diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/812-pcie-0003-PCI-dwc-fix-the-msi-failure-after-pm-operations.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/812-pcie-0003-PCI-dwc-fix-the-msi-failure-after-pm-operations.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/812-pcie-0003-PCI-dwc-fix-the-msi-failure-after-pm-operations.patch b/target/linux/layerscape/patches-5.4/812-pcie-0003-PCI-dwc-fix-the-msi-failure-after-pm-operations.patch new file mode 100644 index 0000000000..235daca71c --- /dev/null +++ b/target/linux/layerscape/patches-5.4/812-pcie-0003-PCI-dwc-fix-the-msi-failure-after-pm-operations.patch @@ -0,0 +1,32 @@ +From f5db8274c8d6c86812fd2036ae49153d3ade3eaa Mon Sep 17 00:00:00 2001 +From: richard zhu <hongxing.zhu@nxp.com> +Date: Wed, 6 Nov 2019 15:11:36 +0800 +Subject: [PATCH] PCI: dwc: fix the msi failure after pm operations + +The controller may be powered off (Link is in L3) during the suspend +mode. The MSI_ADDR would be missed after resume and MSI function +would be failed. +Re-store MSI_ADDR to fix the MSI failure after PM operations. + +Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> +Acked-by: Fugang Duan <fugang.duan@nxp.com> +Acked-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> +--- + drivers/pci/controller/dwc/pcie-designware-host.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +--- a/drivers/pci/controller/dwc/pcie-designware-host.c ++++ b/drivers/pci/controller/dwc/pcie-designware-host.c +@@ -654,6 +654,12 @@ void dw_pcie_setup_rc(struct pcie_port * + dw_pcie_setup(pci); + + if (!pp->ops->msi_host_init) { ++ /* Program the msi_data */ ++ dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4, ++ lower_32_bits((u64)pp->msi_data)); ++ dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4, ++ upper_32_bits((u64)pp->msi_data)); ++ + num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL; + + /* Initialize IRQ Status array */ |