Hi, On Thu, Nov 24, 2011 at 11:57 AM, Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx> wrote: > Hi, > > I was wondering whether anyone had gotten MSI to work with Tegra2? The code > in arch/arm/mach-tegra/pcie.c has some comments saying that it currently > isn't supported. > > Looking through the Tegra2 TRM didn't show much related to MSI. In particular > there doesn't seem to be any mention of the AFI controller or any of it's > registers (except of how to enable/disable the AFI clock or reset the > controller). > > Furthermore I wasn't able to get PCIe to work on Harmony with a mainline > kernel. Is something missing or am I just doing something wrong? I think there might be an issue with regulator setup for pci-e, I got a vague bug report off-list from someone about it but I'm normally not using devices with pci-e on them myself. Note that trimslice does enable pci-e, so you can use that for comparison. > I can make > it work with the Vibrante kernel, but that doesn't have MSI support either. > Since we're looking at designing an evaluation board with PCIe support I'm > very interested in seeing this supported in mainline. If there's anything I > can do to help, please let me know. Also if anyone can provide more insight > than the TRM, that would be great. I have no idea if MSI is supported or not. You are aware of the errata list for PCI-e on Tegra though, right? You might want to consider the implications of said problems before you decide to use PCI-e on a product. On more MSI details; I suggest you try to get access to internal information through your Nvidia FAE -- I don't have any more information on it than you do but if I wanted to find out that is the route I would take myself. Regards, -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
