SQL Server - Cumulate awake time for devices from event summary - sql-server

Question

I'm working on a SQL server (used by BMC) to grab the uptime of some devices.
I've got a query that display me results like this:
| DeviceName | EventDate | EventType |
| ---------- | ----------------------- | ---------- |
| 1 | 2021-02-15 08:06:12.000 | getting up |
| 1 | 2021-02-12 15:07:26.000 | going down |
| 2 | 2021-02-16 08:12:54.000 | getting up |
| 2 | 2021-02-12 15:43:00.000 | going down |
| 3 | 2021-02-15 07:47:42.000 | getting up |
| 3 | 2021-02-12 15:38:41.000 | going down |
| 4 | 2021-02-15 08:10:07.000 | getting up |
| 5 | 2021-02-18 06:41:40.000 | getting up |
| ... | ... | ... |
I would like to get a result that looks like that:
| DeviceName | TotalUpTime (min) |
| ---------- | ----------------- |
| 1 | 16543 |
| 2 | 13639 |
| 3 | 13524 |
| 4 | 19235 |
| 5 | 12347 |
Here is my current query:
SELECT
DeviceName,
EventDate,
EventType
FROM **irrelevant complexe SELECT query**
ORDER BY DeviceName, EventDate DESC
Any help would be great!!
Many thx in advance!

Answer 1

SOLUTION:
Ok, here's what worked for me:
SELECT
DeviceName,
DATEDIFF(s, EventDate, EndTime)/60 AS [TotalUpTime (min)]
FROM (
SELECT *,
LEAD(CASE WHEN EventType = 32 THEN EventDate END, 1, GETDATE())
OVER (PARTITION BY DeviceName ORDER BY EventDate) AS EndTime
FROM (
**Irrelevant SELECT query**
) r
) s
WHERE EventType = 16 AND EndTime IS NOT NULL
Many thanks to #Charlieface whos response helped me a lot.
Hope this help someone someday, even if it's very specific.

Answer 2

SELECT
DeviceName,
SUM(DATEDIFF(ms, EventDate, EndTime) / 60000.0) AS [TotalUpTime (min)]
FROM (
SELECT *,
LEAD(CASE WHEN EventType = 'going down' THEN EventDate END, 1, GETDATE()) OVER
OVER (PARTITION BY DeviceName ORDER BY EventDate) AS EndTime
FROM table
)
WHERE EventType = 'getting up' AND EndTime IS NOT NULL
GROUP BY DeviceName