On Thu, Aug 29, 2024 at 05:00:05PM -0500, Bjorn Helgaas wrote:
> 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.
I think it needn't special code to handle this. in dts
interrupt-map = <0 0 0 1 &gic GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
<0 0 0 2 &gic GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
<0 0 0 3 &gic GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>,
<0 0 0 4 &gic GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
It map INT(A,B,C,D) to 4 GIC irq.
Frank
>
> Bjorn
