Re: [PATCH] Revert "i965: Always use Y-tiled buffers on SKL+"

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Hi,

On 9 May 2016 at 08:05, Daniel Vetter <daniel@xxxxxxxx> wrote:
> On Mon, May 02, 2016 at 11:38:15AM -0700, Kenneth Graunke wrote:
>> On Monday, May 2, 2016 3:40:14 PM PDT Daniel Stone wrote:
>> > This commit broke Weston/KMS, and presumably also xf86-video-modesetting.
>>
>> For me, xf86-video-modesetting, and xf86-video-intel/SNA+DRI3 both work
>> fine with Y-tiling enabled.  However, it does break UXA+DRI3.
>>
>> I'm curious why xf86-video-modesetting would continue to work, while
>> Weston/KMS broke...it sounds like modesetting shouldn't work either...
>
> I think -modesetting should keep working as long as you copy from the
> client buffer's to the screen. For frontbuffer flipping it /should/ blow
> up I think too.

The screen buffer is allocated by GBM (when using Glamor for
acceleration), which as of this update would be Y-tiled as well. So,
doesn't really help at all.

Cheers,
Daniel
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