drm/amd/display: Implement cursor multiplier

DCN allows cursor multiplier when blending FP16 surface.
Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_hw_types.h

@@ -490,6 +490,7 @@ struct dc_cursor_attributes {
 	uint32_t height;
 
 	enum dc_cursor_color_format color_format;
+	uint32_t sdr_white_level; // for boosting (SDR) cursor in HDR mode
 
 	/* In case we support HW Cursor rotation in the future */
 	enum dc_rotation_angle rotation_angle;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c

@@ -27,6 +27,7 @@
 #include "reg_helper.h"
 #include "basics/conversion.h"
 #include "dcn10_hubp.h"
+#include "custom_float.h"
 
 #define REG(reg)\
 	hubp1->hubp_regs->reg
@@ -1038,6 +1039,18 @@ void hubp1_cursor_set_attributes(
 	enum cursor_pitch hw_pitch = hubp1_get_cursor_pitch(attr->pitch);
 	enum cursor_lines_per_chunk lpc = hubp1_get_lines_per_chunk(
 			attr->width, attr->color_format);
+	struct fixed31_32 multiplier;
+	uint32_t hw_mult = 0x3c00; // 1.0 default multiplier
+	struct custom_float_format fmt;
+
+	fmt.exponenta_bits = 5;
+	fmt.mantissa_bits = 10;
+	fmt.sign = true;
+
+	if (attr->sdr_white_level > 80) {
+		multiplier = dc_fixpt_from_fraction(attr->sdr_white_level, 80);
+		convert_to_custom_float_format(multiplier, &fmt, &hw_mult);
+	}
 
 	hubp->curs_attr = *attr;
 
@@ -1060,6 +1073,8 @@ void hubp1_cursor_set_attributes(
 			CURSOR0_DST_Y_OFFSET, 0,
 			 /* used to shift the cursor chunk request deadline */
 			CURSOR0_CHUNK_HDL_ADJUST, 3);
+
+	REG_UPDATE(CURSOR0_FP_SCALE_BIAS, CUR0_FP_SCALE, hw_mult);
 }
 
 void hubp1_cursor_set_position(

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h

@@ -133,7 +133,8 @@
 	SRI(CURSOR_CONTROL, CURSOR, id), \
 	SRI(CURSOR_POSITION, CURSOR, id), \
 	SRI(CURSOR_HOT_SPOT, CURSOR, id), \
-	SRI(CURSOR_DST_OFFSET, CURSOR, id)
+	SRI(CURSOR_DST_OFFSET, CURSOR, id), \
+	SRI(CURSOR0_FP_SCALE_BIAS, CNVC_CUR, id)
 
 #define HUBP_COMMON_REG_VARIABLE_LIST \
 	uint32_t DCHUBP_CNTL; \
@@ -241,7 +242,8 @@
 	uint32_t CURSOR_POSITION; \
 	uint32_t CURSOR_HOT_SPOT; \
 	uint32_t CURSOR_DST_OFFSET; \
-	uint32_t HUBP_CLK_CNTL
+	uint32_t HUBP_CLK_CNTL; \
+	uint32_t CURSOR0_FP_SCALE_BIAS
 
 #define HUBP_SF(reg_name, field_name, post_fix)\
 	.field_name = reg_name ## __ ## field_name ## post_fix
@@ -424,7 +426,8 @@
 	HUBP_SF(CURSOR0_CURSOR_POSITION, CURSOR_Y_POSITION, mask_sh), \
 	HUBP_SF(CURSOR0_CURSOR_HOT_SPOT, CURSOR_HOT_SPOT_X, mask_sh), \
 	HUBP_SF(CURSOR0_CURSOR_HOT_SPOT, CURSOR_HOT_SPOT_Y, mask_sh), \
-	HUBP_SF(CURSOR0_CURSOR_DST_OFFSET, CURSOR_DST_X_OFFSET, mask_sh)
+	HUBP_SF(CURSOR0_CURSOR_DST_OFFSET, CURSOR_DST_X_OFFSET, mask_sh), \
+	HUBP_SF(CNVC_CUR0_CURSOR0_FP_SCALE_BIAS, CUR0_FP_SCALE, mask_sh)
 
 #define DCN_HUBP_REG_FIELD_LIST(type) \
 	type HUBP_BLANK_EN;\
@@ -615,7 +618,8 @@
 	type CURSOR_HOT_SPOT_X; \
 	type CURSOR_HOT_SPOT_Y; \
 	type CURSOR_DST_X_OFFSET; \
-	type OUTPUT_FP
+	type OUTPUT_FP; \
+	type CUR0_FP_SCALE
 
 struct dcn_mi_registers {
 	HUBP_COMMON_REG_VARIABLE_LIST;