linux-kernel - Re: [PATCH v4 4/9] PCI: qcom-ep: Update the D-state log

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Date:   Fri, 28 Jul 2023 09:45:37 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Krishna chaitanya chundru <quic_krichai@...cinc.com>
Cc:     manivannan.sadhasivam@...aro.org, helgaas@...nel.org,
        linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_vbadigan@...cinc.com,
        quic_nitegupt@...cinc.com, quic_skananth@...cinc.com,
        quic_ramkri@...cinc.com, krzysztof.kozlowski@...aro.org,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v4 4/9] PCI: qcom-ep: Update the D-state log

On Thu, Jul 13, 2023 at 12:40:13PM +0530, Krishna chaitanya chundru wrote:
> Updated the D-state log which prints in D-state in string format.
> 

How about:

"Now that the state event is stored as pci_power_t, let's use the PCI helper
pci_power_name() to print the state event."

Also, this patch should be sent ahead of previous patch.

> Signed-off-by: Krishna chaitanya chundru <quic_krichai@...cinc.com>
> ---
>  drivers/pci/controller/dwc/pcie-qcom-ep.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
> index 66fd421..75ab6d6 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
> @@ -583,7 +583,6 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data)
>  	} else if (FIELD_GET(PARF_INT_ALL_DSTATE_CHANGE, status)) {
>  		dstate = dw_pcie_readl_dbi(pci, DBI_CON_STATUS) &
>  					   DBI_CON_STATUS_POWER_STATE_MASK;
> -		dev_dbg(dev, "Received D%d state event\n", dstate);
>  		state = dstate;
>  		if (dstate == 3) {
>  			val = readl_relaxed(pcie_ep->parf + PARF_PM_CTRL);
> @@ -593,6 +592,7 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data)
>  			if (gpiod_get_value(pcie_ep->reset))
>  				state = PCI_D3cold;
>  		}
> +		dev_dbg(dev, "Received D-state:%s event\n", pci_power_name(state));

dev_dbg(dev, "Received %s event\n", pci_power_name(state));

- Mani

>  		pci_epc_dstate_notify(pci->ep.epc, state);
>  	} else if (FIELD_GET(PARF_INT_ALL_LINK_UP, status)) {
>  		dev_dbg(dev, "Received Linkup event. Enumeration complete!\n");
> -- 
> 2.7.4
> 

-- 
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