Revert "drm/i915/cnl: Use mmio access to context status buffer"

In the previous patch (to include a rmb() after readig the CSB WRITE
pointer from the HWSP) we believe we have fixed the underlying bug, and
so can re-enable using the HWSP on Cannolake.

This reverts commit 61bf9719fa17 ("drm/i915/cnl: Use mmio access to
context status buffer").

References: https://bugs.freedesktop.org/show_bug.cgi?id=105888
References: https://bugs.freedesktop.org/show_bug.cgi?id=106185
References: 61bf9719fa17 ("drm/i915/cnl: Use mmio access to context status buffer")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Mika Kuoppala <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Cc: Michał Winiarski <[email protected]>
Cc: Rafael Antognolli <[email protected]>
Cc: Michel Thierry <[email protected]>
Cc: Timo Aaltonen <[email protected]>
Tested-by: Timo Aaltonen <[email protected]>
Acked-by: Michel Thierry <[email protected]>
Acked-by: Mika Kuoppala <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions