linux-kernel - Re: [PATCH 0/4] dmaengine: fsl-edma: fix eDMAv4 uart dma loop test failure

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Message-ID: <ZXvebWSmOhHRIcZc@lizhi-Precision-Tower-5810>
Date: Fri, 15 Dec 2023 00:04:45 -0500
From: Frank Li <Frank.li@....com>
To: krzysztof.kozlowski@...aro.org, shawnguo@...nel.org, festevam@...x.de
Cc: devicetree@...r.kernel.org, dmaengine@...r.kernel.org,
	imx@...ts.linux.dev, joy.zou@....com,
	krzysztof.kozlowski+dt@...aro.org, linux-kernel@...r.kernel.org,
	peng.fan@....com, robh+dt@...nel.org, shenwei.wang@....com,
	vkoul@...nel.org
Subject: Re: [PATCH 0/4] dmaengine: fsl-edma: fix eDMAv4 uart dma loop test
 failure

On Tue, Nov 14, 2023 at 10:48:20AM -0500, Frank Li wrote:
> The commit a725990557e7d ("arm64: dts: imx93: Fix the dmas entries order")
> trigger a hidden eDMAv4 hardware limitation.
> 
> Some channel require stick to odd number, some require stick to even
> number.
> 
> This fixes include 3 part.
> 1. add limitation at eDMA driver.
> 2. create dt-binding header file to share define between driver and dts
> 3. add ODD and EVEN requirement for uart driver at dts file.

@vkoul:
	Did you have chance to check this patch?

Frank	

> 
> Frank Li (4):
>   dmaengine: fsl-edma: fix eDMAv4 channel allocation issue
>   dt-bindings: dma: fsl-edma: Add fsl-edma.h to prevent hardcoding in
>     dts
>   dmaengine: fsl-edma: utilize common dt-binding header file
>   arm64: dts: imx93: Fix EDMA transfer failure
> 
>  arch/arm64/boot/dts/freescale/imx93.dtsi | 13 +++++++++----
>  drivers/dma/fsl-edma-main.c              | 17 ++++++++++-------
>  include/dt-bindings/dma/fsl-edma.h       | 21 +++++++++++++++++++++
>  3 files changed, 40 insertions(+), 11 deletions(-)
>  create mode 100644 include/dt-bindings/dma/fsl-edma.h
> 
> -- 
> 2.34.1
>