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a="70158284" X-IronPort-AV: E=Sophos;i="6.21,261,1763452800"; d="scan'208";a="70158284" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jan 2026 10:19:01 -0800 X-CSE-ConnectionGUID: EvvHSjuSTnK+KcRcB9zE4g== X-CSE-MsgGUID: r5UZsRcyT7KSWmAKjVuHtA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,261,1763452800"; d="scan'208";a="208255292" Received: from egrumbac-mobl6.ger.corp.intel.com (HELO ahunter6-desk) ([10.245.245.96]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jan 2026 10:18:59 -0800 From: Adrian Hunter To: alexandre.belloni@bootlin.com Cc: Frank.Li@nxp.com, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH 3/7] i3c: master: Mark last_busy on IBI when runtime PM is allowed Date: Thu, 29 Jan 2026 20:18:37 +0200 Message-ID: <20260129181841.130864-4-adrian.hunter@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260129181841.130864-1-adrian.hunter@intel.com> References: <20260129181841.130864-1-adrian.hunter@intel.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 Content-Transfer-Encoding: 8bit When an IBI can be received after the controller is pm_runtime_put_autosuspend()'ed, the interrupt may occur just before the device is auto‑suspended. In such cases, the runtime PM core may not see any recent activity and may suspend the device earlier than intended. Mark the controller as last busy whenever an IBI is queued (when rpm_ibi_allowed is set) so that the auto-suspend delay correctly reflects recent bus activity and avoids premature suspension. Signed-off-by: Adrian Hunter --- drivers/i3c/master.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index bcc493dc9d04..dcc07ebc50a2 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2721,9 +2721,14 @@ static void i3c_master_unregister_i3c_devs(struct i3c_master_controller *master) */ void i3c_master_queue_ibi(struct i3c_dev_desc *dev, struct i3c_ibi_slot *slot) { + struct i3c_master_controller *master = i3c_dev_get_master(dev); + if (!dev->ibi || !slot) return; + if (master->rpm_ibi_allowed) + pm_runtime_mark_last_busy(master->rpm_dev); + atomic_inc(&dev->ibi->pending_ibis); queue_work(dev->ibi->wq, &slot->work); } -- 2.51.0