linux-kernel - Re: [PATCH V2 8/9] phy: tegra: p2u: Set ENABLE_L2_EXIT_RATE

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Message-ID: <20220926181800.GA1612559@bhelgaas>
Date:   Mon, 26 Sep 2022 13:18:00 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     lpieralisi@...nel.org, robh@...nel.org, kw@...ux.com,
        bhelgaas@...gle.com, thierry.reding@...il.com,
        jonathanh@...dia.com, kishon@...com, vkoul@...nel.org,
        mani@...nel.org, Sergey.Semin@...kalelectronics.ru,
        ffclaire1224@...il.com, linux-pci@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, kthota@...dia.com,
        mmaddireddy@...dia.com, sagar.tv@...il.com
Subject: Re: [PATCH V2 8/9] phy: tegra: p2u: Set ENABLE_L2_EXIT_RATE_CHANGE
 in calibration

On Mon, Sep 26, 2022 at 05:20:37PM +0530, Vidya Sagar wrote:
> Set ENABLE_L2_EXIT_RATE_CHANGE to request UPHY PLL rate change to Gen1
> during initialization. This helps in the below surprise down cases,
>   - Surprise down happens at Gen3/Gen4 link speed
>   - Surprise down happens and external REFCLK is cut off which causes
> UPHY PLL rate to deviate to an invalid rate
> 
> ENABLE_L2_EXIT_RATE_CHANGE needs to be set to bring the UPHY PLL rate
> back to Gen1 during controller initialization for the link up.
> 
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
> Reported-by: kernel test robot <lkp@...el.com>

I doubt the kernel test robot reported the issue being fixed by this
patch.  More likely it reported a syntax or similar issue in v1, and I
think the "reported-by" tag is meaningless in cases like that.