diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e75b9b2a0e015a..c6c566a6572b8b 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -293,11 +293,11 @@ static void
 skl_wa_827(struct drm_i915_private *dev_priv, enum pipe pipe, bool enable)
 {
 	if (enable)
-		intel_de_write(dev_priv, CLKGATE_DIS_PSL(pipe),
-		               intel_de_read(dev_priv, CLKGATE_DIS_PSL(pipe)) | DUPS1_GATING_DIS | DUPS2_GATING_DIS);
+		intel_de_rmw(dev_priv, CLKGATE_DIS_PSL(pipe),
+			     0, DUPS1_GATING_DIS | DUPS2_GATING_DIS);
 	else
-		intel_de_write(dev_priv, CLKGATE_DIS_PSL(pipe),
-		               intel_de_read(dev_priv, CLKGATE_DIS_PSL(pipe)) & ~(DUPS1_GATING_DIS | DUPS2_GATING_DIS));
+		intel_de_rmw(dev_priv, CLKGATE_DIS_PSL(pipe),
+		             DUPS1_GATING_DIS | DUPS2_GATING_DIS, 0);
 }
 
 /* Wa_2006604312:icl,ehl */
@@ -306,11 +306,9 @@ icl_wa_scalerclkgating(struct drm_i915_private *dev_priv, enum pipe pipe,
 		       bool enable)
 {
 	if (enable)
-		intel_de_write(dev_priv, CLKGATE_DIS_PSL(pipe),
-		               intel_de_read(dev_priv, CLKGATE_DIS_PSL(pipe)) | DPFR_GATING_DIS);
+		intel_de_rmw(dev_priv, CLKGATE_DIS_PSL(pipe), 0, DPFR_GATING_DIS);
 	else
-		intel_de_write(dev_priv, CLKGATE_DIS_PSL(pipe),
-		               intel_de_read(dev_priv, CLKGATE_DIS_PSL(pipe)) & ~DPFR_GATING_DIS);
+		intel_de_rmw(dev_priv, CLKGATE_DIS_PSL(pipe), DPFR_GATING_DIS, 0);
 }
 
 /* Wa_1604331009:icl,jsl,ehl */
@@ -1852,12 +1850,10 @@ static void hsw_set_frame_start_delay(const struct intel_crtc_state *crtc_state)
 	enum transcoder transcoder = crtc_state->cpu_transcoder;
 	i915_reg_t reg = DISPLAY_VER(dev_priv) >= 14 ? MTL_CHICKEN_TRANS(transcoder) :
 			 CHICKEN_TRANS(transcoder);
-	u32 val;
 
-	val = intel_de_read(dev_priv, reg);
-	val &= ~HSW_FRAME_START_DELAY_MASK;
-	val |= HSW_FRAME_START_DELAY(crtc_state->framestart_delay - 1);
-	intel_de_write(dev_priv, reg, val);
+	intel_de_rmw(dev_priv, reg,
+		     HSW_FRAME_START_DELAY_MASK,
+		     HSW_FRAME_START_DELAY(crtc_state->framestart_delay - 1));
 }
 
 static void icl_ddi_bigjoiner_pre_enable(struct intel_atomic_state *state,
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 1a23ecd4623a53..90d7a623d6e3cc 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -1260,9 +1260,7 @@ static void hsw_disable_lcpll(struct drm_i915_private *dev_priv,
 		drm_err(&dev_priv->drm, "D_COMP RCOMP still in progress\n");
 
 	if (allow_power_down) {
-		val = intel_de_read(dev_priv, LCPLL_CTL);
-		val |= LCPLL_POWER_DOWN_ALLOW;
-		intel_de_write(dev_priv, LCPLL_CTL, val);
+		intel_de_rmw(dev_priv, LCPLL_CTL, 0, LCPLL_POWER_DOWN_ALLOW);
 		intel_de_posting_read(dev_priv, LCPLL_CTL);
 	}
 }
@@ -1306,9 +1304,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
 		drm_err(&dev_priv->drm, "LCPLL not locked yet\n");
 
 	if (val & LCPLL_CD_SOURCE_FCLK) {
-		val = intel_de_read(dev_priv, LCPLL_CTL);
-		val &= ~LCPLL_CD_SOURCE_FCLK;
-		intel_de_write(dev_priv, LCPLL_CTL, val);
+		intel_de_rmw(dev_priv, LCPLL_CTL, LCPLL_CD_SOURCE_FCLK, 0);
 
 		if (wait_for_us((intel_de_read(dev_priv, LCPLL_CTL) &
 				 LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
@@ -1347,15 +1343,11 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
  */
 static void hsw_enable_pc8(struct drm_i915_private *dev_priv)
 {
-	u32 val;
-
 	drm_dbg_kms(&dev_priv->drm, "Enabling package C8+\n");
 
