From: Bjorn Helgaas <helgaas@kernel.org>
To: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Cc: andersson@kernel.org, "Bjorn Helgaas" <bhelgaas@google.com>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Konrad Dybcio" <konradybcio@kernel.org>,
cros-qcom-dts-watchers@chromium.org,
"Jingoo Han" <jingoohan1@gmail.com>,
"Bartosz Golaszewski" <brgl@bgdev.pl>,
quic_vbadigan@quicinc.com, linux-arm-msm@vger.kernel.org,
linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 5/6] PCI: qcom: Add support for host_stop_link() & host_start_link()
Date: Tue, 12 Nov 2024 17:36:09 -0600 [thread overview]
Message-ID: <20241112233609.GA1868317@bhelgaas> (raw)
In-Reply-To: <20241112-qps615_pwr-v3-5-29a1e98aa2b0@quicinc.com>
On Tue, Nov 12, 2024 at 08:31:37PM +0530, Krishna chaitanya chundru wrote:
> For the switches like QPS615 which needs to configure it before
> the PCIe link is established.
>
> If the link is up, the boatloader might powered and configured the
> endpoint/switch already. In that case don't touch PCIe link else
> assert the PERST# and disable LTSSM bit so that PCIe controller
> will not participate in the link training as part of host_stop_link().
s/boatloader/bootloader/
s/might powered/might have powered/ ?
> De-assert the PERST# and enable LTSSM bit back in host_start_link().
>
> Introduce ltssm_disable function op to stop the link training.
next prev parent reply other threads:[~2024-11-12 23:36 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-12 15:01 [PATCH v3 0/6] PCI: Enable Power and configure the QPS615 PCIe switch Krishna chaitanya chundru
2024-11-12 15:01 ` [PATCH v3 1/6] dt-bindings: PCI: Add binding for qps615 Krishna chaitanya chundru
2024-11-12 15:49 ` Bjorn Andersson
2024-11-15 16:18 ` Rob Herring
2024-11-24 1:32 ` Krishna Chaitanya Chundru
2024-12-04 8:49 ` Krishna Chaitanya Chundru
2024-12-23 16:45 ` Krishna Chaitanya Chundru
2025-02-10 7:51 ` Manivannan Sadhasivam
2025-02-10 9:37 ` Krishna Chaitanya Chundru
2024-12-23 18:57 ` Dmitry Baryshkov
2024-12-24 6:04 ` Krishna Chaitanya Chundru
2024-12-24 6:54 ` Dmitry Baryshkov
2024-12-24 9:09 ` Krishna Chaitanya Chundru
2024-12-24 9:47 ` Dmitry Baryshkov
2024-12-27 2:14 ` Krishna Chaitanya Chundru
2024-12-30 18:30 ` Dmitry Baryshkov
2024-12-30 18:22 ` Manivannan Sadhasivam
2025-01-07 14:28 ` Krishna Chaitanya Chundru
2025-02-10 7:58 ` Manivannan Sadhasivam
2025-02-10 10:13 ` Krishna Chaitanya Chundru
2024-11-20 8:04 ` Krzysztof Kozlowski
2024-11-24 1:41 ` Krishna Chaitanya Chundru
2024-11-25 7:40 ` Krzysztof Kozlowski
2024-11-26 6:50 ` Krishna Chaitanya Chundru
2024-11-26 6:58 ` Krzysztof Kozlowski
2024-11-28 13:24 ` Manivannan Sadhasivam
2024-11-28 14:08 ` Dmitry Baryshkov
2024-12-03 9:06 ` Krishna Chaitanya Chundru
2024-12-04 21:25 ` Bjorn Helgaas
2024-12-11 6:00 ` Manivannan Sadhasivam
2024-12-23 16:48 ` Krishna Chaitanya Chundru
2024-12-23 18:58 ` Dmitry Baryshkov
2024-12-24 9:11 ` Krishna Chaitanya Chundru
2024-12-24 9:49 ` Dmitry Baryshkov
2025-01-07 22:42 ` Bjorn Helgaas
2025-01-15 17:23 ` Manivannan Sadhasivam
2024-11-12 15:01 ` [PATCH v3 2/6] arm64: dts: qcom: qcs6490-rb3gen2: Add node " Krishna chaitanya chundru
2024-11-12 15:49 ` Bjorn Andersson
2024-11-15 11:45 ` Manivannan Sadhasivam
2024-11-20 8:06 ` Krzysztof Kozlowski
2024-11-20 11:03 ` Dmitry Baryshkov
2024-11-20 13:28 ` Krzysztof Kozlowski
2024-11-21 22:44 ` Dmitry Baryshkov
2024-11-12 15:01 ` [PATCH v3 3/6] PCI: Add new start_link() & stop_link function ops Krishna chaitanya chundru
2024-11-12 23:41 ` Bjorn Helgaas
2024-11-13 8:41 ` Krishna Chaitanya Chundru
2024-11-15 11:51 ` Manivannan Sadhasivam
2024-11-12 15:01 ` [PATCH v3 4/6] PCI: dwc: Add support for new pci function op Krishna chaitanya chundru
2024-11-12 23:32 ` Bjorn Helgaas
2024-11-12 15:01 ` [PATCH v3 5/6] PCI: qcom: Add support for host_stop_link() & host_start_link() Krishna chaitanya chundru
2024-11-12 23:36 ` Bjorn Helgaas [this message]
2024-11-15 11:57 ` Manivannan Sadhasivam
2024-11-24 1:44 ` Krishna Chaitanya Chundru
2024-11-12 15:01 ` [PATCH v3 6/6] PCI: pwrctl: Add power control driver for qps615 Krishna chaitanya chundru
2024-11-12 15:51 ` Bjorn Andersson
2024-11-12 23:21 ` Bjorn Andersson
2024-11-13 13:38 ` Bartosz Golaszewski
2024-11-15 12:25 ` Manivannan Sadhasivam
2024-11-20 14:59 ` Uwe Kleine-König
2024-12-04 21:19 ` Bjorn Helgaas
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