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

Frank Li
2024-08-19T16:03:22Z

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