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_v8 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 8: - Add V4L2_BUF_CAP_SUPPORTS_SET_MAX_BUFS and new 'max_buffers' field in v4l2_create_buffers structure to report the maximum number of buffers that a queue could allocate. - Add V4L2_BUF_CAP_SUPPORTS_DELETE_BUFS to indicate that a queue support DELETE_BUFS ioctl. - Make some test drivers use more than 32 buffers and DELETE_BUFS ioctl. - Fix remarks done by Hans - Move "media: core: Rework how create_buf index returned value is computed" patch to the top of the serie. changes in version 7: - Use a bitmap to know which entries are valid in queue bufs array. The number of buffers in the queue could must calculated from the bitmap so num_buffers becomes useless. This led to add quite few patches to remove it from all the drivers. Note: despiste my attention I may have miss some calls to num_buffers... - Split patches to make them more readable. - Run v4l2-compliance with additional delete-bufs tests. - Run ./test-media -kmemleak vivid and no more failures. Note: I had to remove USERPTR streaming test because they to much frequentely hit get_framevec bug. It is not related to my series since this happens all the time on master branch. - Fix Hans remarks on v6 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 (53): 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: Remove useless loop 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: dvb-core: 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: Report the maximum possible number of buffers for the queue media: test-drivers: vivid: Increase max supported buffers for capture queues media: test-drivers: vicodec: Increase max supported capture queue buffers media: verisilicon: Refactor postprocessor to store more buffers media: verisilicon: Store chroma and motion vectors offset media: verisilicon: g2: Use common helpers to compute chroma and mv offsets media: verisilicon: vp9: Allow to change resolution while streaming media: Remove duplicated index vs q->num_buffers check media: core: Add helper to get queue number of buffers media: dvb-core: Do not initialize twice queue num_buffer field media: dvb-frontends: rtl2832_srd: Use queue min_buffers_needed field media: video-i2c: Set min_buffers_needed to 2 media: pci: cx18: Set correct value to min_buffers_needed field media: pci: dt3155: Remove useless check media: pci: netup_unidvb: Remove useless number of buffers check media: pci: tw68: Stop direct calls to queue num_buffers field media: pci: tw686x: Set min_buffers_needed to 3 media: amphion: Stop direct calls to queue num_buffers field media: coda: Stop direct calls to queue num_buffers field media: mediatek: vcodec: Stop direct calls to queue num_buffers field media: nxp: Stop direct calls to queue num_buffers field media: renesas: Set min_buffers_needed to 16 media: ti: Use queue min_buffers_needed field to set the min number of buffers media: verisilicon: Stop direct calls to queue num_buffers field media: test-drivers: Stop direct calls to queue num_buffers field media: usb: airspy: Set min_buffers_needed to 8 media: usb: cx231xx: Set min_buffers_needed to CX231XX_MIN_BUF media: usb: hackrf: Set min_buffers_needed to 8 media: usb: usbtv: Set min_buffers_needed to 2 media: atomisp: Stop direct calls to queue num_buffers field media: imx: Stop direct calls to queue num_buffers field media: meson: vdec: Stop direct calls to queue num_buffers field touchscreen: sur40: Stop direct calls to queue num_buffers field sample: v4l: Stop direct calls to queue num_buffers field media: cedrus: Stop direct calls to queue num_buffers field media: core: Rework how create_buf index returned