On 28/02/2020 12:52, Chris Wilson wrote:
Quoting Chris Wilson (2020-02-27 17:04:42)
Quoting Lionel Landwerlin (2020-02-27 12:43:56)
We still need to wait for the initial OA configuration to happen
before we enable OA report writes to the OA buffer.
I can confirm this fixes the hang Lionel reported on Skylake [still odd
that we can only get this to be an issue on skl]. However, Lionel
mentioned that we should be more careful and ensure the emit_oa_config()
request is scheduled last. We're currently looking at different ways we
can do that.
Fwiw, this patch works and fixes the problem. I prefer not adding
a single use temporary to i915_perf_stream, but I leave that choice to
Lionel.
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
-Chris
Thanks Chris!
-Lionel
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