.../bindings/dma/snps,dw-axi-dmac.yaml | 1 + arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +- .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 26 ++++++++++++++++--- drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 + 4 files changed, 25 insertions(+), 5 deletions(-)
As the DMA controller on Sophgo CV1800 series SoC only has 8 channels,
the SoC provides a dma multiplexer to reuse the DMA channel. However,
the dma multiplexer also controlls the DMA interrupt multiplexer, which
means that the dma multiplexer needs to know the channel number.
Change the DMA phandle args parsing logic so it can use handshake
number as channel number if necessary.
Change from v1:
1. rebase to v6.19-rc1
2. patch 1: remove a comment placed in wrong place.
3. patch 2: fix typo in comments.
4. patch 2: initialize chan as NULL in dw_axi_dma_of_xlate.
Inochi Amaoto (3):
dt-bindings: dma: snps,dw-axi-dmac: Add CV1800B compatible
dmaengine: dw-axi-dmac: Add support for CV1800B DMA
riscv: dts: sophgo: cv180x: Allow the DMA multiplexer to set channel
number for DMA controller
.../bindings/dma/snps,dw-axi-dmac.yaml | 1 +
arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +-
.../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 26 ++++++++++++++++---
drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 +
4 files changed, 25 insertions(+), 5 deletions(-)
--
2.52.0
On Mon, Dec 15, 2025 at 06:45:57AM +0800, Inochi Amaoto wrote: > As the DMA controller on Sophgo CV1800 series SoC only has 8 channels, > the SoC provides a dma multiplexer to reuse the DMA channel. However, > the dma multiplexer also controlls the DMA interrupt multiplexer, which > means that the dma multiplexer needs to know the channel number. > > Change the DMA phandle args parsing logic so it can use handshake > number as channel number if necessary. > > Change from v1: > 1. rebase to v6.19-rc1 > 2. patch 1: remove a comment placed in wrong place. > 3. patch 2: fix typo in comments. > 4. patch 2: initialize chan as NULL in dw_axi_dma_of_xlate. > > Inochi Amaoto (3): > dt-bindings: dma: snps,dw-axi-dmac: Add CV1800B compatible > dmaengine: dw-axi-dmac: Add support for CV1800B DMA > riscv: dts: sophgo: cv180x: Allow the DMA multiplexer to set channel > number for DMA controller > > .../bindings/dma/snps,dw-axi-dmac.yaml | 1 + > arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +- > .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 26 ++++++++++++++++--- > drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 + > 4 files changed, 25 insertions(+), 5 deletions(-) > > -- > 2.52.0 > Hi, Vinod Would you have any suggestion on this patch? Or this is OK to merge? Regards, Inochi
On Mon, Dec 15, 2025 at 06:45:57AM +0800, Inochi Amaoto wrote: > As the DMA controller on Sophgo CV1800 series SoC only has 8 channels, > the SoC provides a dma multiplexer to reuse the DMA channel. However, > the dma multiplexer also controlls the DMA interrupt multiplexer, which > means that the dma multiplexer needs to know the channel number. > > Change the DMA phandle args parsing logic so it can use handshake > number as channel number if necessary. > > Change from v1: > 1. rebase to v6.19-rc1 > 2. patch 1: remove a comment placed in wrong place. > 3. patch 2: fix typo in comments. > 4. patch 2: initialize chan as NULL in dw_axi_dma_of_xlate. > > Inochi Amaoto (3): > dt-bindings: dma: snps,dw-axi-dmac: Add CV1800B compatible > dmaengine: dw-axi-dmac: Add support for CV1800B DMA > riscv: dts: sophgo: cv180x: Allow the DMA multiplexer to set channel > number for DMA controller > > .../bindings/dma/snps,dw-axi-dmac.yaml | 1 + > arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +- > .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 26 ++++++++++++++++--- > drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 + > 4 files changed, 25 insertions(+), 5 deletions(-) > > -- > 2.52.0 > Hi Anton, Since you have tested this patch before, could you give a Tested-by? Regards, Inochi
On Tue, Dec 16, 2025 at 07:09:16PM +0400, Inochi Amaoto wrote: > Hi Anton, > > Since you have tested this patch before, could you give a Tested-by? > Done. V2 works fine with Milk Duo 256M with 2 channels RX and TX working simultaneously. Tested-by: Anton D. Stavinskii <stavinsky@gmail.com>
On Tue, Dec 16, 2025 at 07:25:06PM +0400, Anton D. Stavinskii wrote: > On Tue, Dec 16, 2025 at 07:09:16PM +0400, Inochi Amaoto wrote: > > > Hi Anton, > > > > Since you have tested this patch before, could you give a Tested-by? > > > Done. V2 works fine with Milk Duo 256M with 2 channels RX and TX working > simultaneously. > > > Tested-by: Anton D. Stavinskii <stavinsky@gmail.com> Thanks Regards, Inochi
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