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SubjectRe: [PATCH] WIP! media: uvcvideo: Use dma_alloc_noncontiguos API
On Wed, Nov 18, 2020 at 03:25:46PM +0100, Ricardo Ribalda wrote:
> On architectures where the is no coherent caching such as ARM use the
> dma_alloc_noncontiguos API and handle manually the cache flushing using
> dma_sync_single().
> With this patch on the affected architectures we can measure up to 20x
> performance improvement in uvc_video_copy_data_work().

This has a bunch of crazy long lines, but otherwise looks fine to me.

> Signed-off-by: Ricardo Ribalda <>
> ---
> This patch depends on dma_alloc_contiguous API1315351diffmboxseries

How do we want to proceed? Do the media maintainers want to pick up
that patch? Should I pick up the media patch in the dma-mapping tree?

Can you respost a combined series to get started?

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