Re: [PATCH 0/2] phy: qcom-qmp-pcie: Add support to keep refclk always on

[Dmitry Baryshkov]

On Mon, 6 Nov 2023 at 13:53, Krishna chaitanya chundru
<quic_krichai@xxxxxxxxxxx> wrote:
>
> This series adds support to provide refclk to endpoint even in low
> power states.
>
> Due to some platform specific issues with CLKREQ signal, it is not being
> propagated to the host and as host doesn't know the clkreq signal host is
> not sending refclk. Due to this endpoint is seeing linkdown and going
> to bad state.

Is this a board issue or an SoC issue? In the latter case this should
go to the PHY configuration structure instead of being specified in
the DT.

> To avoid those ref clk should be provided always to the endpoint. The
> issue is coming only when ep intiates the L1.1 or L1.2 exit and clkreq
> is not being propagated properly to the host.
>
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
> ---
> Krishna chaitanya chundru (2):
>       dt-bindings: phy: qcom,qmp: Add PCIe qcom,refclk-always-on property
>       phy: qcom-qmp-pcie: Add support for keeping refclk always on
>
>  .../bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml    |  5 +++++
>  drivers/phy/qualcomm/phy-qcom-qmp-pcie.c            | 21 +++++++++++++++++----
>  2 files changed, 22 insertions(+), 4 deletions(-)
> ---
> base-commit: 71e68e182e382e951d6248bccc3c960dcec5a718
> change-id: 20231106-refclk_always_on-9beae8297cb8
>
> Best regards,
> --
> Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
>


-- 
With best wishes
Dmitry