usb_pe: add PE state index in the comment

It's easier to reference if pd log level = 0.

BUG=none
TEST=zmake build -a
BRANCH=none

Change-Id: I64a95133f955d485d6ab9523949645b90eb330df
Signed-off-by: Eric Yilun Lin <yllin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4015620
Reviewed-by: Diana Z <dzigterman@chromium.org>
Commit-Queue: Eric Yilun Lin <yllin@google.com>
Reviewed-by: Sam Hurst <shurst@google.com>
Tested-by: Eric Yilun Lin <yllin@google.com>
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>

1 files changed, 79 insertions, 79 deletions

diff --git a/common/usbc/usb_pe_drp_sm.c b/common/usbc/usb_pe_drp_sm.c
index c6a61f1bd9..053fb96ff1 100644
--- a/common/usbc/usb_pe_drp_sm.c
+++ b/common/usbc/usb_pe_drp_sm.c
@@ -202,91 +202,91 @@ typedef int (*svdm_rsp_func)(int port, uint32_t *payload);
 /* List of all Policy Engine level states */
 enum usb_pe_state {
 	/* Super States */
-	PE_PRS_FRS_SHARED,
-	PE_VDM_SEND_REQUEST,
+	PE_PRS_FRS_SHARED, /* pe-st0 */
+	PE_VDM_SEND_REQUEST, /* pe-st1 */
 
