Commit 6a12f56f authored by Frank Li's avatar Frank Li Committed by Alexandre Belloni
Browse files

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: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: default avatarFrank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20241002-svc-i3c-hj-v6-3-7e6e1d3569ae@nxp.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent e22405a8

drivers/i3c/master/svc-i3c-master.c

+6 −0
Original line number Diff line number Diff line
@@ -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)) {