TCPMv2: Make VDM ACKs available to the AP

When the AP is supplying VDM REQ messages, the responses should be
delivered to the AP after the message has either sent or failed to send.
Add storage of the reply in the DPM.

BRANCH=None
BUG=b:208884535
TEST=./twister -T ./zephyr/test, on skyrim ensure VDM responses and
events are seen for both successful and unsuccessful REQs

Signed-off-by: Diana Z <dzigterman@chromium.org>
Change-Id: Ica713c3b3f3f571f193c1458a0e28788cd205c72
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3990995
Reviewed-by: Abe Levkoy <alevkoy@chromium.org>
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/util/ectool.cc b/util/ectool.cc
index 3c4b190c3c..76e617e3ba 100644
--- a/util/ectool.cc
+++ b/util/ectool.cc
@@ -342,6 +342,8 @@ const char help_str[] =
 	"      Get discovery information for port and type\n"
 	"  typecstatus <port>\n"
 	"      Get status information for port\n"
+	"  typecvdmresponse <port>\n"
+	"      Get last VDM response for AP-requested VDM\n"
 	"  uptimeinfo\n"
 	"      Get info about how long the EC has been running and the most\n"
 	"      recent AP resets\n"
@@ -10600,6 +10602,45 @@ int cmd_typec_status(int argc, char *argv[])
 	return 0;
 }
 
+int cmd_typec_vdm_response(int argc, char *argv[])
+{
+	struct ec_params_typec_vdm_response p;
+	struct ec_response_typec_vdm_response *r =
+		(ec_response_typec_vdm_response *)ec_inbuf;
+	char *endptr;
+	int rv, i;
+
+	if (argc != 2) {
+		fprintf(stderr,
+			"Usage: %s <port>\n"
+			"  <port> is the type-c port to query\n",
+			argv[0]);
+		return -1;
+	}
+
+	p.port = strtol(argv[1], &endptr, 0);
+	if (endptr && *endptr) {
+		fprintf(stderr, "Bad port\n");
+		return -1;
+	}
+
+	rv = ec_command(EC_CMD_TYPEC_VDM_RESPONSE, 0, &p, sizeof(p), ec_inbuf,
+			ec_max_insize);
+	if (rv < 0)
+		return -1;
+
+	if (r->vdm_data_objects > 0) {
+		printf("VDM response from partner: %d", r->partner_type);
+		for (i = 0; i < r->vdm_data_objects; i++)
+			printf("\n  0x%08x", r->vdm_response[i]);
+		printf("\n");
+	} else {
+		printf("No VDM response found\n");
+	}
+
+	return 0;
+}
+
 int cmd_tp_self_test(int argc, char *argv[])
 {
 	int rv;
@@ -11078,6 +11119,7 @@ const struct command commands[] = {
 	{ "typeccontrol", cmd_typec_control },
 	{ "typecdiscovery", cmd_typec_discovery },
 	{ "typecstatus", cmd_typec_status },
+	{ "typecvdmresponse", cmd_typec_vdm_response },
 	{ "uptimeinfo", cmd_uptimeinfo },
 	{ "usbchargemode", cmd_usb_charge_set_mode },
 	{ "usbmux", cmd_usb_mux },