[PATCH v2] PCI: qcom: Add async probe support

[PATCH v2] PCI: qcom: Add async probe support

[Manivannan Sadhasivam]

Qcom PCIe RC driver waits for the PHY link to be up during the probe. This
consumes several milliseconds during boot. So add async probe support so
that other drivers can load in parallel while this driver waits for the
link to be up.

Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---

Changes in v2:

* Rebased on top of v6.3-rc1

 drivers/pci/controller/dwc/pcie-qcom.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index a232b04af048..4ca357be88e0 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1862,6 +1862,7 @@ static struct platform_driver qcom_pcie_driver = {
 		.name = "qcom-pcie",
 		.suppress_bind_attrs = true,
 		.of_match_table = qcom_pcie_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 };
 builtin_platform_driver(qcom_pcie_driver);
-- 
2.25.1

Re: [PATCH v2] PCI: qcom: Add async probe support

[Johan Hovold]

On Mon, Mar 20, 2023 at 12:16:44PM +0530, Manivannan Sadhasivam wrote:
> Qcom PCIe RC driver waits for the PHY link to be up during the probe. This
> consumes several milliseconds during boot. So add async probe support so
> that other drivers can load in parallel while this driver waits for the
> link to be up.

You're not really "adding support" for async probe as much as you are
enabling it by default. Perhaps you can clarify that in the commit
summary and commit message (e.g. by rephrasing as "prefer async probe").

> Suggested-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> 
> Changes in v2:
> 
> * Rebased on top of v6.3-rc1

With an updated commit message:

Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Johan Hovold <johan+linaro@kernel.org>

>  drivers/pci/controller/dwc/pcie-qcom.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index a232b04af048..4ca357be88e0 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1862,6 +1862,7 @@ static struct platform_driver qcom_pcie_driver = {
>  		.name = "qcom-pcie",
>  		.suppress_bind_attrs = true,
>  		.of_match_table = qcom_pcie_match,
> +		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
>  	},
>  };
>  builtin_platform_driver(qcom_pcie_driver);

Johan

Re: [PATCH v2] PCI: qcom: Add async probe support

[Lorenzo Pieralisi]

On Mon, 20 Mar 2023 12:16:44 +0530, Manivannan Sadhasivam wrote:
> Qcom PCIe RC driver waits for the PHY link to be up during the probe. This
> consumes several milliseconds during boot. So add async probe support so
> that other drivers can load in parallel while this driver waits for the
> link to be up.
> 
> 

Applied to controller/qcom, thanks!

[1/1] PCI: qcom: Add async probe support
      https://git.kernel.org/pci/pci/c/2dee743c8b4d

Thanks,
Lorenzo