Re: [PATCH] i.MX6 PCIe: Fix imx6_pcie_deassert_core_reset() polarity
From: Arnd Bergmann
Date: Tue Mar 29 2016 - 09:13:51 EST
On Tuesday 29 March 2016 12:55:21 Lucas Stach wrote:
> Am Dienstag, den 29.03.2016, 12:39 +0200 schrieb Krzysztof HaÅasa:
> > Lucas Stach <l.stach@xxxxxxxxxxxxxx> writes:
> > > Is this working with v4.4 and PCI_MSI enabled? I'm sure I've tested MSI
> > > IRQs before enabling them in the defconfig and they have been working
> > > for me for a long time before that. Tested with i210 on Gateworks
> > > Ventana.
> > MSI never worked for me on Ventana. I have been using 4.2 extensively,
> > and now I'm switching to 4.5 (which doesn't work either).
> > Could it be a DTS (bridge) problem(?)
> > On 4.5, trying to use it with TW6869 frame buffer and GW5410:
> > TW6869: PCI 0000:04:00.0, IRQ 336, MMIO 0x1100000
> > TW686x 0000:04:00.0: enabling device (0140 -> 0142)
> I don't see whee the device even tries to use MSI IRQs. Even if the
> infrastructure is enabled it opts to use legacy INTA.
It just never calls pci_enable_msi(), right? MSI is purely opt-in
for the driver, but it should just work if the device supports it
and you add that call.