drm/i915/display/panel: use intel_de_rmw if possible in panel related code

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>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230105131046.2173431-7-andrzej.hajda@intel.com

3 files changed, 37 insertions, 76 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_backlight.c b/drivers/gpu/drm/i915/display/intel_backlight.c
index ba0280131a5b..b64a988446a7 100644
--- a/drivers/gpu/drm/i915/display/intel_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_backlight.c
@@ -349,8 +349,7 @@ static void lpt_disable_backlight(const struct drm_connector_state *old_conn_sta
 		intel_de_write(i915, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
 	}
 
-	tmp = intel_de_read(i915, BLC_PWM_PCH_CTL1);
-	intel_de_write(i915, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
+	tmp = intel_de_rmw(i915, BLC_PWM_PCH_CTL1, BLM_PCH_PWM_ENABLE, 0);
 }
 
 static void pch_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val)
@@ -361,11 +360,9 @@ static void pch_disable_backlight(const struct drm_connector_state *old_conn_sta
 
 	intel_backlight_set_pwm_level(old_conn_state, val);
 
-	tmp = intel_de_read(i915, BLC_PWM_CPU_CTL2);
-	intel_de_write(i915, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
+	intel_de_rmw(i915, BLC_PWM_CPU_CTL2, BLM_PWM_ENABLE, 0);
 
-	tmp = intel_de_read(i915, BLC_PWM_PCH_CTL1);
-	intel_de_write(i915, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
+	tmp = intel_de_rmw(i915, BLC_PWM_PCH_CTL1, BLM_PCH_PWM_ENABLE, 0);
 }
 
 static void i9xx_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val)
@@ -380,8 +377,7 @@ static void i965_disable_backlight(const struct drm_connector_state *old_conn_st
 
 	intel_backlight_set_pwm_level(old_conn_state, val);
 
-	tmp = intel_de_read(i915, BLC_PWM_CTL2);
-	intel_de_write(i915, BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
+	tmp = intel_de_rmw(i915, BLC_PWM_CTL2, BLM_PWM_ENABLE, 0);
 }
 
 static void vlv_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val)
@@ -393,8 +389,7 @@ static void vlv_disable_backlight(const struct drm_connector_state *old_conn_sta
 
 	intel_backlight_set_pwm_level(old_conn_state, val);
 
-	tmp = intel_de_read(i915, VLV_BLC_PWM_CTL2(pipe));
-	intel_de_write(i915, VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
+	tmp = intel_de_rmw(i915, VLV_BLC_PWM_CTL2(pipe), BLM_PWM_ENABLE, 0);
 }
 
 static void bxt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val)
@@ -402,19 +397,14 @@ static void bxt_disable_backlight(const struct drm_connector_state *old_conn_sta
 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);
 	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	struct intel_panel *panel = &connector->panel;
-	u32 tmp;
 
 	intel_backlight_set_pwm_level(old_conn_state, val);
 
-	tmp = intel_de_read(i915, BXT_BLC_PWM_CTL(panel->backlight.controller));
-	intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),
-		       tmp & ~BXT_BLC_PWM_ENABLE);
+	intel_de_rmw(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),
+		     BXT_BLC_PWM_ENABLE, 0);
 
-	if (panel->backlight.controller == 1) {
-		val = intel_de_read(i915, UTIL_PIN_CTL);
-		val &= ~UTIL_PIN_ENABLE;
-		intel_de_write(i915, UTIL_PIN_CTL, val);
-	}
+	if (panel->backlight.controller == 1)
+		intel_de_rmw(i915, UTIL_PIN_CTL, UTIL_PIN_ENABLE, 0);
 }
 
 static void cnp_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val)
@@ -422,13 +412,11 @@ static void cnp_disable_backlight(const struct drm_connector_state *old_conn_sta
 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);
 	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	struct intel_panel *panel = &connector->panel;
-	u32 tmp;
 
 	intel_backlight_set_pwm_level(old_conn_state, val);
 
