From: Mark Brown <broonie@kernel.org>
To: Jiaxin Yu <jiaxin.yu@mediatek.com>
Cc: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>,
robh+dt@kernel.org, tzungbi@google.com,
angelogioacchino.delregno@collabora.com, aaronyu@google.com,
matthias.bgg@gmail.com, trevor.wu@mediatek.com,
linmq006@gmail.com, alsa-devel@alsa-project.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
Project_Global_Chrome_Upstream_Group@mediatek.com,
"Tzung-Bi Shih" <tzungbi@kernel.org>
Subject: Re: [v7 2/4] ASoC: mediatek: mt8192: refactor for I2S3 DAI link of speaker
Date: Wed, 30 Mar 2022 15:24:11 +0100 [thread overview]
Message-ID: <YkRoC30JLDMeVi1B@sirena.org.uk> (raw)
In-Reply-To: <61e9fb59448837cfc8e3ec862b711294bcb68872.camel@mediatek.com>
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On Wed, Mar 30, 2022 at 10:06:24PM +0800, Jiaxin Yu wrote:
> On Wed, 2022-03-30 at 13:30 +0100, Mark Brown wrote:
> > Making a previously optional property required means that systems
> > that
> > previously worked may stop working unless they update their DT, DTs
> > may
> > be distributed separately to the kernel and perhaps even baked into
> > firmware or similar.
> Thank you for your detailed answer. I should keep the driver's behavior
> consistent with the description of dt-bindings. The "mediatek,hdmi-
> codec" needs to be set as the required property. Is my understanding
> right?
The binding document and code should match so if one is changed the
other needs to be changed too.
In theory we should never change a previously optional property to
required which would mean that the code should be updated to reflect the
binding document, however sometimes the DT isn't actually used as a
stable intereface by anything for a given property or device type so we
can get away with changing things.
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WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Jiaxin Yu <jiaxin.yu@mediatek.com>
Cc: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>,
robh+dt@kernel.org, tzungbi@google.com,
angelogioacchino.delregno@collabora.com, aaronyu@google.com,
matthias.bgg@gmail.com, trevor.wu@mediatek.com,
linmq006@gmail.com, alsa-devel@alsa-project.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
Project_Global_Chrome_Upstream_Group@mediatek.com,
"Tzung-Bi Shih" <tzungbi@kernel.org>
Subject: Re: [v7 2/4] ASoC: mediatek: mt8192: refactor for I2S3 DAI link of speaker
Date: Wed, 30 Mar 2022 15:24:11 +0100 [thread overview]
Message-ID: <YkRoC30JLDMeVi1B@sirena.org.uk> (raw)
In-Reply-To: <61e9fb59448837cfc8e3ec862b711294bcb68872.camel@mediatek.com>
[-- Attachment #1.1: Type: text/plain, Size: 1012 bytes --]
On Wed, Mar 30, 2022 at 10:06:24PM +0800, Jiaxin Yu wrote:
> On Wed, 2022-03-30 at 13:30 +0100, Mark Brown wrote:
> > Making a previously optional property required means that systems
> > that
> > previously worked may stop working unless they update their DT, DTs
> > may
> > be distributed separately to the kernel and perhaps even baked into
> > firmware or similar.
> Thank you for your detailed answer. I should keep the driver's behavior
> consistent with the description of dt-bindings. The "mediatek,hdmi-
> codec" needs to be set as the required property. Is my understanding
> right?
The binding document and code should match so if one is changed the
other needs to be changed too.
In theory we should never change a previously optional property to
required which would mean that the code should be updated to reflect the
binding document, however sometimes the DT isn't actually used as a
stable intereface by anything for a given property or device type so we
can get away with changing things.
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_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Jiaxin Yu <jiaxin.yu@mediatek.com>
Cc: devicetree@vger.kernel.org, linmq006@gmail.com,
"Nícolas F. R. A. Prado" <nfraprado@collabora.com>,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
Project_Global_Chrome_Upstream_Group@mediatek.com,
tzungbi@google.com, robh+dt@kernel.org,
linux-mediatek@lists.infradead.org, trevor.wu@mediatek.com,
"Tzung-Bi Shih" <tzungbi@kernel.org>,
matthias.bgg@gmail.com, aaronyu@google.com,
linux-arm-kernel@lists.infradead.org,
angelogioacchino.delregno@collabora.com
Subject: Re: [v7 2/4] ASoC: mediatek: mt8192: refactor for I2S3 DAI link of speaker
Date: Wed, 30 Mar 2022 15:24:11 +0100 [thread overview]
Message-ID: <YkRoC30JLDMeVi1B@sirena.org.uk> (raw)
In-Reply-To: <61e9fb59448837cfc8e3ec862b711294bcb68872.camel@mediatek.com>
[-- Attachment #1: Type: text/plain, Size: 1012 bytes --]
On Wed, Mar 30, 2022 at 10:06:24PM +0800, Jiaxin Yu wrote:
> On Wed, 2022-03-30 at 13:30 +0100, Mark Brown wrote:
> > Making a previously optional property required means that systems
> > that
> > previously worked may stop working unless they update their DT, DTs
> > may
> > be distributed separately to the kernel and perhaps even baked into
> > firmware or similar.
> Thank you for your detailed answer. I should keep the driver's behavior
> consistent with the description of dt-bindings. The "mediatek,hdmi-
> codec" needs to be set as the required property. Is my understanding
> right?
