diff mbox series

[v18,14/15] pci: imx6: Add LUT setting for MSI/IOMMU in Endpoint mode

Message ID 20250414-ep-msi-v18-14-f69b49917464@nxp.com (mailing list archive)
State New
Headers show
Series PCI: EP: Add RC-to-EP doorbell with platform MSI controller | expand

Commit Message

Frank Li April 14, 2025, 6:31 p.m. UTC 
Support only one physical function, so call imx_pcie_add_lut_by_rid(0)
to add a single LUT entry when operating in EP mode.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
change from v14 to v16
- none

change from v13 to v14
- new patch
---
 drivers/pci/controller/dwc/pci-imx6.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index d1b1365e7469e..a6e4630fcf530 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -992,7 +992,10 @@  static int imx_pcie_add_lut(struct imx_pcie *imx_pcie, u16 rid, u8 sid)
 	data1 |= IMX95_PE0_LUT_VLD;
 	regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA1, data1);
 
-	data2 = IMX95_PE0_LUT_MASK; /* Match all bits of RID */
+	if (imx_pcie->drvdata->mode == DW_PCIE_EP_TYPE)
+		data2 = 0x7; /* EP side's RID from RC, only 'D' is meansful */
+	else
+		data2 = IMX95_PE0_LUT_MASK; /* Match all bits of RID */
 	data2 |= FIELD_PREP(IMX95_PE0_LUT_REQID, rid);
 	regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA2, data2);
 
@@ -1622,6 +1625,9 @@  static int imx_pcie_probe(struct platform_device *pdev)
 		ret = imx_add_pcie_ep(imx_pcie, pdev);
 		if (ret < 0)
 			return ret;
+
+		/* Only support one physical function */
+		imx_pcie_add_lut_by_rid(imx_pcie, 0);
 	} else {
 		pci->pp.use_atu_msg = true;
 		ret = dw_pcie_host_init(&pci->pp);