diff options
| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2018-04-12 17:58:02 +0300 |
|---|---|---|
| committer | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2018-04-13 10:11:17 +0300 |
| commit | 61bf9719fa170cd73b1937770d08cb062e070958 (patch) | |
| tree | 235e22f8a09a1911e90fbfa63669c058f2eada37 /drivers/gpu/drm/i915/intel_engine_cs.c | |
| parent | e53a1058395435b8801591361b2be18adda869ff (diff) | |
| download | linux-61bf9719fa170cd73b1937770d08cb062e070958.tar.xz | |
drm/i915/cnl: Use mmio access to context status buffer
Evidence indicates that Cannonlake HWSP is not coherent
as it should. Revert to using mmio access for now.
Testcase: igt/gem_ctx_switch
References: https://bugs.freedesktop.org/show_bug.cgi?id=105888
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Rafael Antognolli <rafael.antognolli@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180412145802.23313-1-mika.kuoppala@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_engine_cs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_engine_cs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index 68898d58dd1e..1a8370779bbb 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -475,6 +475,9 @@ static bool csb_force_mmio(struct drm_i915_private *i915) if (intel_vgpu_active(i915) && !intel_vgpu_has_hwsp_emulation(i915)) return true; + if (IS_CANNONLAKE(i915)) + return true; + return false; } |