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Message-Id: <20240813-i3c_fix-v2-8-68fe4a050188@nxp.com>
Date: Tue, 13 Aug 2024 11:15:06 -0400
From: Frank Li <Frank.Li@....com>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>,
Boris Brezillon <boris.brezillon@...labora.com>,
Parshuram Thombare <pthombar@...ence.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Boris Brezillon <bbrezillon@...nel.org>, Arnd Bergmann <arnd@...db.de>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Conor Culhane <conor.culhane@...vaco.com>
Cc: linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org,
imx@...ts.linux.dev, Frank Li <Frank.Li@....com>
Subject: [PATCH v2 08/11] i3c: master: svc: need check IBIWON for dynamtica
address assign
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@....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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