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platform/chrome: cros_ec_typec: Add DP mode check

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[ Upstream commit c5bb32f57bf3a30ed03be51f7be0840325ba8b4a ]

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>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210421042108.2002-1-pmalani@chromium.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Prashant Malani 2021-04-20 21:21:09 -07:00 committed by Greg Kroah-Hartman
parent b01b7999f4
commit 6a40e3f9a8
1 changed files with 5 additions and 0 deletions
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5
drivers/platform/chrome/cros_ec_typec.c
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@ -475,6 +475,11 @@ 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)