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Message-ID: <77a486ae-06bb-7f1b-17ab-8d60ccfbdee6@gmail.com>
Date: Mon, 13 Jun 2022 22:40:55 +0200
From: Ferry Toth <fntoth@...il.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Vinod Koul <vkoul@...nel.org>,
Hans de Goede <hdegoede@...hat.com>,
Stephan Gerhold <stephan@...hold.net>,
linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH v1 1/1] phy: ti: tusb1210: Don't check for write errors
when powering on
Hi
Op 13-06-2022 om 18:08 schreef Andy Shevchenko:
> On some platforms, like Intel Merrifield, the writing values during power on
> may timeout:
>
> tusb1210 dwc3.0.auto.ulpi: error -110 writing val 0x41 to reg 0x80
with the patch this error continues to appear in the logs
> phy phy-dwc3.0.auto.ulpi.0: phy poweron failed --> -110
> dwc3 dwc3.0.auto: error -ETIMEDOUT: failed to initialize core
> dwc3: probe of dwc3.0.auto failed with error -110
these errors are gone
> which effectively fails the probe of the USB controller.
and probe of dwc3 succeeds
Tested on Intel Edison (Merrifield)
> Drop the check as it was before the culprit commit (see Fixes tag).
>
> Fixes: 09a3512681b3 ("phy: ti: tusb1210: Improve ulpi_read()/_write() error checking")
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
> drivers/phy/ti/phy-tusb1210.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/phy/ti/phy-tusb1210.c b/drivers/phy/ti/phy-tusb1210.c
> index c3ab4b69ea68..669c13d6e402 100644
> --- a/drivers/phy/ti/phy-tusb1210.c
> +++ b/drivers/phy/ti/phy-tusb1210.c
> @@ -105,8 +105,9 @@ static int tusb1210_power_on(struct phy *phy)
> msleep(TUSB1210_RESET_TIME_MS);
>
> /* Restore the optional eye diagram optimization value */
> - return tusb1210_ulpi_write(tusb, TUSB1210_VENDOR_SPECIFIC2,
> - tusb->vendor_specific2);
> + tusb1210_ulpi_write(tusb, TUSB1210_VENDOR_SPECIFIC2, tusb->vendor_specific2);
> +
> + return 0;
> }
>
> static int tusb1210_power_off(struct phy *phy)
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