linux-kernel - Re: [PATCH v4 RESEND 0/8] ipq9574: Enable PCI-Express support

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Date: Wed, 8 May 2024 11:46:40 +0530
From: Devi Priya <quic_devipriy@...cinc.com>
To: Alexandru Gagniuc <mr.nuke.me@...il.com>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Lorenzo
 Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński
	<kw@...ux.com>,
        Rob Herring <robh@...nel.org>, Bjorn Helgaas
	<bhelgaas@...gle.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I
	<kishon@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen
 Boyd <sboyd@...nel.org>,
        Manivannan Sadhasivam
	<manivannan.sadhasivam@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <linux-clk@...r.kernel.org>
Subject: Re: [PATCH v4 RESEND 0/8] ipq9574: Enable PCI-Express support



On 5/1/2024 9:58 AM, Alexandru Gagniuc wrote:
> There are four PCIe ports on IPQ9574, pcie0 thru pcie3. This series
> addresses pcie2, which is a gen3x2 port. The board I have only uses
> pcie2, and that's the only one enabled in this series. pcie3 is added
> as a special request, but is untested.
> 
> I believe this makes sense as a monolithic series, as the individual
> pieces are not that useful by themselves.

Hi Alexandru,

As Dmitry suggested, we are working on enabling the PCIe NOC clocks
via Interconnect. We will be posting the PCIe series with
Interconnect support [1] shortly.

[1] - 
https://lore.kernel.org/linux-arm-msm/20240430064214.2030013-1-quic_varada@quicinc.com/

Thanks,
S.Devi Priya
> 
> In v2, I've had some issues regarding the dt schema checks. For
> transparency, I used the following test invocations to test:
> 
>        make dt_binding_check     DT_SCHEMA_FILES=qcom,pcie.yaml:qcom,ipq8074-qmp-pcie-phy.yaml
>        make dtbs_check           DT_SCHEMA_FILES=qcom,pcie.yaml:qcom,ipq8074-qmp-pcie-phy.yaml
> 
> Changes since v3:
>   - "const"ify .hw.init fields for the PCIE pipe clocks
>   - Used pciephy_v5_regs_layout instead of v4 in phy-qcom-qmp-pcie.c
>   - Included Manivannan's patch for qcom-pcie.c clocks
>   - Dropped redundant comments in "ranges" and "interrupt-map" of pcie2.
>   - Added pcie3 and pcie3_phy dts nodes
>   - Moved snoc and anoc clocks to PCIe controller from PHY
> 
> Changes since v2:
>   - reworked resets in qcom,pcie.yaml to resolve dt schema errors
>   - constrained "reg" in qcom,pcie.yaml
>   - reworked min/max intems in qcom,ipq8074-qmp-pcie-phy.yaml
>   - dropped msi-parent for pcie node, as it is handled by "msi" IRQ
> 
> Changes since v1:
>   - updated new tables in phy-qcom-qmp-pcie.c to use lowercase hex numbers
>   - reorganized qcom,ipq8074-qmp-pcie-phy.yaml to use a single list of clocks
>   - reorganized qcom,pcie.yaml to include clocks+resets per compatible
>   - Renamed "pcie2_qmp_phy" label to "pcie2_phy"
>   - moved "ranges" property of pcie@...00000 higher up
> 
> Alexandru Gagniuc (7):
>    dt-bindings: clock: Add PCIe pipe related clocks for IPQ9574
>    clk: qcom: gcc-ipq9574: Add PCIe pipe clocks
>    dt-bindings: PCI: qcom: Add IPQ9574 PCIe controller
>    PCI: qcom: Add support for IPQ9574
>    dt-bindings: phy: qcom,ipq8074-qmp-pcie: add ipq9574 gen3x2 PHY
>    phy: qcom-qmp-pcie: add support for ipq9574 gen3x2 PHY
>    arm64: dts: qcom: ipq9574: add PCIe2 and PCIe3 nodes
> 
> Manivannan Sadhasivam (1):
>    PCI: qcom: Switch to devm_clk_bulk_get_all() API to get the clocks
>      from Devicetree
> 
>   .../devicetree/bindings/pci/qcom,pcie.yaml    |  37 ++++
>   .../phy/qcom,ipq8074-qmp-pcie-phy.yaml        |   1 +
>   arch/arm64/boot/dts/qcom/ipq9574.dtsi         | 178 +++++++++++++++++-
>   drivers/clk/qcom/gcc-ipq9574.c                |  76 ++++++++
>   drivers/pci/controller/dwc/pcie-qcom.c        | 164 +++-------------
>   drivers/phy/qualcomm/phy-qcom-qmp-pcie.c      | 136 ++++++++++++-
>   .../phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5.h   |  14 ++
>   include/dt-bindings/clock/qcom,ipq9574-gcc.h  |   4 +
>   8 files changed, 469 insertions(+), 141 deletions(-)
>