 	/* Normal States */
-	PE_SRC_STARTUP,
-	PE_SRC_DISCOVERY,
-	PE_SRC_SEND_CAPABILITIES,
-	PE_SRC_NEGOTIATE_CAPABILITY,
-	PE_SRC_TRANSITION_SUPPLY,
-	PE_SRC_READY,
-	PE_SRC_DISABLED,
-	PE_SRC_CAPABILITY_RESPONSE,
-	PE_SRC_HARD_RESET,
-	PE_SRC_HARD_RESET_RECEIVED,
-	PE_SRC_TRANSITION_TO_DEFAULT,
-	PE_SNK_STARTUP,
-	PE_SNK_DISCOVERY,
-	PE_SNK_WAIT_FOR_CAPABILITIES,
-	PE_SNK_EVALUATE_CAPABILITY,
-	PE_SNK_SELECT_CAPABILITY,
-	PE_SNK_READY,
-	PE_SNK_HARD_RESET,
-	PE_SNK_TRANSITION_TO_DEFAULT,
-	PE_SNK_GIVE_SINK_CAP,
-	PE_SNK_GET_SOURCE_CAP,
-	PE_SNK_TRANSITION_SINK,
-	PE_SEND_SOFT_RESET,
-	PE_SOFT_RESET,
-	PE_SEND_NOT_SUPPORTED,
-	PE_SRC_PING,
-	PE_DRS_EVALUATE_SWAP,
-	PE_DRS_CHANGE,
-	PE_DRS_SEND_SWAP,
-	PE_PRS_SRC_SNK_EVALUATE_SWAP,
-	PE_PRS_SRC_SNK_TRANSITION_TO_OFF,
-	PE_PRS_SRC_SNK_ASSERT_RD,
-	PE_PRS_SRC_SNK_WAIT_SOURCE_ON,
-	PE_PRS_SRC_SNK_SEND_SWAP,
-	PE_PRS_SNK_SRC_EVALUATE_SWAP,
-	PE_PRS_SNK_SRC_TRANSITION_TO_OFF,
-	PE_PRS_SNK_SRC_ASSERT_RP,
-	PE_PRS_SNK_SRC_SOURCE_ON,
-	PE_PRS_SNK_SRC_SEND_SWAP,
-	PE_VCS_EVALUATE_SWAP,
-	PE_VCS_SEND_SWAP,
-	PE_VCS_WAIT_FOR_VCONN_SWAP,
-	PE_VCS_TURN_ON_VCONN_SWAP,
-	PE_VCS_TURN_OFF_VCONN_SWAP,
-	PE_VCS_SEND_PS_RDY_SWAP,
-	PE_VCS_CBL_SEND_SOFT_RESET,
-	PE_VDM_IDENTITY_REQUEST_CBL,
-	PE_INIT_PORT_VDM_IDENTITY_REQUEST,
-	PE_INIT_VDM_SVIDS_REQUEST,
-	PE_INIT_VDM_MODES_REQUEST,
-	PE_VDM_REQUEST_DPM,
-	PE_VDM_RESPONSE,
-	PE_WAIT_FOR_ERROR_RECOVERY,
-	PE_BIST_TX,
-	PE_DEU_SEND_ENTER_USB,
-	PE_DR_GET_SINK_CAP,
-	PE_DR_SNK_GIVE_SOURCE_CAP,
-	PE_DR_SRC_GET_SOURCE_CAP,
+	PE_SRC_STARTUP, /* pe-st2 */
+	PE_SRC_DISCOVERY, /* pe-st3 */
+	PE_SRC_SEND_CAPABILITIES, /* pe-st4 */
+	PE_SRC_NEGOTIATE_CAPABILITY, /* pe-st5 */
+	PE_SRC_TRANSITION_SUPPLY, /* pe-st6 */
+	PE_SRC_READY, /* pe-st7 */
+	PE_SRC_DISABLED, /* pe-st8 */
+	PE_SRC_CAPABILITY_RESPONSE, /* pe-st9 */
+	PE_SRC_HARD_RESET, /* pe-st10 */
+	PE_SRC_HARD_RESET_RECEIVED, /* pe-st11 */
+	PE_SRC_TRANSITION_TO_DEFAULT, /* pe-st12 */
+	PE_SNK_STARTUP, /* pe-st13 */
+	PE_SNK_DISCOVERY, /* pe-st14 */
+	PE_SNK_WAIT_FOR_CAPABILITIES, /* pe-st15 */
+	PE_SNK_EVALUATE_CAPABILITY, /* pe-st16 */
+	PE_SNK_SELECT_CAPABILITY, /* pe-st17 */
+	PE_SNK_READY, /* pe-st18 */
+	PE_SNK_HARD_RESET, /* pe-st19 */
+	PE_SNK_TRANSITION_TO_DEFAULT, /* pe-st20 */
+	PE_SNK_GIVE_SINK_CAP, /* pe-st21 */
+	PE_SNK_GET_SOURCE_CAP, /* pe-st22 */
+	PE_SNK_TRANSITION_SINK, /* pe-st23 */
+	PE_SEND_SOFT_RESET, /* pe-st24 */
+	PE_SOFT_RESET, /* pe-st25 */
+	PE_SEND_NOT_SUPPORTED, /* pe-st26 */
+	PE_SRC_PING, /* pe-st27 */
+	PE_DRS_EVALUATE_SWAP, /* pe-st28 */
+	PE_DRS_CHANGE, /* pe-st29 */
+	PE_DRS_SEND_SWAP, /* pe-st30 */
+	PE_PRS_SRC_SNK_EVALUATE_SWAP, /* pe-st31 */
+	PE_PRS_SRC_SNK_TRANSITION_TO_OFF, /* pe-st32 */
+	PE_PRS_SRC_SNK_ASSERT_RD, /* pe-st33 */
+	PE_PRS_SRC_SNK_WAIT_SOURCE_ON, /* pe-st34 */
+	PE_PRS_SRC_SNK_SEND_SWAP, /* pe-st35 */
+	PE_PRS_SNK_SRC_EVALUATE_SWAP, /* pe-st36 */
+	PE_PRS_SNK_SRC_TRANSITION_TO_OFF, /* pe-st37 */
+	PE_PRS_SNK_SRC_ASSERT_RP, /* pe-st38 */
+	PE_PRS_SNK_SRC_SOURCE_ON, /* pe-st39 */
+	PE_PRS_SNK_SRC_SEND_SWAP, /* pe-st40 */
+	PE_VCS_EVALUATE_SWAP, /* pe-st41 */
+	PE_VCS_SEND_SWAP, /* pe-st42 */
+	PE_VCS_WAIT_FOR_VCONN_SWAP, /* pe-st43 */
+	PE_VCS_TURN_ON_VCONN_SWAP, /* pe-st44 */
+	PE_VCS_TURN_OFF_VCONN_SWAP, /* pe-st45 */
+	PE_VCS_SEND_PS_RDY_SWAP, /* pe-st46 */
+	PE_VCS_CBL_SEND_SOFT_RESET, /* pe-st47 */
+	PE_VDM_IDENTITY_REQUEST_CBL, /* pe-st48 */
+	PE_INIT_PORT_VDM_IDENTITY_REQUEST, /* pe-st49 */
+	PE_INIT_VDM_SVIDS_REQUEST, /* pe-st50 */
+	PE_INIT_VDM_MODES_REQUEST, /* pe-st51 */
+	PE_VDM_REQUEST_DPM, /* pe-st52 */
+	PE_VDM_RESPONSE, /* pe-st53 */
+	PE_WAIT_FOR_ERROR_RECOVERY, /* pe-st54 */
+	PE_BIST_TX, /* pe-st55 */
+	PE_DEU_SEND_ENTER_USB, /* pe-st56 */
+	PE_DR_GET_SINK_CAP, /* pe-st57 */
+	PE_DR_SNK_GIVE_SOURCE_CAP, /* pe-st58 */
+	PE_DR_SRC_GET_SOURCE_CAP, /* pe-st59 */
 
