drm/amd/display: Add Renoir Hubbub (v2)

Controls the display hw's interface to memory.

v2: rebase (Alex)
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

 #
 # Makefile for DCN21.
 
-DCN21 = dcn21_hubp.o
+DCN21 = dcn21_hubp.o dcn21_hubbub.o
 
 CFLAGS_dcn21_resource.o := -mhard-float -msse -mpreferred-stack-boundary=4
 

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c

+/*
+* Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+#include "dm_services.h"
+#include "dcn20/dcn20_hubbub.h"
+#include "dcn21_hubbub.h"
+#include "reg_helper.h"
+
+#define REG(reg)\
+	hubbub1->regs->reg
+#define DC_LOGGER \
+	hubbub1->base.ctx->logger
+#define CTX \
+	hubbub1->base.ctx
+
+#undef FN
+#define FN(reg_name, field_name) \
+	hubbub1->shifts->field_name, hubbub1->masks->field_name
+
+#define REG(reg)\
+	hubbub1->regs->reg
+
+#define CTX \
+	hubbub1->base.ctx
+
+#undef FN
+#define FN(reg_name, field_name) \
+	hubbub1->shifts->field_name, hubbub1->masks->field_name
+
+#ifdef NUM_VMID
+#undef NUM_VMID
+#endif
+#define NUM_VMID 1
+
+static uint32_t convert_and_clamp(
+	uint32_t wm_ns,
+	uint32_t refclk_mhz,
+	uint32_t clamp_value)
+{
+	uint32_t ret_val = 0;
+	ret_val = wm_ns * refclk_mhz;
+	ret_val /= 1000;
+
+	if (ret_val > clamp_value)
+		ret_val = clamp_value;
+
+	return ret_val;
+}
+
+void dcn21_dchvm_init(struct hubbub *hubbub)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+
+	//Init DCHVM block
+	REG_UPDATE(DCHVM_CTRL0, HOSTVM_INIT_REQ, 1);
+
+	//Poll until RIOMMU_ACTIVE = 1
+	//TODO: Figure out interval us and retry count
+	REG_WAIT(DCHVM_RIOMMU_STAT0, RIOMMU_ACTIVE, 1, 5, 100);
+
+	//Reflect the power status of DCHUBBUB
+	REG_UPDATE(DCHVM_RIOMMU_CTRL0, HOSTVM_POWERSTATUS, 1);
+
+	//Start rIOMMU prefetching
+	REG_UPDATE(DCHVM_RIOMMU_CTRL0, HOSTVM_PREFETCH_REQ, 1);
+
+	// Enable dynamic clock gating
+	REG_UPDATE_4(DCHVM_CLK_CTRL,
+					HVM_DISPCLK_R_GATE_DIS, 0,
+					HVM_DISPCLK_G_GATE_DIS, 0,
+					HVM_DCFCLK_R_GATE_DIS, 0,
+					HVM_DCFCLK_G_GATE_DIS, 0);
+
+	//Poll until HOSTVM_PREFETCH_DONE = 1
+	//TODO: Figure out interval us and retry count
+	REG_WAIT(DCHVM_RIOMMU_STAT0, HOSTVM_PREFETCH_DONE, 1, 5, 100);
+}
+
+static int hubbub21_init_dchub(struct hubbub *hubbub,
+		struct dcn_hubbub_phys_addr_config *pa_config)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+
+	REG_SET(DCN_VM_FB_LOCATION_BASE, 0,
+		FB_BASE, pa_config->system_aperture.fb_base);
+	REG_SET(DCN_VM_FB_LOCATION_TOP, 0,
+			FB_TOP, pa_config->system_aperture.fb_top);
+	REG_SET(DCN_VM_FB_OFFSET, 0,
+			FB_OFFSET, pa_config->system_aperture.fb_offset);
+	REG_SET(DCN_VM_AGP_BOT, 0,
+			AGP_BOT, pa_config->system_aperture.agp_bot);
+	REG_SET(DCN_VM_AGP_TOP, 0,
+			AGP_TOP, pa_config->system_aperture.agp_top);
+	REG_SET(DCN_VM_AGP_BASE, 0,
+			AGP_BASE, pa_config->system_aperture.agp_base);
+
+	dcn21_dchvm_init(hubbub);
+
+	return NUM_VMID;
+}
+
+static void hubbub21_program_urgent_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+
+	/* Repeat for water mark set A, B, C and D. */
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.urgent_ns > hubbub1->watermarks.a.urgent_ns) {
+		hubbub1->watermarks.a.urgent_ns = watermarks->a.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->a.urgent_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_A, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->a.urgent_ns, prog_wm_value);
+	}
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->a.frac_urg_bw_flip
+			> hubbub1->watermarks.a.frac_urg_bw_flip) {
+		hubbub1->watermarks.a.frac_urg_bw_flip = watermarks->a.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A, watermarks->a.frac_urg_bw_flip);
+	}
+
+	if (safe_to_lower || watermarks->a.frac_urg_bw_nom
+			> hubbub1->watermarks.a.frac_urg_bw_nom) {
+		hubbub1->watermarks.a.frac_urg_bw_nom = watermarks->a.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_A, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_A, watermarks->a.frac_urg_bw_nom);
+	}
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.urgent_ns > hubbub1->watermarks.b.urgent_ns) {
+		hubbub1->watermarks.b.urgent_ns = watermarks->b.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->b.urgent_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_B, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->b.urgent_ns, prog_wm_value);
+	}
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->a.frac_urg_bw_flip
+			> hubbub1->watermarks.a.frac_urg_bw_flip) {
+		hubbub1->watermarks.a.frac_urg_bw_flip = watermarks->a.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B, watermarks->a.frac_urg_bw_flip);
+	}
+
+	if (safe_to_lower || watermarks->a.frac_urg_bw_nom
+			> hubbub1->watermarks.a.frac_urg_bw_nom) {