-	tmp = intel_de_read(i915, BXT_BLC_PWM_CTL(panel->backlight.controller));
-	intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),
-		       tmp & ~BXT_BLC_PWM_ENABLE);
+	intel_de_rmw(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),
+		     BXT_BLC_PWM_ENABLE, 0);
 }
 
 static void ext_pwm_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level)
@@ -478,7 +466,7 @@ static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state,
 	struct intel_connector *connector = to_intel_connector(conn_state->connector);
 	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	struct intel_panel *panel = &connector->panel;
-	u32 pch_ctl1, pch_ctl2, schicken;
+	u32 pch_ctl1, pch_ctl2;
 
 	pch_ctl1 = intel_de_read(i915, BLC_PWM_PCH_CTL1);
 	if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
@@ -487,21 +475,14 @@ static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state,
 		intel_de_write(i915, BLC_PWM_PCH_CTL1, pch_ctl1);
 	}
 
-	if (HAS_PCH_LPT(i915)) {
-		schicken = intel_de_read(i915, SOUTH_CHICKEN2);
-		if (panel->backlight.alternate_pwm_increment)
-			schicken |= LPT_PWM_GRANULARITY;
-		else
-			schicken &= ~LPT_PWM_GRANULARITY;
-		intel_de_write(i915, SOUTH_CHICKEN2, schicken);
-	} else {
-		schicken = intel_de_read(i915, SOUTH_CHICKEN1);
-		if (panel->backlight.alternate_pwm_increment)
-			schicken |= SPT_PWM_GRANULARITY;
-		else
-			schicken &= ~SPT_PWM_GRANULARITY;
-		intel_de_write(i915, SOUTH_CHICKEN1, schicken);
-	}
+	if (HAS_PCH_LPT(i915))
+		intel_de_rmw(i915, SOUTH_CHICKEN2, LPT_PWM_GRANULARITY,
+			     panel->backlight.alternate_pwm_increment ?
+			     LPT_PWM_GRANULARITY : 0);
+	else
+		intel_de_rmw(i915, SOUTH_CHICKEN1, SPT_PWM_GRANULARITY,
+			     panel->backlight.alternate_pwm_increment ?
+			     SPT_PWM_GRANULARITY : 0);
 
 	pch_ctl2 = panel->backlight.pwm_level_max << 16;
 	intel_de_write(i915, BLC_PWM_PCH_CTL2, pch_ctl2);
diff --git a/drivers/gpu/drm/i915/display/intel_pps.c b/drivers/gpu/drm/i915/display/intel_pps.c
index d255b92774ea..24b5b12f7732 100644
--- a/drivers/gpu/drm/i915/display/intel_pps.c
+++ b/drivers/gpu/drm/i915/display/intel_pps.c
@@ -1535,17 +1535,13 @@ static void pps_init_registers(struct intel_dp *intel_dp, bool force_disable_vdd
 	/*
 	 * Compute the divisor for the pp clock, simply match the Bspec formula.
 	 */
-	if (i915_mmio_reg_valid(regs.pp_div)) {
+	if (i915_mmio_reg_valid(regs.pp_div))
 		intel_de_write(dev_priv, regs.pp_div,
 			       REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) | REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
-	} else {
-		u32 pp_ctl;
-
-		pp_ctl = intel_de_read(dev_priv, regs.pp_ctrl);
-		pp_ctl &= ~BXT_POWER_CYCLE_DELAY_MASK;
-		pp_ctl |= REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000));
-		intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
-	}
+	else
+		intel_de_rmw(dev_priv, regs.pp_ctrl, BXT_POWER_CYCLE_DELAY_MASK,
+			     REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK,
+					    DIV_ROUND_UP(seq->t11_t12, 1000)));
 
 	drm_dbg_kms(&dev_priv->drm,
 		    "panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 2954759e9d12..a378b6e4aee8 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -152,7 +152,7 @@ static void psr_irq_control(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 	i915_reg_t imr_reg;
-	u32 mask, val;
+	u32 mask;
 
 	if (DISPLAY_VER(dev_priv) >= 12)
 		imr_reg = TRANS_PSR_IMR(intel_dp->psr.transcoder);
@@ -164,10 +164,7 @@ static void psr_irq_control(struct intel_dp *intel_dp)
 		mask |= psr_irq_post_exit_bit_get(intel_dp) |
 			psr_irq_pre_entry_bit_get(intel_dp);
 
