Hi Devin, thank you for your answer. On 2 November 2011 17:12, Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx> wrote: > I've actually got a very similar issue and have been looking into it > (an em28xx device on OMAP requiring contiguous physical memory for the > hardware H.264 encoder). One thing you may definitely want to check > out is the patch sent earlier today with subject: My case is a i.MX27 SoC with its internal H.264 encoder. > [PATCH] media: vb2: vmalloc-based allocator user pointer handling > > While that patch is intended for videobuf2, you might be able to copy > the core logic into videobuf-vmalloc. I've seen a recent patch by Laurent Pinchart which provides vb2 support for UVC driver. It might also help: [PATCH 2/2] uvcvideo: Use videobuf2-vmalloc > There are other drivers which use USERPTR provided buffers (which are > allocated as contiguous memory from userland [i.e. vfpe_capture > accepting buffers from cmemk on the OMAP platform]), but they > typically do DMA so it's not really useful as an example where you > have a USB based device. > > If you get it working, by all means send the code to the ML so others > can benefit. Sure, though I will need some help because it seems some related frameworks are not ready for what we want to achieve. -- Javier Martin Vista Silicon S.L. CDTUC - FASE C - Oficina S-345 Avda de los Castros s/n 39005- Santander. Cantabria. Spain +34 942 25 32 60 www.vista-silicon.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
