Searched hist:"4 a2e0a806cb58a4d3106add079488e0b56a221b6" (Results 1 – 3 of 3) sorted by relevance
| /linux/drivers/media/test-drivers/vimc/ |
| H A D | Kconfig | diff 4a2e0a806cb58a4d3106add079488e0b56a221b6 Fri Jul 30 15:18:29 CEST 2021 Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> media: vimc: Add support for contiguous DMA buffers
The vimc driver is used for testing purpose, and some test use cases
involve sharing buffers with a consumer device. Consumers often require
DMA contiguous memory, which vimc doesn't currently support. This leads
in the best case to usage of bounce buffers, which is very slow, and in
the worst case in a complete failure.
Add support for the dma-contig allocator in vimc to support those use
cases properly. The allocator is selected through a new "allocator"
module parameter, which defaults to vmalloc.
[hverkuil: add missing 'select VIDEOBUF2_DMA_CONFIG' to Kconfig]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
|
| H A D | vimc-common.h | diff 4a2e0a806cb58a4d3106add079488e0b56a221b6 Fri Jul 30 15:18:29 CEST 2021 Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> media: vimc: Add support for contiguous DMA buffers
The vimc driver is used for testing purpose, and some test use cases
involve sharing buffers with a consumer device. Consumers often require
DMA contiguous memory, which vimc doesn't currently support. This leads
in the best case to usage of bounce buffers, which is very slow, and in
the worst case in a complete failure.
Add support for the dma-contig allocator in vimc to support those use
cases properly. The allocator is selected through a new "allocator"
module parameter, which defaults to vmalloc.
[hverkuil: add missing 'select VIDEOBUF2_DMA_CONFIG' to Kconfig]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
|
| /linux/Documentation/admin-guide/media/ |
| H A D | vimc.rst | diff 4a2e0a806cb58a4d3106add079488e0b56a221b6 Fri Jul 30 15:18:29 CEST 2021 Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> media: vimc: Add support for contiguous DMA buffers
The vimc driver is used for testing purpose, and some test use cases
involve sharing buffers with a consumer device. Consumers often require
DMA contiguous memory, which vimc doesn't currently support. This leads
in the best case to usage of bounce buffers, which is very slow, and in
the worst case in a complete failure.
Add support for the dma-contig allocator in vimc to support those use
cases properly. The allocator is selected through a new "allocator"
module parameter, which defaults to vmalloc.
[hverkuil: add missing 'select VIDEOBUF2_DMA_CONFIG' to Kconfig]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
|