drm/amd/display: Restructure DCN10 hubbub

[Why]
Change DCN10 hubbub to use hubbub as a base and allow all future DCN
hubbubs to do the same instead of using DCN10_hubbub. This increases
readability and doesn't require future hubbubs to inherit anything
other than the base hubbub struct.

[How]
Create separate DCN10_hubbub struct which uses the hubbub struct as
a base.
Signed-off-by: Eryk Brol <eryk.brol@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h

@@ -29,6 +29,9 @@
 #include "core_types.h"
 #include "dchubbub.h"
 
+#define TO_DCN10_HUBBUB(hubbub)\
+	container_of(hubbub, struct dcn10_hubbub, base)
+
 #define HUBHUB_REG_LIST_DCN()\
 	SR(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A),\
 	SR(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_A),\
@@ -165,10 +168,8 @@ struct dcn_hubbub_mask {
 
 struct dc;
 
-
-struct hubbub {
-	const struct hubbub_funcs *funcs;
-	struct dc_context *ctx;
+struct dcn10_hubbub {
+	struct hubbub base;
 	const struct dcn_hubbub_registers *regs;
 	const struct dcn_hubbub_shift *shifts;
 	const struct dcn_hubbub_mask *masks;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c

@@ -678,18 +678,18 @@ static struct mpc *dcn10_mpc_create(struct dc_context *ctx)
 
 static struct hubbub *dcn10_hubbub_create(struct dc_context *ctx)
 {
-	struct hubbub *hubbub = kzalloc(sizeof(struct hubbub),
+	struct dcn10_hubbub *dcn10_hubbub = kzalloc(sizeof(struct dcn10_hubbub),
 					  GFP_KERNEL);
 
-	if (!hubbub)
+	if (!dcn10_hubbub)
 		return NULL;
 
-	hubbub1_construct(hubbub, ctx,
+	hubbub1_construct(&dcn10_hubbub->base, ctx,
 			&hubbub_reg,
 			&hubbub_shift,
 			&hubbub_mask);
 
-	return hubbub;
+	return &dcn10_hubbub->base;
 }
 
 static struct timing_generator *dcn10_timing_generator_create(

drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h

@@ -75,5 +75,9 @@ struct hubbub_funcs {
 			struct dcn_hubbub_wm *wm);
 };
 
+struct hubbub {
+	const struct hubbub_funcs *funcs;
+	struct dc_context *ctx;
+};
 
 #endif