1*************************** 2Freescale i.MX8MQ EVK board 3*************************** 4 5This file documents the Buildroot support for the Freescale i.MX8MQ 6EVK board. 7 8Build 9===== 10 11First, configure Buildroot for the i.MX8MQ EVK board: 12 13If you want to use the NXP kernel: 14 15 make freescale_imx8mqevk_defconfig 16 17Or if you want to use a mainline kernel: 18 19 make imx8mqevk_defconfig 20 21Build all components: 22 23 make 24 25You will find in output/images/ the following files: 26 - bl31.bin 27 - boot.vfat 28 - fsl-imx8mq-evk.dtb 29 - Image 30 - imx8-boot-sd.bin 31 - lpddr4_pmu_train_fw.bin 32 - rootfs.ext2 33 - rootfs.ext4 34 - rootfs.tar 35 - sdcard.img 36 - signed_hdmi_imx8m.bin 37 - u-boot.bin 38 - u-boot.imx 39 - u-boot-nodtb.bin 40 - u-boot-spl-ddr.bin 41 42Create a bootable SD card 43========================= 44 45To determine the device associated to the SD card have a look in the 46/proc/partitions file: 47 48 cat /proc/partitions 49 50Buildroot prepares a bootable "sdcard.img" image in the output/images/ 51directory, ready to be dumped on a SD card. Launch the following 52command as root: 53 54 dd if=output/images/sdcard.img of=/dev/<your-sd-device> 55 56*** WARNING! This will destroy all the card content. Use with care! *** 57 58For details about the medium image layout, see the definition in 59board/freescale/common/imx/genimage.cfg.template_imx8. 60 61Boot the i.MX8MQ EVK board 62========================== 63 64To boot your newly created system: 65- insert the SD card in the SD slot of the board; 66- Configure the switches as follows: 67SW801: ON ON OFF OFF 68SW802: ON OFF 69- put a micro USB cable into the Debug USB Port and connect using a terminal 70 emulator at 115200 bps, 8n1; 71- power on the board. 72 73Enable HDMI output 74================== 75 76To enable HDMI output at boot you must provide the video kernel boot 77argument. To set the video boot argument from U-Boot run after 78stopping in U-Boot prompt: 79 80setenv mmcargs 'setenv bootargs console=${console} root=${mmcroot} video=HDMI-A-1:1920x1080-32@60' 81saveenv 82reset 83 84Change screen resolution to suit your connected display. 85 86Enjoy! 87