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

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Date:   Thu, 19 Dec 2019 21:10:09 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Jeffrey Hugo <jeffrey.l.hugo@...il.com>
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 19-12-19, 08:29, Jeffrey Hugo wrote:
> 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.

Thanks Jeff for quick test and reviews! Appreciate it.

> > ---
> >  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
> >

-- 
~Vinod