From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Anholt <eric@anholt.net>
Subject: Re: [PATCH] Add RGBA64 texture cpp for vc4 driver.
Date: Thu, 01 Nov 2018 13:10:55 -0700
Message-ID: <87y3ac7e40.fsf@anholt.net>
References: <20181101044227.5517-1-nick.kreeger@gmail.com>
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Nick Kreeger <nick.kreeger@gmail.com> writes:

> This patch is needed to help implement half-float texturing and
> rendering for the vc4 driver in mesa. This small patch introduces the
> cpp value for the RGBA64 texture. A future patch will include updates to
> vc4_render_cl.c to handle HDR color stores.

We'll need a GET_PARAM ioctl param to say "we support RGBA64 textures"
and use that from vc4_screen.c's format checking, otherwise new Mesa on
old kernels will try to expose RGBA64 textures and fail at rendering
time.  If we're introducing a GET_PARAM, we probably want to just do
half float rendering and texturing at the same time.

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