The binding document and code should match so if one is changed the
other needs to be changed too.
In theory we should never change a previously optional property to
required which would mean that the code should be updated to reflect the
binding document, however sometimes the DT isn't actually used as a
stable intereface by anything for a given property or device type so we
can get away with changing things.
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Jiaxin Yu <jiaxin.yu@mediatek.com>
Cc: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>,
robh+dt@kernel.org, tzungbi@google.com,
angelogioacchino.delregno@collabora.com, aaronyu@google.com,
matthias.bgg@gmail.com, trevor.wu@mediatek.com,
linmq006@gmail.com, alsa-devel@alsa-project.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
Project_Global_Chrome_Upstream_Group@mediatek.com,
"Tzung-Bi Shih" <tzungbi@kernel.org>
Subject: Re: [v7 2/4] ASoC: mediatek: mt8192: refactor for I2S3 DAI link of speaker
Date: Wed, 30 Mar 2022 15:24:11 +0100 [thread overview]
Message-ID: <YkRoC30JLDMeVi1B@sirena.org.uk> (raw)
In-Reply-To: <61e9fb59448837cfc8e3ec862b711294bcb68872.camel@mediatek.com>
[-- Attachment #1.1: Type: text/plain, Size: 1012 bytes --]
On Wed, Mar 30, 2022 at 10:06:24PM +0800, Jiaxin Yu wrote:
> On Wed, 2022-03-30 at 13:30 +0100, Mark Brown wrote:
> > Making a previously optional property required means that systems
> > that
> > previously worked may stop working unless they update their DT, DTs
> > may
> > be distributed separately to the kernel and perhaps even baked into
> > firmware or similar.
> Thank you for your detailed answer. I should keep the driver's behavior
> consistent with the description of dt-bindings. The "mediatek,hdmi-
> codec" needs to be set as the required property. Is my understanding
> right?
The binding document and code should match so if one is changed the
other needs to be changed too.
In theory we should never change a previously optional property to
required which would mean that the code should be updated to reflect the
binding document, however sometimes the DT isn't actually used as a
stable intereface by anything for a given property or device type so we
can get away with changing things.
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[-- Attachment #2: Type: text/plain, Size: 176 bytes --]
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-03-30 14:24 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-24 6:45 [v7 0/4] ASoC: mediatek: mt8192: support rt1015p_rt5682s Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` [v7 1/4] ASoC: dt-bindings: mt8192-mt6359: add new compatible and new properties Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-29 23:13 ` Rob Herring
2022-03-29 23:13 ` Rob Herring
2022-03-29 23:13 ` Rob Herring
2022-03-29 23:13 ` Rob Herring
2022-03-24 6:45 ` [v7 2/4] ASoC: mediatek: mt8192: refactor for I2S3 DAI link of speaker Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-29 22:30 ` Nícolas F. R. A. Prado
2022-03-29 22:30 ` Nícolas F. R. A. Prado
2022-03-29 22:30 ` Nícolas F. R. A. Prado
2022-03-29 22:30 ` Nícolas F. R. A. Prado
2022-03-30 2:33 ` Jiaxin Yu
2022-03-30 2:33 ` Jiaxin Yu
2022-03-30 2:33 ` Jiaxin Yu
2022-03-30 2:33 ` Jiaxin Yu
2022-03-30 12:30 ` Mark Brown
2022-03-30 12:30 ` Mark Brown
2022-03-30 12:30 ` Mark Brown
2022-03-30 12:30 ` Mark Brown
2022-03-30 14:06 ` Jiaxin Yu
2022-03-30 14:06 ` Jiaxin Yu
2022-03-30 14:06 ` Jiaxin Yu
2022-03-30 14:06 ` Jiaxin Yu
2022-03-30 14:24 ` Mark Brown [this message]
2022-03-30 14:24 ` Mark Brown
2022-03-30 14:24 ` Mark Brown
2022-03-30 14:24 ` Mark Brown
2022-03-30 15:48 ` Jiaxin Yu
2022-03-30 15:48 ` Jiaxin Yu
2022-03-30 15:48 ` Jiaxin Yu
2022-03-30 15:48 ` Jiaxin Yu
2022-03-30 16:14 ` Nícolas F. R. A. Prado
2022-03-30 16:14 ` Nícolas F. R. A. Prado
2022-03-30 16:14 ` Nícolas F. R. A. Prado
2022-03-30 16:14 ` Nícolas F. R. A. Prado
2022-03-30 15:20 ` Nícolas F. R. A. Prado
2022-03-30 15:20 ` Nícolas F. R. A. Prado
2022-03-30 15:20 ` Nícolas F. R. A. Prado
2022-03-30 15:20 ` Nícolas F. R. A. Prado
2022-03-30 16:20 ` Jiaxin Yu
2022-03-30 16:20 ` Jiaxin Yu
2022-03-30 16:20 ` Jiaxin Yu
2022-03-30 16:20 ` Jiaxin Yu
2022-03-24 6:45 ` [v7 3/4] ASoC: mediatek: mt8192: refactor for I2S8/I2S9 DAI links of headset Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` [v7 4/4] ASoC: mediatek: mt8192: support rt1015p_rt5682s Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
2022-03-24 6:45 ` Jiaxin Yu
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