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[v4,0/2] Allow non-coherent video capture buffers on Rockchip ISP V1

Message ID 20250303-b4-rkisp-noncoherent-v4-0-e32e843fb6ef@gmail.com (mailing list archive)
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Series Allow non-coherent video capture buffers on Rockchip ISP V1 | expand

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Mikhail Rudenko March 3, 2025, 11:40 a.m. UTC 
This small series adds support for non-coherent video capture buffers
on Rockchip ISP V1. Patch 1 fixes cache management for dmabuf's
allocated by dma-contig allocator. Patch 2 allows non-coherent
allocations on the rkisp1 capture queue. Some timing measurements are
provided in the commit message of patch 2.

Signed-off-by: Mikhail Rudenko <mike.rudenko@gmail.com>
---
Changes in v4:
- rebase to media/next
- use `direction` instead of `buf->dma_dir` in dma_sync_sgtable_*
- Link to v3: https://lore.kernel.org/r/20250128-b4-rkisp-noncoherent-v3-0-baf39c997d2a@gmail.com

Changes in v3:
- ignore skip_cache_sync_* flags in vb2_dc_dmabuf_ops_{begin,end}_cpu_access
- invalidate/flush kernel mappings as appropriate if they exist
- use dma_sync_sgtable_* instead of dma_sync_sg_*
- Link to v2: https://lore.kernel.org/r/20250115-b4-rkisp-noncoherent-v2-0-0853e1a24012@gmail.com

Changes in v2:
- Fix vb2_dc_dmabuf_ops_{begin,end}_cpu_access() for non-coherent buffers.
- Add cache management timing information to patch 2 commit message.
- Link to v1: https://lore.kernel.org/r/20250102-b4-rkisp-noncoherent-v1-1-bba164f7132c@gmail.com

---
Mikhail Rudenko (2):
      media: videobuf2: Fix dmabuf cache sync/flush in dma-contig
      media: rkisp1: Allow non-coherent video capture buffers

 .../media/common/videobuf2/videobuf2-dma-contig.c  | 22 ++++++++++++++++++++++
 .../platform/rockchip/rkisp1/rkisp1-capture.c      |  1 +
 2 files changed, 23 insertions(+)
---
base-commit: b2c4bf0c102084e77ed1b12090d77a76469a6814
change-id: 20241231-b4-rkisp-noncoherent-ad6e7c7a68ba

Best regards,