[Intel-gfx] [PATCH v2 2/4] drm/i915/skl: Only flush pipes when we change the ddb allocation

Maarten Lankhorst maarten.lankhorst at linux.intel.com
Mon Jul 25 07:34:44 UTC 2016


Op 21-07-16 om 21:23 schreef Lyude:
> Manual pipe flushes are only necessary in order to make sure that we prevent
> pipes with changed ddb allocations from overlapping from one another at
> any point in time. Additionally, forcing us to wait for the next vblank
> every time we have to update the watermark values because the cursor was
> moving between screens will introduce a rather noticable lag for users.
This screams for a testcase in kms_cursor_legacy, when does this happen exactly?

I'm guessing it needs 2 screens, page flip on both and cursor update on both, one hiding the cursor other screen making it reappear..

~Maarten


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