From: raof@ubuntu.com
To: dri-devel@lists.freedesktop.org
Subject: [PATCH] Tell userspace if scanning out of an imported PRIME buffer is safe.
Date: Tue, 4 Apr 2017 18:13:19 +1000 [thread overview]
Message-ID: <20170404081321.19263-1-raof@ubuntu.com> (raw)
My past set of patches fix nouveau, radeon, and amdgpu breaking dma-buf sharing when
trying to scanout of an imported PRIME buffer. Driver-agnostic userspace can't safely
try to scanout of such a buffer, though, because the failure-mode is that subsequent
rendering isn't shown on screen.
This adds a DRM_CAP_PRIME_SCANOUT for userspace to detect when it's safe and sensible
to try and scanout of an imported PRIME buffer.
I know that i915 can do this, and nouveau/radeon/amdgpu can't (at the moment).
I do not know which other drivers might be able to support the DRIVER_PRIME_SCANOUT
feature. Suggestions welcome!
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next reply other threads:[~2017-04-04 8:13 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-04 8:13 raof [this message]
2017-04-04 8:13 ` [PATCH 1/2] drm: Add DRM_CAP_PRIME_SCANOUT raof
2017-04-04 8:31 ` Daniel Vetter
2017-04-04 10:11 ` Daniel Stone
2017-04-04 10:27 ` Christopher James Halse Rogers
2017-04-04 10:43 ` Lucas Stach
2017-04-04 11:53 ` Daniel Vetter
2017-04-05 0:20 ` Christopher James Halse Rogers
2017-04-05 6:27 ` Daniel Vetter
2017-04-05 6:52 ` Christopher James Halse Rogers
2017-04-05 8:15 ` Lucas Stach
2017-04-05 9:59 ` Daniel Vetter
2017-04-05 10:14 ` Lucas Stach
2017-04-05 11:13 ` Christopher James Halse Rogers
2017-04-05 11:21 ` Christian König
2017-04-10 8:52 ` Michel Dänzer
2017-04-10 9:03 ` Christian König
2017-04-10 14:10 ` Alex Deucher
2017-04-06 7:47 ` Christopher James Halse Rogers
2017-04-10 8:51 ` Michel Dänzer
2017-04-17 5:05 ` Christopher James Halse Rogers
2017-04-17 6:41 ` Michel Dänzer
2017-04-04 10:43 ` Daniel Stone
2017-04-04 11:15 ` Christian König
2017-04-04 11:32 ` Daniel Stone
2017-04-04 11:43 ` Christian König
2017-04-04 8:13 ` [PATCH 2/2] drm/i915: support DRIVER_PRIME_SCANOUT raof
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