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From: Bjorn Helgaas <helgaas@kernel.org>
To: Frank Li <Frank.li@nxp.com>
Cc: Tim Harvey <tharvey@gateworks.com>,
	Richard Zhu <hongxing.zhu@nxp.com>,
	Lucas Stach <l.stach@pengutronix.de>,
	linux-pci@vger.kernel.org
Subject: Re: legacy PCI device behind a bridge not getting a valid IRQ on imx host controller
Date: Thu, 29 Aug 2024 17:00:05 -0500	[thread overview]
Message-ID: <20240829220005.GA81596@bhelgaas> (raw)
In-Reply-To: <ZtDrjl3b8yhumk+A@lizhi-Precision-Tower-5810>

On Thu, Aug 29, 2024 at 05:43:42PM -0400, Frank Li wrote:
> On Thu, Aug 29, 2024 at 04:22:35PM -0500, Bjorn Helgaas wrote:
> > On Wed, Aug 28, 2024 at 02:40:33PM -0700, Tim Harvey wrote:
> > > Greetings,
> > >
> > > I have a user that is using an IMX8MM SoC (dwc controller) with a
> > > miniPCIe card that has a PEX8112 PCI-to-PCIe bridge to a legacy PCI
> > > device and the device is not getting a valid interrupt.
> >
> > Does pci-imx6.c support INTx at all?
> 
> Yes, dwc controller map INTx message to 4 irq lines, which connect to GIC.
> we tested it by add nomsi in kernel command line.

Thanks, Frank.  Can you point me to the dwc code where this happens?
Maybe I can remember this for next time or add a comment to help
people find it.

Bjorn

  reply	other threads:[~2024-08-29 22:00 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-28 21:40 legacy PCI device behind a bridge not getting a valid IRQ on imx host controller Tim Harvey
2024-08-29 21:22 ` Bjorn Helgaas
2024-08-29 21:43   ` Frank Li
2024-08-29 22:00     ` Bjorn Helgaas [this message]
2024-08-29 22:21       ` Tim Harvey
2024-08-30 15:52         ` Frank Li
2024-08-30 16:11           ` Tim Harvey
2024-08-30 15:49       ` Frank Li
2024-08-30 16:06         ` Manivannan Sadhasivam
2024-08-30 16:15         ` Bjorn Helgaas
2024-08-30  1:50   ` Hongxing Zhu
2024-08-30 16:03     ` Tim Harvey
2024-08-30 16:14       ` Frank Li
2024-09-06 19:37         ` Tim Harvey
2024-09-06 19:58           ` Bjorn Helgaas
2024-09-10 16:50             ` Tim Harvey
2024-09-10 23:04               ` Bjorn Helgaas
2024-09-12 23:28                 ` Tim Harvey
2024-09-23 17:56                   ` Tim Harvey
2024-09-26 22:30                     ` Bjorn Helgaas

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