linux-kernel - Re: [PATCH 3/3] drm/vc4: Add support for dma-buf fencing.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <87wpap7cow.fsf@eliezer.anholt.net>
Date:   Wed, 12 Apr 2017 10:33:51 -0700
From:   Eric Anholt <eric@...olt.net>
To:     Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Gustavo Padovan <gustavo.padovan@...labora.com>
Subject: Re: [PATCH 3/3] drm/vc4: Add support for dma-buf fencing.

Daniel Vetter <daniel@...ll.ch> writes:

> On Mon, Apr 10, 2017 at 06:44:14PM -0700, Eric Anholt wrote:
>> This is needed for proper synchronization with display on another DRM
>> device (pl111 or tinydrm) with buffers produced by vc4 V3D.  Fixes the
>> new igt vc4_dmabuf_poll testcase, and rendering of one of the glmark2
>> desktop tests on pl111+vc4.
>> 
>> This doesn't yet introduce waits on other device's fences before vc4's
>> rendering/display, because I don't have testcases for them.
>> 
>> Signed-off-by: Eric Anholt <eric@...olt.net>
>> Cc: Gustavo Padovan <gustavo.padovan@...labora.com>
>
> So not sure I didn't look hard enough or why exactly, but I didn't find
> anything like ->prepare_fb as implemented in e.g. drm_fb_cma_prepare_fb().
> Where is that? Otherwise looks good to me.

Yeah, I need to sort that out for vc4 as a consumer of busy buffers
still.  This patch just does vc4 as the producer.

Download attachment "signature.asc" of type "application/pgp-signature" (833 bytes)