From: Prashant Malani <pmalani@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Prashant Malani <pmalani@chromium.org>,
Benson Leung <bleung@chromium.org>,
Enric Balletbo i Serra <enric.balletbo@collabora.com>,
Guenter Roeck <groeck@chromium.org>
Subject: [PATCH] platform/chrome: cros_ec_typec: Add DP mode check
Date: Tue, 20 Apr 2021 21:21:09 -0700 [thread overview]
Message-ID: <20210421042108.2002-1-pmalani@chromium.org> (raw)
There are certain transitional situations where the dp_mode field in the
PD_CONTROL response might not be populated with the right DP pin
assignment value yet. Add a check for that to avoid sending an invalid
value to the Type C mode switch.
Signed-off-by: Prashant Malani <pmalani@chromium.org>
---
drivers/platform/chrome/cros_ec_typec.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index d3df1717a5fd..69646262fa9d 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -486,6 +486,11 @@ static int cros_typec_enable_dp(struct cros_typec_data *typec,
return -ENOTSUPP;
}
+ if (!pd_ctrl->dp_mode) {
+ dev_err(typec->dev, "No valid DP mode provided.\n");
+ return -EINVAL;
+ }
+
/* Status VDO. */
dp_data.status = DP_STATUS_ENABLED;
if (port->mux_flags & USB_PD_MUX_HPD_IRQ)
--
2.31.1.368.gbe11c130af-goog
next reply other threads:[~2021-04-21 4:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-21 4:21 Prashant Malani [this message]
2021-04-23 6:57 ` [PATCH] platform/chrome: cros_ec_typec: Add DP mode check Enric Balletbo i Serra
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