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acf9b67067
Add a MAPPABLE data flag that hints that the fd in the data is mappable with a simple mmap/munmap. Normally, DmaBuf is not mappable like that unless explicitly indicated with this flag. Set the MAPPABLE flag on the DmaBuf from v4l2 and libcamera fd. When asked, mmap the buffer memory in all cases when the MAPPABLE flag is set. This solves the case where v4l2 has exported DmaBuf and is streaming to node A and then node B links but doesn't get automatically mmaped memory. Fixes #3840 |
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