From patchwork Thu Sep 19 07:51:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Sunil Dhamne X-Patchwork-Id: 830005 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 E89E4196C6C for ; Thu, 19 Sep 2024 07:51:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726732314; cv=none; b=VfSYU2jc/7VjU1k9EcDHH6JcYN6Tl6j/o7VhwhfduazwfQRAq8CrWtn4tKf2M6esMfMXnqNF/xIBxd/1ijHvhnRgYnjeUHU/sqTRH+UkF1QWpKbLibqISuyWZpGzL0r/JAdZhhc6mBfVRWy+uR7OYUoghZkZuaS5mNIKA1SIlDY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726732314; c=relaxed/simple; bh=zZnseITWVWZj2AGJkDJn90KqZ2Yp82OoU2mAKYn4grY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=P9dyZNcegXCsuK5W1Vd2of/47Y0UYe3ycsaBGMze1De86xRBi7alTIRMwg/vAhw4TxngTtBu3SRfi+OaEoXwAR44VmTZvfMovVKNgCxM9UaAmGFKuWJbEvVBAL620qfeE2SOLR/3B3aJUPJLJDHwNBBgfTxaGYBC+9fdRh28r3M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--amitsd.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=ZgjVtwI0; arc=none smtp.client-ip=209.85.219.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--amitsd.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ZgjVtwI0" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-e202bc54767so299079276.0 for ; Thu, 19 Sep 2024 00:51:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1726732312; x=1727337112; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=0xVjjERkvMrFJJbsLLMi62ReVgaN5cy3KLYRgp90y8Y=; b=ZgjVtwI0EY8ug6ZChGh0XLoPB32O2lT/hQU0cF7QJ8qmiftGU9Z6vP/v/B6H2v+ReT Hhlp6hKx2nCIDCnv9xeuKSrNzuY08MgDxSkEfcCV3qf/DALbCf4APbDWj2sg9e3VWtcI x2No37fgIef8oKbjcNTrJtr2YXKUTa/GddVe2L8i//w3o5WXT4OBeKCksj8scA14q1fw htvGmcA9HTv3bUT1PKkrRF06EeJ+SKkY2wVN2HjBuH6KNojLCU3sBiDHDG3fz0bhX6ZV OolkUL+fO7C4X4q6CCCvusdSyi3a4SeN7fhNfsF7W9t6CUuJRe7oPz+j/BNAZ9Nrm2FF MmSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726732312; x=1727337112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=0xVjjERkvMrFJJbsLLMi62ReVgaN5cy3KLYRgp90y8Y=; b=iZslAwyWj0dm8JdEeaY2kUkuFsbc9FdmVJvg1KTsupMfiEPAoC11tN3O1wNKoUXYpg I3crZhkkc5TdJVJuHCdY0l371Dxxk8MyOSUfI3gLENP8L6dlleWJW+hpgM1nF5iElsTh ls/jUBuse+dVZvsvOJ9+CZtrGJeanrB3oqwjidY24prdRBjba9nevM5kRLXpeE91MG9A Zzr4ouQ/sfEXDcSsoXnGTp0Qq5aEczSc6/SFiE2CRcreLSr0ameBi1YbCaIpvNWmbOp7 j7Kc54CE6uyk9CaXfqNHupRI5AmHPgxPEflEwMRN3nqMxvQSWBmv/PEVlobLjPkUO6z6 fdhw== X-Forwarded-Encrypted: i=1; AJvYcCXDTlz3YgX9EqcegHi7VSlL4lu0qFTW54lQyT4IkM4/e+E+CW14T3otJ+yeJ4G50e3t/T4XhX9Bx5Y=@vger.kernel.org X-Gm-Message-State: AOJu0YwHpsiiSkU3xN06hJv08XxooCi0uVPYdo15rm4KXaabSjbzIW+D HF/63OTb42l9pqzUAeHWkfzv/pcgUimCs58ZPGpRlIScJH/HLOjwS1RdNRgjqKCI1z2rVWAVA9u 6oA== X-Google-Smtp-Source: AGHT+IGtkVUkfKsnL4jMkEz9zcuTeZE6Z2PZjQaP0YIqrH0doOWs08x0ygkJI/pVex3ZiVLgLSq++5r+V3o= X-Received: from amitsd-gti.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:827]) (user=amitsd job=sendgmr) by 2002:a25:7a04:0:b0:e0e:89e6:aad4 with SMTP id 3f1490d57ef6-e1d9dabc469mr58339276.0.1726732311959; Thu, 19 Sep 2024 00:51:51 -0700 (PDT) Date: Thu, 19 Sep 2024 00:51:13 -0700 In-Reply-To: <20240919075120.328469-1-amitsd@google.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240919075120.328469-1-amitsd@google.com> X-Mailer: git-send-email 2.46.0.792.g87dc391469-goog Message-ID: <20240919075120.328469-2-amitsd@google.com> Subject: [RFC v2 1/2] dt-bindings: connector: Add properties to define time values From: Amit Sunil Dhamne To: gregkh@linuxfoundation.org, robh@kernel.org, dmitry.baryshkov@linaro.org, heikki.krogerus@linux.intel.com Cc: badhri@google.com, kyletso@google.com, rdbabiera@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Amit Sunil Dhamne This commit adds the following properties: * sink-wait-cap-time-ms * ps-source-off-time-ms * cc-debounce-time-ms This is to enable setting of platform/board specific timer values as these timers have a range of acceptable values. Signed-off-by: Amit Sunil Dhamne --- .../bindings/connector/usb-connector.yaml | 32 ++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml index fb216ce68bb3..5efa4ea3c41c 100644 --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml @@ -253,6 +253,33 @@ properties: additionalProperties: false + sink-wait-cap-time-ms: + description: Represents the max time in ms that USB Type-C port (in sink + role) should wait for the port partner (source role) to send source caps. + SinkWaitCap timer starts when port in sink role attaches to the source. + 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. If no value is set for + this property then the driver assumes