drm/i915: Fix IVB GT2 WaDisableDopClockGating and WaDisablePSDDualDispatchEnable

IVB GT2 has two registers for these things, and both must be written.

To add a bit more confusion both Bspec and the W/A database state that
WaDisablePSDDualDispatchEnable is only needed for IVB GT1, but the W/A
database also says to write even the second GT2 only register. So I
don't really know what the right thing here is.

Note that Bspec disagrees with the w/a database here, but Ville
confirmed (by asking Chris) that on gt1 the 2nd reg doesn't exist.

Signed-off-by: Ville Syrjälä <[email protected]>
Reviewed-by: Rodrigo Vivi <[email protected]>
[danvet: Add note as requested by Rodrigo.]
Signed-off-by: Daniel Vetter <[email protected]>

0 files changed, 0 insertions, 0 deletions