drm/amd/display: move FPU operations from dcn21 to dml/dcn20 folder

dml/dcn20_fpu file centralizes all DCN2x functions that require FPU access.
Therefore, this patch moves FPU-related code from dcn21 to dcn20_fpu. These
include:
- dcn21_populate_dml_pipes_from_context()
- dcn21_validate_bandwidth_fp() and related:
  - dcn21_calculate_wm(),
  - patch_bounding_box(),
  - calculate_wm_set_for_vlevel()
- renaming update_bw_bounding_box() to dcn21_update_bw_bounding_box(), move
to dcn20_fpu with related static function construct_low_pstate_lvl()

Also, make dcn21_fast_validate_bw() public in dcn21_resource as it is called
by dcn21_validate_bandwidth_fp() now in dcn20_fpu.

Reuse dcn20_fpu_adjust_dppclk() in dcn21_fast_validate_bw() as it isolates
the same FPU operation.

Include dchubbub.h as it is required in dcn21_populate_dml_pipes_from_context()
Signed-off-by: Melissa Wen <mwen@igalia.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn21/Makefile

@@ -5,31 +5,6 @@
 DCN21 = dcn21_init.o dcn21_hubp.o dcn21_hubbub.o dcn21_resource.o \
 	 dcn21_hwseq.o dcn21_link_encoder.o dcn21_dccg.o
 
-ifdef CONFIG_X86
-CFLAGS_$(AMDDALPATH)/dc/dcn21/dcn21_resource.o := -mhard-float -msse
-endif
-
-ifdef CONFIG_PPC64
-CFLAGS_$(AMDDALPATH)/dc/dcn21/dcn21_resource.o := -mhard-float -maltivec
-endif
-
-ifdef CONFIG_CC_IS_GCC
-ifeq ($(call cc-ifversion, -lt, 0701, y), y)
-IS_OLD_GCC = 1
-endif
-endif
-
-ifdef CONFIG_X86
-ifdef IS_OLD_GCC
-# Stack alignment mismatch, proceed with caution.
-# GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
-# (8B stack alignment).
-CFLAGS_$(AMDDALPATH)/dc/dcn21/dcn21_resource.o += -mpreferred-stack-boundary=4
-else
-CFLAGS_$(AMDDALPATH)/dc/dcn21/dcn21_resource.o += -msse2
-endif
-endif
-
 AMD_DAL_DCN21 = $(addprefix $(AMDDALPATH)/dc/dcn21/,$(DCN21))
 
 AMD_DISPLAY_FILES += $(AMD_DAL_DCN21)

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.h

@@ -35,11 +35,22 @@ struct dc;
 struct resource_pool;
 struct _vcs_dpi_display_pipe_params_st;
 
+extern struct _vcs_dpi_ip_params_st dcn2_1_ip;
+extern struct _vcs_dpi_soc_bounding_box_st dcn2_1_soc;
+
 struct dcn21_resource_pool {
 	struct resource_pool base;
 };
 struct resource_pool *dcn21_create_resource_pool(
 		const struct dc_init_data *init_data,
 		struct dc *dc);
+bool dcn21_fast_validate_bw(
+		struct dc *dc,
+		struct dc_state *context,
+		display_e2e_pipe_params_st *pipes,
+		int *pipe_cnt_out,
+		int *pipe_split_from,
+		int *vlevel_out,
+		bool fast_validate);
 
 #endif /* _DCN21_RESOURCE_H_ */

drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h

@@ -73,4 +73,13 @@ void dcn20_fpu_adjust_dppclk(struct vba_vars_st *v,
 			     int pipe_idx,
 			     bool is_validating_bw);
 
+int dcn21_populate_dml_pipes_from_context(struct dc *dc,
+					  struct dc_state *context,
+					  display_e2e_pipe_params_st *pipes,
+					  bool fast_validate);
+bool dcn21_validate_bandwidth_fp(struct dc *dc,
+				 struct dc_state *context,
+				 bool fast_validate);
+void dcn21_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params);
+
 #endif /* __DCN20_FPU_H__ */