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

From	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Newsgroups	linux.kernel
Subject	Re: [Intel-gfx] [PATCH v2 2/4] drm/i915/skl: Only flush pipes when we change the ddb allocation
Date	2016-07-25 09:40 +0200
Message-ID	<rYIEx-1Lh-13@gated-at.bofh.it> (permalink)
References	<rXrPs-3ny-9@gated-at.bofh.it> <rXrPs-3ny-7@gated-at.bofh.it>
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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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[PATCH v2 2/4] drm/i915/skl: Only flush pipes when we change the ddb allocation Lyude <cpaul@redhat.com> - 2016-07-21 21:30 +0200
  Re: [PATCH v2 2/4] drm/i915/skl: Only flush pipes when we change  the ddb allocation Matt Roper <matthew.d.roper@intel.com> - 2016-07-21 22:50 +0200
  Re: [Intel-gfx] [PATCH v2 2/4] drm/i915/skl: Only flush pipes when we  change the ddb allocation Maarten Lankhorst <maarten.lankhorst@linux.intel.com> - 2016-07-25 09:40 +0200

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