Hi, On Mon, Oct 4, 2010 at 6:59 PM, Ramirez Luna, Omar <omar.ramirez@xxxxxx> wrote: > Felipe Contreras wrote: >> I was trying the iommu patches but I noticed the tidspbridge driver >> doesn't work at all, I found two critical issues: >> >> First, the platform device is missing, so there's no way the driver >> can work. It seems to have been dropped from the migration to staging >> which happened some time ago... I would have expected somebody to >> notice a thing like this. I already have patches that fix this. > > Yes this is missing from beginning, I seeked advice on whether to send a patch for this or not, and since it would be touching mach dependent files it would be out of the scope of staging tree, however if needed: > > http://dev.omapzoom.org/?p=tidspbridge/kernel-dspbridge.git;a=commit;h=4dcb41d484653d162b2bc6e1bf226c2dad0b953c > > This was meant to placed under dspbridge wiki, I still have to do that one. This seems to be worth mentioning in the TODO file: * Make it actually work Anyway, first, I think I tried a version similar to that one, and doesn't apply on mainline any more, also, bootmem doesn't seem to be working on ARM either, so I had to move to memblock, and third, I don't think that platform device is correct since it depends on the headers of a driver. My version is basically the same, but using memblock, and stands on it's own. Even if tidspbridge wasn't in staging I think this could go to mainline, plus, perhaps other implementations like dsp-link could make use of it (who knows): http://article.gmane.org/gmane.linux.kernel/1044209 >> And second, since 2.6.35, ioremap() doesn't work on RAM, so this >> driver cannot work anymore unless 309caa9 is reverted. I am reserving >> the memory with memblock, but it still fails the ioremap(), and >> __va() doesn't seem to work (don't know why). > > Yes that's true, so far the only solution I have seen is to move the allocation on memory outside kernel control, I believe framebuffer has the same problem, but I haven't contacted them to see if we can align on a common solution. At least on my N900 the framebuffer is not working either, and I've heard the same on beagleboard. Maybe something like this: http://article.gmane.org/gmane.linux.kernel.mm/52757 >> Has anyone tried the driver on 2.6.36-rcX? > > Yes I have, I guess by applying your patches on top and reverting 309caa9. > I was rebasing your mailbox hwmod patches but seems something has changed since they don't work, I was trying to write my own version. You should have said so, I'll try to rebase myself. Cheers. -- Felipe Contreras -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
