drm/i915/bdw: Disable semaphores

We've done insufficient testing on them thus far, so keep them disabled
until we do test.

v2: Use WARN when not enabling preliminary HW support as this should
only be disabled for that case.

v3: Rip out the now useless (and really noisy) DRM_INFO output.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a78e779..bbea429 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -478,6 +478,12 @@ bool i915_semaphore_is_enabled(struct drm_device *dev)
        if (INTEL_INFO(dev)->gen < 6)
                return 0;
 
+       /* Until we get further testing... */
+       if (IS_GEN8(dev)) {
+               WARN_ON(!i915_preliminary_hw_support);
+               return 0;
+       }
+
        if (i915_semaphores >= 0)
                return i915_semaphores;