-	val = intel_de_read(dev_priv, imr_reg);
-	val &= ~psr_irq_mask_get(intel_dp);
-	val |= ~mask;
-	intel_de_write(dev_priv, imr_reg, val);
+	intel_de_rmw(dev_priv, imr_reg, psr_irq_mask_get(intel_dp), ~mask);
 }
 
 static void psr_event_print(struct drm_i915_private *i915,
@@ -245,8 +242,6 @@ void intel_psr_irq_handler(struct intel_dp *intel_dp, u32 psr_iir)
 	}
 
 	if (psr_iir & psr_irq_psr_error_bit_get(intel_dp)) {
-		u32 val;
-
 		drm_warn(&dev_priv->drm, "[transcoder %s] PSR aux error\n",
 			 transcoder_name(cpu_transcoder));
 
@@ -260,9 +255,7 @@ void intel_psr_irq_handler(struct intel_dp *intel_dp, u32 psr_iir)
 		 * again so we don't care about unmask the interruption
 		 * or unset irq_aux_error.
 		 */
-		val = intel_de_read(dev_priv, imr_reg);
-		val |= psr_irq_psr_error_bit_get(intel_dp);
-		intel_de_write(dev_priv, imr_reg, val);
+		intel_de_rmw(dev_priv, imr_reg, 0, psr_irq_psr_error_bit_get(intel_dp));
 
 		schedule_work(&intel_dp->psr.work);
 	}
@@ -631,13 +624,10 @@ static void psr2_program_idle_frames(struct intel_dp *intel_dp,
 				     u32 idle_frames)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	u32 val;
 
 	idle_frames <<=  EDP_PSR2_IDLE_FRAME_SHIFT;
-	val = intel_de_read(dev_priv, EDP_PSR2_CTL(intel_dp->psr.transcoder));
-	val &= ~EDP_PSR2_IDLE_FRAME_MASK;
-	val |= idle_frames;
-	intel_de_write(dev_priv, EDP_PSR2_CTL(intel_dp->psr.transcoder), val);
+	intel_de_rmw(dev_priv, EDP_PSR2_CTL(intel_dp->psr.transcoder),
+		     EDP_PSR2_IDLE_FRAME_MASK, idle_frames);
 }
 
 static void tgl_psr2_enable_dc3co(struct intel_dp *intel_dp)
@@ -1125,19 +1115,13 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 
 	psr_irq_control(intel_dp);
 
-	if (intel_dp->psr.dc3co_exitline) {
-		u32 val;
-
-		/*
-		 * TODO: if future platforms supports DC3CO in more than one
-		 * transcoder, EXITLINE will need to be unset when disabling PSR
-		 */
-		val = intel_de_read(dev_priv, EXITLINE(cpu_transcoder));
-		val &= ~EXITLINE_MASK;
-		val |= intel_dp->psr.dc3co_exitline << EXITLINE_SHIFT;
-		val |= EXITLINE_ENABLE;
-		intel_de_write(dev_priv, EXITLINE(cpu_transcoder), val);
-	}
+	/*
+	 * TODO: if future platforms supports DC3CO in more than one
+	 * transcoder, EXITLINE will need to be unset when disabling PSR
+	 */
+	if (intel_dp->psr.dc3co_exitline)
+		intel_de_rmw(dev_priv, EXITLINE(cpu_transcoder), EXITLINE_MASK,
+			     intel_dp->psr.dc3co_exitline << EXITLINE_SHIFT | EXITLINE_ENABLE);
 
 	if (HAS_PSR_HW_TRACKING(dev_priv) && HAS_PSR2_SEL_FETCH(dev_priv))
 		intel_de_rmw(dev_priv, CHICKEN_PAR1_1, IGNORE_PSR2_HW_TRACKING,