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 <[email protected]> Cc: Rafael Antognolli <[email protected]> Cc: Rodrigo Vivi <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> --- drivers/gpu/drm/i915/intel_engine_cs.c | 3 +++ 1 file changed, 3 insertions(+) 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; } -- 2.14.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
