[PATCH 08/10] usb: typec: ucsi: displayport: Propagate DP altmode entry result

[Andrei Kuchynski <akuchynski@chromium.org>]

The `DP_CMD_CONFIGURE` VDM is the final step in the DisplayPort alternate
mode entry sequence. Reporting the error code from this command back to
the Type-C mode selection logic allows the detailed result to be propagated
to user space.

Signed-off-by: Andrei Kuchynski <akuchynski@chromium.org>
---
 drivers/usb/typec/ucsi/displayport.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/displayport.c
index 8aae80b457d7..6f754e696d93 100644
--- a/drivers/usb/typec/ucsi/displayport.c
+++ b/drivers/usb/typec/ucsi/displayport.c
@@ -241,7 +241,9 @@ static int ucsi_displayport_vdm(struct typec_altmode *alt,
 			break;
 		case DP_CMD_CONFIGURE:
 			dp->data.conf = *data;
-			if (ucsi_displayport_configure(dp)) {
+			dp->data.error = ucsi_displayport_configure(dp);
+			if (dp->data.error) {
+				dp->vdo_data = &dp->data.error;
 				dp->header |= VDO_CMDT(CMDT_RSP_NAK);
 			} else {
 				dp->header |= VDO_CMDT(CMDT_RSP_ACK);
-- 
2.50.0.rc1.591.g9c95f17f64-goog