linux-kernel - Re: [PATCH] arm64: defconfig: Enable PCI

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Message-ID: <wqravmnyudex3wcwhkbcbanxsqrmplpq5fmyueyaniya2dkqec@axu7nmb2xbbp>
Date: Thu, 30 Jan 2025 07:38:00 -0600
From: Andrew Halaney <ajhalaney@...il.com>
To: Nishanth Menon <nm@...com>
Cc: Daniel Schultz <D.Schultz@...tec.de>, 
	Andrew Halaney <ahalaney@...hat.com>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, Siddharth Vadapalli <s-vadapalli@...com>, 
	"vigneshr@...com" <vigneshr@...com>, "srk@...com" <srk@...com>, 
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: defconfig: Enable PCI_J721E

On Wed, Jan 22, 2025 at 08:58:22AM -0600, Nishanth Menon wrote:
> On 14:53-20250122, Daniel Schultz wrote:
> > can someone please apply this patch? It's actually required by all TI 
> > AM6 devices with PCIe, e.g. AM64x.
> > 
> > - Daniel
> > 
> > On 07.08.24 22:15, Andrew Halaney wrote:
> > > Enable PCI_J721E for usage in both host and endpoint modes.
> > > This is used by boards such as Texas Instrument's SK-AM69 and
> > > J784S4XEVM.
> > >
> > > Signed-off-by: Andrew Halaney <ahalaney@...hat.com>
> > Tested-By: Daniel Schultz <d.schultz@...tec.de>
> > > ---
> > >   arch/arm64/configs/defconfig | 2 ++
> > >   1 file changed, 2 insertions(+)
> > >
> > > diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> > > index 01dd286ba7ef0..e5222dbedd387 100644
> > > --- a/arch/arm64/configs/defconfig
> > > +++ b/arch/arm64/configs/defconfig
> > > @@ -225,6 +225,8 @@ CONFIG_PCIE_RCAR_HOST=y
> > >   CONFIG_PCIE_RCAR_EP=y
> > >   CONFIG_PCIE_ROCKCHIP_HOST=m
> > >   CONFIG_PCI_XGENE=y
> > > +CONFIG_PCI_J721E_HOST=y
> > > +CONFIG_PCI_J721E_EP=y
> > >   CONFIG_PCI_IMX6_HOST=y
> > >   CONFIG_PCI_LAYERSCAPE=y
> > >   CONFIG_PCI_HISI=y
> 
> please make them as modules. no point in growing the default Image file.
> 

The PCI_J721E_HOST config only supports builtin, which I think has
something to do with [0] (but I only re-skimmed that this morning
briefly). I don't have the hardware any more, so I can't test what goes
on if you make it a module etc unfortunately.

[0] https://lore.kernel.org/all/86o73j3vea.wl-maz@kernel.org/