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Message-ID: <6cbe8202-7708-95b2-f9ac-1dbbc6991a9a@quicinc.com>
Date: Mon, 6 Nov 2023 17:29:34 +0530
From: Krishna Chaitanya Chundru <quic_krichai@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
<linux-arm-msm@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<quic_vbadigan@...cinc.com>, <quic_ramkri@...cinc.com>,
<quic_nitegupt@...cinc.com>, <quic_skananth@...cinc.com>,
<quic_vpernami@...cinc.com>, <quic_parass@...cinc.com>
Subject: Re: [PATCH 0/2] phy: qcom-qmp-pcie: Add support to keep refclk always
on
On 11/6/2023 5:28 PM, Dmitry Baryshkov wrote:
> On Mon, 6 Nov 2023 at 13:53, Krishna chaitanya chundru
> <quic_krichai@...cinc.com> 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.
Hi Dmitry,
This is not SOC level issue it is a board issue.
- Krishna Chaitanya.
>> 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@...cinc.com>
>> ---
>> 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@...cinc.com>
>>
>
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