Hi Fabio,

Hi Lukasz,

Myself and Joris have been working on DM conversion of pico-mx7 and the the latest patches are available at: https://github.com/jorisoffouga/u-boot/commits/pico-imx7d/convert-dm

Things are working well so far, except eMMC flashing via DFU.

The following error is seen we flash u-boot-dtb.img:

=> dfu 0 mmc 0 Request would exceed designated area! #Deferred dfu_flush() failed!=>

Joris found a way to fix this problem by doing:

#define CONFIG_DFU_ENV_SETTINGS \ "dfu_alt_info=" \ "spl raw 0x2 0x400;" \

•            "u-boot raw 0x8a 0x400;" \
  

•            "u-boot raw 0x8a 0x1000;" \
  

The change is as follows:

It defines the DFU alt setting "u-boot" to be "raw" (LBA addressed) - starting from 0x8a LBA and with 0x400 * 512B = 512 KiB.

Probably your u-boot is larger than 512 KiB, so you need to increase the "size" of the alt setting to be written to eMMC.

In short - yes this is an acceptable fix.

             "/boot/zImage ext4 0 1;" \
             "/boot/imx7d-pico-hobbit.dtb ext4 0 1;" \
             "/boot/imx7d-pico-pi.dtb ext4 0 1;" \

Is this an acceptable fix?

What does the last field in dfu_alt_info mean?

Thanks,

Fabio Estevam

Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de