[PATCH v10 02/18] dt-bindings: media: ti,j721e-csi2rx-shim: Support 32 dma chans
From: Rishikesh Donadkar <hidden>
Date: 2026-01-21 13:54:55
Also in:
linux-media, lkml
Subsystem:
media input infrastructure (v4l/dvb), open firmware and flattened device tree bindings, the rest, ti j721e csi2rx driver · Maintainers:
Mauro Carvalho Chehab, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Jai Luthra
From: Jai Luthra <redacted> 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 <redacted> 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 <redacted> --- .../bindings/media/ti,j721e-csi2rx-shim.yaml | 39 +++++++++++++++++-- 1 file changed, 36 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml
index b9f033f2f3ce4..bf62998b0445a 100644
--- a/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml
+++ b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml@@ -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>;
--
2.34.1