = (readl(&regs->irqstat) & IRQSTAT_TC)) ); A quick (hand-written) draft of the stack trace: Code: esdhc_send_cmd mmc_read idme_check_update setup_board_info ... I suspect the emmc to have failed, and thus the DMA to not raise the interrupt for the finished operation, but I don't know how to confirm that. Aside from this, I don't understand why the stock pre-built u-boot.bin is not printing anything at all.