[PATCH xserver] modesetting: Fix page flipping under DRI 3.2.

[Mario Kleiner]

Will check it later when i'm at the machines. But does Ivybridge/Gen-7
even have CCS? I can't test with something more modern Intel atm.

-mario


On Tue, Apr 3, 2018 at 5:57 PM, Daniel Stone <daniel at fooishbar.org> wrote:
> On 3 April 2018 at 16:36, Mario Kleiner <mario.kleiner.de at gmail.com> wrote:
>> Btw. another new problem, which i haven't had time to track down at
>> all is that desktop composition under EGL seems to be totally broken.
>> Tested on KUbuntu 16.0.4 LTS with xserver master + mesa master last
>> thursday with whatever KDE Plasma 5 version ships with 16.04.
>> Compositing with XRender accel or GLX + OpenGL 2/3 works fine. Could
>> be modesetting, or glamor, or mesa.
>>
>> I get sometimes black screen, or sometimes massive corruption with
>> pixel trash like if it displays random buffer contents from
>> uninitialized buffers under modesetting-ddx + DRI3, on all kms
>> drivers. Can anybody confirm this?
>
> It is seeming like the compression support in the Intel driver has
> regressed. If you edit mesa/src/mesa/drivers/dri/i965/intel_screen.c
> and remove I915_FORMAT_MOD_Y_TILED_CCS from the supported_modifiers[]
> array, does that resolve the issue?
>
> Cheers,
> Daniel