-	if (HAS_PCH_LPT_LP(dev_priv)) {
-		val = intel_de_read(dev_priv, SOUTH_DSPCLK_GATE_D);
-		val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
-		intel_de_write(dev_priv, SOUTH_DSPCLK_GATE_D, val);
-	}
+	if (HAS_PCH_LPT_LP(dev_priv))
+		intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D,
+			     PCH_LP_PARTITION_LEVEL_DISABLE, 0);
 
 	lpt_disable_clkout_dp(dev_priv);
 	hsw_disable_lcpll(dev_priv, true, true);
@@ -1363,25 +1355,21 @@ static void hsw_enable_pc8(struct drm_i915_private *dev_priv)
 
 static void hsw_disable_pc8(struct drm_i915_private *dev_priv)
 {
-	u32 val;
-
 	drm_dbg_kms(&dev_priv->drm, "Disabling package C8+\n");
 
 	hsw_restore_lcpll(dev_priv);
 	intel_init_pch_refclk(dev_priv);
 
-	if (HAS_PCH_LPT_LP(dev_priv)) {
-		val = intel_de_read(dev_priv, SOUTH_DSPCLK_GATE_D);
-		val |= PCH_LP_PARTITION_LEVEL_DISABLE;
-		intel_de_write(dev_priv, SOUTH_DSPCLK_GATE_D, val);
-	}
+	if (HAS_PCH_LPT_LP(dev_priv))
+		intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D,
+			     0, PCH_LP_PARTITION_LEVEL_DISABLE);
 }
 
 static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
 				      bool enable)
 {
 	i915_reg_t reg;
-	u32 reset_bits, val;
+	u32 reset_bits;
 
 	if (IS_IVYBRIDGE(dev_priv)) {
 		reg = GEN7_MSG_CTL;
@@ -1394,14 +1382,7 @@ static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
 	if (DISPLAY_VER(dev_priv) >= 14)
 		reset_bits |= MTL_RESET_PICA_HANDSHAKE_EN;
 
-	val = intel_de_read(dev_priv, reg);
-
-	if (enable)
-		val |= reset_bits;
-	else
-		val &= ~reset_bits;
-
-	intel_de_write(dev_priv, reg, val);
+	intel_de_rmw(dev_priv, reg, reset_bits, enable ? reset_bits : 0);
 }
 
 static void skl_display_core_init(struct drm_i915_private *dev_priv,
@@ -1618,7 +1599,6 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
 {
 	struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 	struct i915_power_well *well;
-	u32 val;
 
 	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
 
@@ -1670,11 +1650,10 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
 		intel_dmc_load_program(dev_priv);
 
 	/* Wa_14011508470:tgl,dg1,rkl,adl-s,adl-p */
-	if (DISPLAY_VER(dev_priv) >= 12) {
-		val = DCPR_CLEAR_MEMSTAT_DIS | DCPR_SEND_RESP_IMM |
-		      DCPR_MASK_LPMODE | DCPR_MASK_MAXLATENCY_MEMUP_CLR;
-		intel_de_rmw(dev_priv, GEN11_CHICKEN_DCPR_2, 0, val);
-	}
+	if (DISPLAY_VER(dev_priv) >= 12)
+		intel_de_rmw(dev_priv, GEN11_CHICKEN_DCPR_2, 0,
+			     DCPR_CLEAR_MEMSTAT_DIS | DCPR_SEND_RESP_IMM |
+			     DCPR_MASK_LPMODE | DCPR_MASK_MAXLATENCY_MEMUP_CLR);
 
 	/* Wa_14011503030:xelpd */
 	if (DISPLAY_VER(dev_priv) >= 13)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
index 8710dd41ffd4c6..05b431f968cb49 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
@@ -333,7 +333,6 @@ static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
 {
 	const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
 	int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
-	u32 val;
 
 	if (power_well->desc->has_fuses) {
 		enum skl_power_gate pg;
@@ -356,9 +355,7 @@ static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
 			gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0);
 	}
 
-	val = intel_de_read(dev_priv, regs->driver);
-	intel_de_write(dev_priv, regs->driver,
-		       val | HSW_PWR_WELL_CTL_REQ(pw_idx));
+	intel_de_rmw(dev_priv, regs->driver, 0, HSW_PWR_WELL_CTL_REQ(pw_idx));
 
 	hsw_wait_for_power_well_enable(dev_priv, power_well, false);
 
@@ -380,14 +377,11 @@ static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
 {
 	const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
 	int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
-	u32 val;
 
 	hsw_power_well_pre_disable(dev_priv,
 				   power_well->desc->irq_pipe_mask);
 
