[JP6.1/JP6.2] Regarding to 'non-coherent' property

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
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Hi Nvidia,

Do we need to patch following kernel dts to change non-coherent to dma-noncoherent?

nv-tegra.nvidia Code Review - device/hardware/nvidia/t23x-public-dts.git/blob - nv-soc/tegra234-soc-display-overlay.dtsi

nv-tegra.nvidia Code Review - device/hardware/nvidia/t23x-public-dts.git/blob - overlay/tegra234-soc-overlay-mods.dtsi

3

Hi,

Why do you think you need that?

4

Hi WayneWWW,

Thanks for the reply.

From the patch mentioned in the discussion below, I would like to clarify whether we need to change all instances of non-coherent to dma-noncoherent.
[Camera][VI][JP-6.0/r36.3] Fixes for raw image corruption (line artifacts) through VI-mode - Jetson & Embedded Systems / Jetson AGX Orin - NVIDIA Developer Forums

Thank you

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hello brian.wu,

we only test camera part, (i.e. VI drivers.), do you seeing any failures?

7

Hi JerryChang,

No. I tested both non-coherent and dma-noncoherent configurations and did not find any differences so far.

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hello brian.wu,

thanks for sharing, I’ve went through the code quickly, and it looks display driver still parse non-coherent boolean property from device tree.
so… let’s keep using it. you don’t need a change.

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Hi JerryChang,

Got it. Thank you.

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