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Message-ID: <aN22lamy86iesAJj@hu-bjorande-lv.qualcomm.com>
Date: Wed, 1 Oct 2025 16:37:01 -0700
From: Bjorn Andersson <bjorn.andersson@....qualcomm.com>
To: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Cc: Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
Krzysztof Wilczyński <kwilczynski@...nel.org>,
Manivannan Sadhasivam <mani@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
quic_vbadigan@...cinc.com, quic_mrana@...cinc.com
Subject: Re: [PATCH v3 2/3] arm64: dts: qcom: sm8750: Add PCIe PHY and
controller node
On Tue, Aug 26, 2025 at 04:32:54PM +0530, Krishna Chaitanya Chundru wrote:
> Add PCIe controller and PHY nodes which supports data rates of 8GT/s
> and x2 lane.
>
I tried to boot the upstream kernel (next-20250925 defconfig) on my
Pakala MTP with latest LA1.0 META and unless I disable &pcie0 the device
is crashing during boot as PCIe is being probed.
Is this a known problem? Is there any workaround/changes in flight that
I'm missing?
Regards,
Bjorn
> Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> ---
> arch/arm64/boot/dts/qcom/sm8750.dtsi | 180 ++++++++++++++++++++++++++++++++++-
> 1 file changed, 179 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> index 4643705021c6ca095a16d8d7cc3adac920b21e82..b47668a64bcead3e48f58eeb2e41c04660493cb7 100644
> --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> @@ -631,7 +631,7 @@ gcc: clock-controller@...000 {
> clocks = <&bi_tcxo_div2>,
> <0>,
> <&sleep_clk>,
> - <0>,
> + <&pcie0_phy>,
> <0>,
> <0>,
> <0>,
> @@ -3304,6 +3304,184 @@ gic_its: msi-controller@...40000 {
> };
> };
>
> + pcie0: pcie@...0000 {
> + device_type = "pci";
> + compatible = "qcom,pcie-sm8750", "qcom,pcie-sm8550";
> + reg = <0x0 0x01c00000 0x0 0x3000>,
> + <0x0 0x40000000 0x0 0xf1d>,
> + <0x0 0x40000f20 0x0 0xa8>,
> + <0x0 0x40001000 0x0 0x1000>,
> + <0x0 0x40100000 0x0 0x100000>,
> + <0x0 0x01C03000 0x0 0x1000>;
> + reg-names = "parf",
> + "dbi",
> + "elbi",
> + "atu",
> + "config",
> + "mhi";
> +
> + #address-cells = <3>;
> + #size-cells = <2>;
> + ranges = <0x01000000 0x0 0x00000000 0x0 0x40200000 0x0 0x100000>,
> + <0x02000000 0x0 0x40300000 0x0 0x40300000 0x0 0x23d00000>,
> + <0x03000000 0x4 0x00000000 0x4 0x00000000 0x3 0x00000000>;
> + bus-range = <0x00 0xff>;
> +
> + dma-coherent;
> +
> + linux,pci-domain = <0>;
> +
> + msi-map = <0x0 &gic_its 0x1400 0x1>,
> + <0x100 &gic_its 0x1401 0x1>;
> + msi-map-mask = <0xff00>;
> +
> + num-lanes = <2>;
> +
> + interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "msi0",
> + "msi1",
> + "msi2",
> + "msi3",
> + "msi4",
> + "msi5",
> + "msi6",
> + "msi7",
> + "global";
> +
> + #interrupt-cells = <1>;
> + interrupt-map-mask = <0 0 0 0x7>;
> + interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>,
> + <0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>,
> + <0 0 0 3 &intc 0 0 0 151 IRQ_TYPE_LEVEL_HIGH>,
> + <0 0 0 4 &intc 0 0 0 152 IRQ_TYPE_LEVEL_HIGH>;
> +
> + clocks = <&gcc GCC_PCIE_0_AUX_CLK>,
