linux-kernel - [PATCH 2/2] arm64: dts: qcom: sa8775p: Set max link speed to Gen4 for PCIe EP

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Message-Id: <20250423-update_phy-v1-2-30eb51703bb8@oss.qualcomm.com>
Date: Wed, 23 Apr 2025 16:45:44 +0530
From: Mrinmay Sarkar <mrinmay.sarkar@....qualcomm.com>
To: Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        krishna.chundru@....qualcomm.com, quic_vbadigan@...cinc.com,
        quic_nayiluri@...cinc.com, quic_ramkri@...cinc.com,
        quic_nitegupt@...cinc.com,
        Mrinmay Sarkar <mrinmay.sarkar@....qualcomm.com>
Subject: [PATCH 2/2] arm64: dts: qcom: sa8775p: Set max link speed to Gen4
 for PCIe EP

The maximum link speed was previously restricted to Gen3 due to
the absence of Gen4 equalization support in the driver.

Add this change to set the maximum link speed to Gen4, as Gen4
equalization support has now been added into the driver.

Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/sa8775p.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
index 5bd0c03476b143444543c68cd1c1d475c3302555..65d9433a298f80eb782439120ad9c3c74025b441 100644
--- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
+++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
@@ -6462,7 +6462,7 @@ pcie0_ep: pcie-ep@...0000 {
 		power-domains = <&gcc PCIE_0_GDSC>;
 		phys = <&pcie0_phy>;
 		phy-names = "pciephy";
-		max-link-speed = <3>; /* FIXME: Limiting the Gen speed due to stability issues */
+		max-link-speed = <4>;
 		num-lanes = <2>;
 		linux,pci-domain = <0>;
 
@@ -6620,7 +6620,7 @@ pcie1_ep: pcie-ep@...0000 {
 		power-domains = <&gcc PCIE_1_GDSC>;
 		phys = <&pcie1_phy>;
 		phy-names = "pciephy";
-		max-link-speed = <3>; /* FIXME: Limiting the Gen speed due to stability issues */
+		max-link-speed = <4>;
 		num-lanes = <4>;
 		linux,pci-domain = <1>;
 

-- 
2.25.1