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
..
b2c2	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
saa7146	media: media/pci: don't set description for ENUM_FMT	2019-07-22 14:40:32 -04:00
siano	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 185	2019-05-30 11:29:20 -07:00
v4l2-tpg	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
videobuf2	media: vb2-dc: skip CPU sync in map/unmap dma_buf	2019-07-23 11:46:27 -04:00
btcx-risc.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cx2341x.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
cypress_firmware.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
cypress_firmware.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
tveeprom.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00