> + <&gcc GCC_PCIE_0_CFG_AHB_CLK>,
> + <&gcc GCC_PCIE_0_MSTR_AXI_CLK>,
> + <&gcc GCC_PCIE_0_SLV_AXI_CLK>,
> + <&gcc GCC_PCIE_0_SLV_Q2A_AXI_CLK>,
> + <&gcc GCC_DDRSS_PCIE_SF_QTB_CLK>,
> + <&gcc GCC_AGGRE_NOC_PCIE_AXI_CLK>,
> + <&gcc GCC_CNOC_PCIE_SF_AXI_CLK>;
> + clock-names = "aux",
> + "cfg",
> + "bus_master",
> + "bus_slave",
> + "slave_q2a",
> + "ddrss_sf_tbu",
> + "noc_aggr",
> + "cnoc_sf_axi";
> +
> + interconnects = <&pcie_noc MASTER_PCIE_0 QCOM_ICC_TAG_ALWAYS
> + &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
> + <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ALWAYS
> + &cnoc_main SLAVE_PCIE_0 QCOM_ICC_TAG_ALWAYS>;
> + interconnect-names = "pcie-mem",
> + "cpu-pcie";
> +
> + iommu-map = <0x0 &apps_smmu 0x1400 0x1>,
> + <0x100 &apps_smmu 0x1401 0x1>;
> +
> + resets = <&gcc GCC_PCIE_0_BCR>;
> + reset-names = "pci";
> +
> + power-domains = <&gcc GCC_PCIE_0_GDSC>;
> +
> + operating-points-v2 = <&pcie0_opp_table>;
> +
> + status = "disabled";
> +
> + pcie0_opp_table: opp-table {
> + compatible = "operating-points-v2";
> +
> + /* GEN 1 x1 */
> + opp-2500000 {
> + opp-hz = /bits/ 64 <2500000>;
> + required-opps = <&rpmhpd_opp_low_svs>;
> + opp-peak-kBps = <250000 1>;
> + };
> +
> + /* GEN 1 x2 and GEN 2 x1 */
> + opp-5000000 {
> + opp-hz = /bits/ 64 <5000000>;
> + required-opps = <&rpmhpd_opp_low_svs>;
> + opp-peak-kBps = <500000 1>;
> + };
> +
> + /* GEN 2 x2 */
> + opp-10000000 {
> + opp-hz = /bits/ 64 <10000000>;
> + required-opps = <&rpmhpd_opp_low_svs>;
> + opp-peak-kBps = <1000000 1>;
> + };
> +
> + /* GEN 3 x1 */
> + opp-8000000 {
> + opp-hz = /bits/ 64 <8000000>;
> + required-opps = <&rpmhpd_opp_nom>;
> + opp-peak-kBps = <984500 1>;
> + };
> +
> + /* GEN 3 x2 */
> + opp-16000000 {
> + opp-hz = /bits/ 64 <16000000>;
> + required-opps = <&rpmhpd_opp_nom>;
> + opp-peak-kBps = <1969000 1>;
> + };
> +
> + };
> +
> + pcieport0: pcie@0 {
> + device_type = "pci";
> + reg = <0x0 0x0 0x0 0x0 0x0>;
> + bus-range = <0x01 0xff>;
> +
> + #address-cells = <3>;
> + #size-cells = <2>;
> + ranges;
> + phys = <&pcie0_phy>;
> + };
> + };
> +
> + pcie0_phy: phy@...6000 {
> + compatible = "qcom,sm8750-qmp-gen3x2-pcie-phy";
> + reg = <0 0x01c06000 0 0x2000>;
> +
> + clocks = <&gcc GCC_PCIE_0_AUX_CLK>,
> + <&gcc GCC_PCIE_0_CFG_AHB_CLK>,
> + <&tcsrcc TCSR_PCIE_0_CLKREF_EN>,
> + <&gcc GCC_PCIE_0_PHY_RCHNG_CLK>,
> + <&gcc GCC_PCIE_0_PIPE_CLK>;
> + clock-names = "aux",
> + "cfg_ahb",
> + "ref",
> + "rchng",
> + "pipe";
> +
> + assigned-clocks = <&gcc GCC_PCIE_0_PHY_RCHNG_CLK>;
> + assigned-clock-rates = <100000000>;
> +
> + resets = <&gcc GCC_PCIE_0_PHY_BCR>;
> + reset-names = "phy";
> +
> + power-domains = <&gcc GCC_PCIE_0_PHY_GDSC>;
> +
> + #clock-cells = <0>;
> + clock-output-names = "pcie0_pipe_clk";
> +
> + #phy-cells = <0>;
> +
> + status = "disabled";
> + };
> +
> ufs_mem_phy: phy@...0000 {
> compatible = "qcom,sm8750-qmp-ufs-phy";
> reg = <0x0 0x01d80000 0x0 0x2000>;
>
> --
> 2.34.1
>
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