-	val = intel_de_read(dev_priv, regs->driver);
-	intel_de_write(dev_priv, regs->driver,
-		       val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
+	intel_de_rmw(dev_priv, regs->driver, HSW_PWR_WELL_CTL_REQ(pw_idx), 0);
 	hsw_wait_for_power_well_disable(dev_priv, power_well);
 }
 
@@ -398,29 +392,22 @@ icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
 	const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
 	int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
 	enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well);
-	u32 val;
 
 	drm_WARN_ON(&dev_priv->drm, !IS_ICELAKE(dev_priv));
 
-	val = intel_de_read(dev_priv, regs->driver);
-	intel_de_write(dev_priv, regs->driver,
-		       val | HSW_PWR_WELL_CTL_REQ(pw_idx));
+	intel_de_rmw(dev_priv, regs->driver, 0, HSW_PWR_WELL_CTL_REQ(pw_idx));
 
-	if (DISPLAY_VER(dev_priv) < 12) {
-		val = intel_de_read(dev_priv, ICL_PORT_CL_DW12(phy));
-		intel_de_write(dev_priv, ICL_PORT_CL_DW12(phy),
-			       val | ICL_LANE_ENABLE_AUX);
-	}
+	if (DISPLAY_VER(dev_priv) < 12)
+		intel_de_rmw(dev_priv, ICL_PORT_CL_DW12(phy),
+			     0, ICL_LANE_ENABLE_AUX);
 
 	hsw_wait_for_power_well_enable(dev_priv, power_well, false);
 
 	/* Display WA #1178: icl */
 	if (pw_idx >= ICL_PW_CTL_IDX_AUX_A && pw_idx <= ICL_PW_CTL_IDX_AUX_B &&
-	    !intel_bios_is_port_edp(dev_priv, (enum port)phy)) {
-		val = intel_de_read(dev_priv, ICL_AUX_ANAOVRD1(pw_idx));
-		val |= ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS;
-		intel_de_write(dev_priv, ICL_AUX_ANAOVRD1(pw_idx), val);
-	}
+	    !intel_bios_is_port_edp(dev_priv, (enum port)phy))
+		intel_de_rmw(dev_priv, ICL_AUX_ANAOVRD1(pw_idx),
+			     0, ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS);
 }
 
 static void
@@ -430,17 +417,12 @@ icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
 	const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
 	int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
 	enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well);
-	u32 val;
 
 	drm_WARN_ON(&dev_priv->drm, !IS_ICELAKE(dev_priv));
 
-	val = intel_de_read(dev_priv, ICL_PORT_CL_DW12(phy));
-	intel_de_write(dev_priv, ICL_PORT_CL_DW12(phy),
-		       val & ~ICL_LANE_ENABLE_AUX);
+	intel_de_rmw(dev_priv, ICL_PORT_CL_DW12(phy), ICL_LANE_ENABLE_AUX, 0);
 
-	val = intel_de_read(dev_priv, regs->driver);
-	intel_de_write(dev_priv, regs->driver,
-		       val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
+	intel_de_rmw(dev_priv, regs->driver, HSW_PWR_WELL_CTL_REQ(pw_idx), 0);
 
 	hsw_wait_for_power_well_disable(dev_priv, power_well);
 }
@@ -502,19 +484,15 @@ icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
 	const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
 	bool is_tbt = power_well->desc->is_tc_tbt;
 	bool timeout_expected;
-	u32 val;
 
 	icl_tc_port_assert_ref_held(dev_priv, power_well, dig_port);
 
-	val = intel_de_read(dev_priv, DP_AUX_CH_CTL(aux_ch));
-	val &= ~DP_AUX_CH_CTL_TBT_IO;
-	if (is_tbt)
-		val |= DP_AUX_CH_CTL_TBT_IO;
-	intel_de_write(dev_priv, DP_AUX_CH_CTL(aux_ch), val);
+	intel_de_rmw(dev_priv, DP_AUX_CH_CTL(aux_ch),
+		     DP_AUX_CH_CTL_TBT_IO, is_tbt ? DP_AUX_CH_CTL_TBT_IO : 0);
 
-	val = intel_de_read(dev_priv, regs->driver);
-	intel_de_write(dev_priv, regs->driver,
-		       val | HSW_PWR_WELL_CTL_REQ(i915_power_well_instance(power_well)->hsw.idx));
+	intel_de_rmw(dev_priv, regs->driver,
+		     0,
+		     HSW_PWR_WELL_CTL_REQ(i915_power_well_instance(power_well)->hsw.idx));
 
