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From: Thierry Reding <thierry.reding@gmail.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: Will Deacon <will@kernel.org>, Joerg Roedel <joro@8bytes.org>,
	iommu@lists.linux-foundation.org,
	Jon Hunter <jonathanh@nvidia.com>,
	Nicolin Chen <nicolinc@nvidia.com>,
	linux-tegra@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 00/10] arm64: tegra: Prevent early SMMU faults
Date: Wed, 2 Jun 2021 16:53:33 +0200
Message-ID: <YLebbQZlROtSq124@orome.fritz.box> (raw)
In-Reply-To: <e2341ca1-7b6d-cc19-8c43-1ada0b1f5601@canonical.com>

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On Wed, Jun 02, 2021 at 12:44:58PM +0200, Krzysztof Kozlowski wrote:
> On 02/06/2021 10:52, Thierry Reding wrote:
> > On Wed, Jun 02, 2021 at 09:35:13AM +0200, Krzysztof Kozlowski wrote:
> >> On 02/06/2021 09:33, Krzysztof Kozlowski wrote:
> >>> On 01/06/2021 20:08, Thierry Reding wrote:
> >>>> On Tue, Jun 01, 2021 at 01:26:46PM +0100, Will Deacon wrote:
> >>>>> On Fri, May 28, 2021 at 07:05:28PM +0200, Thierry Reding wrote:
> >>>>>> On Tue, Apr 20, 2021 at 07:26:09PM +0200, Thierry Reding wrote:
> >>>>>>> From: Thierry Reding <treding@nvidia.com>
> >>>>>>>
> >>>>> Probably best if I queue 3-6 on a separate branch once you send a v3,
> >>>>> then Krzysztof can pull that in if he needs it.
> >>>>
> >>>> Patch 5 has a build-time dependency on patch 1, so they need to go in
> >>>> together. The reason why I suggested Krzysztof pick these up is because
> >>>> there is a restructuring series that this depends on, which will go into
> >>>> Krzysztof's tree. So in order to pull in 3-6, you'd get a bunch of other
> >>>> and mostly unrelated stuff as well.
> >>>
> >>> I missed that part... what other series are needed for this one? Except
> >>> Dmitry's power management set I do not have anything in my sight for
> >>> Tegras memory controllers.
> >>>
> >>> Anyway, I can take the memory bits and provide a stable tag with these.
> >>> Recently there was quite a lot work around Tegra memory controllers, so
> >>> this makes especially sense if new patches appear.
> >>
> >> OK, I think I have now the patchset you talked about - "memory: tegra:
> >> Driver unification" v2, right?
> > 
> > Yes, that's the one. That series is fairly self-contained, but Dmitry's
> > power management set has dependencies that pull in the regulator, clock
> > and ARM SoC trees.
> > 
> > I did a test merge of the driver unification series with a branch that
> > has Dmitry's patches and all the dependencies and there are no conflicts
> > so that, fortunately, doesn't further complicates things.
> > 
> > Do you want me to send you a pull request with Dmitry's memory
> > controller changes? You could then apply the unification series on top,
> > which should allow this SMMU series to apply cleanly on top of that.
> 
> Makes sense and it looks quite bulletproof for future changes. Let's do
> like this. I will apply your patch 1/10 from this v2 on top of it and
> driver unification later.

The SMMU series here depends on the unification series, so the
unification series needs to go first. It'd be a fair bit of work to
reverse that because the ->probe_device() callback implemented by the
first patch of this SMMU series is part of the tegra_mc_ops structure
that's introduced in the unification series.

Thierry

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Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-20 17:26 Thierry Reding
2021-04-20 17:26 ` [PATCH v2 01/10] memory: tegra: Implement SID override programming Thierry Reding
2021-04-26  8:28   ` Krzysztof Kozlowski
2021-04-26 12:13     ` Thierry Reding
2021-04-26 14:10       ` Krzysztof Kozlowski
2021-04-20 17:26 ` [PATCH v2 02/10] dt-bindings: arm-smmu: Add Tegra186 compatible string Thierry Reding
2021-04-20 17:26 ` [PATCH v2 03/10] iommu/arm-smmu: Implement ->probe_finalize() Thierry Reding
2021-04-20 17:26 ` [PATCH v2 04/10] iommu/arm-smmu: tegra: Detect number of instances at runtime Thierry Reding
2021-04-20 22:06   ` Krishna Reddy
2021-04-20 17:26 ` [PATCH v2 05/10] iommu/arm-smmu: tegra: Implement SID override programming Thierry Reding
2021-04-20 17:26 ` [PATCH v2 06/10] iommu/arm-smmu: Use Tegra implementation on Tegra186 Thierry Reding
2021-04-20 17:26 ` [PATCH v2 07/10] arm64: tegra: Use correct compatible string for Tegra186 SMMU Thierry Reding
2021-04-20 17:26 ` [PATCH v2 08/10] arm64: tegra: Hook up memory controller to SMMU on Tegra186 Thierry Reding
2021-04-20 17:26 ` [PATCH v2 09/10] arm64: tegra: Enable SMMU support on Tegra194 Thierry Reding
2021-04-20 17:26 ` [PATCH v2 10/10] arm64: tegra: Enable SMMU support for display " Thierry Reding
2021-05-28 17:05 ` [PATCH v2 00/10] arm64: tegra: Prevent early SMMU faults Thierry Reding
2021-06-01 12:26   ` Will Deacon
2021-06-01 18:08     ` Thierry Reding
2021-06-02  7:33       ` Krzysztof Kozlowski
2021-06-02  7:35         ` Krzysztof Kozlowski
2021-06-02  8:52           ` Thierry Reding
2021-06-02 10:44             ` Krzysztof Kozlowski
2021-06-02 11:40               ` Will Deacon
2021-06-02 14:58                 ` Thierry Reding
2021-06-02 14:58                   ` Krzysztof Kozlowski
2021-06-02 14:53               ` Thierry Reding [this message]
2021-06-02 14:57                 ` Krzysztof Kozlowski

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