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Signed-off-by: Amit Sunil Dhamne Reviewed-by: Rob Herring (Arm) --- .../bindings/connector/usb-connector.yaml | 35 ++++++++++++++++++= +++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml= b/Documentation/devicetree/bindings/connector/usb-connector.yaml index fb216ce68bb3..21a0c58c65cd 100644 --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml @@ -253,6 +253,36 @@ properties: =20 additionalProperties: false =20 + sink-wait-cap-time-ms: + description: Represents the max time in ms that USB Type-C port (in si= nk + role) should wait for the port partner (source role) to send source = caps. + SinkWaitCap timer starts when port in sink role attaches to the sour= ce. + This timer will stop when sink receives PD source cap advertisement = before + timeout in which case it'll move to capability negotiation stage. A + timeout leads to a hard reset message by the port. + minimum: 310 + maximum: 620 + default: 310 + + ps-source-off-time-ms: + description: Represents the max time in ms that a DRP in source role s= hould + take to turn off power after the PsSourceOff timer starts. PsSourceO= ff + timer starts when a sink's PHY layer receives EOP of the GoodCRC mes= sage + (corresponding to an Accept message sent in response to a PR_Swap or= a + FR_Swap request). This timer stops when last bit of GoodCRC EOP + corresponding to the received PS_RDY message is transmitted by the P= HY + layer. A timeout shall lead to error recovery in the type-c port. + minimum: 750 + maximum: 920 + default: 920 + + cc-debounce-time-ms: + description: Represents the max time in ms that a port shall wait to + determine if it's attached to a partner. + minimum: 100 + maximum: 200 + default: 200 + dependencies: sink-vdos-v1: [ sink-vdos ] sink-vdos: [ sink-vdos-v1 ] @@ -380,7 +410,7 @@ examples: }; =20 # USB-C connector attached to a typec port controller(ptn5110), which has - # power delivery support and enables drp. + # power delivery support, explicitly defines time properties and enables= drp. - | #include typec: ptn5110 { @@ -393,6 +423,9 @@ examples: sink-pdos =3D ; op-sink-microwatt =3D <10000000>; + sink-wait-cap-time-ms =3D <465>; + ps-source-off-time-ms =3D <835>; + cc-debounce-time-ms =3D <101>; }; }; =20 --=20 2.47.0.105.g07ac214952-goog From nobody Tue Nov 26 00:29:33 2024 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CAF6D13B5B3 for ; 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Tue, 22 Oct 2024 20:55:53 -0700 (PDT) Date: Tue, 22 Oct 2024 20:55:49 -0700 In-Reply-To: <20241022-pd-dt-time-props-v1-0-fea96f51b302@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241022-pd-dt-time-props-v1-0-fea96f51b302@google.com> X-Mailer: b4 0.13.0 Message-ID: <20241022-pd-dt-time-props-v1-2-fea96f51b302@google.com> Subject: [PATCH 2/2] usb: typec: tcpm: Add support for parsing time dt properties From: Amit Sunil Dhamne To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heikki Krogerus , Greg Kroah-Hartman Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Badhri Jagan Sridharan , RD Babiera , Kyle Tso , Amit Sunil Dhamne Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Add support for DT time properties to allow users to define platform specific timing deadlines of certain timers rather than using hardcoded ones. For values that have not been explicitly defined in DT using this property, default values will be set therefore, making