From patchwork Tue Aug 16 03:33:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 598453 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A018CC2BB41 for ; Tue, 16 Aug 2022 07:09:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231741AbiHPHJU (ORCPT ); Tue, 16 Aug 2022 03:09:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231767AbiHPHIx (ORCPT ); Tue, 16 Aug 2022 03:08:53 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1CDC4DF1F for ; Mon, 15 Aug 2022 20:34:04 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-31f56f635a9so87471567b3.4 for ; Mon, 15 Aug 2022 20:34:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:mime-version:message-id:date:from:to:cc; bh=oMq/Q0WHMdmeoiF7vE7Sk5AVWHJOEA/+2leGxl7BaOM=; b=jEX3tw6kAvwKDBcJUacrjtB/w8b83gno5Cqq2GKEkaxcB8D5G2hK2C9IeD9ZiSL3tJ ngYwklOzyYTyZGmcBptO6SjQhS5hb+Ro02RbJ7EOUdQKCKjBrE9Pc/5Fb68lLooOvjom tGzM1FAXVxEAu9ybLouoni/W0u1AXiGel2Otzu0JQy/f+v3Qe+5cMFPmx+6SheXBqv/0 TacO5kK23T+qrtlWrsjwdiZ/9KSsDinphR5deklejHbTelyiDw62FXidu/RcD/2eVDxb gv3q9+gWXyQCl1Cm6PEIf+nOFiL2V3ujC2VBDjsIRKBRkCKzcTv8Rpn2YFKs9z4sRS/I 7qsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc; bh=oMq/Q0WHMdmeoiF7vE7Sk5AVWHJOEA/+2leGxl7BaOM=; b=uHIwRKyUhISknGHbyUMLoXiwC5p+r50U/O7q3OPXmYQrkgbhi6oeNbKt/kklYBCtuH QL/xXO5sSfRi5wy28gBTwJL4B6nccwv5astac8O8EnLT1yb5/naiyeYjrJaRtTHpzNXj f01CrMJZUqvIwxCae6/ho2rMH/kzi8lUPA80SSYQI9eW45KXGFaqNL/G1siGNIqbbGcd RPI94rCQQFdt2Y7u5rc6kqlaF8y2gRrKLScLsSqPVnEBtazwiUBS6exaydrZLWzyFh7t wKhFa7cQqncFGtB78PaaXFN9HQoa8pJVzqAmod14/IdKIiqN7QDxeHC9u9e+nsGfe/zA 4wEA== X-Gm-Message-State: ACgBeo0F/iK/8lYdV1rjOPf2xUEvLVqVtZD+8xIYZlhTgbTX5gETN8Mw gcYYF3E08LSSZPdJVc7fh2IstAA1oFE= X-Google-Smtp-Source: AA6agR6KjiGB15ddrWa5pYYcMxKojrKX+siy+E/PK6VYC4sBn9NBPVjOxLyJ83WGbD10odAgr/A2D35Jupo= X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:d4d8:f172:2a2f:bd53]) (user=badhri job=sendgmr) by 2002:a0d:fd05:0:b0:329:3836:53ac with SMTP id n5-20020a0dfd05000000b00329383653acmr16017944ywf.455.1660620843599; Mon, 15 Aug 2022 20:34:03 -0700 (PDT) Date: Mon, 15 Aug 2022 20:33:55 -0700 Message-Id: <20220816033355.1259400-1-badhri@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.37.1.595.g718a3a8f04-goog Subject: [PATCH v1] usb: typec: tcpm: Return ENOTSUPP for power supply prop writes From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kyle Tso , stable@vger.kernel.org, Badhri Jagan Sridharan Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When the port does not support USB PD, prevent transition to PD only states when power supply property is written. In this case, TCPM transitions to SNK_NEGOTIATE_CAPABILITIES which should not be the case given that the port is not pd_capable. [ 84.308251] state change SNK_READY -> SNK_NEGOTIATE_CAPABILITIES [rev3 NONE_AMS] [ 84.308335] Setting usb_comm capable false [ 84.323367] set_auto_vbus_discharge_threshold mode:3 pps_active:n vbus:5000 ret:0 [ 84.323376] state change SNK_NEGOTIATE_CAPABILITIES -> SNK_WAIT_CAPABILITIES [rev3 NONE_AMS] Signed-off-by: Badhri Jagan Sridharan --- drivers/usb/typec/tcpm/tcpm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index ea5a917c51b1..904c7b4ce2f0 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -6320,6 +6320,13 @@ static int tcpm_psy_set_prop(struct power_supply *psy, struct tcpm_port *port = power_supply_get_drvdata(psy); int ret; + /* + * All the properties below are related to USB PD. The check needs to be + * property specific when a non-pd related property is added. + */ + if (!port->pd_supported) + return -EOPNOTSUPP; + switch (psp) { case POWER_SUPPLY_PROP_ONLINE: ret = tcpm_psy_set_online(port, val);