+		hubbub1->watermarks.a.frac_urg_bw_nom = watermarks->a.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_B, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_B, watermarks->a.frac_urg_bw_nom);
+	}
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.urgent_ns > hubbub1->watermarks.c.urgent_ns) {
+		hubbub1->watermarks.c.urgent_ns = watermarks->c.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->c.urgent_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_C, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->c.urgent_ns, prog_wm_value);
+	}
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->a.frac_urg_bw_flip
+			> hubbub1->watermarks.a.frac_urg_bw_flip) {
+		hubbub1->watermarks.a.frac_urg_bw_flip = watermarks->a.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C, watermarks->a.frac_urg_bw_flip);
+	}
+
+	if (safe_to_lower || watermarks->a.frac_urg_bw_nom
+			> hubbub1->watermarks.a.frac_urg_bw_nom) {
+		hubbub1->watermarks.a.frac_urg_bw_nom = watermarks->a.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_C, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_C, watermarks->a.frac_urg_bw_nom);
+	}
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.urgent_ns > hubbub1->watermarks.d.urgent_ns) {
+		hubbub1->watermarks.d.urgent_ns = watermarks->d.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->d.urgent_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_D, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->d.urgent_ns, prog_wm_value);
+	}
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->a.frac_urg_bw_flip
+			> hubbub1->watermarks.a.frac_urg_bw_flip) {
+		hubbub1->watermarks.a.frac_urg_bw_flip = watermarks->a.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D, watermarks->a.frac_urg_bw_flip);
+	}
+
+	if (safe_to_lower || watermarks->a.frac_urg_bw_nom
+			> hubbub1->watermarks.a.frac_urg_bw_nom) {
+		hubbub1->watermarks.a.frac_urg_bw_nom = watermarks->a.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_D, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_D, watermarks->a.frac_urg_bw_nom);
+	}
+}
+
+static void hubbub21_program_stutter_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub1->watermarks.a.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub1->watermarks.a.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	}
+
+	if (safe_to_lower || watermarks->a.cstate_pstate.cstate_exit_ns
+			> hubbub1->watermarks.a.cstate_pstate.cstate_exit_ns) {
+		hubbub1->watermarks.a.cstate_pstate.cstate_exit_ns =
+				watermarks->a.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->a.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	}
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub1->watermarks.b.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub1->watermarks.b.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_B, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	}
+
+	if (safe_to_lower || watermarks->b.cstate_pstate.cstate_exit_ns
+			> hubbub1->watermarks.b.cstate_pstate.cstate_exit_ns) {
+		hubbub1->watermarks.b.cstate_pstate.cstate_exit_ns =
+				watermarks->b.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->b.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	}
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub1->watermarks.c.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub1->watermarks.c.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_C, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	}
+
+	if (safe_to_lower || watermarks->c.cstate_pstate.cstate_exit_ns
+			> hubbub1->watermarks.c.cstate_pstate.cstate_exit_ns) {
+		hubbub1->watermarks.c.cstate_pstate.cstate_exit_ns =
+				watermarks->c.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->c.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	}
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub1->watermarks.d.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub1->watermarks.d.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_D, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	}
+
+	if (safe_to_lower || watermarks->d.cstate_pstate.cstate_exit_ns
+			> hubbub1->watermarks.d.cstate_pstate.cstate_exit_ns) {
+		hubbub1->watermarks.d.cstate_pstate.cstate_exit_ns =
+				watermarks->d.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->d.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	}
+}
+
+static void hubbub21_program_pstate_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.cstate_pstate.pstate_change_ns
+			> hubbub1->watermarks.a.cstate_pstate.pstate_change_ns) {
+		hubbub1->watermarks.a.cstate_pstate.pstate_change_ns =
+				watermarks->a.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A, 0,
+				DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->a.cstate_pstate.pstate_change_ns, prog_wm_value);
+	}
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.cstate_pstate.pstate_change_ns