value is computed media: core: Add bitmap manage bufs array entries media: core: Free range of buffers media: v4l2: Add DELETE_BUFS ioctl media: v4l2: Add mem2mem helpers for DELETE_BUFS ioctl media: test-drivers: Use helper for DELETE_BUFS ioctl .../userspace-api/media/v4l/user-func.rst | 1 + .../media/v4l/vidioc-create-bufs.rst | 8 +- .../media/v4l/vidioc-delete-bufs.rst | 80 +++ .../media/v4l/vidioc-reqbufs.rst | 2 + drivers/input/touchscreen/sur40.c | 5 +- .../media/common/videobuf2/videobuf2-core.c | 556 +++++++++++------- .../media/common/videobuf2/videobuf2-v4l2.c | 121 +++- drivers/media/dvb-core/dvb_vb2.c | 17 +- drivers/media/dvb-frontends/rtl2832_sdr.c | 9 +- drivers/media/i2c/video-i2c.c | 5 +- drivers/media/pci/cx18/cx18-streams.c | 13 +- drivers/media/pci/dt3155/dt3155.c | 2 - .../pci/netup_unidvb/netup_unidvb_core.c | 4 +- drivers/media/pci/tw68/tw68-video.c | 6 +- drivers/media/pci/tw686x/tw686x-video.c | 13 +- drivers/media/platform/amphion/vpu_dbg.c | 30 +- drivers/media/platform/amphion/vpu_v4l2.c | 4 +- .../media/platform/chips-media/coda-common.c | 2 +- .../platform/mediatek/jpeg/mtk_jpeg_core.c | 7 +- .../vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 9 +- .../mediatek/vcodec/encoder/mtk_vcodec_enc.c | 2 +- drivers/media/platform/nxp/imx7-media-csi.c | 7 +- drivers/media/platform/renesas/rcar_drif.c | 8 +- drivers/media/platform/st/sti/hva/hva-v4l2.c | 9 +- .../media/platform/ti/am437x/am437x-vpfe.c | 7 +- drivers/media/platform/ti/cal/cal-video.c | 5 +- .../media/platform/ti/davinci/vpif_capture.c | 5 +- .../media/platform/ti/davinci/vpif_display.c | 5 +- drivers/media/platform/ti/omap/omap_vout.c | 5 +- drivers/media/platform/verisilicon/hantro.h | 9 +- .../media/platform/verisilicon/hantro_drv.c | 5 +- .../media/platform/verisilicon/hantro_g2.c | 14 + .../platform/verisilicon/hantro_g2_hevc_dec.c | 18 +- .../platform/verisilicon/hantro_g2_vp9_dec.c | 28 +- .../media/platform/verisilicon/hantro_hw.h | 7 +- .../platform/verisilicon/hantro_postproc.c | 93 ++- .../media/platform/verisilicon/hantro_v4l2.c | 27 +- .../media/test-drivers/vicodec/vicodec-core.c | 3 + drivers/media/test-drivers/vim2m.c | 2 + .../media/test-drivers/vimc/vimc-capture.c | 2 + drivers/media/test-drivers/visl/visl-dec.c | 32 +- drivers/media/test-drivers/visl/visl-video.c | 2 + drivers/media/test-drivers/vivid/vivid-core.c | 14 + .../media/test-drivers/vivid/vivid-meta-cap.c | 3 - .../media/test-drivers/vivid/vivid-meta-out.c | 5 +- .../test-drivers/vivid/vivid-touch-cap.c | 5 +- .../media/test-drivers/vivid/vivid-vbi-cap.c | 5 +- .../media/test-drivers/vivid/vivid-vbi-out.c | 5 +- .../media/test-drivers/vivid/vivid-vid-cap.c | 5 +- .../media/test-drivers/vivid/vivid-vid-out.c | 5 +- drivers/media/usb/airspy/airspy.c | 9 +- drivers/media/usb/cx231xx/cx231xx-417.c | 4 +- drivers/media/usb/cx231xx/cx231xx-video.c | 4 +- drivers/media/usb/hackrf/hackrf.c | 9 +- drivers/media/usb/usbtv/usbtv-video.c | 3 +- drivers/media/v4l2-core/v4l2-dev.c | 1 + drivers/media/v4l2-core/v4l2-ioctl.c | 21 +- drivers/media/v4l2-core/v4l2-mem2mem.c | 20 + .../staging/media/atomisp/pci/atomisp_ioctl.c | 4 +- drivers/staging/media/imx/imx-media-capture.c | 7 +- drivers/staging/media/meson/vdec/vdec.c | 13 +- .../staging/media/sunxi/cedrus/cedrus_h264.c | 8 +- .../staging/media/sunxi/cedrus/cedrus_h265.c | 9 +- include/media/v4l2-ioctl.h | 4 + include/media/v4l2-mem2mem.h | 12 + include/media/videobuf2-core.h | 65 +- include/media/videobuf2-v4l2.h | 13 + include/uapi/linux/videodev2.h | 24 +- samples/v4l/v4l2-pci-skeleton.c | 5 +- 69 files changed, 969 insertions(+), 502 deletions(-) create mode 100644 Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst -- 2.39.2
