From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Manikanta Maddireddy Subject: [PATCH V2 20/28] PCI: tegra: Use legacy irq for port service drivers Date: Tue, 23 Apr 2019 14:58:17 +0530 Message-ID: <20190423092825.759-21-mmaddireddy@nvidia.com> In-Reply-To: <20190423092825.759-1-mmaddireddy@nvidia.com> References: <20190423092825.759-1-mmaddireddy@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain To: thierry.reding@gmail.com, bhelgaas@google.com, robh+dt@kernel.org, mark.rutland@arm.com, jonathanh@nvidia.com, lorenzo.pieralisi@arm.com, vidyas@nvidia.com Cc: linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, Manikanta Maddireddy List-ID: Tegra signals PCIe services like AER, PME, etc over legacy IRQ line. By default, service drivers register interrupt routine over MSI IRQ line. Use pcie_pme_disable_msi() function to disable MSI for service drivers. PME and AER interrupts registered to MSI without this change, cat /proc/interrupts | grep -i pci 36: 21 0 0 0 0 0 GICv2 104 Level PCIE 37: 35 0 0 0 0 0 GICv2 105 Level Tegra PCIe MSI 76: 0 0 0 0 0 0 Tegra PCIe MSI 0 Edge PCIe PME, aerdrv, PCIe BW notif PME and AER interrupts registered to legacy IRQ with this change, cat /proc/interrupts | grep -i pci 36: 33 0 0 0 0 0 GICv2 104 Level PCIE, PCIe PME, aerdrv, PCIe BW notif 37: 52 0 0 0 0 0 GICv2 105 Level Tegra PCIe MSI Signed-off-by: Manikanta Maddireddy --- V2: No change drivers/pci/controller/pci-tegra.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c index 72634ce6d3da..edc6a0f27397 100644 --- a/drivers/pci/controller/pci-tegra.c +++ b/drivers/pci/controller/pci-tegra.c @@ -41,6 +41,7 @@ #include #include "../pci.h" +#include "../pcie/portdrv.h" #define INT_PCI_MSI_NR (8 * 32) @@ -2721,6 +2722,9 @@ static int tegra_pcie_probe(struct platform_device *pdev) goto put_resources; } + /* Switch to legacy IRQ for PCIe services like AER, PME*/ + pcie_pme_disable_msi(); + pm_runtime_enable(pcie->dev); err = pm_runtime_get_sync(pcie->dev); if (err) { -- 2.17.1