[PATCH weston v12 00/40] Atomic modesetting

Daniel Stone daniel at fooishbar.org
Thu Oct 12 11:56:39 UTC 2017

Hi Emre,

On 12 October 2017 at 10:20, Ucan, Emre (ADITG/ESB)
<eucan at de.adit-jv.com> wrote:
> I tested your branch " wip/2017-09/atomic-v12" on Intel Apollo Lake with:
> - Linux Kernel v4.9
> - Libdrm 2.4.83
> - Mesa 13.0.6

Thanks for testing!

> In the end, I could not test the atomic modesetting with this setup. I got this warning "DRM: does not support atomic modesetting".
> When I checked the source code, I saw that atomic modesetting depends on DRM_CAP_CRTC_IN_VBLANK_EVENT, which is introduced to the kernel with this commit "5db06a8a98f515f67446a69c57577c4c363ec65d" in 4.12 Linux kernel.

Yep; it should be quite a simple backport.

> I also saw a regression. After desktop-shell sets the display black, weston crashed with this callstack:
> Oct 04 02:25:39 gr-mrb-64 weston[1922]: weston: ../../../../../../../../weston/libweston/compositor.c:2474: weston_output_finish_frame: Assertion `output->repaint_status == REPAINT_AWAITING_COMPLETION' fa
> iled.

This is already fixed. :) My current WIP branch and status is
available here: https://phabricator.freedesktop.org/T7595

There are still some issues with DPMS, but I think we have quite a
good workaround now.


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