On 08/04/2020 14:55, Andi Shyti wrote:
Hi Tvrtko,
I start by saying that this patch was mainly sent to kickstart a
discussion about cleanups required in debugfs and how debugfs can
be inconsistent and how much it looks to me that we are relying
on its current state.
The i915_sseu_status is broken and the tests on this interface
are disabled. There is no reason to drag it along.
Not saying we need it, but can you say how it is broken?
well tests in igt are failing because we don't get the results we
expect, I don't know where it is actually broken but the igt test
looks straight forward to me.
I assume (with some hints I received, though) that the sseu
reads are inconsistent.
Andi
I think it's broken because we're reading an acknowledgement registers.
These registers seems to be populated only after a context is run.
If you read it before a context is run after coming out of power
management, there is no request to acknowledge and you get 0 values.
-Lionel
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