drm/i915/mtl: pass the GSC CS info to the GuC

We need to tell the GuC that the GSC CS is there.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221102171047.2787951-3-daniele.ceraolospurio@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c

@@ -488,6 +488,11 @@ static void fill_engine_enable_masks(struct intel_gt *gt,
 	info_map_write(info_map, engine_enabled_masks[GUC_BLITTER_CLASS], BCS_MASK(gt));
 	info_map_write(info_map, engine_enabled_masks[GUC_VIDEO_CLASS], VDBOX_MASK(gt));
 	info_map_write(info_map, engine_enabled_masks[GUC_VIDEOENHANCE_CLASS], VEBOX_MASK(gt));
+
+	/* The GSC engine is an instance (6) of OTHER_CLASS */
+	if (gt->engine[GSC0])
+		info_map_write(info_map, engine_enabled_masks[GUC_GSC_OTHER_CLASS],
+			       BIT(gt->engine[GSC0]->instance));
 }
 
 #define LR_HW_CONTEXT_SIZE (80 * sizeof(u32))
@@ -529,9 +534,6 @@ static int guc_prep_golden_context(struct intel_guc *guc)
 	}
 
 	for (engine_class = 0; engine_class <= MAX_ENGINE_CLASS; ++engine_class) {
-		if (engine_class == OTHER_CLASS)
-			continue;
-
 		guc_class = engine_class_to_guc_class(engine_class);
 
 		if (!info_map_read(&info_map, engine_enabled_masks[guc_class]))
@@ -609,9 +611,6 @@ static void guc_init_golden_context(struct intel_guc *guc)
 	addr_ggtt = intel_guc_ggtt_offset(guc, guc->ads_vma) + offset;
 
 	for (engine_class = 0; engine_class <= MAX_ENGINE_CLASS; ++engine_class) {
-		if (engine_class == OTHER_CLASS)
-			continue;
-
 		guc_class = engine_class_to_guc_class(engine_class);
 		if (!ads_blob_read(guc, system_info.engine_enabled_masks[guc_class]))
 			continue;

drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h

@@ -47,7 +47,8 @@
 #define GUC_VIDEOENHANCE_CLASS		2
 #define GUC_BLITTER_CLASS		3
 #define GUC_COMPUTE_CLASS		4
-#define GUC_LAST_ENGINE_CLASS		GUC_COMPUTE_CLASS
+#define GUC_GSC_OTHER_CLASS		5
+#define GUC_LAST_ENGINE_CLASS		GUC_GSC_OTHER_CLASS
 #define GUC_MAX_ENGINE_CLASSES		16
 #define GUC_MAX_INSTANCES_PER_CLASS	32
 
@@ -169,6 +170,7 @@ static u8 engine_class_guc_class_map[] = {
 	[COPY_ENGINE_CLASS]       = GUC_BLITTER_CLASS,
 	[VIDEO_DECODE_CLASS]      = GUC_VIDEO_CLASS,
 	[VIDEO_ENHANCEMENT_CLASS] = GUC_VIDEOENHANCE_CLASS,
+	[OTHER_CLASS]             = GUC_GSC_OTHER_CLASS,
 	[COMPUTE_CLASS]           = GUC_COMPUTE_CLASS,
 };
 
@@ -178,12 +180,13 @@ static u8 guc_class_engine_class_map[] = {
 	[GUC_VIDEO_CLASS]        = VIDEO_DECODE_CLASS,
 	[GUC_VIDEOENHANCE_CLASS] = VIDEO_ENHANCEMENT_CLASS,
 	[GUC_COMPUTE_CLASS]      = COMPUTE_CLASS,
+	[GUC_GSC_OTHER_CLASS]    = OTHER_CLASS,
 };
 
 static inline u8 engine_class_to_guc_class(u8 class)
 {
 	BUILD_BUG_ON(ARRAY_SIZE(engine_class_guc_class_map) != MAX_ENGINE_CLASS + 1);
-	GEM_BUG_ON(class > MAX_ENGINE_CLASS || class == OTHER_CLASS);
+	GEM_BUG_ON(class > MAX_ENGINE_CLASS);
 
 	return engine_class_guc_class_map[class];
 }