[PATCH 2/2] etnaviv: ASTC texture support

[Christian Gmeiner]

Am 01.11.2017 7:06 nachm. schrieb "Wladimir J. van der Laan" <
laanwj at gmail.com>:

On Wed, Nov 01, 2017 at 06:38:21PM +0100, Christian Gmeiner wrote:

> I would love to see a new format helper (util_format_is_astc(..) and not
> even start thinking about adding a new format bit (ASTC_FORMAT).

These formats are in a completely different space from the others, in the
hardware (programmed through a different register), so IMO it makes sense to
add a new format bit for it, just like for EXT_FORMAT.

Relying on mesa's judgement on whether something is astc seems brittle.


Sorry I do not share this option. Did you had a look at
https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/auxiliary/util/u_
format.csv ?

All astc formats are marked as those and why should we not trust mesa here?
Such helper could look like:  https://hastebin.com/jelisigife.m

Do we need ctx->specs.tex_astc at all? We could simply do it like this in
etnaviv_screen.c:

if (util_format_is_astc(format))
      supported = VIV_FEATURE(screen, chipMinorFeatures4, TEXTURE_ASTC);


I am still on travel but will share you tomorrow evening how I think this
should look like.

Greets
--
Christian
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