 	/*
 	 * An AUX timeout is expected if the TBT DP tunnel is down,
@@ -776,12 +754,8 @@ static void tgl_enable_dc3co(struct drm_i915_private *dev_priv)
 
 static void tgl_disable_dc3co(struct drm_i915_private *dev_priv)
 {
-	u32 val;
-
 	drm_dbg_kms(&dev_priv->drm, "Disabling DC3CO\n");
-	val = intel_de_read(dev_priv, DC_STATE_EN);
-	val &= ~DC_STATE_DC3CO_STATUS;
-	intel_de_write(dev_priv, DC_STATE_EN, val);
+	intel_de_rmw(dev_priv, DC_STATE_EN, DC_STATE_DC3CO_STATUS, 0);
 	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
 	/*
 	 * Delay of 200us DC3CO Exit time B.Spec 49196
@@ -820,8 +794,8 @@ void gen9_enable_dc5(struct drm_i915_private *dev_priv)
 
 	/* Wa Display #1183: skl,kbl,cfl */
 	if (DISPLAY_VER(dev_priv) == 9 && !IS_BROXTON(dev_priv))
-		intel_de_write(dev_priv, GEN8_CHICKEN_DCPR_1,
-			       intel_de_read(dev_priv, GEN8_CHICKEN_DCPR_1) | SKL_SELECT_ALTERNATE_DC_EXIT);
+		intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1,
+			     0, SKL_SELECT_ALTERNATE_DC_EXIT);
 
 	gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5);
 }
@@ -847,8 +821,8 @@ void skl_enable_dc6(struct drm_i915_private *dev_priv)
 
 	/* Wa Display #1183: skl,kbl,cfl */
 	if (DISPLAY_VER(dev_priv) == 9 && !IS_BROXTON(dev_priv))
-		intel_de_write(dev_priv, GEN8_CHICKEN_DCPR_1,
-			       intel_de_read(dev_priv, GEN8_CHICKEN_DCPR_1) | SKL_SELECT_ALTERNATE_DC_EXIT);
+		intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1,
+			     0, SKL_SELECT_ALTERNATE_DC_EXIT);
 
 	gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
 }
@@ -1149,18 +1123,14 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
 
 static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv)
 {
-	u32 val;
-
 	/*
 	 * On driver load, a pipe may be active and driving a DSI display.
 	 * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck
 	 * (and never recovering) in this case. intel_dsi_post_disable() will
 	 * clear it when we turn off the display.
 	 */
-	val = intel_de_read(dev_priv, DSPCLK_GATE_D(dev_priv));
-	val &= DPOUNIT_CLOCK_GATE_DISABLE;
-	val |= VRHUNIT_CLOCK_GATE_DISABLE;
-	intel_de_write(dev_priv, DSPCLK_GATE_D(dev_priv), val);
+	intel_de_rmw(dev_priv, DSPCLK_GATE_D(dev_priv),
+		     ~DPOUNIT_CLOCK_GATE_DISABLE, VRHUNIT_CLOCK_GATE_DISABLE);
 
 	/*
 	 * Disable trickle feed and enable pnd deadline calculation
@@ -1276,8 +1246,7 @@ static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
 	 * both PLLs disabled, or we risk losing DPIO and PLL
 	 * synchronization.
 	 */
-	intel_de_write(dev_priv, DPIO_CTL,
-		       intel_de_read(dev_priv, DPIO_CTL) | DPIO_CMNRST);
+	intel_de_rmw(dev_priv, DPIO_CTL, 0, DPIO_CMNRST);
 }
 
 static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
@@ -1289,8 +1258,7 @@ static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
 		assert_pll_disabled(dev_priv, pipe);
 
 	/* Assert common reset */
-	intel_de_write(dev_priv, DPIO_CTL,
-		       intel_de_read(dev_priv, DPIO_CTL) & ~DPIO_CMNRST);
+	intel_de_rmw(dev_priv, DPIO_CTL, DPIO_CMNRST, 0);
 
 	vlv_set_power_well(dev_priv, power_well, false);
 }
diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
index 1974eb580ed198..e9215ebcdfc44d 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
@@ -608,10 +608,8 @@ static void hsw_ddi_wrpll_disable(struct drm_i915_private *dev_priv,
 				  struct intel_shared_dpll *pll)
 {
 	const enum intel_dpll_id id = pll->info->id;
-	u32 val;
 
-	val = intel_de_read(dev_priv, WRPLL_CTL(id));
-	intel_de_write(dev_priv, WRPLL_CTL(id), val & ~WRPLL_PLL_ENABLE);
+	intel_de_rmw(dev_priv, WRPLL_CTL(id), WRPLL_PLL_ENABLE, 0);
 	intel_de_posting_read(dev_priv, WRPLL_CTL(id));
 
 	/*
@@ -626,10 +624,8 @@ static void hsw_ddi_spll_disable(struct drm_i915_private *dev_priv,
 				 struct intel_shared_dpll *pll)
 {
 	enum intel_dpll_id id = pll->info->id;
-	u32 val;
 
