[v2] interconnect: qcom: icc-rpmh: probe defer incase of missing QoS clock dependency

[PATCH V2] interconnect: qcom: icc-rpmh: probe defer incase of missing QoS clock dependency

Posted by Raviteja Laggyshetty 2 months, 2 weeks ago

Return -EPROBE_DEFER from interconnect provider incase probe defer is
received from devm_clk_bulk_get_all(). This would help in reattempting
the inteconnect driver probe, once the required QoS clocks are
available.

Suggested-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Raviteja Laggyshetty <quic_rlaggysh@quicinc.com>
---
Changes in v2:
 - Removed the qos_clk_required rename change and posted it as separate
   patch.
 - As suggested, dev_err_probe is used for reporting the probe defer
   error message.
---
 drivers/interconnect/qcom/icc-rpmh.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c
index f49a8e0cb03c..adacd6f7d6a8 100644
--- a/drivers/interconnect/qcom/icc-rpmh.c
+++ b/drivers/interconnect/qcom/icc-rpmh.c
@@ -311,6 +311,9 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev)
 		}
 
 		qp->num_clks = devm_clk_bulk_get_all(qp->dev, &qp->clks);
+		if (qp->num_clks == -EPROBE_DEFER)
+			return dev_err_probe(dev, qp->num_clks, "Failed to get QoS clocks\n");
+
 		if (qp->num_clks < 0 || (!qp->num_clks && desc->qos_clks_required)) {
 			dev_info(dev, "Skipping QoS, failed to get clk: %d\n", qp->num_clks);
 			goto skip_qos_config;
-- 
2.39.2

Re: [PATCH V2] interconnect: qcom: icc-rpmh: probe defer incase of missing QoS clock dependency

Posted by Konrad Dybcio 2 months, 1 week ago

On 11.09.2024 11:45 AM, Raviteja Laggyshetty wrote:
> Return -EPROBE_DEFER from interconnect provider incase probe defer is
> received from devm_clk_bulk_get_all(). This would help in reattempting
> the inteconnect driver probe, once the required QoS clocks are
> available.
> 
> Suggested-by: Bjorn Andersson <andersson@kernel.org>
> Signed-off-by: Raviteja Laggyshetty <quic_rlaggysh@quicinc.com>
> ---

Reviewed-by: Konrad Dybcio <konradybcio@kernel.org>

Konrad

Re: [PATCH V2] interconnect: qcom: icc-rpmh: probe defer incase of missing QoS clock dependency

Posted by Andrew Halaney 2 months, 2 weeks ago

On Wed, Sep 11, 2024 at 09:45:16AM GMT, Raviteja Laggyshetty wrote:
> Return -EPROBE_DEFER from interconnect provider incase probe defer is
> received from devm_clk_bulk_get_all(). This would help in reattempting
> the inteconnect driver probe, once the required QoS clocks are
> available.
> 

Might be a bit overzealous, but to me this feels like a fix so something
like:

    Fixes: 0a7be6b35da8 ("interconnect: qcom: icc-rpmh: Add QoS configuration support")

might be appropriate? What are your thoughts?


> Suggested-by: Bjorn Andersson <andersson@kernel.org>
> Signed-off-by: Raviteja Laggyshetty <quic_rlaggysh@quicinc.com>
> ---
> Changes in v2:
>  - Removed the qos_clk_required rename change and posted it as separate
>    patch.
>  - As suggested, dev_err_probe is used for reporting the probe defer
>    error message.
> ---
>  drivers/interconnect/qcom/icc-rpmh.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c
> index f49a8e0cb03c..adacd6f7d6a8 100644
> --- a/drivers/interconnect/qcom/icc-rpmh.c
> +++ b/drivers/interconnect/qcom/icc-rpmh.c
> @@ -311,6 +311,9 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev)
>  		}
>  
>  		qp->num_clks = devm_clk_bulk_get_all(qp->dev, &qp->clks);
> +		if (qp->num_clks == -EPROBE_DEFER)
> +			return dev_err_probe(dev, qp->num_clks, "Failed to get QoS clocks\n");
> +
>  		if (qp->num_clks < 0 || (!qp->num_clks && desc->qos_clks_required)) {
>  			dev_info(dev, "Skipping QoS, failed to get clk: %d\n", qp->num_clks);
>  			goto skip_qos_config;
> -- 
> 2.39.2
> 
>