diff mbox series

[v3] drm/i915/display/power: use intel_de_rmw if possible

Message ID 20230217111836.864959-1-andrzej.hajda@intel.com (mailing list archive)
State New, archived
Headers show
Series [v3] drm/i915/display/power: use intel_de_rmw if possible | expand

Commit Message

Andrzej Hajda Feb. 17, 2023, 11:18 a.m. UTC 
The helper makes the code more compact and readable.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
v3:
    - just rebased
---
 .../drm/i915/display/intel_display_power.c    | 49 ++++-------
 .../i915/display/intel_display_power_well.c   | 82 ++++++-------------
 2 files changed, 39 insertions(+), 92 deletions(-)

Comments

Rodrigo Vivi Feb. 21, 2023, 8 p.m. UTC | #1 
On Fri, Feb 17, 2023 at 12:18:36PM +0100, Andrzej Hajda wrote:
> The helper makes the code more compact and readable.
> 
> Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

pushed, thanks

> ---
> v3:
>     - just rebased
> ---
>  .../drm/i915/display/intel_display_power.c    | 49 ++++-------
>  .../i915/display/intel_display_power_well.c   | 82 ++++++-------------
>  2 files changed, 39 insertions(+), 92 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
> index 7222502a760ccb..743b919bb2cfd7 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,
> @@ -1616,7 +1597,6 @@ 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);
>  
> @@ -1668,11 +1648,10 @@ 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 56a20bf5825b4a..6d1d3284eddd3a 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);
>  }
>  
> @@ -411,29 +405,22 @@ 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_port_is_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_port_is_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
> @@ -443,17 +430,12 @@ 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);
>  }
> @@ -515,19 +497,15 @@ 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,
> @@ -789,12 +767,8 @@ 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
> @@ -833,8 +807,8 @@ 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);
>  }
> @@ -860,8 +834,8 @@ 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);
>  }
> @@ -1162,18 +1136,14 @@ 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
> @@ -1289,8 +1259,7 @@ 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,
> @@ -1302,8 +1271,7 @@ 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);
>  }
> -- 
> 2.34.1
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 7222502a760ccb..743b919bb2cfd7 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,
@@ -1616,7 +1597,6 @@  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);
 
@@ -1668,11 +1648,10 @@  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 56a20bf5825b4a..6d1d3284eddd3a 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);
 }
 
@@ -411,29 +405,22 @@  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_port_is_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_port_is_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
@@ -443,17 +430,12 @@  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);
 }
@@ -515,19 +497,15 @@  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,
@@ -789,12 +767,8 @@  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
@@ -833,8 +807,8 @@  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);
 }
@@ -860,8 +834,8 @@  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);
 }
@@ -1162,18 +1136,14 @@  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
@@ -1289,8 +1259,7 @@  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,
@@ -1302,8 +1271,7 @@  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);
 }