-	val = intel_de_read(dev_priv, SPLL_CTL);
-	intel_de_write(dev_priv, SPLL_CTL, val & ~SPLL_PLL_ENABLE);
+	intel_de_rmw(dev_priv, SPLL_CTL, SPLL_PLL_ENABLE, 0);
 	intel_de_posting_read(dev_priv, SPLL_CTL);
 
 	/*
@@ -1238,16 +1234,10 @@ static void skl_ddi_pll_write_ctrl1(struct drm_i915_private *dev_priv,
 				    struct intel_shared_dpll *pll)
 {
 	const enum intel_dpll_id id = pll->info->id;
-	u32 val;
 
-	val = intel_de_read(dev_priv, DPLL_CTRL1);
-
-	val &= ~(DPLL_CTRL1_HDMI_MODE(id) |
-		 DPLL_CTRL1_SSC(id) |
-		 DPLL_CTRL1_LINK_RATE_MASK(id));
-	val |= pll->state.hw_state.ctrl1 << (id * 6);
-
-	intel_de_write(dev_priv, DPLL_CTRL1, val);
+	intel_de_rmw(dev_priv, DPLL_CTRL1,
+		     DPLL_CTRL1_HDMI_MODE(id) | DPLL_CTRL1_SSC(id) | DPLL_CTRL1_LINK_RATE_MASK(id),
+		     pll->state.hw_state.ctrl1 << (id * 6));
 	intel_de_posting_read(dev_priv, DPLL_CTRL1);
 }
 
@@ -1265,8 +1255,7 @@ static void skl_ddi_pll_enable(struct drm_i915_private *dev_priv,
 	intel_de_posting_read(dev_priv, regs[id].cfgcr2);
 
 	/* the enable bit is always bit 31 */
-	intel_de_write(dev_priv, regs[id].ctl,
-		       intel_de_read(dev_priv, regs[id].ctl) | LCPLL_PLL_ENABLE);
+	intel_de_rmw(dev_priv, regs[id].ctl, 0, LCPLL_PLL_ENABLE);
 
 	if (intel_de_wait_for_set(dev_priv, DPLL_STATUS, DPLL_LOCK(id), 5))
 		drm_err(&dev_priv->drm, "DPLL %d not locked\n", id);
@@ -1285,8 +1274,7 @@ static void skl_ddi_pll_disable(struct drm_i915_private *dev_priv,
 	const enum intel_dpll_id id = pll->info->id;
 
 	/* the enable bit is always bit 31 */
-	intel_de_write(dev_priv, regs[id].ctl,
-		       intel_de_read(dev_priv, regs[id].ctl) & ~LCPLL_PLL_ENABLE);
+	intel_de_rmw(dev_priv, regs[id].ctl, LCPLL_PLL_ENABLE, 0);
 	intel_de_posting_read(dev_priv, regs[id].ctl);
 }
 
@@ -1902,14 +1890,11 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
 	bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
 
 	/* Non-SSC reference */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port));
-	temp |= PORT_PLL_REF_SEL;
-	intel_de_write(dev_priv, BXT_PORT_PLL_ENABLE(port), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL_ENABLE(port), 0, PORT_PLL_REF_SEL);
 
 	if (IS_GEMINILAKE(dev_priv)) {
-		temp = intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port));
-		temp |= PORT_PLL_POWER_ENABLE;
-		intel_de_write(dev_priv, BXT_PORT_PLL_ENABLE(port), temp);
+		intel_de_rmw(dev_priv, BXT_PORT_PLL_ENABLE(port),
+			     0, PORT_PLL_POWER_ENABLE);
 
 		if (wait_for_us((intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port)) &
 				 PORT_PLL_POWER_STATE), 200))
@@ -1918,39 +1903,28 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
 	}
 
 	/* Disable 10 bit clock */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL_EBB_4(phy, ch));
-	temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
-	intel_de_write(dev_priv, BXT_PORT_PLL_EBB_4(phy, ch), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL_EBB_4(phy, ch),
+		     PORT_PLL_10BIT_CLK_ENABLE, 0);
 
 	/* Write P1 & P2 */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL_EBB_0(phy, ch));
-	temp &= ~(PORT_PLL_P1_MASK | PORT_PLL_P2_MASK);
-	temp |= pll->state.hw_state.ebb0;
-	intel_de_write(dev_priv, BXT_PORT_PLL_EBB_0(phy, ch), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL_EBB_0(phy, ch),
+		     PORT_PLL_P1_MASK | PORT_PLL_P2_MASK, pll->state.hw_state.ebb0);
 
 	/* Write M2 integer */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 0));
-	temp &= ~PORT_PLL_M2_INT_MASK;
-	temp |= pll->state.hw_state.pll0;
-	intel_de_write(dev_priv, BXT_PORT_PLL(phy, ch, 0), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL(phy, ch, 0),
+		     PORT_PLL_M2_INT_MASK, pll->state.hw_state.pll0);
 
