Tonight I built the linux-omap-dss2 repo (master branch) from gitorious.org and tried it.\u00a0 This is the repo from the guy working on the OMAP DSS2 support in the kernel.\u00a0 And viola!\u00a0 S-Video output is once again working!\u00a0 BeagleBox now defaults to mainline u-boot (2010.09, at least) an this branch of the linux-omap-dss2 repo.<\/p>\n
S-Video support is working but not perfect.\u00a0 Setting the mode to “ntsc” for my US TV is the only mode setting I could get to work.\u00a0 It has color ouput – the Tux logo is in color in the upper left corner – but there is terrible flicker.\u00a0 The flicker eventually causes the TV to give up and go to a blue screen though the board is still running.\u00a0 If I try to use another mode the DSS2 code defaults to PAL which removes the flicker (nice clear display) but no color.\u00a0 I will note that the output from S-Video is actually a bit better (higher contrast, easier to read the text, and color added) than with the validation images which use DSS1.\u00a0 I don’t have the rootfs setup to run mplayer and play a video yet.\u00a0 I’ll get to that later.<\/p>\n
Both PAL and NTSC have overscan issues so I can’t see the login prompt on the TV.\u00a0 I believe I can adjust this at runtime by writing a program to use DSS2 ioctls to adjust the overlay size.\u00a0 But I think the flicker issue may require a boot time mode setting because (apparently) all TVs are different.\u00a0 I’ll probably have to write to the developer (or try to find the linux-omap mailing list) about this.<\/p>\n
Note that I tried this with the kernel configured both with and without the dependency on u-boot initialization of the displays.\u00a0 There was no apparent change in behavior with either setting.\u00a0 I’ve defaulted to not depending on u-boot initialization of the displays.<\/p>\n
In any case, BeagleBox now has a mainline infrastructure upon which the rest of the software stack can be built.\u00a0 It’s a happy day.<\/p>\n","protected":false},"excerpt":{"rendered":"
Tonight I built the linux-omap-dss2 repo (master branch) from gitorious.org and tried it.\u00a0 This is the repo from the guy working on the OMAP DSS2 support in the kernel.\u00a0 And viola!\u00a0 S-Video output is once again working!\u00a0 BeagleBox now defaults to mainline u-boot (2010.09, at least) an this branch of the linux-omap-dss2 repo. S-Video support […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[390,8,5,6],"tags":[381,498,220,444,252,439,495,625],"class_list":{"0":"post-806","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-beaglebox-hardware","7":"category-hardware","8":"category-linux","9":"category-software-development","10":"tag-beaglebox","11":"tag-dss2","12":"tag-mplayer","13":"tag-ntsc","14":"tag-omap","15":"tag-s-video","16":"tag-tv-out","17":"tag-video","18":"czr-hentry"},"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pe9t8-d0","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/806","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=806"}],"version-history":[{"count":1,"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/806\/revisions"}],"predecessor-version":[{"id":807,"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/806\/revisions\/807"}],"wp:attachment":[{"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.graphics-muse.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}