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h=from:subject; bh=BxNRELJCv8xh2C7UZi+0KHsQjfF46eSQoB3JSyofgFg=; b=owGbwMvMwCFW0bfok0KS4TbG02pJDBnBbnFM53c/E2r2OLxw2b7ZqVv4lgdOsj7IFe+bKpuQ2 PD31mKVjlIWBjEOBlkxRRZd/zyDG1dSt8zhrDGGmcPKBDKEgYtTACaidYrhf+n3hCNh3zxWVUz5 6GRw5alIhx/H7SPhFRklKnsk5A+xfmRk2Pfx3LMWZ0EBhWALScVFYWf1e3f7lgTOyj5VVZHzOWI rKwA= X-Mailer: git-send-email 2.50.0.rc2.701.gf1e915cc24-goog Message-ID: <20250618230606.3272497-2-rdbabiera@google.com> Subject: [PATCH v3] usb: typec: tcpm: apply vbus before data bringup in tcpm_src_attach From: RD Babiera Cc: heikki.krogerus@linux.intel.com, badhri@google.com, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, RD Babiera , stable@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This patch fixes Type-C compliance test TD 4.7.6 - Try.SNK DRP Connect SNKAS. tVbusON has a limit of 275ms when entering SRC_ATTACHED. Compliance testers can interpret the TryWait.Src to Attached.Src transition after Try.Snk as being in Attached.Src the entire time, so ~170ms is lost to the debounce timer. Setting the data role can be a costly operation in host mode, and when completed after 100ms can cause Type-C compliance test check TD 4.7.5.V.4 to fail. Turn VBUS on before tcpm_set_roles to meet timing requirement. Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)") Cc: stable@vger.kernel.org Signed-off-by: RD Babiera Reviewed-by: Badhri Jagan Sridharan Reviewed-by: Heikki Krogerus --- Changes since v1: * Rebased on top of usb-linus for v6.15 Changes since v2: * Restored to v1, usb-next and usb-linus are both synced to v6.16 so there is no longer a version mismatch possibility. --- drivers/usb/typec/tcpm/tcpm.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 1a1f9e1f8e4e..1f6fdfaa34bf 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -4410,17 +4410,6 @@ static int tcpm_src_attach(struct tcpm_port *port) =20 tcpm_enable_auto_vbus_discharge(port, true); =20 - ret =3D tcpm_set_roles(port, true, TYPEC_STATE_USB, - TYPEC_SOURCE, tcpm_data_role_for_source(port)); - if (ret < 0) - return ret; - - if (port->pd_supported) { - ret =3D port->tcpc->set_pd_rx(port->tcpc, true); - if (ret < 0) - goto out_disable_mux; - } - /* * USB Type-C specification, version 1.2, * chapter 4.5.2.2.8.1 (Attached.SRC Requirements) @@ -4430,13 +4419,24 @@ static int tcpm_src_attach(struct tcpm_port *port) (polarity =3D=3D TYPEC_POLARITY_CC2 && port->cc1 =3D=3D TYPEC_CC_RA))= { ret =3D tcpm_set_vconn(port, true); if (ret < 0) - goto out_disable_pd; + return ret; } =20 ret =3D tcpm_set_vbus(port, true); if (ret < 0) goto out_disable_vconn; =20 + ret =3D tcpm_set_roles(port, true, TYPEC_STATE_USB, TYPEC_SOURCE, + tcpm_data_role_for_source(port)); + if (ret < 0) + goto out_disable_vbus; + + if (port->pd_supported) { + ret =3D port->tcpc->set_pd_rx(port->tcpc, true); + if (ret < 0) + goto out_disable_mux; + } + port->pd_capable =3D false; =20 port->partner =3D NULL; @@ -4447,14 +4447,14 @@ static int tcpm_src_attach(struct tcpm_port *port) =20 return 0; =20 -out_disable_vconn: - tcpm_set_vconn(port, false); -out_disable_pd: - if (port->pd_supported) - port->tcpc->set_pd_rx(port->tcpc, false); out_disable_mux: tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, TYPEC_ORIENTATION_NONE); +out_disable_vbus: + tcpm_set_vbus(port, false); +out_disable_vconn: + tcpm_set_vconn(port, false); + return ret; } =20 base-commit: e04c78d86a9699d136910cfc0bdcf01087e3267e --=20 2.50.0.rc2.701.gf1e915cc24-goog