 	/* Write N */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 1));
-	temp &= ~PORT_PLL_N_MASK;
-	temp |= pll->state.hw_state.pll1;
-	intel_de_write(dev_priv, BXT_PORT_PLL(phy, ch, 1), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL(phy, ch, 1),
+		     PORT_PLL_N_MASK, pll->state.hw_state.pll1);
 
 	/* Write M2 fraction */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 2));
-	temp &= ~PORT_PLL_M2_FRAC_MASK;
-	temp |= pll->state.hw_state.pll2;
-	intel_de_write(dev_priv, BXT_PORT_PLL(phy, ch, 2), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL(phy, ch, 2),
+		     PORT_PLL_M2_FRAC_MASK, pll->state.hw_state.pll2);
 
 	/* Write M2 fraction enable */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 3));
-	temp &= ~PORT_PLL_M2_FRAC_ENABLE;
-	temp |= pll->state.hw_state.pll3;
-	intel_de_write(dev_priv, BXT_PORT_PLL(phy, ch, 3), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL(phy, ch, 3),
+		     PORT_PLL_M2_FRAC_ENABLE, pll->state.hw_state.pll3);
 
 	/* Write coeff */
 	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 6));
@@ -1961,15 +1935,11 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
 	intel_de_write(dev_priv, BXT_PORT_PLL(phy, ch, 6), temp);
 
 	/* Write calibration val */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 8));
-	temp &= ~PORT_PLL_TARGET_CNT_MASK;
-	temp |= pll->state.hw_state.pll8;
-	intel_de_write(dev_priv, BXT_PORT_PLL(phy, ch, 8), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL(phy, ch, 8),
+		     PORT_PLL_TARGET_CNT_MASK, pll->state.hw_state.pll8);
 
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 9));
-	temp &= ~PORT_PLL_LOCK_THRESHOLD_MASK;
-	temp |= pll->state.hw_state.pll9;
-	intel_de_write(dev_priv, BXT_PORT_PLL(phy, ch, 9), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL(phy, ch, 9),
+		     PORT_PLL_LOCK_THRESHOLD_MASK, pll->state.hw_state.pll9);
 
 	temp = intel_de_read(dev_priv, BXT_PORT_PLL(phy, ch, 10));
 	temp &= ~PORT_PLL_DCO_AMP_OVR_EN_H;
@@ -1986,9 +1956,7 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
 	intel_de_write(dev_priv, BXT_PORT_PLL_EBB_4(phy, ch), temp);
 
 	/* Enable PLL */
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port));
-	temp |= PORT_PLL_ENABLE;
-	intel_de_write(dev_priv, BXT_PORT_PLL_ENABLE(port), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL_ENABLE(port), 0, PORT_PLL_ENABLE);
 	intel_de_posting_read(dev_priv, BXT_PORT_PLL_ENABLE(port));
 
 	if (wait_for_us((intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port)) & PORT_PLL_LOCK),
@@ -2016,17 +1984,13 @@ static void bxt_ddi_pll_disable(struct drm_i915_private *dev_priv,
 					struct intel_shared_dpll *pll)
 {
 	enum port port = (enum port)pll->info->id; /* 1:1 port->PLL mapping */
-	u32 temp;
 
-	temp = intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port));
-	temp &= ~PORT_PLL_ENABLE;
-	intel_de_write(dev_priv, BXT_PORT_PLL_ENABLE(port), temp);
+	intel_de_rmw(dev_priv, BXT_PORT_PLL_ENABLE(port), PORT_PLL_ENABLE, 0);
 	intel_de_posting_read(dev_priv, BXT_PORT_PLL_ENABLE(port));
 
 	if (IS_GEMINILAKE(dev_priv)) {
-		temp = intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port));
-		temp &= ~PORT_PLL_POWER_ENABLE;
-		intel_de_write(dev_priv, BXT_PORT_PLL_ENABLE(port), temp);
+		intel_de_rmw(dev_priv, BXT_PORT_PLL_ENABLE(port),
+			     PORT_PLL_POWER_ENABLE, 0);
 
 		if (wait_for_us(!(intel_de_read(dev_priv, BXT_PORT_PLL_ENABLE(port)) &
 				  PORT_PLL_POWER_STATE), 200))
@@ -3641,8 +3605,8 @@ static void icl_dpll_write(struct drm_i915_private *dev_priv,
 			 !i915_mmio_reg_valid(div0_reg));
 	if (dev_priv->display.vbt.override_afc_startup &&
 	    i915_mmio_reg_valid(div0_reg))
-		intel_de_rmw(dev_priv, div0_reg, TGL_DPLL0_DIV0_AFC_STARTUP_MASK,
-			     hw_state->div0);
+		intel_de_rmw(dev_priv, div0_reg,
+			     TGL_DPLL0_DIV0_AFC_STARTUP_MASK, hw_state->div0);
 	intel_de_posting_read(dev_priv, cfgcr1_reg);
 }
 
