[PATCH v3 02/23] drm/i915/guc: Don't allow GuC submission

[Michal Wajdeczko]

Due to the upcoming changes to the GuC ABI interface, we must
disable GuC submission mode until final ABI will be available
on all GuC firmwares.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: John Spotswood <john.a.spotswood at intel.com>
Cc: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
Cc: Tony Ye <tony.ye at intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Cc: Jeff Mcgee <jeff.mcgee at intel.com>
Cc: Antonio Argenziano <antonio.argenziano at intel.com>
Cc: Sujaritha Sundaresan <sujaritha.sundaresan at intel.com>
---
 drivers/gpu/drm/i915/intel_uc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 2a56e2363888..21310b917ccc 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -130,6 +130,13 @@ static void sanitize_options_early(struct drm_i915_private *i915)
 					  "no HuC firmware");
 	}
 
+	/* XXX: Verify GuC submission support */
+	if (intel_uc_is_using_guc_submission(i915)) {
+		DRM_WARN("Incompatible option detected: %s=%d, %s!\n",
+			 "enable_guc", i915_modparams.enable_guc,
+			 "submission not supported");
+	}
+
 	/* A negative value means "use platform/config default" */
 	if (i915_modparams.guc_log_level < 0)
 		i915_modparams.guc_log_level =
@@ -286,6 +293,10 @@ int intel_uc_init(struct drm_i915_private *i915)
 	if (!HAS_GUC(i915))
 		return -ENODEV;
 
+	/* XXX: GuC submission is unavailable for now */
+	if (USES_GUC_SUBMISSION(i915))
+		return -EIO;
+
 	ret = intel_guc_init(guc);
 	if (ret)
 		return ret;
-- 
2.19.2