linux-kernel - [PATCH v2] PCI: dw-rockchip: Enable async probe by default

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Message-ID: <20240809073610.2517-1-linux.amoon@gmail.com>
Date: Fri,  9 Aug 2024 13:06:09 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Heiko Stuebner <heiko@...ech.de>
Cc: Anand Moon <linux.amoon@...il.com>,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] PCI: dw-rockchip: Enable async probe by default

Rockchip DWC PCIe driver currently waits for the combo PHY link
(PCIe 3.0, PCIe 2.0, and SATA 3.0) to be established link training
during boot, it also waits for the link to be up, which could consume
several milliseconds during boot.

To optimize boot time, this commit allows asynchronous probing.
This change enables the PCIe link establishment to occur in the
background while other devices are being probed.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v2: update the commit message to describe the changs.
---
 drivers/pci/controller/dwc/pcie-dw-rockchip.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
index 1170e1107508..7a895b66e4e4 100644
--- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
+++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
@@ -616,6 +616,7 @@ static struct platform_driver rockchip_pcie_driver = {
 		.name	= "rockchip-dw-pcie",
 		.of_match_table = rockchip_pcie_of_match,
 		.suppress_bind_attrs = true,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.probe = rockchip_pcie_probe,
 };

base-commit: ee9a43b7cfe2d8a3520335fea7d8ce71b8cabd9d
-- 
2.44.0