[Intel-gfx] ✗ Ro.CI.BAT: failure for drm/i915: DP branch devices (rev7)

[Patchwork]

== Series Details ==

Series: drm/i915: DP branch devices (rev7)
URL   : https://patchwork.freedesktop.org/series/6658/
State : failure

== Summary ==

Applying: drm: Read DP branch device HW revision
fatal: sha1 information is lacking or useless (drivers/gpu/drm/drm_dp_helper.c).
error: could not build fake ancestor
Patch failed at 0001 drm: Read DP branch device HW revision
The copy of the patch that failed is found in: .git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".