>From the commit log of the patch: -------------------------------------------------------------------- The patch partially reverts some of the UAPI bits of the buffer cache management hints. Namely, the queue consistency (memory coherency) user-space hint because, as it turned out, the kernel implementation of this feature was misusing DMA_ATTR_NON_CONSISTENT. The patch revers both kernel and user space parts: removes the DMA consistency attr functions, rolls back changes to v4l2_requestbuffers, v4l2_create_buffers structures and corresponding UAPI functions (plus compat32 layer) and cleans up the documentation. -------------------------------------------------------------------- The intention is that this feature will return once proper low-level support for this has been sorted. A patch to revert the v4l-utils changes is ready to be merged once this patch made it's way to our master branch: https://patchwork.linuxtv.org/project/linux-media/patch/20200911030952.74468-1-sergey.senozhatsky@xxxxxxxxx/ I've tested this with the test-media script. Regards, Hans The following changes since commit 93c16fabdb74a9c1a427402fc1fe588a45130c5b: media: ov8856: Add support for 3264x2448 mode (2020-09-10 14:29:35 +0200) are available in the Git repository at: git://linuxtv.org/hverkuil/media_tree.git tags/br-v5.9-mem for you to fetch changes up to d36642b40255022dda1cfcaebe82e40a592d4ee8: media/v4l2: remove V4L2_FLAG_MEMORY_NON_CONSISTENT flag (2020-09-11 12:26:54 +0200) ---------------------------------------------------------------- Tag branch ---------------------------------------------------------------- Sergey Senozhatsky (1): media/v4l2: remove V4L2_FLAG_MEMORY_NON_CONSISTENT flag Documentation/userspace-api/media/v4l/buffer.rst | 17 ----------------- Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst | 6 +----- Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst | 12 ++---------- drivers/media/common/videobuf2/videobuf2-core.c | 46 ++++++---------------------------------------- drivers/media/common/videobuf2/videobuf2-dma-contig.c | 19 ------------------- drivers/media/common/videobuf2/videobuf2-dma-sg.c | 3 +-- drivers/media/common/videobuf2/videobuf2-v4l2.c | 18 ++---------------- drivers/media/dvb-core/dvb_vb2.c | 2 +- drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 10 ++-------- drivers/media/v4l2-core/v4l2-ioctl.c | 5 ++++- include/media/videobuf2-core.h | 7 ++----- include/uapi/linux/videodev2.h | 13 ++----------- 12 files changed, 23 insertions(+), 135 deletions(-)
