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Message-ID: <9cb6ae6b-15df-4467-b1b4-e0efd61c0d8f@feathertop.org>
Date: Tue, 23 Jan 2024 19:33:02 +1100
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Subject: Re: [PATCH v3 2/3] dt-bindings: rockchip: rk809: Document audio codec
 properties
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To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
 linux-rockchip@lists.infradead.org, conor.dooley@microchip.com,
 robh+dt@kernel.org, devicetree@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org, Chris Zhong <zyw@rock-chips.com>,
 Conor Dooley <conor+dt@kernel.org>, Heiko Stuebner <heiko@sntech.de>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Lee Jones <lee@kernel.org>, Zhang Qing <zhangqing@rock-chips.com>,
 linux-kernel@vger.kernel.org
References: <20240120135529.899403-1-tim@feathertop.org>
 <20240120135529.899403-3-tim@feathertop.org>
 <04ccf5f5-1f02-42f9-b1fc-b781c54d7ae9@linaro.org>
 <93d775df-af84-44ff-870e-f720a33ddf34@feathertop.org>
 <0b0a4c9f-0549-4566-a900-b1d7de5838d5@linaro.org>
From: Tim Lunn <tim@feathertop.org>
In-Reply-To: <0b0a4c9f-0549-4566-a900-b1d7de5838d5@linaro.org>
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On 1/23/24 18:37, Krzysztof Kozlowski wrote:
> On 23/01/2024 05:10, Tim Lunn wrote:
>> On 1/22/24 19:14, Krzysztof Kozlowski wrote:
>>> On 20/01/2024 14:55, Tim Lunn wrote:
>>>> Rockchip RK809 shares the same audio codec block as the rk817 mfd, and
>>>> is compatible with the existing rk817_codec driver.
>>> Please use subject prefixes matching the subsystem. You can get them for
>>> example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
>>> your patch is touching.
>> Ok I will check this.
>>>> This patch introduces to the binding the standard property #sound-dai-cells
>>>> and also an optional codec child node to hold codec specific properties.
>>>> Currently there is only one property in this node however the downstream
>>>> driver shows a number of other properties that are supported by the codec
>>>> hardware, that could be implemented in the future. This maintains the
>>>> existing driver ABI and keeps consistency with the rk817 bindings.
>>> So you are adding a new node? Just for one property? No, just put it
>>> into parent node.
>> The existing upstream codec driver parses the property from the "codec"
>> sub-node, if I
>> move it to the parent node here, I will need to patch the codec driver
>> to search in both locations,
>> so as to not break the rk817 bindings.  If that is preferred, I can do
>> it that way.
> Your long commit msg has just very short mention about existing driver
> and the rest is not helpful. Please rephrase to explain why and what you
> are doing it.
>
OK I will rephrase both commit messages for the next version.
>>> Downstream driver does not matter at all in that aspect.
>>>
>> The codec hardware supports additional properties but they are not
>> implemented currently in
>> upstream driver.
>
> Again: it does not matter. Bindings are not about drivers.
>
> Best regards,
> Krzysztof
>