From: Arnd Bergmann <arnd@kernel.org>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: Bharat Gooty <bharat.gooty@broadcom.com>,
Ray Jui <ray.jui@broadcom.com>,
devicetree <devicetree@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
Scott Branden <sbranden@broadcom.com>,
Ray Jui <rjui@broadcom.com>,
linux-arm-msm <linux-arm-msm@vger.kernel.org>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>,
Zhen Lei <thunder.leizhen@huawei.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2 1/2] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges
Date: Tue, 15 Dec 2020 16:49:10 +0100 [thread overview]
Message-ID: <CAK8P3a1TViQopQNFE4+Dtac0v2CneGiy22WYu5BuYv8HX2r8Lg@mail.gmail.com> (raw)
In-Reply-To: <c38cf11a-ed1d-d150-52fb-e3b4a0a30712@gmail.com>
On Tue, Dec 15, 2020 at 4:41 PM Florian Fainelli <f.fainelli@gmail.com> wrote:
>
> On 12/15/2020 5:19 AM, Bharat Gooty wrote:
> > Since the IOMMU is disabled and DMA engine is on 32-bit bus, We can not
> > give the complete DDR for the USB DMA.
> > So restricting the usable DAM size to 4GB.
>
> Thanks, can you make this a proper patch submission along with a Fixes:
> tag that is:
>
> Fixes: 2013a4b684b6 ("arm64: dts: broadcom: clear the warnings caused by
> empty dma-ranges")
Yes, that would be helpful, though I would appreciate a better description
that explains what is actually going on: is it the device or the bus that
has the 32-bit limitation, and if it is indeed a bug in the device, why do
you pretend that this is a 64-bit device on a 32-bit bus instead (this
could also use a comment in the dts file)?
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: devicetree <devicetree@vger.kernel.org>,
Bharat Gooty <bharat.gooty@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
Ray Jui <rjui@broadcom.com>,
Zhen Lei <thunder.leizhen@huawei.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Andy Gross <agross@kernel.org>, Ray Jui <ray.jui@broadcom.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-arm-msm <linux-arm-msm@vger.kernel.org>,
bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH v2 1/2] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges
Date: Tue, 15 Dec 2020 16:49:10 +0100 [thread overview]
Message-ID: <CAK8P3a1TViQopQNFE4+Dtac0v2CneGiy22WYu5BuYv8HX2r8Lg@mail.gmail.com> (raw)
In-Reply-To: <c38cf11a-ed1d-d150-52fb-e3b4a0a30712@gmail.com>
On Tue, Dec 15, 2020 at 4:41 PM Florian Fainelli <f.fainelli@gmail.com> wrote:
>
> On 12/15/2020 5:19 AM, Bharat Gooty wrote:
> > Since the IOMMU is disabled and DMA engine is on 32-bit bus, We can not
> > give the complete DDR for the USB DMA.
> > So restricting the usable DAM size to 4GB.
>
> Thanks, can you make this a proper patch submission along with a Fixes:
> tag that is:
>
> Fixes: 2013a4b684b6 ("arm64: dts: broadcom: clear the warnings caused by
> empty dma-ranges")
Yes, that would be helpful, though I would appreciate a better description
that explains what is actually going on: is it the device or the bus that
has the 32-bit limitation, and if it is indeed a bug in the device, why do
you pretend that this is a 64-bit device on a 32-bit bus instead (this
could also use a comment in the dts file)?
Arnd
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-12-15 15:50 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-16 9:08 [PATCH v2 0/2] eliminate two common errors reported by any yaml on arm64 Zhen Lei
2020-10-16 9:08 ` Zhen Lei
2020-10-16 9:08 ` [PATCH v2 1/2] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges Zhen Lei
2020-10-16 9:08 ` Zhen Lei
[not found] ` <CAK8P3a2TSmsNSi-XFpT6AQ3jvVxJ1AW7Uf5tAo477wtwXZwUzg@mail.gmail.com>
2020-10-16 16:48 ` Florian Fainelli
2020-10-16 16:48 ` Florian Fainelli
[not found] ` <CAK8P3a13ywHh7igdfDSPQz9Bw8YAnKWFLKARkk2NL5u6=6yb=w@mail.gmail.com>
2020-10-16 19:27 ` Florian Fainelli
2020-10-16 19:27 ` Florian Fainelli
2020-10-18 2:10 ` Leizhen (ThunderTown)
2020-10-18 2:10 ` Leizhen (ThunderTown)
2020-10-23 7:17 ` Arnd Bergmann
2020-10-26 2:21 ` Leizhen (ThunderTown)
2020-10-26 2:21 ` Leizhen (ThunderTown)
2020-11-09 6:18 ` Leizhen (ThunderTown)
2020-11-09 6:18 ` Leizhen (ThunderTown)
2020-11-09 17:28 ` Florian Fainelli
2020-11-09 17:28 ` Florian Fainelli
2020-11-09 17:56 ` Arnd Bergmann
2020-11-09 17:56 ` Arnd Bergmann
2020-11-09 18:00 ` Florian Fainelli
2020-11-09 18:00 ` Florian Fainelli
2020-11-28 4:53 ` Florian Fainelli
2020-11-28 4:53 ` Florian Fainelli
2020-11-28 9:58 ` Arnd Bergmann
2020-11-28 9:58 ` Arnd Bergmann
2020-12-14 19:09 ` Ray Jui
2020-12-14 19:09 ` Ray Jui
2020-12-14 19:46 ` Arnd Bergmann
2020-12-14 19:46 ` Arnd Bergmann
2020-12-15 15:40 ` Florian Fainelli
2020-12-15 15:40 ` Florian Fainelli
[not found] ` <CACvutz9v+TBUbrCo3X-u5ebbs04nR0y0yQN3qWfSAyZVy9RM2g@mail.gmail.com>
2020-12-15 15:41 ` Florian Fainelli
2020-12-15 15:41 ` Florian Fainelli
2020-12-15 15:49 ` Arnd Bergmann [this message]
2020-12-15 15:49 ` Arnd Bergmann
2021-01-12 18:28 ` Ray Jui
2021-01-12 18:28 ` Ray Jui
2021-01-12 20:40 ` Arnd Bergmann
2021-01-12 20:40 ` Arnd Bergmann
2021-01-12 20:57 ` Ray Jui
2021-01-12 20:57 ` Ray Jui
2021-01-13 3:42 ` Bharat Gooty
2021-01-13 3:42 ` Bharat Gooty
2021-01-13 8:05 ` Arnd Bergmann
2021-01-13 8:05 ` Arnd Bergmann
2021-01-13 16:55 ` Florian Fainelli
2021-01-13 16:55 ` Florian Fainelli
2021-01-13 17:45 ` Ray Jui
2021-01-13 17:45 ` Ray Jui
2020-10-16 9:08 ` [PATCH v2 2/2] arm64: dts: qcom: " Zhen Lei
2020-10-16 9:08 ` Zhen Lei
2020-11-11 4:44 ` Bjorn Andersson
2020-11-11 4:44 ` Bjorn Andersson
2020-12-29 20:15 ` [PATCH v2 0/2] eliminate two common errors reported by any yaml on arm64 patchwork-bot+linux-arm-msm
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