linux-kernel - Re: [PATCH v3 01/13] dt-bindings: media: ti,j721e-csi2rx-shim: Support 32 dma chans

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Message-ID: <174527441344.3212247.14328786024565701263.robh@kernel.org>
Date: Mon, 21 Apr 2025 17:26:53 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Rishikesh Donadkar <r-donadkar@...com>
Cc: krzk+dt@...nel.org, mchehab@...nel.org, devarsht@...com,
	hverkuil-cisco@...all.nl, s-jain1@...com, jack.zhu@...rfivetech.com,
	vigneshr@...com, linux-media@...r.kernel.org,
	jai.luthra@...asonboard.com, laurent.pinchart@...asonboard.com,
	changhuang.liang@...rfivetech.com, linux-kernel@...r.kernel.org,
	tomi.valkeinen@...asonboard.com, vaishnav.a@...com,
	y-abhilashchandra@...com, jai.luthra@...ux.dev,
	devicetree@...r.kernel.org, mripard@...nel.org,
	sakari.ailus@...ux.intel.com, conor+dt@...nel.org
Subject: Re: [PATCH v3 01/13] dt-bindings: media: ti,j721e-csi2rx-shim:
 Support 32 dma chans


On Thu, 17 Apr 2025 12:25:42 +0530, Rishikesh Donadkar wrote:
> From: Jai Luthra <j-luthra@...com>
> 
> The CSI2RX SHIM IP can support 32x DMA channels. These can be used to
> split incoming "streams" of data on the CSI-RX port, distinguished by
> MIPI Virtual Channel (or Data Type), into different locations in memory.
> 
> Actual number of DMA channels allocated to CSI-RX is dependent on the
> usecase, and can be modified using the K3 Resource Partitioning tool [1].
> So set the minimum channels as 1 and maximum as 32.
> 
> Link: https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/10_00_07_04/exports/docs/linux/How_to_Guides/Host/K3_Resource_Partitioning_Tool.html [1]
> Link: https://www.ti.com/lit/pdf/spruiv7
> Signed-off-by: Jai Luthra <j-luthra@...com>
> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> Signed-off-by: Rishikesh Donadkar <r-donadkar@...com>
> ---
>  .../bindings/media/ti,j721e-csi2rx-shim.yaml  | 39 +++++++++++++++++--
>  1 file changed, 36 insertions(+), 3 deletions(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>