From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8C509E98E10 for ; Mon, 23 Feb 2026 09:21:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ofmlK69htiQwSR3SO75OYXmaAe/tnT8sSqxh8kjOjuM=; b=D3SrFDfPjwu/OO muMe65MSMibFqd/SYV96sAILwUrWK+6Cx0aWOGF9PSNHnvemvnlfaJj9443ieuJc/FPbEYiaE5OAh pB4KCSc8IcrVDWeYmbmzIG62Jx9Qlav6TDqrE+vJ4lisfx0QxovURiBYrfnr8mCI4QQsaQF7U3TGu qybrCADetmKWS05yMvS0HTrJMVpkejtr7mBpfoRbwIzfFIeeacnPiGZjOspPjAJKZDYTY3bwnRttH LLs1/ryD8jNCCL23gvIIJsqFVuujESHYckusMqUbmXbyzbXQrPtKYInB4NBzDwfISGKwKFZ++4WGb Xheb+pkmyAJzCOlvubxg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vuS7j-0000000HWmY-0z8r; Mon, 23 Feb 2026 09:21:03 +0000 Received: from mgamail.intel.com ([192.198.163.15]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vuS7f-0000000HWk8-0sBk for linux-i3c@lists.infradead.org; Mon, 23 Feb 2026 09:21:00 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1771838459; x=1803374459; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=nJoS04WRIbALpdyQ4/xt0PHkkGiWif0IWZzmhvBHJLw=; b=VzRNIGVmrjBKYMJsLLnXuI6hMhshtwYkPrgrWRbH0YFmzCp0KR1CVUN7 ybH1EhXBPLbW/8gqsbr6Qy6O6T4DVc5X1VQQW5lGaFVzIdPBUTu8Y+LsV YkCsGiiSk6JS9cZoofIrQQHmTTOE1JUw56ToK4i0UJoekibxtbO9WDe/0 +Cj1X0tDqPWWLHgsapg5aW6ozoIrgvbJIxXH23/oiNxB5uIDQHjjOSP/P P3DeHFFtB0mmWiZpsD/6T2fmQQoc+CVZNCDGvRVUDcHldE1BukgXKFbZT SgMCphbIXYonoa1+VDrlTOqcesve7x2Mj5wScRXKt/3oCQ1HWAN1DtW8l g==; X-CSE-ConnectionGUID: k2WJAM5fSqK7OdoABH9a2Q== X-CSE-MsgGUID: G6JYDeP5R/O9Rn0Z29UVaQ== X-IronPort-AV: E=McAfee;i="6800,10657,11709"; a="72928696" X-IronPort-AV: E=Sophos;i="6.21,306,1763452800"; d="scan'208";a="72928696" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Feb 2026 01:20:57 -0800 X-CSE-ConnectionGUID: n3u8m63KQdCeNyclllsyCw== X-CSE-MsgGUID: SJk1sgUSQQ6KapCAuF5Guw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,306,1763452800"; d="scan'208";a="215346062" Received: from fpallare-mobl4.ger.corp.intel.com (HELO ahunter6-desk) ([10.245.245.206]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Feb 2026 01:20:56 -0800 From: Adrian Hunter To: alexandre.belloni@bootlin.com Cc: Frank.Li@nxp.com, rafael@kernel.org, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH V4 2/5] i3c: mipi-i3c-hci: Add quirk to allow IBI while runtime suspended Date: Mon, 23 Feb 2026 11:20:38 +0200 Message-ID: <20260223092041.104689-3-adrian.hunter@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260223092041.104689-1-adrian.hunter@intel.com> References: <20260223092041.104689-1-adrian.hunter@intel.com> MIME-Version: 1.0 Organization: Intel Finland Oy, Registered Address: c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo, Business Identity Code: 0357606 - 4, Domiciled in Helsinki X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260223_012059_264729_E8A84529 X-CRM114-Status: GOOD ( 12.03 ) X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org Some I3C controllers can be automatically runtime-resumed in order to handle in-band interrupts (IBIs), meaning that runtime suspend does not need to be blocked when IBIs are enabled. For example, a PCI-attached controller in a low-power state may generate a Power Management Event (PME) when the SDA line is pulled low to signal the START condition of an IBI. The PCI subsystem will then runtime-resume the device, allowing the IBI to be received without requiring the controller to remain active. Introduce a new quirk, HCI_QUIRK_RPM_IBI_ALLOWED, so that drivers can opt-in to this capability via driver data. Signed-off-by: Adrian Hunter Reviewed-by: Frank Li --- Changes in V4: None Changes in V3: Add Frank's Rev'd-by Changes in V2: None drivers/i3c/master/mipi-i3c-hci/core.c | 3 +++ drivers/i3c/master/mipi-i3c-hci/hci.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/i3c/master/mipi-i3c-hci/core.c b/drivers/i3c/master/mipi-i3c-hci/core.c index e925584113d1..ec4dbe64c35e 100644 --- a/drivers/i3c/master/mipi-i3c-hci/core.c +++ b/drivers/i3c/master/mipi-i3c-hci/core.c @@ -959,6 +959,9 @@ static int i3c_hci_probe(struct platform_device *pdev) if (hci->quirks & HCI_QUIRK_RPM_ALLOWED) i3c_hci_rpm_enable(&pdev->dev); + if (hci->quirks & HCI_QUIRK_RPM_IBI_ALLOWED) + hci->master.rpm_ibi_allowed = true; + return i3c_master_register(&hci->master, &pdev->dev, &i3c_hci_ops, false); } diff --git a/drivers/i3c/master/mipi-i3c-hci/hci.h b/drivers/i3c/master/mipi-i3c-hci/hci.h index 6035f74212db..819328a85b84 100644 --- a/drivers/i3c/master/mipi-i3c-hci/hci.h +++ b/drivers/i3c/master/mipi-i3c-hci/hci.h @@ -146,6 +146,7 @@ struct i3c_hci_dev_data { #define HCI_QUIRK_OD_PP_TIMING BIT(3) /* Set OD and PP timings for AMD platforms */ #define HCI_QUIRK_RESP_BUF_THLD BIT(4) /* Set resp buf thld to 0 for AMD platforms */ #define HCI_QUIRK_RPM_ALLOWED BIT(5) /* Runtime PM allowed */ +#define HCI_QUIRK_RPM_IBI_ALLOWED BIT(6) /* IBI and Hot-Join allowed while runtime suspended */ /* global functions */ void mipi_i3c_hci_resume(struct i3c_hci *hci); -- 2.51.0 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c