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| author |   Dillon Min <dillon.minfei@gmail.com> | 2021-10-19 09:43:18 +0100 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-11-15 08:11:31 +0000 |
| commit | 0a08088f82c2db9cd6bce3258c79a76980c77651 (patch) | |
| tree | 8c8c593db26d3e6ba29372eb3133b487e2000d28 /include/media | |
| parent | media: dt-bindings: media: add document for STM32 DMA2d bindings (diff) | |
| download | linux-dev-0a08088f82c2db9cd6bce3258c79a76980c77651.tar.xz linux-dev-0a08088f82c2db9cd6bce3258c79a76980c77651.zip | |
media: v4l2-mem2mem: add v4l2_m2m_get_unmapped_area for no-mmu platform
For platforms without MMU the m2m provides a helper method
v4l2_m2m_get_unmapped_area(), The mmap() routines will call
this to get a proposed address for the mapping.
More detailed information about get_unmapped_area can be found in
Documentation/nommu-mmap.txt
Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-mem2mem.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h index 5a91b548ecc0..fdbd5257e020 100644 --- a/include/media/v4l2-mem2mem.h +++ b/include/media/v4l2-mem2mem.h @@ -495,6 +495,11 @@ __poll_t v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct vm_area_struct *vma); +#ifndef CONFIG_MMU +unsigned long v4l2_m2m_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); +#endif /** * v4l2_m2m_init() - initialize per-driver m2m data * |