drm/i915/display/misc: use intel_de_rmw if possible

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/20230110113656.4050491-1-andrzej.hajda@intel.com

drivers/gpu/drm/i915/display/g4x_dp.c

@@ -136,16 +136,12 @@ static void intel_dp_prepare(struct intel_encoder *encoder,
 
 		intel_dp->DP |= DP_PIPE_SEL_IVB(crtc->pipe);
 	} else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
-		u32 trans_dp;
-
 		intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
 
-		trans_dp = intel_de_read(dev_priv, TRANS_DP_CTL(crtc->pipe));
-		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
-			trans_dp |= TRANS_DP_ENH_FRAMING;
-		else
-			trans_dp &= ~TRANS_DP_ENH_FRAMING;
-		intel_de_write(dev_priv, TRANS_DP_CTL(crtc->pipe), trans_dp);
+		intel_de_rmw(dev_priv, TRANS_DP_CTL(crtc->pipe),
+			     TRANS_DP_ENH_FRAMING,
+			     drm_dp_enhanced_frame_cap(intel_dp->dpcd) ?
+			     TRANS_DP_ENH_FRAMING : 0);
 	} else {
 		if (IS_G4X(dev_priv) && pipe_config->limited_color_range)
 			intel_dp->DP |= DP_COLOR_RANGE_16_235;

drivers/gpu/drm/i915/display/intel_drrs.c

@@ -68,21 +68,15 @@ intel_drrs_set_refresh_rate_pipeconf(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum transcoder cpu_transcoder = crtc->drrs.cpu_transcoder;
-	u32 val, bit;
+	u32 bit;
 
 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		bit = PIPECONF_REFRESH_RATE_ALT_VLV;
 	else
 		bit = PIPECONF_REFRESH_RATE_ALT_ILK;
 
-	val = intel_de_read(dev_priv, PIPECONF(cpu_transcoder));
-
-	if (refresh_rate == DRRS_REFRESH_RATE_LOW)
-		val |= bit;
-	else
-		val &= ~bit;
-
-	intel_de_write(dev_priv, PIPECONF(cpu_transcoder), val);
+	intel_de_rmw(dev_priv, PIPECONF(cpu_transcoder),
+		     bit, refresh_rate == DRRS_REFRESH_RATE_LOW ? bit : 0);
 }
 
 static void

drivers/gpu/drm/i915/display/intel_dvo.c

@@ -444,11 +444,8 @@ static bool intel_dvo_init_dev(struct drm_i915_private *dev_priv,
 	 * the clock enabled before we attempt to initialize
 	 * the device.
 	 */
-	for_each_pipe(dev_priv, pipe) {
-		dpll[pipe] = intel_de_read(dev_priv, DPLL(pipe));
-		intel_de_write(dev_priv, DPLL(pipe),
-			       dpll[pipe] | DPLL_DVO_2X_MODE);
-	}
+	for_each_pipe(dev_priv, pipe)
+		dpll[pipe] = intel_de_rmw(dev_priv, DPLL(pipe), 0, DPLL_DVO_2X_MODE);
 
 	ret = dvo->dev_ops->init(&intel_dvo->dev, i2c);
 

drivers/gpu/drm/i915/display/intel_tv.c

@@ -930,8 +930,7 @@ intel_enable_tv(struct intel_atomic_state *state,
 	/* Prevents vblank waits from timing out in intel_tv_detect_type() */
 	intel_crtc_wait_for_next_vblank(to_intel_crtc(pipe_config->uapi.crtc));
 
-	intel_de_write(dev_priv, TV_CTL,
-		       intel_de_read(dev_priv, TV_CTL) | TV_ENC_ENABLE);
+	intel_de_rmw(dev_priv, TV_CTL, 0, TV_ENC_ENABLE);
 }
 
 static void
@@ -943,8 +942,7 @@ intel_disable_tv(struct intel_atomic_state *state,
 	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 
-	intel_de_write(dev_priv, TV_CTL,
-		       intel_de_read(dev_priv, TV_CTL) & ~TV_ENC_ENABLE);
+	intel_de_rmw(dev_priv, TV_CTL, TV_ENC_ENABLE, 0);
 }
 
 static const struct tv_mode *intel_tv_mode_find(const struct drm_connector_state *conn_state)