In this How-to we will try to build kernel for Beaglebone that will support our LVDS cape.<\/p>\n
Download and install all required sources: <\/p>\n
\r\nsudo apt-get install gcc-arm-linux-gnueabi git ccache libncurses5-dev u-boot-tools lzma\r\ncd ~\r\ngit clone git:\/\/git.kernel.org\/pub\/scm\/linux\/kernel\/git\/stable\/linux-stable.git\r\ngit clone git:\/\/github.com\/RobertCNelson\/linux-dev.git\r\ncd linux-dev\r\ngit checkout origin\/am33x-v3.2 -b am33x-v3.2\r\ncp system.sh.sample system.sh\r\n<\/pre>\nThen make the following changes in system.sh:
\n– uncomment line CC=arm-linux-gnueabi-
\n– uncomment line LINUX_GIT=~\/linux-stable\/
\n– uncomment line ZRELADDR=0x80008000
\n– uncomment line BUILD_UIMAGE=1
\n– uncomment and change line MMC=\/dev\/sde to your SD card system name (mine is \/dev\/sdb)<\/p>\nNext commands:<\/p>\n
\r\n.\/build_kernel.sh\r\n<\/pre>\nwill bring you directly to kernel config GUI, and then will assemble it.<\/p>\n
After kernel is compiled, please make changes to file ~\/linux-dev\/KERNEL\/arch\/arm\/mach-omap2\/board-am335xevm.c<\/b> (see below), then recompile kernel again (command “tools\/rebuild.sh”). Once the build had completed there will be a uImage file in ~\/linux-dev\/deploy<\/b>. You can install this to your SD card with:<\/p>\n
\r\n.\/tools\/load_uImage.sh\r\n<\/pre>\nBuilt kernel modules are located in ~\/linux-dev\/deploy\/mod\/lib<\/b><\/p>\n
To add support for our LVDS cape you need to patch file board-am335xevm.c<\/b> located in \/kernel\/arch\/arm\/mach-omap2<\/b>. You should find function beaglebone_cape_setup(struct
\nmemory_accessor *mem_acc, void *context)<\/b> in this file and change it to always invoke function dvi_init(0,0)<\/b>. The easiest way is to put
\nthe following lines:<\/p>\n\r\npr_info(\"BeagleBone cape: initializing DVI cape\\n\");\r\ndvi_init(0,0);\r\nreturn;\r\n<\/pre>\nat the beginning of function.<\/p>\n","protected":false},"excerpt":{"rendered":"
In this How-to we will try to build kernel for Beaglebone that will support our LVDS cape. Download and install all required sources: Then make the following changes in system.sh: – uncomment line CC=arm-linux-gnueabi- – uncomment line LINUX_GIT=~\/linux-stable\/ – uncomment line ZRELADDR=0x80008000 – uncomment line BUILD_UIMAGE=1 – uncomment and change line MMC=\/dev\/sde to your SD […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-1605","post","type-post","status-publish","format-standard","hentry","category-howto"],"_links":{"self":[{"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=\/wp\/v2\/posts\/1605","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1605"}],"version-history":[{"count":6,"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=\/wp\/v2\/posts\/1605\/revisions"}],"predecessor-version":[{"id":1610,"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=\/wp\/v2\/posts\/1605\/revisions\/1610"}],"wp:attachment":[{"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1605"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1605"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chalk-elec.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}