Assert PCI Configuration Enable bit after probe. When this bit is left to 0 in the endpoint mode, the RK3399 PCIe endpoint core will generate configuration request retry status (CRS) messages back to the root complex. Assert this bit after probe to allow the RK3399 PCIe endpoint core to reply to configuration requests from the root complex. This is documented in section 17.5.8.1.2 of the RK3399 TRM.

Fixes: cf590b078391 ("PCI: rockchip: Add EP driver for Rockchip PCIe controller") Cc: stable@vger.kernel.org Reviewed-by: Damien Le Moal dlemoal@kernel.org Tested-by: Damien Le Moal dlemoal@kernel.org Signed-off-by: Rick Wertenbroek rick.wertenbroek@gmail.com --- drivers/pci/controller/pcie-rockchip-ep.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 9b835377bd9e..d00baed65eba 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -623,6 +623,9 @@ static int rockchip_pcie_ep_probe(struct platform_device *pdev)

ep->irq_pci_addr = ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR;

+ rockchip_pcie_write(rockchip, PCIE_CLIENT_CONF_ENABLE, + PCIE_CLIENT_CONFIG); + return 0; err_epc_mem_exit: pci_epc_mem_exit(epc);