From: Ioana Ciornei <ioana.ciornei@nxp.com>
To: Sean Anderson <sean.anderson@seco.com>
Cc: Kishon Vijay Abraham I <kishon@kernel.org>,
devicetree@vger.kernel.org, Bagas Sanjaya <bagasdotme@gmail.com>,
Madalin Bucur <madalin.bucur@nxp.com>,
Shawn Guo <shawnguo@kernel.org>, Li Yang <leoyang.li@nxp.com>,
Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Camelia Alexandra Groza <camelia.groza@nxp.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
linux-phy@lists.infradead.org, linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v12 13/13] arm64: dts: ls1088ardb: Add serdes descriptions
Date: Tue, 28 Mar 2023 12:25:41 +0300 [thread overview]
Message-ID: <20230328092541.og7mexyh4espbh6t@LXL00007.wbi.nxp.com> (raw)
In-Reply-To: <5ca4aeba-db2c-4c0c-c620-d380b4b839bb@seco.com>
On Mon, Mar 27, 2023 at 02:15:47PM -0400, Sean Anderson wrote:
> On 3/24/23 09:17, Ioana Ciornei wrote:
> > On Tue, Mar 21, 2023 at 04:13:12PM -0400, Sean Anderson wrote:
> >> This adds serdes support to the LS1088ARDB. I have tested the QSGMII
> >> ports as well as the two 10G ports. The SFP slot is now fully supported,
> >> instead of being modeled as a fixed-link.
> >>
> >> Linux hangs around when the serdes is initialized if the si5341 is
> >> enabled with the in-tree driver, so I have modeled it as a two fixed
> >> clocks instead. There are a few registers in the QIXIS FPGA which
> >> control the SFP GPIOs; I have modeled them as discrete GPIO controllers
> >> for now. I never saw the AQR105 interrupt fire; not sure what was going
> >> on, but I have removed it to force polling.
> >
> > So you didn't see the interrupt fire even without these patches?
>
> Not sure. I went to check this, and discovered I could no longer get the
> link to come up in Linux, even on v6.0 (before the rate adaptation
> tuff). I see the LEDs blinking in U-Boot, so presumably it's some
> configuration problem. I'm going to look into this further when I have
> more time.
>
> > I just tested this on a LS1088ARDB and it works.
> >
> > root@localhost:~# cat /proc/interrupts | grep extirq
> > 99: 5 ls-extirq 2 Level 0x0000000008b97000:00
> > root@localhost:~# ip link set dev endpmac2 up
> > root@localhost:~# cat /proc/interrupts | grep extirq
> > 99: 6 ls-extirq 2 Level 0x0000000008b97000:00
> > root@localhost:~# ip link set dev endpmac2 down
> > root@localhost:~# cat /proc/interrupts | grep extirq
> > 99: 7 ls-extirq 2 Level 0x0000000008b97000:00
> >
> > Please don't just remove things.
>
> Well, polling isn't the worst thing for a single interface... I do
> remember having a problem with the interrupt. If this series works
> with interrupts enabled, I can leave it in.
>
> Did you have a chance to look at the core (patches 7 and 8) of this
> series? Does it make sense to you? Am I missing something which would
> allow switching from 1G->10G?
>
For a bit of context, I also attempted dynamic switching from 1G to 10G
on my own even before this patch set but I did not get a link up on the
PCS (CDR lock was there through). Pretty much the same state as you.
What I propose is to take this whole endeavor step by step.
I am also interrested in getting this feature to actually work but I
just didn't have the time to investigate in depth was is missing.
And without the dynamic switching I cannot say that I find the addition
of the SerDes PHY driver useful.
I have the Lynx 10G on my TODO list but I still have some other tasks
on the Lynx 28G for the next 2-3 weeks. Once I get those done, I will
look closer at the patches.
In the meantime, some small thigs from this patch set can be submitted
separately. For example, describing the SFP cage on the LS1088ARDB.
I still have some small questions on the DTS implementation for the gpio
controllers but I would be able to submit this myself if you do not find
the time (with your authorship of course).
Ioana
next prev parent reply other threads:[~2023-03-28 9:27 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 20:12 [PATCH v12 00/13] phy: Add support for Lynx 10G SerDes Sean Anderson
2023-03-21 20:13 ` [PATCH v12 01/13] dt-bindings: phy: Add 2500BASE-X and 10GBASE-R Sean Anderson
2023-03-21 20:13 ` [PATCH v12 02/13] dt-bindings: phy: Add Lynx 10G phy binding Sean Anderson
2023-03-21 20:13 ` [PATCH v12 03/13] dt-bindings: Convert gpio-mmio to yaml Sean Anderson
2023-03-21 20:19 ` Sean Anderson
2023-03-21 22:33 ` Rob Herring
2023-03-21 20:13 ` [PATCH v12 04/13] dt-bindings: gpio-mmio: Add compatible for QIXIS Sean Anderson
2023-03-21 20:13 ` [PATCH v12 05/13] dt-bindings: clock: Add ids for Lynx 10g PLLs Sean Anderson
2023-03-21 20:13 ` [PATCH v12 06/13] clk: Add Lynx 10G SerDes PLL driver Sean Anderson
2023-03-21 20:13 ` [PATCH v12 07/13] phy: fsl: Add Lynx 10G SerDes driver Sean Anderson
2023-03-21 20:13 ` [PATCH v12 08/13] phy: lynx10g: Enable by default on Layerscape Sean Anderson
2023-03-21 20:13 ` [PATCH v12 09/13] arm64: dts: ls1046a: Add serdes nodes Sean Anderson
2023-03-21 20:13 ` [PATCH v12 10/13] arm64: dts: ls1046ardb: Add serdes descriptions Sean Anderson
2023-03-21 20:13 ` [PATCH v12 11/13] arm64: dts: ls1088a: Add serdes nodes Sean Anderson
2023-03-21 20:13 ` [PATCH v12 12/13] arm64: dts: ls1088a: Prevent PCSs from probing as phys Sean Anderson
2023-03-21 20:13 ` [PATCH v12 13/13] arm64: dts: ls1088ardb: Add serdes descriptions Sean Anderson
2023-03-24 13:17 ` Ioana Ciornei
2023-03-27 18:15 ` Sean Anderson
2023-03-27 19:56 ` Sean Anderson
2023-03-28 9:25 ` Ioana Ciornei [this message]
2023-03-28 14:40 ` Sean Anderson
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