[Mesa-dev] VC4 not working for me with mesa 17.3.7 - was [meta-raspberrypi] VC4 not working for me with mesa 17.3.7

[Andreas Müller]

On Mon, Apr 2, 2018 at 2:42 PM, Daniel Stone <daniel at fooishbar.org> wrote:
> Hi Andreas,
>
> On 31 March 2018 at 15:18, Andreas Müller <schnitzeltony at gmail.com> wrote:
>> Thanks for prompt an VERY helpful support. I did:
>>
>> * Check my configure and found: --disable-dri3!
>> * Tested your patch (with --disable-dri3) and as expected it fixes the issue
>> * Found what causes --disable-dri3 - it came in by the Openembedded
>> update mentioned in first email. FWIW: I use a fork for
>> meta-raspberrypi - the original is not affected so I am the only one
>> with this issue...
>
> Glad to hear it!
>
>> I have two questions related to dri2/your patch (sorry asking for more :)
>>
>> 1. Your patch fixes improper initialized variable. Do you think it is
>> worth being applied?
>
> Yes, definitely: I've sent it in now. It's sadly missed 17.3.8
> (scheduled to be released about an hour ago), but hopefully we can get
> it in for a 17.3.9, if we have one. Else it'll be in 18.0.1.
>
>> 2. In the thread I mentioned in my first email Trevor mentioned that
>> he has seen error message 'Modifier 0x0 vs. tiling(0x7000000000000001)
>> mismatch' when trying to get chromium GLES accelerated. Maybe a stupid
>> question but is it possible that applications running at X can ask for
>> dri2 explicitly?
>
> He said that only happened when using the system (rather than bundled)
> libraries, which would presumably be using DRI2 by default. I've
> submitted a bug to OE to ask them to enable DRI3 by default, but in
> the meantime this Mesa fix should hopefully work anyway.
Thanks - I was thinking same. OE-Core enables DRI3 for x11 AND vulcan
only - and vulcan is not in my distro features (and does not make much
sense for VC4)

Added yocto mailing list to merge both threads together and avoid cross-tak.

Thanks again for taking care

Andreas