drm/i915/icl: Store available engine masks in INTEL_INFO

Upcoming GuC code will need to read the fused off engine masks as well,
and will also want to have them as enabled instead of disabled masks.

To consolidate the read-out place we can store them in this fashion inside
INTEL_INFO so they can be easily referenced in the future.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181018104106.30147-1-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/intel_device_info.c

@@ -880,40 +880,37 @@ void intel_driver_caps_print(const struct intel_driver_caps *caps,
 void intel_device_info_init_mmio(struct drm_i915_private *dev_priv)
 {
 	struct intel_device_info *info = mkwrite_device_info(dev_priv);
-	u8 vdbox_disable, vebox_disable;
 	u32 media_fuse;
-	int i;
+	unsigned int i;
 
 	if (INTEL_GEN(dev_priv) < 11)
 		return;
 
-	media_fuse = I915_READ(GEN11_GT_VEBOX_VDBOX_DISABLE);
+	media_fuse = ~I915_READ(GEN11_GT_VEBOX_VDBOX_DISABLE);
 
-	vdbox_disable = media_fuse & GEN11_GT_VDBOX_DISABLE_MASK;
-	vebox_disable = (media_fuse & GEN11_GT_VEBOX_DISABLE_MASK) >>
-			GEN11_GT_VEBOX_DISABLE_SHIFT;
+	info->vdbox_enable = media_fuse & GEN11_GT_VDBOX_DISABLE_MASK;
+	info->vebox_enable = (media_fuse & GEN11_GT_VEBOX_DISABLE_MASK) >>
+			     GEN11_GT_VEBOX_DISABLE_SHIFT;
 
-	DRM_DEBUG_DRIVER("vdbox disable: %04x\n", vdbox_disable);
+	DRM_DEBUG_DRIVER("vdbox enable: %04x\n", info->vdbox_enable);
 	for (i = 0; i < I915_MAX_VCS; i++) {
 		if (!HAS_ENGINE(dev_priv, _VCS(i)))
 			continue;
 
-		if (!(BIT(i) & vdbox_disable))
-			continue;
-
-		info->ring_mask &= ~ENGINE_MASK(_VCS(i));
-		DRM_DEBUG_DRIVER("vcs%u fused off\n", i);
+		if (!(BIT(i) & info->vdbox_enable)) {
+			info->ring_mask &= ~ENGINE_MASK(_VCS(i));
+			DRM_DEBUG_DRIVER("vcs%u fused off\n", i);
+		}
 	}
 
-	DRM_DEBUG_DRIVER("vebox disable: %04x\n", vebox_disable);
+	DRM_DEBUG_DRIVER("vebox enable: %04x\n", info->vebox_enable);
 	for (i = 0; i < I915_MAX_VECS; i++) {
 		if (!HAS_ENGINE(dev_priv, _VECS(i)))
 			continue;
 
-		if (!(BIT(i) & vebox_disable))
-			continue;
-
-		info->ring_mask &= ~ENGINE_MASK(_VECS(i));
-		DRM_DEBUG_DRIVER("vecs%u fused off\n", i);
+		if (!(BIT(i) & info->vebox_enable)) {
+			info->ring_mask &= ~ENGINE_MASK(_VECS(i));
+			DRM_DEBUG_DRIVER("vecs%u fused off\n", i);
+		}
 	}
 }

drivers/gpu/drm/i915/intel_device_info.h

@@ -185,6 +185,10 @@ struct intel_device_info {
 
 	u32 cs_timestamp_frequency_khz;
 
+	/* Enabled (not fused off) media engine bitmasks. */
+	u8 vdbox_enable;
+	u8 vebox_enable;
+
 	struct color_luts {
 		u16 degamma_lut_size;
 		u16 gamma_lut_size;