[PATCH v2 00/18] Add DT support for CSI2RX multi-stream

Tue Aug 25 22:46:16 PDT 2026

On 13/07/26 17:04, Yemike Abhilash Chandra wrote:
> Support for multi-stream in j721e-csi2rx.c driver was merged last cycle[0].
> This series adds the corresponding device tree support.
> 
> Patch 1 is a cleanup fixing indentation in the existing CSI2RX nodes.
> 
> The next few patches i.e. (Patch 2 to Patch 6) add the additional DMA
> channels required for CSI2RX multi-stream capture.
> 
> Multi-stream capture uses a SERDES pair based on the FPD-Link or
> V3Link protocol. The serializer takes the input from a camera sensor
> and converts it to the FPD-Link standard, while the deserializer
> aggregates streams from multiple serializers and sends them over the
> CSI-2 RX interface. Each CSI2RX instance therefore indirectly receives
> input from multiple sensors.
> 
> The remaining patches add overlays for various deserializer boards,
> and for the UB953 serializer with the IMX219 sensor. Also enabling
> DS90UB960 deserializer and DS90UB953 serializer drivers in the
> arm64 defconfig.

Hi Abhilash,

Thank you for the series. LGTM !

For the entire series,

Reviewed-by: Rishikesh Donadkar <r-donadkar at ti.com>

Rishikesh

> 
> Changelog:
> Changes in v2:
> - Add missing bus-type property in csi2_phy endpoints in overlays (sashiko)
> - Add missing build targets in Makefile for some overlays (sashiko)
> - Fix minor DTS styling and whitespace inconsistencies in port definitions in overlays (sashiko)
> - Remove unused gpio.h header in overlays (sashiko)
> - Don't replacing generic V3Link fusion board DTB targets instead append new build
>    targets for v3link + IMX219 (sashiko) (Patch 17)
> - Add status = "okay" property in port 0 of deserializer ports (sashiko) (patch 17)
> - Add port-specific suffixes to avoid naming collisions (sashiko) (patch 17)
> - Add reason in the commit message on why we want the DS90UB960 deserializer and DS90UB953
>    serializer drivers to be enabled in defconfig (Krzysztof) (Patch 18)
> - Rebase on top of linux-next (20260709)
> 
> Link to v1: https://lore.kernel.org/all/20260702093123.1048575-1-y-abhilashchandra@ti.com/
> 
> Testlogs:
> J721E + Fusion application daughter board: https://gist.github.com/Yemike-Abhilash-Chandra/18b5b81157fa67ab71f711f5b2cdc0a5
> J721S2 + Fusion application daughter board: https://gist.github.com/Yemike-Abhilash-Chandra/0b8f3617ce7620961d533edfd7c51be0
> J784S4 + Fusion application daughter board: https://gist.github.com/Yemike-Abhilash-Chandra/7791f3b224f6df34824ae418b9bd9963
> AM68 + Fusion application daughter board: https://gist.github.com/Yemike-Abhilash-Chandra/29c1c9793939633926b1db3fe058a629
> 
> J721E + DS90UB954-Q1EVM: http://gist.github.com/Yemike-Abhilash-Chandra/6d2e1f3f0cafd0eec7eb65061ebe221a
> J721S2 + DS90UB954-Q1EVM: https://gist.github.com/Yemike-Abhilash-Chandra/a145ae81e7946cdc1c600cb377d3ad44
> 
> J784S4 + J7EXPA01EVM Fusion2: https://gist.github.com/Yemike-Abhilash-Chandra/8d7f06881d5435bfa5d9bdbfb209bc38
> 
> AM68 + Arducam V3link: https://gist.github.com/Yemike-Abhilash-Chandra/2c607145ba80e3554320042b29af9985
> J722S + Arducam V3link: https://gist.github.com/Yemike-Abhilash-Chandra/b1fc2e2e8f15372f1379afe5c23668f5
> 
> (grep for "ds90ub960" for the deserializer logs and "ds90ub953" for the serializer.
>   grep for "running tests" to see the actual test pattern genertaion capture logs from
>   the sensor over the SERDES)
> 
> dtbs_check: make CONFIG_OF_ALL_DTBS=y dtstree=arch/arm64/boot/dts/ti dtbs_check gives no errors
> 
> Branch: https://github.com/Yemike-Abhilash-Chandra/linux/tree/CSI_MT_DT_V4
