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drm/radeon: work around a hw bug in MGCG on CIK
authorAlex Deucher <alexander.deucher@amd.com>
Mon, 17 Nov 2014 20:08:17 +0000 (15:08 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 20 Nov 2014 16:11:43 +0000 (11:11 -0500)
Always need to set bit 0 of RLC_CGTT_MGCG_OVERRIDE
to avoid unreliable doorbell updates in some cases.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

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