linux-kernel - Re: [PATCH 2/2] drm/vc4: Add get/set tiling ioctls.

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Message-ID: <CAPj87rP1OxFxNok8-yyTgdS75BSZz8kBTStfWuq0i0e6FTp41Q@mail.gmail.com>
Date:   Tue, 13 Jun 2017 09:38:13 +0100
From:   Daniel Stone <daniel@...ishbar.org>
To:     Eric Anholt <eric@...olt.net>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>
Subject: Re: [PATCH 2/2] drm/vc4: Add get/set tiling ioctls.

Hi Eric,

On 8 June 2017 at 01:13, Eric Anholt <eric@...olt.net> wrote:
> This allows mesa to set the tiling format for a BO and have that
> tiling format be respected by mesa on the other side of an
> import/export (and by vc4 scanout in the kernel), without defining a
> protocol to pass the tiling through userspace.

I posted a DRI3 v1.1 patch series which can advertise and also transit
modifiers directly under X11, and have also typed up the support for
Wayland which is working just fine with Weston from git. If you
implement DRIimage v15 to advertise and import modifiers, then you can
transit them for free without a magic-back-channel ioctl. Would that
be enough to convince you to drop this series?

Cheers,
Daniel