> 
> [0]: https://lore.kernel.org/all/20260520120022.539913-1-r-donadkar@ti.com/
> 
> Jianzhong Xu (1):
>    arm64: dts: ti: k3-v3link: Add overlay for IMX219+UB953 serializer
> 
> Vaishnav Achath (13):
>    arm64: dts: ti: k3-{j721e/j721s2}-main: Fix indentation in CSI2RX node
>    arm64: dts: ti: k3-j721e-main: Add multiple channels for CSI2RX DMA
>    arm64: dts: ti: k3-j721s2-main: Add multiple channels for CSI2RX DMA
>    arm64: dts: ti: k3-j784s4-j742s2-main-common: Add multiple channels
>      for CSI2RX DMA
>    arm64: dts: ti: k3-am62p-j722s: Add multiple channels for CSI2RX DMA
>    arm64: dts: ti: k3-j722s-main: Add multiple channels for CSI2RX DMA
>    arm64: dts: ti: k3-j721e: Add overlay for fusion application daughter
>      board
>    arm64: dts: ti: k3-j721s2: Add overlay for fusion application daughter
>      board
>    arm64: dts: ti: k3-j721e-sk: Add overlay for fusion application
>      daughter board
>    arm64: dts: ti: k3-j722s-evm: Add overlay for fusion application
>      daughter board
>    arm64: dts: ti: k3-am68-sk: Add overlay for dual Arducam V3link fusion
>    arm64: dts: ti: k3-j722s-evm: Add overlay for dual Arducam V3link
>      fusion
>    arm64: dts: ti: k3-j784s4-evm: Add overlay for J7EXPA01EVM Fusion2
> 
> Yemike Abhilash Chandra (4):
>    arm64: dts: ti: k3-j722s-evm: Add overlay for J7EXPA01EVM Fusion2
>    arm64: dts: ti: k3-j721s2: Add overlay for DS90UB954-Q1EVM
>    arm64: dts: ti: k3-j721e: Add overlay for DS90UB954-Q1EVM
>    arm64: defconfig: Enable DS90UB960 deserializer and DS90UB953
>      serializer
> 
>   arch/arm64/boot/dts/ti/Makefile               |  83 +++++
>   .../dts/ti/k3-am62p-j722s-common-main.dtsi    |   6 +-
>   .../boot/dts/ti/k3-am68-sk-v3link-fusion.dtso | 200 ++++++++++++
>   .../boot/dts/ti/k3-j721e-evm-fusion.dtso      | 190 +++++++++++
>   .../arm64/boot/dts/ti/k3-j721e-evm-ub954.dtso |  92 ++++++
>   arch/arm64/boot/dts/ti/k3-j721e-main.dtsi     |  24 +-
>   .../dts/ti/k3-j721e-sk-fpdlink-fusion.dtso    | 190 +++++++++++
>   .../boot/dts/ti/k3-j721s2-evm-fusion.dtso     | 190 +++++++++++
>   .../boot/dts/ti/k3-j721s2-evm-ub954.dtso      |  92 ++++++
>   arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi    |  22 +-
>   .../dts/ti/k3-j722s-evm-fpdlink-fusion.dtso   | 196 ++++++++++++
>   .../ti/k3-j722s-evm-fpdlink-iv-fusion.dtso    | 299 ++++++++++++++++++
>   .../dts/ti/k3-j722s-evm-v3link-fusion.dtso    | 213 +++++++++++++
>   arch/arm64/boot/dts/ti/k3-j722s-main.dtsi     |  15 +-
>   .../ti/k3-j784s4-evm-fpdlink-iv-fusion.dtso   | 282 +++++++++++++++++
>   .../dts/ti/k3-j784s4-j742s2-main-common.dtsi  |  21 +-
>   .../boot/dts/ti/k3-v3link-imx219-0-0.dtso     | 128 ++++++++
>   arch/arm64/configs/defconfig                  |   2 +
>   18 files changed, 2217 insertions(+), 28 deletions(-)
>   create mode 100644 arch/arm64/boot/dts/ti/k3-am68-sk-v3link-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-evm-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-evm-ub954.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-sk-fpdlink-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j721s2-evm-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j721s2-evm-ub954.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j722s-evm-fpdlink-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j722s-evm-fpdlink-iv-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j722s-evm-v3link-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j784s4-evm-fpdlink-iv-fusion.dtso
>   create mode 100644 arch/arm64/boot/dts/ti/k3-v3link-imx219-0-0.dtso
> 