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dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BgknFs7F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F13D51F00A3A; Tue, 14 Jul 2026 20:03:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784059403; bh=cQtB/9gmuDtsjTSXmfGDwguH+t2INntnsFfQTcRQfmc=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=BgknFs7Fu+QSZ38a4z9tjhWjHTp1Ib+d8vNiiOkafIzjc+Iwx57GCe+Kf3z7HpDav 0ypQ0SmcATqSU4tWm5h6IfQdmpJ1LTpnyCQvMR187hRR1lcDciJZEM56Rg2Tuya5Dd QO2rnuVpF2oTOf6g1DVcZK0ysTe/PNzBS8iaY/Div/gv6jHDdJrsRDGlZOl7Bkhtdu m5KRNmn30trPMudwdPCPoMAI5PXi5D6fCUY35cXDOALxIVNmoWvmgliIf94RD8ki/0 gzVMBtzBtgq9gacw+SoCFqpTQJqCLCeR4qyu72fR/0P3hHzEEixPG6AA5L5uA1lcgJ wId5ykZKiuikA== From: sashiko-bot@kernel.org Subject: Re: [PATCH v13 17/35] phy: rockchip: usbdp: Drop DP HPD handling Reply-To: sashiko-reviews@lists.linux.dev To: "Sebastian Reichel" Cc: vkoul@kernel.org, neil.armstrong@linaro.org, robh@kernel.org, conor+dt@kernel.org, olteanv@gmail.com, devicetree@vger.kernel.org, linux-phy@lists.infradead.org In-Reply-To: <20260714-rockchip-usbdp-cleanup-v13-17-6cb3e769d4c5@collabora.com> References: <20260714-rockchip-usbdp-cleanup-v13-0-6cb3e769d4c5@collabora.com> <20260714-rockchip-usbdp-cleanup-v13-17-6cb3e769d4c5@collabora.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 14 Jul 2026 20:03:22 +0000 Message-Id: <20260714200322.F13D51F00A3A@smtp.kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Thank you for your contribution! Sashiko AI review found 1 potential issue(= s) to consider: Pre-existing issues: - [High] The Type-C mux handler ignores standard USB and Safe mode reset ev= ents, preventing dynamic recovery of USB 3.0 functionality when exiting DP = Alt Mode. -- --- Patch [17]: [PATCH v13 17/35] phy: rockchip: usbdp: Drop DP HPD handlin= g --- commit 7a23b9358d639150ae95d06261a789689b085a0c Author: Sebastian Reichel phy: rockchip: usbdp: Drop DP HPD handling This commit removes the HPD handling logic from the USBDP PHY, delegating the responsibility to the displayport controller itself. It also adjusts the Type-C mux set routine to ignore mux events not involving DP AltMode. > diff --git a/drivers/phy/rockchip/phy-rockchip-usbdp.c b/drivers/phy/rock= chip/phy-rockchip-usbdp.c > --- a/drivers/phy/rockchip/phy-rockchip-usbdp.c > +++ b/drivers/phy/rockchip/phy-rockchip-usbdp.c [ ... ] > @@ -1309,6 +1267,14 @@ static int rk_udphy_typec_mux_set(struct typec_mux= _dev *mux, > struct rk_udphy *udphy =3D typec_mux_get_drvdata(mux); > u8 mode; > =20 > + /* > + * Ignore mux events not involving DP AltMode, because > + * the mode field is being reused, e.g. state->mode =3D=3D 4 > + * could be either TYPEC_MODE_USB4 or TYPEC_DP_STATE_C. > + */ > + if (!state->alt || state->alt->svid !=3D USB_TYPEC_DP_SID) > + return 0; > + [Severity: High] This is a pre-existing issue, but does this early return cause the PHY to ignore standard TYPEC_STATE_SAFE and TYPEC_STATE_USB reset events? When a dynamic exit from DP Alt Mode occurs (for example, via VDM), TCPM typically sets the mux to TYPEC_STATE_SAFE and then TYPEC_STATE_USB. During these transitions, state->alt will be NULL. Because this early return completely ignores those states, udphy->mode appears to get stuck in UDPHY_MODE_DP, leaving the PHY lanes permanently mapped to DisplayPort. Could this cause subsequent USB power-on attempts to fail the !(udphy->mode & mode) check in rk_udphy_power_on() and silently abort, breaking USB 3.0 SuperSpeed functionality until a physical replug occurs? --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260714-rockchip-u= sbdp-cleanup-v13-0-6cb3e769d4c5@collabora.com?part=3D17