linux-kernel - Re: [PATCH 4/4] dmaengine: fsl-edma: integrate TCD64 support for i.MX95

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Date:   Fri, 10 Nov 2023 09:59:03 -0500
From:   Frank Li <Frank.li@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
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 4/4] dmaengine: fsl-edma: integrate TCD64 support for
 i.MX95

On Fri, Nov 10, 2023 at 03:50:18PM +0100, Krzysztof Kozlowski wrote:
> On 09/11/2023 22:20, Frank Li wrote:
> > In i.MX95's edma version 5, the TCD structure is extended to support 64-bit
> > addresses for fields like saddr and daddr. To prevent code duplication,
> > employ help macros to handle the fields, as the field names remain the same
> > between TCD and TCD64.
> > 
> > Change local variables related to TCD addresses from 'u32' to 'dma_addr_t'
> > to accept 64-bit DMA addresses.
> > 
> > Change 'vtcd' type to 'void *' to avoid direct use. Use helper macros to
> > access the TCD fields correctly.
> > 
> > Call 'dma_set_mask_and_coherent(64)' when TCD64 is supported.
> > 
> > Signed-off-by: Frank Li <Frank.Li@....com>
> > ---
> 
> Three kbuild reports with build failures.
> 
> I have impression this was never build-tested and reviewed internally
> before posting. We had such talk ~month ago and I insisted on some
> internal review prior submitting to mailing list. I did not insist on
> internal building of patches, because it felt obvious, so please kindly
> thoroughly build, review and test your patches internally, before using
> the community for this. I am pretty sure NXP can build the code they send.

This build error happen at on special uncommon platform m6800. 
Patch is tested in imx95 arm64 platform.

I have not machine to cover all platform.

Frank

> 
> Thank you in advance.
> 
> Best regards,
> Krzysztof
>