112 lines
2.9 KiB
Plaintext
112 lines
2.9 KiB
Plaintext
*******************************
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Freescale i.MX6 Sabre SD boards
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*******************************
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This file documents the Buildroot support for the Freescale i.MX6 Sabre SD
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boards based on i.MX6Q, i.MX6DL and iMX6QP.
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Thanks to the SPL support in U-Boot it is possible to run a single
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sdcard.img in all i.MX6 Sabre SD board variants.
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This configuration uses U-Boot mainline and kernel mainline.
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Build
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=====
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First, configure Buildroot for the i.MX6 Sabre SD board:
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make imx6-sabresd_defconfig
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Build all components:
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make
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You will find the following files in output/images/ :
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- imx6q-sabresd.dtb
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- imx6dl-sabresd.dtb
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- imx6qp-sabresd.dtb
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- rootfs.ext4
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- rootfs.tar
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- sdcard.img
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- u-boot.imx
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- zImage
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Create a bootable SD card
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=========================
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To determine the device associated to the SD card have a look in the
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/proc/partitions file:
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cat /proc/partitions
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Buildroot prepares a bootable "sdcard.img" image in the output/images/
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directory, ready to be dumped on a SD card. Launch the following
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command as root:
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dd if=output/images/sdcard.img of=/dev/<your-sd-device>
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*** WARNING! This will destroy all the card content. Use with care! ***
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For details about the medium image layout, see the definition in
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board/freescale/common/imx/genimage.cfg.template.
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Boot the i.MX6 Sabre SD board
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=============================
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To boot your newly created system:
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- insert the SD card in the SD3 slot of the board (close to the HDMI connector);
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- put a micro USB cable into the Debug USB Port and connect using a terminal
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emulator at 115200 bps, 8n1;
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- power on the board.
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Testing graphics on the i.MX6 Sabre SD board
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============================================
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The imx6-sabresd_qt5_defconfig allows to quickly test the graphics
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capabilities of i.MX6 using the opensource Etnaviv graphics stack
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and kernel mainline.
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In order to build it:
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make imx6-sabresd_qt5_defconfig
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make
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Then flash the SD card as explained above.
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Running kmscube application:
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# kmscube
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Running Qt5 Cinematic Demo:
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# export QT_QPA_EGLFS_KMS_CONFIG=/root/sabresd.json
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# export QT_QPA_EGLFS_ALWAYS_SET_MODE=1
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# /usr/share/Qt5/CinematicExperience/Qt5_CinematicExperience
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Running gl2mark benchmark:
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# glmark2-es2-drm
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Testing video playback on the i.MX6 Sabre SD board
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==================================================
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As the mx6sabresd has two display outputs (LVDS and HDMI), it is necessary to
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know what is the connector that corresponds to the HDMI output.
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This information can be found by running:
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# modetest
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And search for the HDMI connector number. In our case it shows up as 37.
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In the mx6sabresd prompt run the following Gstreamer pipeline:
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# gst-launch-1.0 filesrc location=/root/trailer_1080p_h264_mp3.avi ! avidemux ! \
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h264parse ! v4l2video1dec capture-io-mode=dmabuf ! kmssink connector-id=37 \
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name=imx-drm sync=0
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(The video used on this example was retrieved from:
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http://linode.boundarydevices.com/videos/trailer_1080p_h264_mp3.avi)
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Enjoy!
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