.8MMMMMMMM MMMMMMMM8. MMM77$$$$$$7MM MM$$$$$$$$$MMM MM$$$$$$$$$$$$M M$$$$$$$$$$$$MM MO7$$$$$8$$$$$MMM$$$$$N7$$$$7DM M7$$$$$$$M7$$MMM$$7M$$$$$$$7M. M7$$$$$$$$MMMMMMM$$$$$$$$7M. MM$$$$$$7MMMMMMM$$$$$$$MM .MM$7MMMMMMMMMMMMM7$MM. .MM8ZZZMMZZZZZZZMZZZ$MM. .MOZZZZMMZZZZZZZZZM8ZZZZMM MZZMMMZZZZ8MMMMM$ZZZ$MMZZMM .MMMMMZZZZZZZZMMMZZZZZZZMMMMM: M8ZZMMZZZZZZZZNMZZZZZZZZZMMZZMM MZZZZMZZZZZZZZZMMMZZZZZZZZ8MZZZMM .MZZZZMZZZZZZZZZMMMZZZZZZZZMMZZZ8M .MZZZMMMZZZZZZZMMMMM$ZZZZZ$MMZZZMM MMZZMMMMMM8MMNZZZZZ8MMMMMMMMMZZM MMMMZMMMMMMZZZZZZZZZMMMM$ZZZMM. MMZZZZZMMMZZZZZZZZZMMMZZZZZMM MZZZZZZZMNZZZZZZZMMZZZZZZZM. MMMMMZZZZZZZZZMMMM. .MMDZZZZZZZMMD .MMMMMMMM, .... Contents: ========= 1. Description 2. Yocto BSP Layer - RaspberryPi 2.A. Compressed deployed files 2.B. GPU memory 2.C. Add purchased license codecs 2.D. Disable overscan 2.E. Set overclocking options 2.F. Optional - Video camera support with V4L2 drivers 2.G. Images 2.H. Boot to U-Boot 2.I. Image with Initramfs 3. Extra apps 3.A. omxplayer 4. Source code and mirrors 5. Contribution 5.A. Mailing List 5.B. Gerrit Review Server 5.C. Trello Board 6. Maintainers 1. Description ============== This is the general hardware specific BSP overlay for the RaspberryPi device. More information can be found at: http://www.raspberrypi.org/ (Official Site) The core BSP part of meta-raspberrypi should work with different OpenEmbedded/Yocto distributions and layer stacks, such as: * Distro-less (only with OE-Core). * Angstrom (main focus of testing). * Yocto/Poky. 2. Yocto BSP Layer - RaspberryPi ================================ This layer depends on: URI: git://git.yoctoproject.org/poky branch: master revision: HEAD URI: git://github.com/openembedded/meta-oe.git layers: meta-multimedia branch: master revision: HEAD How to use it: 1. source poky/oe-init-build-env rpi-build 2. Add needed layer to bblayers.conf: - meta-raspberrypi 3 Set MACHINE to raspberrypi in local.conf 4. bitbake rpi-hwup-image 5. dd to a SD card the generated sdimg file (use xzcat if rpi-sdimg.xz is used) 6. Boot your RPI. 2.A. Optional - compressed deployed files: ========================================== 1. Overwrite IMAGE_FSTYPES in local.conf IMAGE_FSTYPES = "tar.bz2 ext3.xz" 2. Overwrite SDIMG_ROOTFS_TYPE in local.conf SDIMG_ROOTFS_TYPE = "ext3.xz" 3. Overwrite SDIMG_COMPRESSION in local.conf SDIMG_COMPRESSION = "xz" *Accommodate the values above to your own needs (ex: ext3 / ext4). 2.B. Optional - GPU memory: =========================== Variable : Details GPU_MEM : GPU memory in megabyte. Sets the memory split between the ARM and GPU. ARM gets the remaining memory. Min 16. Default 64. GPU_MEM_256 : GPU memory in megabyte for the 256MB Raspberry Pi. Ignored by the 512MB RP. Overrides gpu_mem. Max 192. Default not set. GPU_MEM_512 : GPU memory in megabyte for the 512MB Raspberry Pi. Ignored by the 256MB RP. Overrides gpu_mem. Max 448. Default not set. 2.C.Optional - Add purchased license codecs: ============================================ To add you own licenses use variables KEY_DECODE_MPG2 and KEY_DECODE_WVC1 in local.conf. Example: KEY_DECODE_MPG2 = "12345678" KEY_DECODE_WVC1 = "12345678" You can supply more licenses separated by comma. Example: KEY_DECODE_WVC1 = "0x12345678,0xabcdabcd,0x87654321" 2.D. Optional - Disable overscan: ================================= By default the GPU adds a black border around the video output to compensate for TVs which cut off part of the image. To disable this set this variable in local.conf: DISALE_OVERSCAN = "0" 2.E. Optional - Set overclocking options: ========================================= The Raspberry