[Mesa-dev] [PATCH 0/5] i965: ASTC5x5 workaround

[Rogovin, Kevin]

Hi,

 Yes ANV will need something like this as well. If the GPU samples from both an ASTC5x5 texture and one with an aux buffer without a texture cache invalidate between such accesses, then the GPU hangs, which in turn makes the system unresponsive for a few seconds until the kernel resets the GPU; then an ioctl will fail in i965 which means things are very bad usually and (for me atleast on my system with how I build mesa) the application crashes.

 -Kevin

-----Original Message-----
From: ibmirkin at gmail.com [mailto:ibmirkin at gmail.com] On Behalf Of Ilia Mirkin
Sent: Friday, December 1, 2017 7:38 PM
To: Rogovin, Kevin <kevin.rogovin at intel.com>
Cc: mesa-dev at lists.freedesktop.org
Subject: Re: [Mesa-dev] [PATCH 0/5] i965: ASTC5x5 workaround

On Fri, Dec 1, 2017 at 12:19 PM,  <kevin.rogovin at intel.com> wrote:
> From: Kevin Rogovin <kevin.rogovin at intel.com>
>
> This patch series implements a needed workaround for Gen9 for ASTC5x5 
> sampler reads. The crux of the work around is to make sure that the 
> sampler does not read an ASTC5x5 texture and a surface with an 
> auxilary buffer without having a texture cache invalidate between such accesses.

Presumably anv needs something like this too? What happens if you have a single draw which samples from both an ASTC5x5 texture and one with an aux buffer? [Just curious.]