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Date: Sat, 24 Feb 2024 01:02:03 +0100
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Subject: Re: [PATCH v7 3/7] PCI: qcom: Add ICC bandwidth vote for CPU to PCIe
 path
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To: Krishna chaitanya chundru <quic_krichai@quicinc.com>,
 Bjorn Andersson <andersson@kernel.org>,
 Lorenzo Pieralisi <lpieralisi@kernel.org>,
 =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= <kw@linux.com>,
 Rob Herring <robh@kernel.org>, Bjorn Helgaas <bhelgaas@google.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>,
 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
 Rob Herring <robh+dt@kernel.org>, Johan Hovold <johan+linaro@kernel.org>,
 Brian Masney <bmasney@redhat.com>, Georgi Djakov <djakov@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 vireshk@kernel.org, quic_vbadigan@quicinc.com, quic_skananth@quicinc.com,
 quic_nitegupt@quicinc.com, quic_parass@quicinc.com,
 Bryan O'Donoghue <bryan.odonoghue@linaro.org>
References: <20240223-opp_support-v7-0-10b4363d7e71@quicinc.com>
 <20240223-opp_support-v7-3-10b4363d7e71@quicinc.com>
From: Konrad Dybcio <konrad.dybcio@linaro.org>
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In-Reply-To: <20240223-opp_support-v7-3-10b4363d7e71@quicinc.com>
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On 23.02.2024 15:48, Krishna chaitanya chundru wrote:
> To access PCIe registers, PCIe BAR space, config space the CPU-PCIe
> ICC(interconnect consumers) path should be voted otherwise it may
> lead to NoC(Network on chip) timeout. We are surviving because of
> other driver vote for this path.
> As there is less access on this path compared to PCIe to mem path
> add minimum vote i.e 1KBps bandwidth always.
> 
> In suspend remove the disable this path after register space access
> is done.
> 
> Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
> ---

[...]

>  
> +	/* Remove cpu path vote after all the register access is done */
> +	ret = icc_disable(pcie->icc_cpu);
> +	if (ret) {
> +		dev_err(dev, "failed to disable icc path of cpu-pcie: %d\n", ret);
> +		if (pcie->suspended) {
> +			qcom_pcie_host_init(&pcie->pci->pp);
> +			pcie->suspended = false;
> +		}
> +		qcom_pcie_icc_opp_update(pcie);

This doesn't compile (you rename it in patch 6, this is patch 3)

Konrad