a default value of PD_T_SINK_WAIT_CAP + (defined in include/linux/usb/pd.h). + + ps-source-off-time-ms: + description: Represents the max time in ms that a DRP in source role should + take to turn off power after the PsSourceOff timer starts. PsSourceOff + timer starts when a sink's PHY layer receives EOP of the GoodCRC message + (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 PHY + layer. A timeout shall lead to error recovery in the type-c port. If no + value is set for this property then the driver assumes a default value of + PD_T_PS_SOURCE_OFF (defined in include/linux/usb/pd.h). + + 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. If no value is set for this + property then the driver assumes a default value of PD_T_CC_DEBOUNCE + (defined in include/linux/usb/pd.h). + dependencies: sink-vdos-v1: [ sink-vdos ] sink-vdos: [ sink-vdos-v1 ] @@ -380,7 +407,7 @@ examples: }; # 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 +420,9 @@ examples: sink-pdos = ; op-sink-microwatt = <10000000>; + sink-wait-cap-time-ms = <465>; + ps-source-off-time-ms = <835>; + cc-debounce-time-ms = <101>; }; }; From patchwork Thu Sep 19 07:51:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Sunil Dhamne X-Patchwork-Id: 829811 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 D3456197A67 for ; 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Thu, 19 Sep 2024 00:51:55 -0700 (PDT) Date: Thu, 19 Sep 2024 00:51:14 -0700 In-Reply-To: <20240919075120.328469-1-amitsd@google.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240919075120.328469-1-amitsd@google.com> X-Mailer: git-send-email 2.46.0.792.g87dc391469-goog Message-ID: <20240919075120.328469-3-amitsd@google.com> Subject: [RFC v2 2/2] usb: typec: tcpm: Add support for parsing time dt properties From: Amit Sunil Dhamne To: gregkh@linuxfoundation.org, robh@kernel.org, dmitry.baryshkov@linaro.org, heikki.krogerus@linux.intel.com Cc: badhri@google.com, kyletso@google.com, rdbabiera@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Amit Sunil Dhamne 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 Acked-by: Dmitry Baryshkov --- drivers/usb/typec/tcpm/tcpm.c | 81 ++++++++++++++++++++++++++++------- 1 file changed, 65 insertions(+), 16 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 4b02d6474259..e6c243bc44f7 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; }; +/* + * @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; @@ -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 *port) 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; 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 != TYPEC_CC_OPEN && port->cc2 == 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 *port) if (port->vbus_never_low) { port->vbus_never_low = 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 = 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; /* 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; /* AMS intermediate state */ @@ -6157,7 +6172,7 @@ static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port) 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 +7068,35 @@ static int tcpm_port_register_pd(struct tcpm_port *port) return ret; } +static int tcpm_fw_get_timings(struct tcpm_port *port, struct fwnode_handle *fwnode) +{ + int ret; + u32 val; + + if (!fwnode) + return -EINVAL; + + ret = fwnode_property_read_u32(fwnode, "sink-wait-cap-time-ms", &val); + if (!ret) + port->timings.sink_wait_cap_time = val; + else + port->timings.sink_wait_cap_time = PD_T_SINK_WAIT_CAP; + + ret = fwnode_property_read_u32(fwnode, "ps-source-off-time-ms", &val); + if (!ret) + port->timings.ps_src_off_time = val; + else + port->timings.ps_src_off_time = PD_T_PS_SOURCE_OFF; + + ret = fwnode_property_read_u32(fwnode, "cc-debounce-time-ms", &val); + if (!ret) + port->timings.cc_debounce_time = val; + else + port->timings.cc_debounce_time = PD_T_CC_DEBOUNCE; + + return 0; +} + static int tcpm_fw_get_caps(struct tcpm_port *port, struct fwnode_handle *fwnode) { struct fwnode_handle *capabilities, *child, *caps = NULL; @@ -7608,9 +7652,14 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) init_completion(&port->pps_complete); tcpm_debugfs_init(port); + err = tcpm_fw_get_timings(port, tcpc->fwnode); + if (err < 0) + goto out_destroy_wq; + err = tcpm_fw_get_caps(port, tcpc->fwnode); if (err < 0) goto out_destroy_wq; + err = tcpm_fw_get_snk_vdos(port, tcpc->fwnode); if (err < 0) goto out_destroy_wq;