[PATCH 1/2] drm/i915/guc: Don't enable GuC/HuC in auto mode on pre-Gen11

[Michal Wajdeczko]

We are about to change default setting of "enable_guc" modparam
from 0(disabled) to -1(auto). As we only want to turn on
GuC/HuC on Gen11+, keep it off on older gens.

Note that it would be still possible to enable GuC/HuC on these
old platforms using explicit "enable_guc=2" modparam.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_uc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index fdf00f1ebb57..313ca34dfbe6 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -64,6 +64,10 @@ static int __get_platform_enable_guc(struct drm_i915_private *i915)
 
 	/* Any platform specific fine-tuning can be done here */
 
+	/* Don't enable GuC/HuC on pre-Gen11 */
+	if (INTEL_GEN(i915) < 11)
+		enable_guc = 0;
+
 	return enable_guc;
 }
 
-- 
2.19.2