@@ -3651,7 +3615,6 @@ static void icl_mg_pll_write(struct drm_i915_private *dev_priv,
 {
 	struct intel_dpll_hw_state *hw_state = &pll->state.hw_state;
 	enum tc_port tc_port = icl_pll_id_to_tc_port(pll->info->id);
-	u32 val;
 
 	/*
 	 * Some of the following registers have reserved fields, so program
@@ -3659,23 +3622,19 @@ static void icl_mg_pll_write(struct drm_i915_private *dev_priv,
 	 * during the calc/readout phase if the mask depends on some other HW
 	 * state like refclk, see icl_calc_mg_pll_state().
 	 */
-	val = intel_de_read(dev_priv, MG_REFCLKIN_CTL(tc_port));
-	val &= ~MG_REFCLKIN_CTL_OD_2_MUX_MASK;
-	val |= hw_state->mg_refclkin_ctl;
-	intel_de_write(dev_priv, MG_REFCLKIN_CTL(tc_port), val);
+	intel_de_rmw(dev_priv, MG_REFCLKIN_CTL(tc_port),
+		     MG_REFCLKIN_CTL_OD_2_MUX_MASK, hw_state->mg_refclkin_ctl);
 
-	val = intel_de_read(dev_priv, MG_CLKTOP2_CORECLKCTL1(tc_port));
-	val &= ~MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
-	val |= hw_state->mg_clktop2_coreclkctl1;
-	intel_de_write(dev_priv, MG_CLKTOP2_CORECLKCTL1(tc_port), val);
+	intel_de_rmw(dev_priv, MG_CLKTOP2_CORECLKCTL1(tc_port),
+		     MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK,
+		     hw_state->mg_clktop2_coreclkctl1);
 
-	val = intel_de_read(dev_priv, MG_CLKTOP2_HSCLKCTL(tc_port));
-	val &= ~(MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
-		 MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
-		 MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
-		 MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK);
-	val |= hw_state->mg_clktop2_hsclkctl;
-	intel_de_write(dev_priv, MG_CLKTOP2_HSCLKCTL(tc_port), val);
+	intel_de_rmw(dev_priv, MG_CLKTOP2_HSCLKCTL(tc_port),
+		     MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
+		     MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
+		     MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
+		     MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK,
+		     hw_state->mg_clktop2_hsclkctl);
 
 	intel_de_write(dev_priv, MG_PLL_DIV0(tc_port), hw_state->mg_pll_div0);
 	intel_de_write(dev_priv, MG_PLL_DIV1(tc_port), hw_state->mg_pll_div1);
@@ -3684,15 +3643,12 @@ static void icl_mg_pll_write(struct drm_i915_private *dev_priv,
 		       hw_state->mg_pll_frac_lock);
 	intel_de_write(dev_priv, MG_PLL_SSC(tc_port), hw_state->mg_pll_ssc);
 
-	val = intel_de_read(dev_priv, MG_PLL_BIAS(tc_port));
-	val &= ~hw_state->mg_pll_bias_mask;
-	val |= hw_state->mg_pll_bias;
-	intel_de_write(dev_priv, MG_PLL_BIAS(tc_port), val);
+	intel_de_rmw(dev_priv, MG_PLL_BIAS(tc_port),
+		     hw_state->mg_pll_bias_mask, hw_state->mg_pll_bias);
 
-	val = intel_de_read(dev_priv, MG_PLL_TDC_COLDST_BIAS(tc_port));
-	val &= ~hw_state->mg_pll_tdc_coldst_bias_mask;
-	val |= hw_state->mg_pll_tdc_coldst_bias;
-	intel_de_write(dev_priv, MG_PLL_TDC_COLDST_BIAS(tc_port), val);
+	intel_de_rmw(dev_priv, MG_PLL_TDC_COLDST_BIAS(tc_port),
+		     hw_state->mg_pll_tdc_coldst_bias_mask,
+		     hw_state->mg_pll_tdc_coldst_bias);
 
 	intel_de_posting_read(dev_priv, MG_PLL_TDC_COLDST_BIAS(tc_port));
 }
@@ -3766,11 +3722,7 @@ static void icl_pll_power_enable(struct drm_i915_private *dev_priv,
 				 struct intel_shared_dpll *pll,
 				 i915_reg_t enable_reg)
 {
-	u32 val;
-
-	val = intel_de_read(dev_priv, enable_reg);
-	val |= PLL_POWER_ENABLE;
-	intel_de_write(dev_priv, enable_reg, val);
+	intel_de_rmw(dev_priv, enable_reg, 0, PLL_POWER_ENABLE);
 