PI can be overclocked. As of now overclocking up to the "Turbo Mode" is officially supported by the raspbery and does not void warranty. Check the config.txt for a detailed description of options and modes. Example: # Turbo mode ARM_FREQ = "1000" CORE_FREQ = "500" SDRAM_FREQ = "500" OVER_VOLTAGE = "6" 2.F. Optional - Video camera support with V4L2 drivers ====================================================== Set this variable to enable support for the video camera (Linux 3.12.4+ required) VIDEO_CAMERA = "1" 2.G. Images =========== * rpi-hwup-image Hardware up image * rpi-basic-image Based on rpi-hwup-image with some added features (ex: splash) * rpi-test-image Image based on rpi-basic-image which includes most of the packages in this layer and some media samples. 2.H. Boot to U-Boot =================== To have u-boot load kernel image, set in your local.conf KERNEL_IMAGETYPE = "uImage" This will make kernel.img be u-boot image which will load uImage. By default, kernel.img is the actual kernel image (ex. Image). 2.I. Image with Initramfs ========================= To build an initramfs image : * Set this 3 kernel variables (in linux-raspberrypi.inc for example) - kernel_configure_variable BLK_DEV_INITRD y - kernel_configure_variable INITRAMFS_SOURCE "" - kernel_configure_variable RD_GZIP y * Set the yocto variables (in linux-raspberrypi.inc for example) - INITRAMFS_IMAGE = "" - INITRAMFS_IMAGE_BUNDLE = "1" * Set the meta-rasberrypi variable (in raspberrypi.conf for example) - KERNEL_INITRAMFS = "-initramfs" 3. Extra apps ============= 3.A. omxplayer ============== omxplayer depends on libav which has a commercial license. So in order to be able to compile omxplayer you will need to whiteflag the commercial license adding to you local.conf: LICENSE_FLAGS_WHITELIST = "commercial" 4. Source code and mirrors ========================== Main repo: git://git.yoctoproject.org/meta-raspberrypi http://git.yoctoproject.org/git/meta-raspberrypi Github mirror: https://github.com/djwillis/meta-raspberrypi Gerrit review repo: https://review.gherzan.ro:8443/meta-raspberrypi 5. Contributing =============== 5.A. Mailing list ================= To contribute to this layer you should send the patches for review to the mailing list. The patches should be compliant with the openembedded patch guidelines: http://www.openembedded.org/wiki/Commit_Patch_Message_Guidelines Mailing list: https://lists.yoctoproject.org/listinfo/yocto To send changes to mailing list use something like: git send-email --to yocto@yoctoproject.org \ --subject-prefix='meta-raspberrypi][PATCH' OPTIONALLY push changes to gerrit (help maintainers merge and review patches easier in this way). git push ssh://@review.gherzan.ro:29418/meta-raspberrypi :refs/for/master See 5.B. Gerrit Review Server. 5.B. Gerrit Review Server ========================= We have a gerrit server configured at review.gherzan.ro. Changes made in gerrit are merged in git.yoctoproject.org/meta-raspberrypi. You can setup a gerrit account in less than 2 minutes: A) Login / Register on https://review.gherzan.ro:8443. B) Add your PUBLIC key in Settings/SSH Public Keys. C) Add remote in your local repo: git remote add gherzan ssh://@review.gherzan.ro:29418/meta-raspberrypi D) Push changes to gerrit using: git push gherzan :refs/for/master Please check your spam folder for gerrit messages. Sometimes they end up there. 5.C. Trello Board ================= A public Trello board is set to manage tasks and bugs. Join us there: https://trello.com/b/QsYeVjVe/meta-raspberrypi 6. Maintainers ============== John Willis Andrei Gherzan