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dt-bindings: media: ti,j721e-csi2rx-shim: Support 32 dma chans

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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@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Yemike Abhilash Chandra <y-abhilashchandra@ti.com>
Signed-off-by: Rishikesh Donadkar <r-donadkar@ti.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
This commit is contained in:
Jai Luthra 2026-05-20 17:30:07 +05:30 committed by Sakari Ailus
parent 148d96822b
commit bfd10a287c
1 changed files with 36 additions and 3 deletions
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39
Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml
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@ -20,11 +20,44 @@ properties:
const: ti,j721e-csi2rx-shim
dmas:
maxItems: 1
minItems: 1
maxItems: 32
dma-names:
minItems: 1
items:
- const: rx0
- const: rx1
- const: rx2
- const: rx3
- const: rx4
- const: rx5
- const: rx6
- const: rx7
- const: rx8
- const: rx9
- const: rx10
- const: rx11
- const: rx12
- const: rx13
- const: rx14
- const: rx15
- const: rx16
- const: rx17
- const: rx18
- const: rx19
- const: rx20
- const: rx21
- const: rx22
- const: rx23
- const: rx24
- const: rx25
- const: rx26
- const: rx27
- const: rx28
- const: rx29
- const: rx30
- const: rx31
reg:
maxItems: 1
@ -62,8 +95,8 @@ examples:
ti_csi2rx0: ticsi2rx@4500000 {
compatible = "ti,j721e-csi2rx-shim";
dmas = <&main_udmap 0x4940>;
dma-names = "rx0";
dmas = <&main_udmap 0x4940>, <&main_udmap 0x4941>;
dma-names = "rx0", "rx1";
reg = <0x4500000 0x1000>;
power-domains = <&k3_pds 26 TI_SCI_PD_EXCLUSIVE>;
#address-cells = <1>;