I am currently working under eMMC boot in iMX6 SABRE-SDP, So i followed the Android Frequently Asked Questions guide for boot using fastboot q tool.
The method which i made is that,
i have entered in the u-boot as,
U-Boot > fastboot q
fastboot is in init......flash target is MMC:1
USB Mini b cable Connected!
Then i placed the eMMC images in image folder,
Here i can able to flash the images to the corresponding devices.I changed to the SW6 switch to 11010110 .But when i used to enter fastboot reboot, it shows me it is getting resetted, even after along time also there is no changes in the output screen.
Note: The images i used is of android_jb4.2.2_1.0.0-ga_image_6qsabresd, eMMC->system.img,recovery.img,boot.img,u-boot(no padding) .
But still there is no changes in the output screen.