i3c: master: svc: need check IBIWON for dynamic address assignment

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 during a REQUEST_PROC_DAA, NACK the IBI request then
send a repeated start to continue current dynamic address assignment.

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20241002-svc-i3c-hj-v6-3-7e6e1d3569ae@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index c35a228..5df0ec0 100644 (file)
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -872,6 +872,9 @@ 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:
@@ -923,6 +926,9 @@ 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)) {