From nobody Fri Nov 29 06:52:46 2024 Received: from mail-yb1-f201.google.com (mail-yb1-f201.google.com [209.85.219.201]) (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 7A19114BF87 for ; Wed, 25 Sep 2024 03:11:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727233914; cv=none; b=m0DZwAD0470DGWkJK9GXrIa5OXcsGkKCpcghEPUOGBXPiH7moeJiZgrd4mVvwXeJnTaP4+zZ+N0NDSjpN7m9B/y/XA7IUDH4jUEmpzsofP6npnpb+kRAt7b1Oy8UQOSPxicXz5pcNHzX8ZDgkgckCyyAD2xREEnUJ3fbHl4khKk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727233914; c=relaxed/simple; bh=IUmkiF+knz9hs0ovUdm1Vj+4oa9bRHW0yd4qyfR0RRE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=rvyNhxxNBc7CRURJS2wHa7QLwfOIkKwO6iusPf0axfvBv+2/trv/qFeh/yxCcqVzGNjoOCRc0p5HC3rlqbzklc6Pwyd2iYUKkCodF5yeXOWT4vIPetsJavyfzx5ZrIkhw22bOp0Yqkr2IpSeDcRRJC5EwjPpIo3qkQBJUpuPJGU= 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=Hf1YRsE3; arc=none smtp.client-ip=209.85.219.201 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="Hf1YRsE3" Received: by mail-yb1-f201.google.com with SMTP id 3f1490d57ef6-e0b8fa94718so10418518276.0 for ; Tue, 24 Sep 2024 20:11:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1727233911; x=1727838711; 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=lNpn6Fg7tnJm0pUhtj1Rgrbxy0nCLf7PbUPZLOA7XRg=; b=Hf1YRsE3szG5KZbDlskMFUr5uovO0c2EYRONMz2TCuEaJs6hu72aJSKAHwbFLsghLN lzVpVSfes8uAgnVY4HU0GQU67dbO7jm4AtlM46Gm78vD3sLy6LWcOTZMqMs947Zub8X4 al4IAxEvVugtdygzDUVx0U3PV8q842F4obXUumg+qlBHIQWHmCFAu6g+uWYM6obXmPzp HlBfuZdE6/qRa5oVxKQie3I2rpiYSDqegO+5t36XIalDX4zjcmND8peEKm7Xn5GzPfTU Ilv+wNoLlG65CVeXNR0Pls/1WL3lO8jL0QViRFAOH2rS9JtNM7toNV8ordDM2f733e8p Errg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727233911; x=1727838711; 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=lNpn6Fg7tnJm0pUhtj1Rgrbxy0nCLf7PbUPZLOA7XRg=; b=kRXvJCAIsz/BMmNgsDRaCjK/aRD5koFWPNF6to+Kn7MC3Izoxe/rEdwxtDKmOEH8DB SXSe7CPjyhWb1IuyA83PkhIbCwfKqXPpGqvrhiAqlMdc6iEA8M9kY2ADLVpkYkx27u1o mVNjGjlAsT00mvixd03hfpXnrERc48n8e3xMx4kYu3hwIIVxuly+WchHzWX2thRcYcjP ObC0qiz+d4ZcUBbnTJD4ooZQetWn8MGym2wVVAqcAJ7kFwFL5Uvi4fsjNIhZAkjm/GRU A8miACbcF12eTA7uhfqD/k+7Y3HqbMv7okROtLO5le2P/JX9mxDLjjL6gG8ZxP5eHVGx 8hfw== X-Forwarded-Encrypted: i=1; AJvYcCUAhJVDseeVDJ3RH0jdNkXGJtzMlH3DnysxZ7hbUhD7fmgLBvmEUJJEiNQscw1rcSVqM7ZPB1pvU/MstDQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yxka74DJp58cyxuYgJo9uIyIUSBH5q7eBGE20W6ggNnamAggrgu Tf9Bu4h2YsAvU/Gwj+kepi4KLA72olvUJkiKtnLN0xRQNdeOCXNG5ZxoVZN07EshSuIho2+WwlG tkQ== X-Google-Smtp-Source: AGHT+IHGdy4BNzel59+U5u1vQl6UWt7exhB8DT1fxnO2MIX0ypO3O+hJqgpY4CYiRKBqe3Ykwf3OFwh9GRE= X-Received: from amitsd-gti.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:827]) (user=amitsd job=sendgmr) by 2002:a05:6902:292:b0:e1a:a29d:33f6 with SMTP id 3f1490d57ef6-e24d7825591mr7112276.3.1727233911438; Tue, 24 Sep 2024 20:11:51 -0700 (PDT) Date: Tue, 24 Sep 2024 20:11:31 -0700 In-Reply-To: <20240925031135.1101048-1-amitsd@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240925031135.1101048-1-amitsd@google.com> X-Mailer: git-send-email 2.46.0.792.g87dc391469-goog Message-ID: <20240925031135.1101048-3-amitsd@google.com> Subject: [RFC v4 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 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 4b02d6474259..5a661b925eba 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; @@ -7615,6 +7654,8 @@ 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 2.46.0.792.g87dc391469-goog