drm/amd/display: Remove unused optc3_fpu_set_vrr_m_const

The last use of optc3_fpu_set_vrr_m_const() was removed in 2022's
commit 64f9915 ("drm/amd/display: Fix a compilation failure on PowerPC
caused by FPU code")
which removed the only caller (with a similar) name.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c

@@ -178,82 +178,6 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_0_soc = {
 };
 
 
-void optc3_fpu_set_vrr_m_const(struct timing_generator *optc,
-		double vtotal_avg)
-{
-	struct optc *optc1 = DCN10TG_FROM_TG(optc);
-	double vtotal_min, vtotal_max;
-	double ratio, modulo, phase;
-	uint32_t vblank_start;
-	uint32_t v_total_mask_value = 0;
-
-	dc_assert_fp_enabled();
-
-	/* Compute VTOTAL_MIN and VTOTAL_MAX, so that
-	 * VOTAL_MAX - VTOTAL_MIN = 1
-	 */
-	v_total_mask_value = 16;
-	vtotal_min = dcn_bw_floor(vtotal_avg);
-	vtotal_max = dcn_bw_ceil(vtotal_avg);
-
-	/* Check that bottom VBLANK is at least 2 lines tall when running with
-	 * VTOTAL_MIN. Note that VTOTAL registers are defined as 'total number
-	 * of lines in a frame - 1'.
-	 */
-	REG_GET(OTG_V_BLANK_START_END, OTG_V_BLANK_START,
-		&vblank_start);
-	ASSERT(vtotal_min >= vblank_start + 1);
-
-	/* Special case where the average frame rate can be achieved
-	 * without using the DTO
-	 */
-	if (vtotal_min == vtotal_max) {
-		REG_SET(OTG_V_TOTAL, 0, OTG_V_TOTAL, (uint32_t)vtotal_min);
-
-		optc->funcs->set_vtotal_min_max(optc, 0, 0);
-		REG_SET(OTG_M_CONST_DTO0, 0, OTG_M_CONST_DTO_PHASE, 0);
-		REG_SET(OTG_M_CONST_DTO1, 0, OTG_M_CONST_DTO_MODULO, 0);
-		REG_UPDATE_3(OTG_V_TOTAL_CONTROL,
-			OTG_V_TOTAL_MIN_SEL, 0,
-			OTG_V_TOTAL_MAX_SEL, 0,
-			OTG_SET_V_TOTAL_MIN_MASK_EN, 0);
-		return;
-	}
-
-	ratio = vtotal_max - vtotal_avg;
-	modulo = 65536.0 * 65536.0 - 1.0; /* 2^32 - 1 */
-	phase = ratio * modulo;
-
-	/* Special cases where the DTO phase gets rounded to 0 or
-	 * to DTO modulo
-	 */
-	if (phase <= 0 || phase >= modulo) {
-		REG_SET(OTG_V_TOTAL, 0, OTG_V_TOTAL,
-			phase <= 0 ?
-				(uint32_t)vtotal_max : (uint32_t)vtotal_min);
-		REG_SET(OTG_V_TOTAL_MIN, 0, OTG_V_TOTAL_MIN, 0);
-		REG_SET(OTG_V_TOTAL_MAX, 0, OTG_V_TOTAL_MAX, 0);
-		REG_SET(OTG_M_CONST_DTO0, 0, OTG_M_CONST_DTO_PHASE, 0);
-		REG_SET(OTG_M_CONST_DTO1, 0, OTG_M_CONST_DTO_MODULO, 0);
-		REG_UPDATE_3(OTG_V_TOTAL_CONTROL,
-			OTG_V_TOTAL_MIN_SEL, 0,
-			OTG_V_TOTAL_MAX_SEL, 0,
-			OTG_SET_V_TOTAL_MIN_MASK_EN, 0);
-		return;
-	}
-	REG_UPDATE_6(OTG_V_TOTAL_CONTROL,
-		OTG_V_TOTAL_MIN_SEL, 1,
-		OTG_V_TOTAL_MAX_SEL, 1,
-		OTG_SET_V_TOTAL_MIN_MASK_EN, 1,
-		OTG_SET_V_TOTAL_MIN_MASK, v_total_mask_value,
-		OTG_VTOTAL_MID_REPLACING_MIN_EN, 0,
-		OTG_VTOTAL_MID_REPLACING_MAX_EN, 0);
-	REG_SET(OTG_V_TOTAL, 0, OTG_V_TOTAL, (uint32_t)vtotal_min);
-	optc->funcs->set_vtotal_min_max(optc, vtotal_min, vtotal_max);
-	REG_SET(OTG_M_CONST_DTO0, 0, OTG_M_CONST_DTO_PHASE, (uint32_t)phase);
-	REG_SET(OTG_M_CONST_DTO1, 0, OTG_M_CONST_DTO_MODULO, (uint32_t)modulo);
-}
-
 void dcn30_fpu_populate_dml_writeback_from_context(
 		struct dc *dc, struct resource_context *res_ctx, display_e2e_pipe_params_st *pipes)
 {

drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.h

@@ -29,9 +29,6 @@
 #include "core_types.h"
 #include "dcn20/dcn20_optc.h"
 
-void optc3_fpu_set_vrr_m_const(struct timing_generator *optc,
-		double vtotal_avg);
-
 void dcn30_fpu_populate_dml_writeback_from_context(
 		struct dc *dc, struct resource_context *res_ctx, display_e2e_pipe_params_st *pipes);