Messages in this thread | | | From | Linus Walleij <> | Subject | PrimeCell generic DMA v10 | Date | Wed, 1 Sep 2010 17:24:18 +0200 |
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This is the tenth iteration of this patchset...
Now DMA is working nicely on the following platforms and PrimeCells:
- U300 PL011, PL022, PL180 - U8500 PL011, PL022, PL180 - RealView PB11MPCore PL011, PL022
PL180 (MMC) is not working with the MMC and DMA, I haven't drilled into why, could be some FIFO overflow or similar. I think DMA could actually be activated for all the RealViews with a working DMA controller (EB, PB11MPCore, PBA8 and PBX) but since I cannot test them I left them out of the patch set.
I ran some serious stress tests on the PB11MPCore, with two threads submitting DMA memcpy jobs while making transfers on PL011 and PL022 simultaneously, no problems.
I read up on DMA-API and proofread all three drivers with that in mind, but I cannot find any more misuses of the API. (The latest unecessary sync call in PL022 that Russell found is removed.)
The compilation problem Grant saw on the PL022 driver I have *still* not been able to reproduce so I am in the blue on this one. It compiles nicely for U300, U8500 and RealView. I need help if there is still problems with this.
Yours, Linus Walleij
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