linux-kernel - Re: [PATCH] phy: rockchip-inno-usb2: Sync initial otg state

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Message-ID: <f252c182-e306-174e-dd32-51c9a406d3f7@sholland.org>
Date:   Wed, 22 Jun 2022 00:16:16 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Peter Geis <pgwipeout@...il.com>, Heiko Stuebner <heiko@...ech.de>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>
Cc:     linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: rockchip-inno-usb2: Sync initial otg state

On 6/21/22 7:31 PM, Peter Geis wrote:
> The initial otg state for the phy defaults to device mode. The actual
> state isn't detected until an ID IRQ fires. Fix this by syncing the ID
> state during initialization.
> 
> Fixes: 51a9b2c03dd3 ("phy: rockchip-inno-usb2: Handle ID IRQ")
> Signed-off-by: Peter Geis <pgwipeout@...il.com>

One comment below. Either way it fixes a bug, so:

Reviewed-by: Samuel Holland <samuel@...lland.org>

> ---
>  drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
> index 6711659f727c..6e44069617df 100644
> --- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
> +++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
> @@ -1162,6 +1162,12 @@ static int rockchip_usb2phy_otg_port_init(struct rockchip_usb2phy *rphy,
>  					EXTCON_USB_HOST, &rport->event_nb);
>  		if (ret)
>  			dev_err(rphy->dev, "register USB HOST notifier failed\n");
> +
> +		if (!of_property_read_bool(rphy->dev->of_node, "extcon")) {

Currently the IRQ handler does not care who created the extcon. We should at
least be consistent between here and there.

Regards,
Samuel

> +			/* do initial sync of usb state */
> +			ret = property_enabled(rphy->grf, &rport->port_cfg->utmi_id);
> +			extcon_set_state_sync(rphy->edev, EXTCON_USB_HOST, !ret);
> +		}
>  	}
>  
>  out:
>