From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Vinod Koul <vkoul@kernel.org>
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
linux-arm-msm@vger.kernel.org, Andy Gross <agross@kernel.org>,
Can Guo <cang@codeaurora.org>,
Jeffrey Hugo <jeffrey.l.hugo@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/4] phy: qcom-qmp: Increase the phy init timeout
Date: Thu, 19 Dec 2019 18:08:35 -0800 [thread overview]
Message-ID: <20191220020835.GK448416@yoga> (raw)
In-Reply-To: <20191219150433.2785427-2-vkoul@kernel.org>
On Thu 19 Dec 07:04 PST 2019, Vinod Koul 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@codeaurora.org>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
This does look familiar...
https://lore.kernel.org/linux-arm-msm/20191107000917.1092409-3-bjorn.andersson@linaro.org/
> ---
> 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
100ms seems a little bit excessive, and we do end up waiting this long
when we have PCIe links without an attached device...
Do you need >10ms or could we just have my patch merged?
Regards,
Bjorn
> #define POWER_DOWN_DELAY_US_MIN 10
> #define POWER_DOWN_DELAY_US_MAX 11
>
> --
> 2.23.0
>
next prev parent reply other threads:[~2019-12-20 2:08 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-19 15:04 [PATCH 0/4] phy: qcom-qmp: Fixes and updates for sm8150 Vinod Koul
2019-12-19 15:04 ` [PATCH 1/4] phy: qcom-qmp: Increase the phy init timeout Vinod Koul
2019-12-19 15:29 ` Jeffrey Hugo
2019-12-19 15:40 ` Vinod Koul
2019-12-20 2:08 ` Bjorn Andersson [this message]
2019-12-20 4:21 ` Vinod Koul
2019-12-19 15:04 ` [PATCH 2/4] phy: qcom-qmp: Use register defines Vinod Koul
2019-12-19 15:30 ` Jeffrey Hugo
2019-12-20 0:44 ` cang
2019-12-20 4:22 ` Vinod Koul
2019-12-19 15:04 ` [PATCH 3/4] phy: qcom-qmp: Add optional SW reset Vinod Koul
2019-12-19 15:31 ` Jeffrey Hugo
2019-12-20 0:22 ` cang
2019-12-20 0:49 ` cang
2019-12-20 4:24 ` Vinod Koul
2019-12-20 6:00 ` Can Guo
2019-12-20 7:10 ` Vinod Koul
2019-12-20 7:41 ` Can Guo
2019-12-20 7:53 ` Vinod Koul
2019-12-23 9:00 ` Manu Gautam
2019-12-23 9:02 ` Manu Gautam
2019-12-19 15:04 ` [PATCH 4/4] phy: qcom-qmp: remove duplicate powerdown write Vinod Koul
2019-12-19 15:31 ` Jeffrey Hugo
2019-12-20 1:30 ` Can Guo
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