[Bug 110886] After S3 resume, kernel: [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:57:crtc-0] flip_done timed out

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110886

--- Comment #12 from Kai-Heng Feng <kai.heng.feng at canonical.com> ---
> Now it always shows PSP fail.
I've dug up more info about this issue. It always times out in
psp_cmd_submit_buf(). Particularly, this code section:

        while (*((unsigned int *)psp->fence_buf) != index) {
                if (--timeout == 0)
                        break;
                msleep(1);
        }

psp->fence_buf stuck at 406 and index stuck at 407 and it eventually times out.
This _always_ happens at 27th time of S3, and freeze the whole system at 28th
S3 attempt.

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