 	/* PD3.0 only states below here*/
 	/* UFP Data Reset States */
-	PE_UDR_SEND_DATA_RESET,
-	PE_UDR_DATA_RESET_RECEIVED,
-	PE_UDR_TURN_OFF_VCONN,
-	PE_UDR_SEND_PS_RDY,
-	PE_UDR_WAIT_FOR_DATA_RESET_COMPLETE,
+	PE_UDR_SEND_DATA_RESET, /* pe-st60 */
+	PE_UDR_DATA_RESET_RECEIVED, /* pe-st61 */
+	PE_UDR_TURN_OFF_VCONN, /* pe-st62 */
+	PE_UDR_SEND_PS_RDY, /* pe-st63 */
+	PE_UDR_WAIT_FOR_DATA_RESET_COMPLETE, /* pe-st64 */
 	/* DFP Data Reset States */
-	PE_DDR_SEND_DATA_RESET,
-	PE_DDR_DATA_RESET_RECEIVED,
-	PE_DDR_WAIT_FOR_VCONN_OFF,
-	PE_DDR_PERFORM_DATA_RESET,
-	PE_FRS_SNK_SRC_START_AMS,
-	PE_GIVE_BATTERY_CAP,
-	PE_GIVE_BATTERY_STATUS,
-	PE_GIVE_STATUS,
-	PE_SEND_ALERT,
-	PE_ALERT_RECEIVED,
-	PE_SRC_CHUNK_RECEIVED,
-	PE_SNK_CHUNK_RECEIVED,
-	PE_VCS_FORCE_VCONN,
-	PE_GET_REVISION,
+	PE_DDR_SEND_DATA_RESET, /* pe-st65 */
+	PE_DDR_DATA_RESET_RECEIVED, /* pe-st66 */
+	PE_DDR_WAIT_FOR_VCONN_OFF, /* pe-st67 */
+	PE_DDR_PERFORM_DATA_RESET, /* pe-st68 */
+	PE_FRS_SNK_SRC_START_AMS, /* pe-st69 */
+	PE_GIVE_BATTERY_CAP, /* pe-st70 */
+	PE_GIVE_BATTERY_STATUS, /* pe-st71 */
+	PE_GIVE_STATUS, /* pe-st72 */
+	PE_SEND_ALERT, /* pe-st73 */
+	PE_ALERT_RECEIVED, /* pe-st74 */
+	PE_SRC_CHUNK_RECEIVED, /* pe-st75 */
+	PE_SNK_CHUNK_RECEIVED, /* pe-st76 */
+	PE_VCS_FORCE_VCONN, /* pe-st77 */
+	PE_GET_REVISION, /* pe-st78 */
 };
 
 /*