Lucas Stach 596a5a58e8 media: vb2-dc: skip CPU sync in map/unmap dma_buf ... This is rougly equivalent to ca0e68e21a (drm/prime: skip CPU sync in map/unmap dma_buf). The contig memory allocated is already device coherent memory, so there is no point in doing a CPU sync when mapping it to another device. Also most importers currently cache the mapping so the CPU sync would only happen on the first import, so we are better off with not pretending to do a cache synchronization at all. This gets rid of a lot of CPU overhead in uses where those dma-bufs are regularily imported and detached again, like Weston is currently doing in the DRM compositor. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> [hverkuil-cisco@xs4all.nl: fix checkpatch warnings] Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>		2019-07-23 11:46:27 -04:00
..
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	media: vb2: Makefile: place vb2-trace together with vb2-core	2018-02-26 11:39:04 -05:00
vb2-trace.c	media: videobuf2: fix build issues with vb2-trace	2018-02-23 05:13:53 -05:00
videobuf2-core.c	media: videobuf2-core.h: Document the alloc memop size argument as page aligned	2019-05-23 10:18:19 -04:00
videobuf2-dma-contig.c	media: vb2-dc: skip CPU sync in map/unmap dma_buf	2019-07-23 11:46:27 -04:00
videobuf2-dma-sg.c	media: videobuf2-vmalloc: get_userptr: buffers are always writable	2019-05-29 08:05:58 -04:00
videobuf2-dvb.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
videobuf2-memops.c	media: videobuf2-vmalloc: get_userptr: buffers are always writable	2019-05-29 08:05:58 -04:00
videobuf2-v4l2.c	media: vb2: reorder checks in vb2_poll()	2019-07-23 08:44:45 -04:00
videobuf2-vmalloc.c	media: videobuf2-vmalloc: get_userptr: buffers are always writable	2019-05-29 08:05:58 -04:00