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authorVincent ABRIOU <vincent.abriou@st.com>2016-09-12 05:47:27 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-03-03 07:16:11 -0300
commit8ecc54138aa1fc1be10bac7890248a0c00065427 (patch)
tree64b405917f3523157373e3de0034998c7983107b /Documentation/media
parent93d4a26c3dabcee4d8bd6c9a1aba779484dc3cc3 (diff)
[media] vivid: support for contiguous DMA buffers
It allows to simulate the behavior of hardware with such limitations or to connect vivid to real hardware with such limitations. Add the "allocators" module parameter option to let vivid use the dma-contig instead of vmalloc. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Vincent Abriou <vincent.abriou@st.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media')
-rw-r--r--Documentation/media/v4l-drivers/vivid.rst8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/media/v4l-drivers/vivid.rst b/Documentation/media/v4l-drivers/vivid.rst
index c8cf371e8bb9..3e44b2217f2d 100644
--- a/Documentation/media/v4l-drivers/vivid.rst
+++ b/Documentation/media/v4l-drivers/vivid.rst
@@ -263,6 +263,14 @@ all configurable using the following module options:
removed. Unless overridden by ccs_cap_mode and/or ccs_out_mode the
will default to enabling crop, compose and scaling.
+- allocators:
+
+ memory allocator selection, default is 0. It specifies the way buffers
+ will be allocated.
+
+ - 0: vmalloc
+ - 1: dma-contig
+
Taken together, all these module options allow you to precisely customize
the driver behavior and test your application with all sorts of permutations.
It is also very suitable to emulate hardware that is not yet available, e.g.