this change backward compatible. Signed-off-by: Amit Sunil Dhamne Reviewed-by: Heikki Krogerus --- drivers/usb/typec/tcpm/tcpm.c | 73 +++++++++++++++++++++++++++++++++------= ---- 1 file changed, 57 insertions(+), 16 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index fc619478200f..b3d5d1d48937 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -310,6 +310,17 @@ struct pd_data { unsigned int operating_snk_mw; }; =20 +/* + * @sink_wait_cap_time: Deadline (in ms) for tTypeCSinkWaitCap timer + * @ps_src_wait_off_time: Deadline (in ms) for tPSSourceOff timer + * @cc_debounce_time: Deadline (in ms) for tCCDebounce timer + */ +struct pd_timings { + u32 sink_wait_cap_time; + u32 ps_src_off_time; + u32 cc_debounce_time; +}; + struct tcpm_port { struct device *dev; =20 @@ -552,6 +563,9 @@ struct tcpm_port { */ unsigned int message_id_prime; unsigned int rx_msgid_prime; + + /* Timer deadline values configured at runtime */ + struct pd_timings timings; #ifdef CONFIG_DEBUG_FS struct dentry *dentry; struct mutex logbuffer_lock; /* log buffer access lock */ @@ -4639,15 +4653,15 @@ static void run_state_machine(struct tcpm_port *por= t) case SRC_ATTACH_WAIT: if (tcpm_port_is_debug(port)) tcpm_set_state(port, DEBUG_ACC_ATTACHED, - PD_T_CC_DEBOUNCE); + port->timings.cc_debounce_time); else if (tcpm_port_is_audio(port)) tcpm_set_state(port, AUDIO_ACC_ATTACHED, - PD_T_CC_DEBOUNCE); + port->timings.cc_debounce_time); else if (tcpm_port_is_source(port) && port->vbus_vsafe0v) tcpm_set_state(port, tcpm_try_snk(port) ? SNK_TRY : SRC_ATTACHED, - PD_T_CC_DEBOUNCE); + port->timings.cc_debounce_time); break; =20 case SNK_TRY: @@ -4698,7 +4712,7 @@ static void run_state_machine(struct tcpm_port *port) } break; case SRC_TRYWAIT_DEBOUNCE: - tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE); + tcpm_set_state(port, SRC_ATTACHED, port->timings.cc_debounce_time); break; case SRC_TRYWAIT_UNATTACHED: tcpm_set_state(port, SNK_UNATTACHED, 0); @@ -4901,7 +4915,7 @@ static void run_state_machine(struct tcpm_port *port) (port->cc1 !=3D TYPEC_CC_OPEN && port->cc2 =3D=3D TYPEC_CC_OPEN)) tcpm_set_state(port, SNK_DEBOUNCED, - PD_T_CC_DEBOUNCE); + port->timings.cc_debounce_time); else if (tcpm_port_is_disconnected(port)) tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); @@ -4941,7 +4955,7 @@ static void run_state_machine(struct tcpm_port *port) break; case SNK_TRYWAIT: tcpm_set_cc(port, TYPEC_CC_RD); - tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE); + tcpm_set_state(port, SNK_TRYWAIT_VBUS, port->timings.cc_debounce_time); break; case SNK_TRYWAIT_VBUS: /* @@ -5014,7 +5028,7 @@ static void run_state_machine(struct tcpm_port *port) break; case SNK_DISCOVERY_DEBOUNCE: tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE, - PD_T_CC_DEBOUNCE); + port->timings.cc_debounce_time); break; case SNK_DISCOVERY_DEBOUNCE_DONE: if (!tcpm_port_is_disconnected(port) && @@ -5041,10 +5055,10 @@ static void run_state_machine(struct tcpm_port *por= t) if (port->vbus_never_low) { port->vbus_never_low =3D false; tcpm_set_state(port, SNK_SOFT_RESET, - PD_T_SINK_WAIT_CAP); + port->timings.sink_wait_cap_time); } else { tcpm_set_state(port, SNK_WAIT_CAPABILITIES_TIMEOUT, - PD_T_SINK_WAIT_CAP); + port->timings.sink_wait_cap_time); } break; case SNK_WAIT_CAPABILITIES_TIMEOUT: @@ -5066,7 +5080,8 @@ static void run_state_machine(struct tcpm_port *port) if (tcpm_pd_send_control(port, PD_CTRL_GET_SOURCE_CAP, TCPC_TX_SOP)) tcpm_set_state_cond(port, hard_reset_state(port), 