Unlike when resolution change on keyframes, dynamic resolution change on inter frames doesn't allow to do a stream off/on sequence because it is need to keep all previous references alive to decode inter frames. This constraint have two main problems: - more memory consumption. - more buffers in use. To solve these issue this series introduce DELETE_BUFS ioctl and remove the 32 buffers limit per queue. VP9 conformance tests using fluster give a score of 210/305. The 24 resize inter tests (vp90-2-21-resize_inter_* files) are ok but require to use postprocessor. Kernel branch is available here: https://gitlab.collabora.com/benjamin.gaignard/for-upstream/-/commits/remove_vb2_queue_limit_v6 GStreamer branch to use DELETE_BUF ioctl and testing dynamic resolution change is here: https://gitlab.freedesktop.org/benjamin.gaignard1/gstreamer/-/commits/VP9_drc changes in version 6: - Get a patch per driver to use vb2_get_buffer() instead of directly access to queue buffers array. - Add lock in vb2_core_delete_buf() - Use vb2_buffer instead of index - Fix various comments - Change buffer index name to BUFFER_INDEX_MASK - Stop spamming kernel log with unbalanced counters changes in version 5: - Rework offset cookie encoding pattern is n ow the first patch of the serie. - Use static array instead of allocated one for postprocessor buffers. changes in version 4: - Stop using Xarray, instead let queues decide about their own maximum number of buffer and allocate bufs array given that value. - Rework offset cookie encoding pattern. - Change DELETE_BUF to DELETE_BUFS because it now usable for range of buffer to be symetrical of CREATE_BUFS. - Add fixes tags on couple of Verisilicon related patches. - Be smarter in Verisilicon postprocessor buffers management. - Rebase on top of v6.4 changes in version 3: - Use Xarray API to store allocated video buffers. - No module parameter to limit the number of buffer per queue. - Use Xarray inside Verisilicon driver to store postprocessor buffers and remove VB2_MAX_FRAME limit. - Allow Versilicon driver to change of resolution while streaming - Various fixes the Verisilicon VP9 code to improve fluster score. changes in version 2: - Use a dynamic array and not a list to keep trace of allocated buffers. Not use IDR interface because it is marked as deprecated in kernel documentation. - Add a module parameter to limit the number of buffer per queue. - Add DELETE_BUF ioctl and m2m helpers. Regards, Benjamin Benjamin Gaignard (18): media: videobuf2: Rework offset 'cookie' encoding pattern media: videobuf2: Stop spamming kernel log with all queue counter media: videobuf2: Use vb2_buffer instead of index media: amphion: Use vb2_get_buffer() instead of directly access to buffers array media: mediatek: jpeg: Use vb2_get_buffer() instead of directly access to buffers array media: mediatek: vdec: Use vb2_get_buffer() instead of directly access to buffers array media: sti: hva: Use vb2_get_buffer() instead of directly access to buffers array media: visl: Use vb2_get_buffer() instead of directly access to buffers array media: atomisp: Use vb2_get_buffer() instead of directly access to buffers array media: videobuf2: Access vb2_queue bufs array through helper functions media: videobuf2: Be more flexible on the number of queue stored buffers media: verisilicon: Refactor postprocessor to store more buffers media: verisilicon: Store chroma and motion vectors offset media: verisilicon: vp9: Use destination buffer height to compute chroma offset media: verisilicon: postproc: Fix down scale test media: verisilicon: vp9: Allow to change resolution while streaming media: v4l2: Add DELETE_BUFS ioctl media: v4l2: Add mem2mem helpers for DELETE_BUFS ioctl .../userspace-api/media/v4l/user-func.rst | 1 + .../media/v4l/vidioc-delete-bufs.rst | 73 ++++ .../media/common/videobuf2/videobuf2-core.c | 379 ++++++++++++------ .../media/common/videobuf2/videobuf2-v4l2.c | 99 ++++- drivers/media/dvb-core/dvb_vb2.c | 6 +- drivers/media/platform/amphion/vpu_dbg.c | 22 +- .../platform/mediatek/jpeg/mtk_jpeg_core.c | 6 +- .../vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 2 +- drivers/media/platform/st/sti/hva/hva-v4l2.c | 4 + drivers/media/platform/verisilicon/hantro.h | 9 +- .../media/platform/verisilicon/hantro_drv.c | 4 +- .../platform/verisilicon/hantro_g2_vp9_dec.c | 10 +- .../media/platform/verisilicon/hantro_hw.h | 4 +- .../platform/verisilicon/hantro_postproc.c | 95 ++++- .../media/platform/verisilicon/hantro_v4l2.c | 27 +- drivers/media/test-drivers/vim2m.c | 1 + drivers/media/test-drivers/visl/visl-dec.c | 28 +- drivers/media/v4l2-core/v4l2-dev.c | 1 + drivers/media/v4l2-core/v4l2-ioctl.c | 17 + drivers/media/v4l2-core/v4l2-mem2mem.c | 20 + .../staging/media/atomisp/pci/atomisp_ioctl.c | 2 +- include/media/v4l2-ioctl.h | 4 + include/media/v4l2-mem2mem.h | 12 + include/media/videobuf2-core.h | 29 +- include/media/videobuf2-v4l2.h | 11 + include/uapi/linux/videodev2.h | 16 + 26 files changed, 664 insertions(+), 218 deletions(-) create mode 100644 Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst -- 2.39.2
