Received-SPF: pass (google.com: domain of linux-kernel+bounces-17648-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
From: Jai Luthra <j-luthra@ti.com>
Date: Fri, 5 Jan 2024 14:36:54 +0530
Subject: [PATCH] usb: typec: tipd: Separate reset for TPS6598x
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Message-ID: <20240105-next-tps-fix-v1-1-158cabaec168@ti.com>
To: Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Greg Kroah-Hartman
	<gregkh@linuxfoundation.org>,
        Javier Carrasco
	<javier.carrasco@wolfvision.net>
CC: <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <rogerq@kernel.org>, <r-gunasekaran@ti.com>, <vigneshr@ti.com>,
        <d-gole@ti.com>, Jai Luthra <j-luthra@ti.com>

Some platforms like SK-AM62, SK-AM62A cannot boot up to prompt if
TPS6598x is cold-reset during unconditionally on probe failures by
sending "GAID" sequence.

The probe can fail initially because USB0 remote-endpoint may not be
probed yet, which defines the usb-role-switch property.

Fixes: d49f90822015 ("usb: typec: tipd: add init and reset functions to tipd_data")
Closes: https://lore.kernel.org/linux-usb/vmngazj6si7xxss7txenezkcukqje2glhvvs7ipdcx3vjiqvlk@ohmmhhhlryws/
Signed-off-by: Jai Luthra <j-luthra@ti.com>
---
Boot-logs with this patch applied:
https://gist.github.com/jailuthra/b66d5722090ce1fbc2886986e53640f7
---
 drivers/usb/typec/tipd/core.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index a956eb976906..8ba2aa05db51 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -1223,11 +1223,16 @@ static int cd321x_reset(struct tps6598x *tps)
 	return 0;
 }
 
-static int tps6598x_reset(struct tps6598x *tps)
+static int tps25750_reset(struct tps6598x *tps)
 {
 	return tps6598x_exec_cmd_tmo(tps, "GAID", 0, NULL, 0, NULL, 2000, 0);
 }
 
+static int tps6598x_reset(struct tps6598x *tps)
+{
+	return 0;
+}
+
 static int
 tps25750_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
 {
@@ -1545,7 +1550,7 @@ static const struct tipd_data tps25750_data = {
 	.trace_status = trace_tps25750_status,
 	.apply_patch = tps25750_apply_patch,
 	.init = tps25750_init,
-	.reset = tps6598x_reset,
+	.reset = tps25750_reset,
 };
 
 static const struct of_device_id tps6598x_of_match[] = {

---
base-commit: e2425464bc87159274879ab30f9d4fe624b9fcd2
change-id: 20240105-next-tps-fix-904ed92bc1cc

Best regards,
-- 
Jai Luthra <j-luthra@ti.com>