+			> hubbub1->watermarks.b.cstate_pstate.pstate_change_ns) {
+		hubbub1->watermarks.b.cstate_pstate.pstate_change_ns =
+				watermarks->b.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B, 0,
+				DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->b.cstate_pstate.pstate_change_ns, prog_wm_value);
+	}
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.cstate_pstate.pstate_change_ns
+			> hubbub1->watermarks.c.cstate_pstate.pstate_change_ns) {
+		hubbub1->watermarks.c.cstate_pstate.pstate_change_ns =
+				watermarks->c.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C, 0,
+				DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->c.cstate_pstate.pstate_change_ns, prog_wm_value);
+	}
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.cstate_pstate.pstate_change_ns
+			> hubbub1->watermarks.d.cstate_pstate.pstate_change_ns) {
+		hubbub1->watermarks.d.cstate_pstate.pstate_change_ns =
+				watermarks->d.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0x1fffff);
+		REG_SET_2(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, 0,
+				DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, prog_wm_value,
+				DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->d.cstate_pstate.pstate_change_ns, prog_wm_value);
+	}
+}
+
+void hubbub21_program_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+
+	hubbub21_program_urgent_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower);
+	hubbub21_program_stutter_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower);
+	hubbub21_program_pstate_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower);
+
+	/*
+	 * The DCHub arbiter has a mechanism to dynamically rate limit the DCHub request stream to the fabric.
+	 * If the memory controller is fully utilized and the DCHub requestors are
+	 * well ahead of their amortized schedule, then it is safe to prevent the next winner
+	 * from being committed and sent to the fabric.
+	 * The utilization of the memory controller is approximated by ensuring that
+	 * the number of outstanding requests is greater than a threshold specified
+	 * by the ARB_MIN_REQ_OUTSTANDING. To determine that the DCHub requestors are well ahead of the amortized schedule,
+	 * the slack of the next winner is compared with the ARB_SAT_LEVEL in DLG RefClk cycles.
+	 *
+	 * TODO: Revisit request limit after figure out right number. request limit for Renoir isn't decided yet, set maximum value (0x1FF)
+	 * to turn off it for now.
+	 */
+	REG_SET(DCHUBBUB_ARB_SAT_LEVEL, 0,
+			DCHUBBUB_ARB_SAT_LEVEL, 60 * refclk_mhz);
+	REG_UPDATE_2(DCHUBBUB_ARB_DF_REQ_OUTSTAND,
+			DCHUBBUB_ARB_MIN_REQ_OUTSTAND, 0x1FF,
+			DCHUBBUB_ARB_MIN_REQ_OUTSTAND_COMMIT_THRESHOLD, 0xA);
+	REG_UPDATE(DCHUBBUB_ARB_HOSTVM_CNTL,
+			DCHUBBUB_ARB_MAX_QOS_COMMIT_THRESHOLD, 0xF);
+
+	hubbub1_allow_self_refresh_control(hubbub, !hubbub->ctx->dc->debug.disable_stutter);
+}
+
+void hubbub21_wm_read_state(struct hubbub *hubbub,
+		struct dcn_hubbub_wm *wm)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+	struct dcn_hubbub_wm_set *s;
+
+	memset(wm, 0, sizeof(struct dcn_hubbub_wm));
+
+	s = &wm->sets[0];
+	s->wm_set = 0;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A,
+			 DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A, &s->dram_clk_chanage);
+
+	s = &wm->sets[1];
+	s->wm_set = 1;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B,
+			DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B, &s->dram_clk_chanage);
+
+	s = &wm->sets[2];
+	s->wm_set = 2;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C,
+			DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C, &s->dram_clk_chanage);
+
+	s = &wm->sets[3];
+	s->wm_set = 3;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D,
+			DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, &s->dram_clk_chanage);
+}
+
+
+static const struct hubbub_funcs hubbub21_funcs = {
+	.update_dchub = hubbub2_update_dchub,
+	.init_dchub_sys_ctx = hubbub21_init_dchub,
+	.init_vm_ctx = NULL,
+	.dcc_support_swizzle = hubbub2_dcc_support_swizzle,
+	.dcc_support_pixel_format = hubbub2_dcc_support_pixel_format,
+	.get_dcc_compression_cap = hubbub2_get_dcc_compression_cap,
+	.wm_read_state = hubbub21_wm_read_state,
+	.get_dchub_ref_freq = hubbub2_get_dchub_ref_freq,
+	.program_watermarks = hubbub21_program_watermarks,
+};
+
+void hubbub21_construct(struct dcn20_hubbub *hubbub,
+	struct dc_context *ctx,
+	const struct dcn_hubbub_registers *hubbub_regs,
+	const struct dcn_hubbub_shift *hubbub_shift,
+	const struct dcn_hubbub_mask *hubbub_mask)
+{
+	hubbub->base.ctx = ctx;
+
+	hubbub->base.funcs = &hubbub21_funcs;
+
+	hubbub->regs = hubbub_regs;
+	hubbub->shifts = hubbub_shift;
+	hubbub->masks = hubbub_mask;
+
+	hubbub->debug_test_index_pstate = 0xB;
+}

