linux-kernel - Re: [PATCH 1/4] phy: qcom-qmp: Increase the phy init timeout

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Date:   Thu, 19 Dec 2019 08:29:55 -0700
From:   Jeffrey Hugo <jeffrey.l.hugo@...il.com>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        MSM <linux-arm-msm@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>, Can Guo <cang@...eaurora.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] phy: qcom-qmp: Increase the phy init timeout

On Thu, Dec 19, 2019 at 8:04 AM Vinod Koul <vkoul@...nel.org> wrote:
>
> If we do full reset of the phy, it seems to take a couple of ms to come
> up on my system so increase the timeout to 10ms.
>
> This was found by full reset addition by commit 870b1279c7a0
> ("scsi: ufs-qcom: Add reset control support for host controller") and
> fixes the regression to platforms by this commit.
>
> Suggested-by: Can Guo <cang@...eaurora.org>
> Signed-off-by: Vinod Koul <vkoul@...nel.org>

Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Tested-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>

Tested on the Lenovo Miix 630 laptop (a msm8998 based system).  This
addresses the regression.

> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index 091e20303a14..c2e800a3825a 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> @@ -66,7 +66,7 @@
>  /* QPHY_V3_PCS_MISC_CLAMP_ENABLE register bits */
>  #define CLAMP_EN                               BIT(0) /* enables i/o clamp_n */
>
> -#define PHY_INIT_COMPLETE_TIMEOUT              1000
> +#define PHY_INIT_COMPLETE_TIMEOUT              100000
>  #define POWER_DOWN_DELAY_US_MIN                        10
>  #define POWER_DOWN_DELAY_US_MAX                        11
>
> --
> 2.23.0
>