[PATCH v3 08/11] i3c: master: svc: need check IBIWON for dynamtica address assign

From: Frank Li <Frank.Li@nxp.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
	 Boris Brezillon <boris.brezillon@collabora.com>,
	 Parshuram Thombare <pthombar@cadence.com>,
	 Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	 Boris Brezillon <bbrezillon@kernel.org>,
	Arnd Bergmann <arnd@arndb.de>,
	 Miquel Raynal <miquel.raynal@bootlin.com>,
	 Conor Culhane <conor.culhane@silvaco.com>
Cc: linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org,
	 imx@lists.linux.dev, Frank Li <Frank.Li@nxp.com>
Subject: [PATCH v3 08/11] i3c: master: svc: need check IBIWON for dynamtica address assign
Date: Mon, 19 Aug 2024 12:02:02 -0400	[thread overview]
Message-ID: <20240819-i3c_fix-v3-8-7d69f7b0a05e@nxp.com> (raw)
In-Reply-To: <20240819-i3c_fix-v3-0-7d69f7b0a05e@nxp.com>

When sending REQUEST_PROC_DAA, emit START and address 7E. Address
arbitration may occur at this time if other devices trigger HJ, IBI, or
CR events.

When IBIWON happen at REQUEST_PROC_DAA, nack IBI request then use repeat
start to continue current dynamtica address assign.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/i3c/master/svc-i3c-master.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index d665639523e3c..161ccd824443b 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -808,6 +808,9 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
 	int ret, i;
 
 	while (true) {
+		/* clean SVC_I3C_MINT_IBIWON w1c bits */
+		writel(SVC_I3C_MINT_IBIWON, master->regs + SVC_I3C_MSTATUS);
+
 		/* SVC_I3C_MCTRL_REQUEST_PROC_DAA have two mode, ENTER DAA or PROCESS DAA.
 		 *
 		 * ENTER DAA:
@@ -859,6 +862,9 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
 			ret = svc_i3c_master_readb(master, data, 2);
 			if (ret)
 				break;
+		} else if (SVC_I3C_MSTATUS_IBIWON(reg)) {
+			svc_i3c_master_handle_ibi_won(master, reg);
+			continue;
 		} else if (SVC_I3C_MSTATUS_MCTRLDONE(reg)) {
 			if (SVC_I3C_MSTATUS_STATE_IDLE(reg) &&
 			    SVC_I3C_MSTATUS_COMPLETE(reg)) {

-- 
2.34.1


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