i3c: master: svc: skip address resend on repeat START

According to the I3C specification, address arbitration only happens during
the START. Repeated START do not initiate arbitration, and In-Band
Interrupts (IBIs) cannot occur at this stage.

Resending the address upon a NACK in a repeat START is therefore redundant
and unnecessary. Avoid redundant retries, improving efficiency and ensuring
protocol compliance.

Signed-off-by: Frank Li <[email protected]>
Reviewed-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Belloni <[email protected]>

Author: nxpfrankli

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

@@ -1277,9 +1277,9 @@ static int svc_i3c_master_write(struct svc_i3c_master *master,
 static int svc_i3c_master_xfer(struct svc_i3c_master *master,
 			       bool rnw, unsigned int xfer_type, u8 addr,
 			       u8 *in, const u8 *out, unsigned int xfer_len,
-			       unsigned int *actual_len, bool continued)
+			       unsigned int *actual_len, bool continued, bool repeat_start)
 {
-	int retry = 2;
+	int retry = repeat_start ? 1 : 2;
 	u32 reg;
 	int ret;
 
@@ -1464,7 +1464,7 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master)
 		ret = svc_i3c_master_xfer(master, cmd->rnw, xfer->type,
 					  cmd->addr, cmd->in, cmd->out,
 					  cmd->len, &cmd->actual_len,
-					  cmd->continued);
+					  cmd->continued, i > 0);
 		/* cmd->xfer is NULL if I2C or CCC transfer */
 		if (cmd->xfer)
 			cmd->xfer->actual_len = cmd->actual_len;