[Intel-gfx] [PATCH 55/62] [v2] drm/i915/bdw: Disable semaphores

[Ben Widawsky]

From: Ben Widawsky <ben at bwidawsk.net>

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.

Cc: Jesse Barnes <jbarnes at virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_drv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index e0a061b..45981c5 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -478,6 +478,13 @@ 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);
+		DRM_INFO("Semaphores disabled GEN8\n");
+		return 0;
+	}
+
 	if (i915_semaphores >= 0)
 		return i915_semaphores;
 
-- 
1.8.4.2