linux-kernel - Re: [PATCH v4 00/25] MediaTek UFS Cleanup and MT8196 Enablement

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Message-ID: <ddff4617-884d-4ac2-bc24-28f669104b2e@collabora.com>
Date: Tue, 23 Dec 2025 13:04:53 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>,
 Alim Akhtar <alim.akhtar@...sung.com>, Avri Altman <avri.altman@....com>,
 Bart Van Assche <bvanassche@....org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>,
 Chunfeng Yun <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>,
 Peter Wang <peter.wang@...iatek.com>, Stanley Jhu <chu.stanley@...il.com>,
 "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
 "Martin K. Petersen" <martin.petersen@...cle.com>,
 Philipp Zabel <p.zabel@...gutronix.de>, Liam Girdwood <lgirdwood@...il.com>,
 Mark Brown <broonie@...nel.org>, Chaotian Jing <Chaotian.Jing@...iatek.com>,
 Neil Armstrong <neil.armstrong@...aro.org>
Cc: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>,
 kernel@...labora.com, linux-scsi@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 linux-phy@...ts.infradead.org
Subject: Re: [PATCH v4 00/25] MediaTek UFS Cleanup and MT8196 Enablement

Il 18/12/25 13:54, Nicolas Frattaroli ha scritto:
> In this series, the existing MediaTek UFS binding is expanded and
> completed to correctly describe not just the existing compatibles, but
> also to introduce a new compatible in the from of the MT8196 SoC.
> 
> The resets, which until now were completely absent from both the UFS
> host controller binding and the UFS PHY binding, are introduced to both.
> This also means the driver's undocumented and, in mainline, unused reset
> logic is reworked. In particular, the PHY reset is no longer a reset of
> the host controller node, but of the PHY node.
> 
> This means the host controller can reset the PHY through the common PHY
> framework.
> 
> The resets remain optional.
> 
> Additionally, a massive number of driver cleanups are introduced. These
> were prompted by me inspecting the driver more closely as I was
> adjusting it to correspond to the binding.
> 
> The driver still implements vendor properties that are undocumented in
> the binding. I did not touch most of those, as I neither want to
> convince the bindings maintainers that they are needed without knowing
> precisely what they're for, nor do I want to argue with the driver
> authors when removing them.
> 
> Due to the "Marie Kondo with a chainsaw" nature of the driver cleanup
> patches, I humbly request that reviewers do not comment on displeasing
> code they see in the context portion of a patch before they've read the
> whole patch series, as that displeasing code may in fact be reworked in
> a subsequent patch of this series. Please keep comments focused on the
> changed lines of the diff; I know there's more that can be done, but it
> doesn't necessarily need to be part of this series.
> 
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
> ---
> Changes in v4:
> - bindings: Redo the supply situation, as the avdd pins don't describe
>    the vcc(q2) card supplies.
> - bindings: format clock in mt8196 example more tersely.
> - phy: use devm_reset_control_get_optional_exclusive directly
> - driver: get and enable/disable the aforementioned avdd supplies.
> - Link to v3: https://lore.kernel.org/r/20251023-mt8196-ufs-v3-0-0f04b4a795ff@collabora.com
> 
> Changes in v3:
> - Split mediatek,ufs bindings change into two patches, one for
>    completing the existing binding, one for the MT8196
> - Add over a dozen driver cleanup patches
> - Add explicit support for the MT8196 compatible to the driver
> - Note: next-20251023, on which I based this, currently has a broken
>    build due to an unrelated OPP core change that was merged with no
>    build testing. I can't use next-20251022 either, as that lacks the
>    recent mediatek UFS changes. It is what it is.
> - Link to v2: https://lore.kernel.org/r/20251016-mt8196-ufs-v2-0-c373834c4e7a@collabora.com
> 
> Changes in v2:
> - Reorder define in mtk_sip_svc.h
> - Use bulk reset APIs in UFS host driver
> - Link to v1: https://lore.kernel.org/r/20251014-mt8196-ufs-v1-0-195dceb83bc8@collabora.com
> 

Whole series is

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>