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[2001:b400:e14e:87ac:83f9:7a00:1613:f224]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-38f089e3472sm4592446a91.3.2026.07.28.02.33.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jul 2026 02:33:06 -0700 (PDT) From: Jian-Ming Liao X-Google-Original-From: Jian-Ming Liao To: alexandre.belloni@bootlin.com Cc: Frank.Li@nxp.com, adrian.hunter@intel.com, jarkko.nikula@linux.intel.com, linux-i3c@lists.infradead.org, Jm_Liao@asmedia.com.tw, Chloe_Chen@asmedia.com.tw, Yd_Tseng@asmedia.com.tw, Patrick_Yen@asmedia.com.tw Subject: [PATCH v2 1/3] i3c: mipi-i3c-hci: Enable IBI threshold interrupt by default in PIO mode Date: Tue, 28 Jul 2026 17:32:36 +0800 Message-ID: <20260728093239.487156-2-Jm_Liao@asmedia.com.tw> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260728093239.487156-1-Jm_Liao@asmedia.com.tw> References: <20260709071744.333403-1-Jm_Liao@asmedia.com.tw> <20260728093239.487156-1-Jm_Liao@asmedia.com.tw> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260728_023308_286768_498383E1 X-CRM114-Status: GOOD ( 10.11 ) 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 Enable the IBI threshold interrupt (STAT_IBI_STATUS_THLD) by default during PIO initialization. This ensures that early IBIs from devices that have not yet formally requested IBI routing are properly captured, improving system responsiveness and stability. Co-developed-by: Patrick Yen Signed-off-by: Patrick Yen Signed-off-by: Jian-Ming Liao --- v2: - Removed "Hot-Join" references from the commit message and comments, as the change focuses strictly on enabling STAT_IBI_STATUS_THLD for general IBI reception per HCI spec. drivers/i3c/master/mipi-i3c-hci/pio.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/i3c/master/mipi-i3c-hci/pio.c b/drivers/i3c/master/mipi-i3c-hci/pio.c index ff2657ee220b..9df114ef0278 100644 --- a/drivers/i3c/master/mipi-i3c-hci/pio.c +++ b/drivers/i3c/master/mipi-i3c-hci/pio.c @@ -185,8 +185,13 @@ static void __hci_pio_init(struct i3c_hci *hci, u32 *size_val_ptr) pio_reg_write(INTR_SIGNAL_ENABLE, 0x0); pio_reg_write(INTR_STATUS_ENABLE, 0xffffffff); - /* Always accept error interrupts (will be activated on first xfer) */ - pio->enabled_irqs = STAT_ALL_ERRORS; + /* + * Always accept error interrupts (will be activated on first xfer). + * Also enable IBI threshold interrupt by default to ensure that IBIs + * are captured, even for devices that haven't formally requested + * IBI routing yet. + */ + pio->enabled_irqs = STAT_ALL_ERRORS | STAT_IBI_STATUS_THLD; } static void hci_pio_suspend(struct i3c_hci *hci) -- 2.43.0 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c