From patchwork Wed Dec 11 03:07:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Sunil Dhamne via B4 Relay X-Patchwork-Id: 850751 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA4591FECAA; Wed, 11 Dec 2024 03:07:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733886446; cv=none; b=NtfH3BZ8bScStE2to5H4GSvO5HOAjuyU56Epaps9KeUfznyW5N3KMr/KW2lGBiZQ78uZK5Zo+iVtI6xO+Ink5WGDQXv0pCk/yzKPhQPN0BN2tzR68YDquA96cxWbIvBbtBEie5eALyMgwiDsEoZTluBK8K8zCmyzR/Kfos79g1E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733886446; c=relaxed/simple; bh=YnY9okmLhb2rO8nDQHC9+5DkEpZ8pF35PzYJ12Pfjgg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=rcdWQJDt2K88Q0bkUG+tWFw8nWFeVPTodEA+1PyHX7tE9GcQ09hPmbU2NfknGbcO19Y72XDy0xraFM96ESHkEW3/iFiJ75X63tPcmbS34ysZYV7SVbiMQwbpOp0v1DPlBKmpKEkt2z0RARpV2cEi7oujdZAijhHAz7Cjpdv5fok= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PPYDExPx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PPYDExPx" Received: by smtp.kernel.org (Postfix) with ESMTPS id 96E58C4CEE0; Wed, 11 Dec 2024 03:07:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733886445; bh=YnY9okmLhb2rO8nDQHC9+5DkEpZ8pF35PzYJ12Pfjgg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=PPYDExPxVc7BRKjZcuurAIpEm7akLs9ii7geehDLqw0RGyjbT5eLeK32npeh1aWAA hV2cdh7ZJlbIZlwIuk5FBEPK+cYye5G7tUDSY8e/kd9OjR4OK3pknAALQHhglIp+fl DbxMWCjv9BrvAfF+7rn31G0IrHC0A9Evv0IBhfa1EEhVlkpvEhTS5U0ljMG9fyKFiG qCi7NH4YnYB18FiOF/qsHe+8CVGw3DmdtxaR8zbHHwg5jxnGQn9xqmJSYTsgb56ad0 uksBIWZxfBv+V3rn7r4F5hdUrd21bnqKivzrAjD/32P3P6l0OxuwpuU949efiWiULY UPhFu8saFzygA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81B78E77183; Wed, 11 Dec 2024 03:07:25 +0000 (UTC) From: Amit Sunil Dhamne via B4 Relay Date: Tue, 10 Dec 2024 19:07:08 -0800 Subject: [PATCH v2 2/3] usb: typec: tcpm: Add support for parsing pd-revision DT property Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241210-get_rev_upstream-v2-2-d0094e52d48f@google.com> References: <20241210-get_rev_upstream-v2-0-d0094e52d48f@google.com> In-Reply-To: <20241210-get_rev_upstream-v2-0-d0094e52d48f@google.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , Badhri Jagan Sridharan , Heikki Krogerus Cc: Kyle Tso , RD Babiera , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Amit Sunil Dhamne X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1733886444; l=3819; i=amitsd@google.com; s=20241031; h=from:subject:message-id; bh=ZW21PLDCuXrKmljq+jN/SmgnnmS/lrVcV0OJXDrQ1ss=; b=+Ck5oNB/ElrMm+RfnlnYn1wZ5E8R/15GJ7yUCc8n6abVyxyB6HjMQWBkp15kAfU+8HbBb2ZB6 1YTydniyDJGAUNUOlqdWm7kr5T4x83B22cRV5EjF3X7/iwh6H26ll11 X-Developer-Key: i=amitsd@google.com; a=ed25519; pk=wD+XZSST4dmnNZf62/lqJpLm7fiyT8iv462zmQ3H6bI= X-Endpoint-Received: by B4 Relay for amitsd@google.com/20241031 with auth_id=262 X-Original-From: Amit Sunil Dhamne Reply-To: amitsd@google.com From: Amit Sunil Dhamne Add support for parsing "pd-revision" DT property in TCPM and store PD revision and version supported by the Type-C connnector. It should be noted that the PD revision is the maximum possible revision supported by the port. This is different from the 2 bit revision set in PD msg headers. The purpose