Hallo This is absolutely correct. I made some experiments and solved part of problem with l4_cache_clean_data(). I putted it to refresh(int x, int y, int w, int h) (( os/src/server/nitpicker/genode/main.cc +441 )) and anytime, when i called nitpicker->frame buffer()->refresh() i got very good image. (But in my tests i used hardcoded pointer to data with pixels, because pixels[] inside np_test and local_addr was a different ) But, while i dragged image i got again noise on image. if i stopped (i guess refresh happend after stop) and i have again clear image. So, Norman, can You please put cache_clean_data to the right place inside nitpicker for flushing cache pixels on every pixels writing?
>> In our project we use Chestnut43 board for prototype. This board has 4.3” >> LCD 480x272 pixels. I get display configuration for this LCD from Linux >> driver. Display work, picture is drawing, colors are correct. But sometimes >> window drawn with distortion (normal drawing >> http://dl.dropbox.com/u/8558928/pic_1.jpg , distorted: >> http://dl.dropbox.com/u/8558928/pic_2.jpg >> http://dl.dropbox.com/u/8558928/pic_3.jpg ). I can’t solve this yet. Maybe >> I have wrong configuration for display controller. > > To me this looks like a typical cache artifact. The syscall bindings of > Fiasco.OC provide several functions for dealing with caches on ARM > platforms (i.e., see 'cache.h'). Those functions are unused by Genode > until now because we haven't experienced such artifacts with the PBXA9 > platform or Qemu. Maybe you could investigate if these cache-related > functions are relevant to your problem and if so, how they could be put > to use in a clean way within Genode? -- Sartakov A. Vasily ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Genode-main mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/genode-main
