This series adds multi-stream support for Cadence CSI2RX and TI CSI2RX Shim drivers. PATCH 1: Runtime Power Management for Cadence CSI2RX PATCH 2-7: Support multiple DMA contexts/video nodes in TI CSI2RX PATCH 8-9: Use get_frame_desc to propagate virtual channel information across Cadence and TI CSI-RX subdevs PATCH 10-12: Use new multi-stream APIs across the drivers to support multiplexed cameras from sources like UB960 (FPDLink) PATCH 13: Optimize stream on by submitting all queued buffers to DMA This applies on top of today's linux-next (next-20240626) (also tested rebase with media_stage.git master) Signed-off-by: Jai Luthra <j-luthra@xxxxxx> --- Changes in v2: - Change the multi-camera capture architecture to be similar to that of Tomi's RPi5 FE series, where the driver will wait for userspace to start streaming on all "actively routed" video nodes before starting streaming on the source. This simplifies things a lot from the HW perspective, which might run into deadlocks due to a shared FIFO between multiple DMA channels. - Drop a few fixes that were posted separately and are already merged - Fix dtschema warnings reported by Rob on [02/13] - Fix warnings for uninitialized `used_vc` variable in cdns-csi2rx.c - Return -EBUSY if someone updates routes for j721e-csi2rx subdev while streaming - Only allow single-streams to be routed to the source pads (linked to video nodes) of the j721e-csi2rx device - Squash the patches marked "SQUASH" in the v1 RFC series - Link to RFC (v1): https://lore.kernel.org/r/20240222-multistream-v1-0-1837ed916eeb@xxxxxx --- Jai Luthra (8): dt-bindings: media: ti,j721e-csi2rx-shim: Support 32 dma chans media: ti: j721e-csi2rx: separate out device and context media: ti: j721e-csi2rx: add a subdev for the core device media: ti: j721e-csi2rx: add support for processing virtual channels media: cadence: csi2rx: Use new enable stream APIs media: cadence: csi2rx: Enable multi-stream support media: ti: j721e-csi2rx: add multistream support media: ti: j721e-csi2rx: Submit all available buffers Jayshri Pawar (1): media: cadence: csi2rx: Support runtime PM Pratyush Yadav (4): media: ti: j721e-csi2rx: prepare SHIM code for multiple contexts media: ti: j721e-csi2rx: allocate DMA channel based on context index media: ti: j721e-csi2rx: get number of contexts from device tree media: cadence: csi2rx: add get_frame_desc wrapper .../bindings/media/ti,j721e-csi2rx-shim.yaml | 39 +- drivers/media/platform/cadence/cdns-csi2rx.c | 440 +++++++++-- .../media/platform/ti/j721e-csi2rx/j721e-csi2rx.c | 879 ++++++++++++++++----- 3 files changed, 1071 insertions(+), 287 deletions(-) --- base-commit: df9574a57d02b265322e77fb8628d4d33641dda9 change-id: 20240221-multistream-fbba6ffe47a3 Best regards, -- Jai Luthra <j-luthra@xxxxxx>
