linux-kernel - Re: [PATCH] soc: qcom: pmic_glink: disable UCSI on sc8280xp

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Date: Tue, 11 Jun 2024 11:52:59 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Johan Hovold <johan+linaro@...nel.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	regressions@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH] soc: qcom: pmic_glink: disable UCSI on sc8280xp

On Sat, Jun 08, 2024 at 01:45:29PM +0200, Johan Hovold wrote:
> Disconnecting an external display triggers a hypervisor reset on the
> Lenovo ThinkPad X13s since 6.10-rc1 which enabled UCSI. Disable it again
> until the regression has been fixed properly.
> 
> Fixes: 3f91a0bf4a0b ("soc: qcom: pmic_glink: reenable UCSI on sc8280xp")
> Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/soc/qcom/pmic_glink.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> 
> Dmitry reported off-list that his X13s was crashing when he disconnected
> an external display and I tracked it down to the enablement of UCSI in
> 6.10-rc1.
> 
> I have not had time to debug this further, but I'm flagging this as a
> regression and sending an effective so that we have a fall back in case
> this is not fixed in timely manner.
> 
> Note that this likely affects other Qualcomm SoCs as well.
> 
> Johan
> 
> 
> #regzbot introduced: 3f91a0bf4a0b
> 
> 
> 
> diff --git a/drivers/soc/qcom/pmic_glink.c b/drivers/soc/qcom/pmic_glink.c
> index 40fb09d69014..65279243072c 100644
> --- a/drivers/soc/qcom/pmic_glink.c
> +++ b/drivers/soc/qcom/pmic_glink.c
> @@ -348,11 +348,15 @@ static void pmic_glink_remove(struct platform_device *pdev)
>  	mutex_unlock(&__pmic_glink_lock);
>  }
>  
> +static const unsigned long pmic_glink_sc8280xp_client_mask = BIT(PMIC_GLINK_CLIENT_BATT) |
> +							     BIT(PMIC_GLINK_CLIENT_ALTMODE);
> +
>  static const unsigned long pmic_glink_sm8450_client_mask = BIT(PMIC_GLINK_CLIENT_BATT) |
>  							   BIT(PMIC_GLINK_CLIENT_ALTMODE) |
>  							   BIT(PMIC_GLINK_CLIENT_UCSI);
>  
>  static const struct of_device_id pmic_glink_of_match[] = {
> +	{ .compatible = "qcom,sc8280xp-pmic-glink", .data = &pmic_glink_sc8280xp_client_mask },
>  	{ .compatible = "qcom,pmic-glink", .data = &pmic_glink_sm8450_client_mask },
>  	{}
>  };
> -- 
> 2.44.1

-- 
heikki