| Message ID | 1699362294-15558-3-git-send-email-quic_msarkar@quicinc.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | arm64: qcom: sa8775p: add support for x4 EP PCIe controller | expand |
On 11/8/2023 3:24 AM, Konrad Dybcio wrote: > > > On 11/7/23 19:37, Andrew Halaney wrote: >> On Tue, Nov 07, 2023 at 06:34:53PM +0530, Mrinmay Sarkar wrote: >>> Add ep pcie dtsi node for pcie1 controller found on sa8775p platform. >>> It supports gen4 and x4 link width. Limiting the speed to Gen3 due to >>> stability issues. >> >> I wouldn't mind a bit more information on what "stability" issues >> entails! I'm a sucker for details in a commit message. > Yep, giving us a bit more than "doesnt work" may help us help you! Actually if I enable gen4 some time I am getting link down and sometime link getting establish at gen1. I am not getting stable gen4, may be we need to program some register to get stable gen4 that I am checking. >>> + >>> + interrupts = <GIC_SPI 518 IRQ_TYPE_LEVEL_HIGH>, >>> + <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>, >>> + <GIC_SPI 474 IRQ_TYPE_LEVEL_HIGH>; > Looks like the indentation is off? > >>> + >>> + interrupt-names = "global", "doorbell", "dma"; >>> + >>> + interconnects = <&pcie_anoc MASTER_PCIE_1 0 &mc_virt >>> SLAVE_EBI1 0>, >>> + <&gem_noc MASTER_APPSS_PROC 0 &config_noc >>> SLAVE_PCIE_1 0>; >> >> I keep seeing Konrad requesting that we use the #define instead of a raw >> number 0, i.e. something like QCOM_ICC_TAG_ALWAYS (although if I'm >> reading that correctly QCOM_ICC_TAG_ALWAYS doesn't evaluate to 0, so >> make sure you pick the appropriate one). > No it doesn't, but if you look at the code, tag being non-existent > assigns QCOM_ICC_TAG_ALWAYS which is a workaround for DTBs from back > when interconnect tags were not a thing > >> >>> + interconnect-names = "pcie-mem", "cpu-pcie"; >> >> This is nitpicky, but unless someone told you to do the whitespace >> between some of these properties I'd get more consistent. i.e. reg and >> reg-names has no newline between them, but clocks and clock-names does, >> and then interconnects/interconnect-names does not. > :) I don't think there is any rule to add those white spaces, in next patch I will align these white spaces with other pcie nodes. > > Konrad Thanks, Mrinmay
diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi index 7eab458..acd7bd8 100644 --- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi +++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi @@ -3732,6 +3732,54 @@ status = "disabled"; }; + pcie1_ep: pcie-ep@1c10000 { + compatible = "qcom,sa8775p-pcie-ep"; + reg = <0x0 0x01c10000 0x0 0x3000>, + <0x0 0x60000000 0x0 0xf20>, + <0x0 0x60000f20 0x0 0xa8>, + <0x0 0x60001000 0x0 0x4000>, + <0x0 0x60200000 0x0 0x100000>, + <0x0 0x01c13000 0x0 0x1000>, + <0x0 0x60005000 0x0 0x2000>; + reg-names = "parf", "dbi", "elbi", "atu", "addr_space", + "mmio", "dma"; + + clocks = <&gcc GCC_PCIE_1_AUX_CLK>, + <&gcc GCC_PCIE_1_CFG_AHB_CLK>, + <&gcc GCC_PCIE_1_MSTR_AXI_CLK>, + <&gcc GCC_PCIE_1_SLV_AXI_CLK>, + <&gcc GCC_PCIE_1_SLV_Q2A_AXI_CLK>; + + clock-names = "aux", + "cfg", + "bus_master", + "bus_slave", + "slave_q2a"; + + interrupts = <GIC_SPI 518 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 474 IRQ_TYPE_LEVEL_HIGH>; + + interrupt-names = "global", "doorbell", "dma"; + + interconnects = <&pcie_anoc MASTER_PCIE_1 0 &mc_virt SLAVE_EBI1 0>, + <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_PCIE_1 0>; + interconnect-names = "pcie-mem", "cpu-pcie"; + + dma-coherent; + + iommus = <&pcie_smmu 0x80 0x7f>; + resets = <&gcc GCC_PCIE_1_BCR>; + reset-names = "core"; + 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 */ + num-lanes = <4>; + + status = "disabled"; + }; + pcie1_phy: phy@1c14000 { compatible = "qcom,sa8775p-qmp-gen4x4-pcie-phy"; reg = <0x0 0x1c14000 0x0 0x4000>;
Add ep pcie dtsi node for pcie1 controller found on sa8775p platform. It supports gen4 and x4 link width. Limiting the speed to Gen3 due to stability issues. Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com> --- arch/arm64/boot/dts/qcom/sa8775p.dtsi | 48 +++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+)