From: Konrad Dybcio <konrad.dybcio@linaro.org>
To: "Manivannan Sadhasivam" <mani@kernel.org>,
"Bjorn Andersson" <andersson@kernel.org>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Rob Herring" <robh@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Philipp Zabel" <p.zabel@pengutronix.de>,
"Stanimir Varbanov" <svarbanov@mm-sol.com>,
"Andrew Murray" <amurray@thegoodpenguin.co.uk>,
"Vinod Koul" <vkoul@kernel.org>
Cc: Marijn Suijten <marijn.suijten@somainline.org>,
linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org,
Konrad Dybcio <konrad.dybcio@linaro.org>
Subject: [PATCH 2/4] PCI: qcom: Cache last icc bandwidth
Date: Wed, 27 Dec 2023 23:17:20 +0100 [thread overview]
Message-ID: <20231227-topic-8280_pcie-v1-2-095491baf9e4@linaro.org> (raw)
In-Reply-To: <20231227-topic-8280_pcie-v1-0-095491baf9e4@linaro.org>
In preparation for shutting down the RC, cache the last interconnect
bandwidth vote to allow for icc tag setting.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/pci/controller/dwc/pcie-qcom.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 1c5ab8c4ff39..a02dc197c495 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -240,6 +240,7 @@ struct qcom_pcie {
struct phy *phy;
struct gpio_desc *reset;
struct icc_path *icc_mem;
+ u32 last_bw;
const struct qcom_pcie_cfg *cfg;
struct dentry *debugfs;
bool suspended;
@@ -1387,6 +1388,8 @@ static int qcom_pcie_icc_init(struct qcom_pcie *pcie)
return ret;
}
+ pcie->last_bw = QCOM_PCIE_LINK_SPEED_TO_BW(1);
+
return 0;
}
@@ -1415,6 +1418,8 @@ static void qcom_pcie_icc_update(struct qcom_pcie *pcie)
dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n",
ret);
}
+
+ pcie->last_bw = width * QCOM_PCIE_LINK_SPEED_TO_BW(speed);
}
static int qcom_pcie_link_transition_count(struct seq_file *s, void *data)
@@ -1578,6 +1583,8 @@ static int qcom_pcie_suspend_noirq(struct device *dev)
return ret;
}
+ pcie->last_bw = kBps_to_icc(1);
+
/*
* Turn OFF the resources only for controllers without active PCIe
* devices. For controllers with active devices, the resources are kept
--
2.43.0
next prev parent reply other threads:[~2023-12-27 22:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-27 22:17 [PATCH 0/4] Qualcomm PCIe RC shutdown & reinit Konrad Dybcio
2023-12-27 22:17 ` [PATCH 1/4] PCI: qcom: Reshuffle reset logic in 2_7_0 .init Konrad Dybcio
2023-12-29 14:04 ` Johan Hovold
2023-12-29 15:01 ` Konrad Dybcio
2023-12-29 15:29 ` Johan Hovold
2023-12-30 1:16 ` Konrad Dybcio
2024-01-01 17:31 ` Manivannan Sadhasivam
2024-01-02 10:17 ` Johan Hovold
2024-01-02 17:03 ` Konrad Dybcio
2024-01-03 10:40 ` Johan Hovold
2024-01-03 12:11 ` Konrad Dybcio
2023-12-29 15:46 ` Bjorn Helgaas
2023-12-30 22:11 ` Konrad Dybcio
2023-12-27 22:17 ` Konrad Dybcio [this message]
2023-12-27 22:17 ` [PATCH 3/4] PCI: qcom: Read back PARF_LTSSM register Konrad Dybcio
2024-01-02 17:05 ` Manivannan Sadhasivam
2023-12-27 22:17 ` [PATCH 4/4] PCI: qcom: Implement RC shutdown/power up Konrad Dybcio
2023-12-28 15:12 ` kernel test robot
2023-12-29 3:42 ` kernel test robot
2024-01-02 17:07 ` Manivannan Sadhasivam
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