Fugang Duan f2fb6b6275 net: stmmac: enable timestamp snapshot for required PTP packets in dwmac v5.10a
For rx filter 'HWTSTAMP_FILTER_PTP_V2_EVENT', it should be
PTP v2/802.AS1, any layer, any kind of event packet, but HW only
take timestamp snapshot for below PTP message: sync, Pdelay_req,
Pdelay_resp.

Then it causes below issue when test E2E case:
ptp4l[2479.534]: port 1: received DELAY_REQ without timestamp
ptp4l[2481.423]: port 1: received DELAY_REQ without timestamp
ptp4l[2481.758]: port 1: received DELAY_REQ without timestamp
ptp4l[2483.524]: port 1: received DELAY_REQ without timestamp
ptp4l[2484.233]: port 1: received DELAY_REQ without timestamp
ptp4l[2485.750]: port 1: received DELAY_REQ without timestamp
ptp4l[2486.888]: port 1: received DELAY_REQ without timestamp
ptp4l[2487.265]: port 1: received DELAY_REQ without timestamp
ptp4l[2487.316]: port 1: received DELAY_REQ without timestamp

Timestamp snapshot dependency on register bits in received path:
SNAPTYPSEL TSMSTRENA TSEVNTENA 	PTP_Messages
01         x         0          SYNC, Follow_Up, Delay_Req,
                                Delay_Resp, Pdelay_Req, Pdelay_Resp,
                                Pdelay_Resp_Follow_Up
01         0         1          SYNC, Pdelay_Req, Pdelay_Resp

For dwmac v5.10a, enabling all events by setting register
DWC_EQOS_TIME_STAMPING[SNAPTYPSEL] to 2’b01, clearing bit [TSEVNTENA]
to 0’b0, which can support all required events.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-26 16:27:41 -07:00
..
2020-03-23 07:59:38 +01:00
2020-05-22 11:10:42 -07:00
2020-04-10 11:32:22 +02:00
2020-05-22 20:06:25 +02:00
2020-04-27 13:28:27 -07:00
2020-04-04 18:07:59 -07:00
2020-04-16 13:52:31 -07:00
2020-03-30 11:43:51 -07:00
2020-03-19 23:04:32 -05:00
2020-04-03 15:05:35 -07:00
2020-04-03 14:25:02 -07:00
2020-04-08 21:03:40 -07:00
2020-03-31 10:05:01 -07:00
2020-04-23 09:28:15 -07:00
2020-04-17 06:05:29 -04:00
2020-04-07 19:48:52 -07:00
2020-04-21 14:21:20 +02:00
2020-04-02 15:50:04 -07:00
2020-04-03 15:05:35 -07:00
2020-05-21 12:59:29 -07:00
2020-04-07 20:24:34 -07:00
2020-03-19 07:41:03 +01:00
2020-04-17 10:35:17 -07:00
2020-04-03 13:12:26 -07:00
2020-04-08 10:51:53 -07:00
2020-04-08 10:51:53 -07:00