[Bug 99353] Kaveri 7400K shows random colored noise instead of GUI in X or Wayland

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99353

--- Comment #43 from Bong Cosca <bong.cosca at gmail.com> ---
Created attachment 137682
  --> https://bugs.freedesktop.org/attachment.cgi?id=137682&action=edit
radeonsi: force si_write_harvested_raster_configs when we fail to determine
enabled backends

Attached patch is less radical than the previous proposal.

Prevent screen corruption by forcing si_write_harvested_raster_configs() when
we fail to determine enabled backends so rb0/rb1 masks and raster_config_se are
computed correctly for cards with one rb_per_se.

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