From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: ML mesa-dev <mesa-dev@lists.freedesktop.org>,
Rob Herring <robh+dt@kernel.org>,
Steven Price <steven.price@arm.com>,
dri-devel <dri-devel@lists.freedesktop.org>,
Boris Brezillon <boris.brezillon@collabora.com>
Subject: Re: [RFC PATCH] mesa: Export BOs in RW mode
Date: Wed, 3 Jul 2019 09:07:29 -0700 [thread overview]
Message-ID: <20190703160729.GA3948@kevin> (raw)
In-Reply-To: <20190703154724.GJ15868@phenom.ffwll.local>
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> Since the same discussion is happening with etnaviv: Why exactly does mesa
> need to mmap imported buffers?
The golden question!
Seemingly, (one of the) reasons is that the state tracker does
colourspace conversion in software if the winsys wants a format that the
driver doesn't advertise. Unrelated to this, that's almost certainly a
performance issue and might explain quite a bit...
In this case, the winsys seems to want RGB10_A2 but we settle for RGBA8.
I thought that was just changing EGL negotiation stuff.. I had no idea
it was covering up in software... not good...
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prev parent reply other threads:[~2019-07-03 16:07 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-03 13:33 [RFC PATCH] mesa: Export BOs in RW mode Boris Brezillon
2019-07-03 13:45 ` Rob Herring
2019-07-03 13:56 ` Boris Brezillon
2019-07-03 14:13 ` Steven Price
2019-07-03 14:33 ` Boris Brezillon
2019-07-03 14:50 ` Steven Price
2019-07-03 15:07 ` Boris Brezillon
2019-07-03 16:18 ` Daniel Vetter
2019-07-04 9:26 ` Steven Price
2019-07-04 9:46 ` [Mesa-dev] " Daniel Vetter
2019-07-04 16:37 ` [PATCH] dma-buf: Update docs to discourage use of dma_buf_mmap() Steven Price
2019-07-03 15:59 ` [RFC PATCH] mesa: Export BOs in RW mode Rob Herring
2019-07-03 16:15 ` Steven Price
2019-07-03 15:47 ` Daniel Vetter
2019-07-03 15:49 ` Daniel Vetter
2019-07-03 16:07 ` Alyssa Rosenzweig [this message]
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