0); else - tcpm_set_state(port, hard_reset_state(port), PD_T_SINK_WAIT_CAP); + tcpm_set_state(port, hard_reset_state(port), + port->timings.sink_wait_cap_time); break; case SNK_NEGOTIATE_CAPABILITIES: port->pd_capable =3D true; @@ -5203,7 +5218,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, ACC_UNATTACHED, 0); break; case AUDIO_ACC_DEBOUNCE: - tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE); + tcpm_set_state(port, ACC_UNATTACHED, port->timings.cc_debounce_time); break; =20 /* Hard_Reset states */ @@ -5420,7 +5435,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, ERROR_RECOVERY, 0); break; case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF: - tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_OFF); + tcpm_set_state(port, ERROR_RECOVERY, port->timings.ps_src_off_time); break; case FR_SWAP_SNK_SRC_NEW_SINK_READY: if (port->vbus_source) @@ -5475,7 +5490,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_cc(port, TYPEC_CC_RD); /* allow CC debounce */ tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED, - PD_T_CC_DEBOUNCE); + port->timings.cc_debounce_time); break; case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: /* @@ -5510,7 +5525,7 @@ static void run_state_machine(struct tcpm_port *port) port->pps_data.active, 0); tcpm_set_charge(port, false); tcpm_set_state(port, hard_reset_state(port), - PD_T_PS_SOURCE_OFF); + port->timings.ps_src_off_time); break; case PR_SWAP_SNK_SRC_SOURCE_ON: tcpm_enable_auto_vbus_discharge(port, true); @@ -5666,7 +5681,7 @@ static void run_state_machine(struct tcpm_port *port) case PORT_RESET_WAIT_OFF: tcpm_set_state(port, tcpm_default_state(port), - port->vbus_present ? PD_T_PS_SOURCE_OFF : 0); + port->vbus_present ? port->timings.ps_src_off_time : 0); break; =20 /* AMS intermediate state */ @@ -6157,7 +6172,7 @@ static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *p= ort) case SRC_ATTACH_WAIT: if (tcpm_port_is_source(port)) tcpm_set_state(port, tcpm_try_snk(port) ? SNK_TRY : SRC_ATTACHED, - PD_T_CC_DEBOUNCE); + port->timings.cc_debounce_time); break; case SRC_STARTUP: case SRC_SEND_CAPABILITIES: @@ -7053,6 +7068,30 @@ static int tcpm_port_register_pd(struct tcpm_port *p= ort) return ret; } =20 +static void tcpm_fw_get_timings(struct tcpm_port *port, struct fwnode_hand= le *fwnode) +{ + int ret; + u32 val; + + ret =3D fwnode_property_read_u32(fwnode, "sink-wait-cap-time-ms", &val); + if (!ret) + port->timings.sink_wait_cap_time =3D val; + else + port->timings.sink_wait_cap_time =3D PD_T_SINK_WAIT_CAP; + + ret =3D fwnode_property_read_u32(fwnode, "ps-source-off-time-ms", &val); + if (!ret) + port->timings.ps_src_off_time =3D val; + else + port->timings.ps_src_off_time =3D PD_T_PS_SOURCE_OFF; + + ret =3D fwnode_property_read_u32(fwnode, "cc-debounce-time-ms", &val); + if (!ret) + port->timings.cc_debounce_time =3D val; + else + port->timings.cc_debounce_time =3D PD_T_CC_DEBOUNCE; +} + static int tcpm_fw_get_caps(struct tcpm_port *port, struct fwnode_handle *= fwnode) { struct fwnode_handle *capabilities, *child, *caps =3D NULL; @@ -7610,6 +7649,8 @@ struct tcpm_port *tcpm_register_port(struct device *d= ev, struct tcpc_dev *tcpc) if (err < 0) goto out_destroy_wq; =20 + tcpm_fw_get_timings(port, tcpc->fwnode); + port->try_role =3D port->typec_caps.prefer_role; =20 port->typec_caps.revision =3D 0x0120; /* Type-C spec release 1.2 */ --=20 2.47.0.105.g07ac214952-goog