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.h

+/*
+* Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+#ifndef DAL_DC_DCN21_DCN21_HUBBUB_H_
+#define DAL_DC_DCN21_DCN21_HUBBUB_H_
+
+#include "dcn20/dcn20_hubbub.h"
+
+#define HUBBUB_HVM_REG_LIST() \
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_NOM_A),\
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_NOM_B),\
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_NOM_C),\
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_NOM_D),\
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A),\
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B),\
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C),\
+	SR(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D),\
+	SR(DCHUBBUB_ARB_HOSTVM_CNTL), \
+	SR(DCHVM_CTRL0), \
+	SR(DCHVM_MEM_CTRL), \
+	SR(DCHVM_CLK_CTRL), \
+	SR(DCHVM_RIOMMU_CTRL0), \
+	SR(DCHVM_RIOMMU_STAT0)
+
+#define HUBBUB_REG_LIST_DCN21()\
+	HUBBUB_REG_LIST_DCN_COMMON(), \
+	HUBBUB_SR_WATERMARK_REG_LIST(), \
+	HUBBUB_HVM_REG_LIST(), \
+	SR(DCHUBBUB_CRC_CTRL), \
+	SR(DCN_VM_FB_LOCATION_BASE),\
+	SR(DCN_VM_FB_LOCATION_TOP),\
+	SR(DCN_VM_FB_OFFSET),\
+	SR(DCN_VM_AGP_BOT),\
+	SR(DCN_VM_AGP_TOP),\
+	SR(DCN_VM_AGP_BASE)
+
+#define HUBBUB_MASK_SH_LIST_HVM(mask_sh) \
+	HUBBUB_SF(DCHUBBUB_ARB_DF_REQ_OUTSTAND, DCHUBBUB_ARB_MIN_REQ_OUTSTAND_COMMIT_THRESHOLD, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A, DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B, DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C, DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D, DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_NOM_A, DCHUBBUB_ARB_FRAC_URG_BW_NOM_A, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_NOM_B, DCHUBBUB_ARB_FRAC_URG_BW_NOM_B, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_NOM_C, DCHUBBUB_ARB_FRAC_URG_BW_NOM_C, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_FRAC_URG_BW_NOM_D, DCHUBBUB_ARB_FRAC_URG_BW_NOM_D, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_A, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_B, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_C, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, DCHUBBUB_ARB_VM_ROW_URGENCY_WATERMARK_D, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_A, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_B, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_C, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_ENTER_WATERMARK_D, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_A, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_B, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_C, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, DCHUBBUB_ARB_VM_ROW_ALLOW_SR_EXIT_WATERMARK_D, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A, DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B, DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C, DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, DCHUBBUB_ARB_VM_ROW_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_HOSTVM_CNTL, DCHUBBUB_ARB_MAX_QOS_COMMIT_THRESHOLD, mask_sh), \