 	/*
 	 * The spec says we need to "wait" but it also says it should be
@@ -3785,11 +3737,7 @@ static void icl_pll_enable(struct drm_i915_private *dev_priv,
 			   struct intel_shared_dpll *pll,
 			   i915_reg_t enable_reg)
 {
-	u32 val;
-
-	val = intel_de_read(dev_priv, enable_reg);
-	val |= PLL_ENABLE;
-	intel_de_write(dev_priv, enable_reg, val);
+	intel_de_rmw(dev_priv, enable_reg, 0, PLL_ENABLE);
 
 	/* Timeout is actually 600us. */
 	if (intel_de_wait_for_set(dev_priv, enable_reg, PLL_LOCK, 1))
@@ -3815,8 +3763,7 @@ static void adlp_cmtg_clock_gating_wa(struct drm_i915_private *i915, struct inte
 	 * since TRANS_CMTG_CHICKEN is only accessible while DPLL0 is enabled.
 	 */
 	val = intel_de_read(i915, TRANS_CMTG_CHICKEN);
-	val = intel_de_read(i915, TRANS_CMTG_CHICKEN);
-	intel_de_write(i915, TRANS_CMTG_CHICKEN, DISABLE_DPT_CLK_GATING);
+	val = intel_de_rmw(i915, TRANS_CMTG_CHICKEN, ~0, DISABLE_DPT_CLK_GATING);
 	if (drm_WARN_ON(&i915->drm, val & ~DISABLE_DPT_CLK_GATING))
 		drm_dbg_kms(&i915->drm, "Unexpected flags in TRANS_CMTG_CHICKEN: %08x\n", val);
 }
@@ -3900,8 +3847,6 @@ static void icl_pll_disable(struct drm_i915_private *dev_priv,
 			    struct intel_shared_dpll *pll,
 			    i915_reg_t enable_reg)
 {
-	u32 val;
-
 	/* The first steps are done by intel_ddi_post_disable(). */
 
 	/*
@@ -3910,9 +3855,7 @@ static void icl_pll_disable(struct drm_i915_private *dev_priv,
 	 * nothing here.
 	 */
 
-	val = intel_de_read(dev_priv, enable_reg);
-	val &= ~PLL_ENABLE;
-	intel_de_write(dev_priv, enable_reg, val);
+	intel_de_rmw(dev_priv, enable_reg, PLL_ENABLE, 0);
 
 	/* Timeout is actually 1us. */
 	if (intel_de_wait_for_clear(dev_priv, enable_reg, PLL_LOCK, 1))
@@ -3920,9 +3863,7 @@ static void icl_pll_disable(struct drm_i915_private *dev_priv,
 
 	/* DVFS post sequence would be here. See the comment above. */
 
-	val = intel_de_read(dev_priv, enable_reg);
-	val &= ~PLL_POWER_ENABLE;
-	intel_de_write(dev_priv, enable_reg, val);
+	intel_de_rmw(dev_priv, enable_reg, PLL_POWER_ENABLE, 0);
 
 	/*
 	 * The spec says we need to "wait" but it also says it should be
diff --git a/drivers/gpu/drm/i915/display/intel_modeset_setup.c b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
index 96395bfbd41dfb..6f6dc7c6b88b0c 100644
--- a/drivers/gpu/drm/i915/display/intel_modeset_setup.c
+++ b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
@@ -647,17 +647,14 @@ static void intel_early_display_was(struct drm_i915_private *i915)
 	 * Also known as Wa_14010480278.
 	 */
 	if (IS_DISPLAY_VER(i915, 10, 12))
-		intel_de_write(i915, GEN9_CLKGATE_DIS_0,
-			       intel_de_read(i915, GEN9_CLKGATE_DIS_0) | DARBF_GATING_DIS);
+		intel_de_rmw(i915, GEN9_CLKGATE_DIS_0, 0, DARBF_GATING_DIS);
 
-	if (IS_HASWELL(i915)) {
-		/*
-		 * WaRsPkgCStateDisplayPMReq:hsw
-		 * System hang if this isn't done before disabling all planes!
-		 */
-		intel_de_write(i915, CHICKEN_PAR1_1,
-			       intel_de_read(i915, CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
-	}
+	/*
+	 * WaRsPkgCStateDisplayPMReq:hsw
+	 * System hang if this isn't done before disabling all planes!
+	 */
+	if (IS_HASWELL(i915))
+		intel_de_rmw(i915, CHICKEN_PAR1_1, 0, FORCE_ARB_IDLE_PLANES);
 
 	if (IS_KABYLAKE(i915) || IS_COFFEELAKE(i915) || IS_COMETLAKE(i915)) {
 		/* Display WA #1142:kbl,cfl,cml */
