linux-kernel - Re: [PATCH v3 1/3] ASoC: Add support for Loongson I2S controller

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Message-ID: <ecd99175-d9da-cecd-d165-e9bd3452f7cb@loongson.cn>
Date:   Thu, 15 Jun 2023 20:23:48 +0800
From:   Yingkun Meng <mengyingkun@...ngson.cn>
To:     Mark Brown <broonie@...nel.org>
Cc:     lgirdwood@...il.com, krzysztof.kozlowski@...aro.org,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        loongarch@...ts.linux.dev, loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v3 1/3] ASoC: Add support for Loongson I2S controller


On 2023/6/15 19:30, Mark Brown wrote:
> On Wed, Jun 14, 2023 at 08:21:40PM +0800, YingKun Meng wrote:
>> From: Yingkun Meng <mengyingkun@...ngson.cn>
>>
>> Loongson I2S controller is found on 7axxx/2kxxx chips from loongson,
>> it is a PCI device with two private DMA controllers, one for playback,
>> the other for capture.
>>
>> The driver supports the use of DTS or ACPI to describe device resources.
> One minor thing which can be done as an incremental patch:
>
>> +/*
>> + * DMA registers descriptor.
>> + */
>> +struct loongson_dma_desc {
>> +	u32 order;		/* Next descriptor address register */
> This probably needs a __packed to ensure the layout doesn't get changed
> by the compiler (eg, with struct randomisation options).

OK, got it.

Thanks,

Yingkun