+	HUBBUB_SF(DCHVM_CTRL0, HOSTVM_INIT_REQ, mask_sh), \
+	HUBBUB_SF(DCHVM_MEM_CTRL, HVM_GPUVMRET_PWR_REQ_DIS, mask_sh), \
+	HUBBUB_SF(DCHVM_MEM_CTRL, HVM_GPUVMRET_FORCE_REQ, mask_sh), \
+	HUBBUB_SF(DCHVM_MEM_CTRL, HVM_GPUVMRET_POWER_STATUS, mask_sh), \
+	HUBBUB_SF(DCHVM_CLK_CTRL, HVM_DISPCLK_R_GATE_DIS, mask_sh), \
+	HUBBUB_SF(DCHVM_CLK_CTRL, HVM_DISPCLK_G_GATE_DIS, mask_sh), \
+	HUBBUB_SF(DCHVM_CLK_CTRL, HVM_DCFCLK_R_GATE_DIS, mask_sh), \
+	HUBBUB_SF(DCHVM_CLK_CTRL, HVM_DCFCLK_G_GATE_DIS, mask_sh), \
+	HUBBUB_SF(DCHVM_CLK_CTRL, TR_REQ_REQCLKREQ_MODE, mask_sh), \
+	HUBBUB_SF(DCHVM_CLK_CTRL, TW_RSP_COMPCLKREQ_MODE, mask_sh), \
+	HUBBUB_SF(DCHVM_RIOMMU_CTRL0, HOSTVM_PREFETCH_REQ, mask_sh), \
+	HUBBUB_SF(DCHVM_RIOMMU_CTRL0, HOSTVM_POWERSTATUS, mask_sh), \
+	HUBBUB_SF(DCHVM_RIOMMU_STAT0, RIOMMU_ACTIVE, mask_sh), \
+	HUBBUB_SF(DCHVM_RIOMMU_STAT0, HOSTVM_PREFETCH_DONE, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_A, DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_A, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_B, DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_B, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_C, DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_C, mask_sh), \
+	HUBBUB_SF(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_D, DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_D, mask_sh)
+
+#define HUBBUB_MASK_SH_LIST_DCN21(mask_sh)\
+	HUBBUB_MASK_SH_LIST_HVM(mask_sh),\
+	HUBBUB_MASK_SH_LIST_DCN_COMMON(mask_sh), \
+	HUBBUB_MASK_SH_LIST_STUTTER(mask_sh), \
+	HUBBUB_SF(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_REFDIV, mask_sh), \
+	HUBBUB_SF(DCN_VM_FB_LOCATION_BASE, FB_BASE, mask_sh), \
+	HUBBUB_SF(DCN_VM_FB_LOCATION_TOP, FB_TOP, mask_sh), \
+	HUBBUB_SF(DCN_VM_FB_OFFSET, FB_OFFSET, mask_sh), \
+	HUBBUB_SF(DCN_VM_AGP_BOT, AGP_BOT, mask_sh), \
+	HUBBUB_SF(DCN_VM_AGP_TOP, AGP_TOP, mask_sh), \
+	HUBBUB_SF(DCN_VM_AGP_BASE, AGP_BASE, mask_sh)
+
+void dcn21_dchvm_init(struct hubbub *hubbub);
+void hubbub21_program_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower);
+
+void hubbub21_wm_read_state(struct hubbub *hubbub,
+		struct dcn_hubbub_wm *wm);
+
+void hubbub21_construct(struct dcn20_hubbub *hubbub,
+	struct dc_context *ctx,
+	const struct dcn_hubbub_registers *hubbub_regs,
+	const struct dcn_hubbub_shift *hubbub_shift,
+	const struct dcn_hubbub_mask *hubbub_mask);
+
+#endif /* DAL_DC_DCN21_DCN21_HUBBUB_H_ */