On Fri, 2008-05-09 at 11:07 +0200, Vladimir Pantelic wrote: > steven.zhang wrote: > > Hi, all. > > I am working on Frame buffer driver to support for HD output. > > Take 720p resolution as example: > > it will need up to 1280*720*16/8 * 3 (5M) memory to buffer. > > using dma_alloc_coherent() to allocate 5M memory will fail, > > thus, I try to reserve the FB buffer on system boot.What I do is just > > pass a fix physical address such as 0xF000000 to mem_alloc(), then > > nothing changed except that set u-boot to mem=120M. > > > > But nothing output when kernel is up.I don't know where is wrong. > > does this fixed allocation work with your SD fb? now you are trying two > things > at the same time, I would verify first that your fixed allocation works with > the > SD fb, the go HD. > yes, I would make SD fb work first for fixed allocation, then move into HD would be easy. _______________________________________________ > Davinci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
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