of the 2 bit revision value is to negotiate between Rev 2.X & 3.X spec rev as part of contract negotiation, while this is used for Get_Revision AMS after a contract is in place. Signed-off-by: Amit Sunil Dhamne Reviewed-by: Badhri Jagan Sridharan --- drivers/usb/typec/tcpm/tcpm.c | 46 +++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 44 insertions(+), 2 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 6021eeb903fec53316dfa2d6b825c334d55b7cab..59621cfaee3d67a36f3ad6870bd1aa92d382f33a 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -310,6 +310,13 @@ struct pd_data { unsigned int operating_snk_mw; }; +struct pd_revision_info { + u8 rev_major; + u8 rev_minor; + u8 ver_major; + u8 ver_minor; +}; + /* * @sink_wait_cap_time: Deadline (in ms) for tTypeCSinkWaitCap timer * @ps_src_wait_off_time: Deadline (in ms) for tPSSourceOff timer @@ -567,6 +574,9 @@ struct tcpm_port { /* Timer deadline values configured at runtime */ struct pd_timings timings; + + /* Indicates maximum (revision, version) supported */ + struct pd_revision_info pd_rev; #ifdef CONFIG_DEBUG_FS struct dentry *dentry; struct mutex logbuffer_lock; /* log buffer access lock */ @@ -7036,7 +7046,9 @@ static void tcpm_port_unregister_pd(struct tcpm_port *port) static int tcpm_port_register_pd(struct tcpm_port *port) { - struct usb_power_delivery_desc desc = { port->typec_caps.pd_revision }; + u16 pd_revision = port->typec_caps.pd_revision; + u16 pd_version = port->pd_rev.ver_major << 8 | port->pd_rev.ver_minor; + struct usb_power_delivery_desc desc = { pd_revision, pd_version }; struct usb_power_delivery_capabilities *cap; int ret, i; @@ -7331,6 +7343,29 @@ static int tcpm_fw_get_snk_vdos(struct tcpm_port *port, struct fwnode_handle *fw return 0; } +static void tcpm_fw_get_pd_revision(struct tcpm_port *port, struct fwnode_handle *fwnode) +{ + int ret; + u8 val[4]; + + ret = fwnode_property_count_u8(fwnode, "pd-revision"); + if (!ret || ret != 4) { + tcpm_log(port, "Unable to find pd-revision property or incorrect array size"); + return; + } + + ret = fwnode_property_read_u8_array(fwnode, "pd-revision", val, 4); + if (ret) { + tcpm_log(port, "Failed to parse pd-revision, ret:(%d)", ret); + return; + } + + port->pd_rev.rev_major = val[0]; + port->pd_rev.rev_minor = val[1]; + port->pd_rev.ver_major = val[2]; + port->pd_rev.ver_minor = val[3]; +} + /* Power Supply access to expose source power information */ enum tcpm_psy_online_states { TCPM_PSY_OFFLINE = 0, @@ -7669,11 +7704,18 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) goto out_destroy_wq; tcpm_fw_get_timings(port, tcpc->fwnode); + tcpm_fw_get_pd_revision(port, tcpc->fwnode); port->try_role = port->typec_caps.prefer_role; port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */ - port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */ + + if (port->pd_rev.rev_major) + port->typec_caps.pd_revision = port->pd_rev.rev_major << 8 | + port->pd_rev.rev_minor; + else + port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */ + port->typec_caps.svdm_version = SVDM_VER_2_0; port->typec_caps.driver_data = port; port->typec_caps.ops = &tcpm_ops;