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

The helper makes the code more compact and readable.
Signed-off-by: NAndrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230105131046.2173431-6-andrzej.hajda@intel.com

drivers/gpu/drm/i915/display/g4x_hdmi.c

@@ -273,8 +273,8 @@ static void cpt_enable_hdmi(struct intel_atomic_state *state,
 	 */
 
 	if (pipe_config->pipe_bpp > 24) {
-		intel_de_write(dev_priv, TRANS_CHICKEN1(pipe),
-			       intel_de_read(dev_priv, TRANS_CHICKEN1(pipe)) | TRANS_CHICKEN1_HDMIUNIT_GC_DISABLE);
+		intel_de_rmw(dev_priv, TRANS_CHICKEN1(pipe),
+			     0, TRANS_CHICKEN1_HDMIUNIT_GC_DISABLE);
 
 		temp &= ~SDVO_COLOR_FORMAT_MASK;
 		temp |= SDVO_COLOR_FORMAT_8bpc;
@@ -290,8 +290,8 @@ static void cpt_enable_hdmi(struct intel_atomic_state *state,
 		intel_de_write(dev_priv, intel_hdmi->hdmi_reg, temp);
 		intel_de_posting_read(dev_priv, intel_hdmi->hdmi_reg);
 
-		intel_de_write(dev_priv, TRANS_CHICKEN1(pipe),
-			       intel_de_read(dev_priv, TRANS_CHICKEN1(pipe)) & ~TRANS_CHICKEN1_HDMIUNIT_GC_DISABLE);
+		intel_de_rmw(dev_priv, TRANS_CHICKEN1(pipe),
+			     TRANS_CHICKEN1_HDMIUNIT_GC_DISABLE, 0);
 	}
 
 	drm_WARN_ON(&dev_priv->drm, pipe_config->has_audio &&

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

@@ -943,8 +943,7 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
 
 	repeater_ctl = intel_hdcp_get_repeater_ctl(dev_priv, cpu_transcoder,
 						   port);
-	intel_de_write(dev_priv, HDCP_REP_CTL,
-		       intel_de_read(dev_priv, HDCP_REP_CTL) & ~repeater_ctl);
+	intel_de_rmw(dev_priv, HDCP_REP_CTL, repeater_ctl, 0);
 
 	ret = hdcp->shim->toggle_signalling(dig_port, cpu_transcoder, false);
 	if (ret) {
@@ -1819,12 +1818,10 @@ static int hdcp2_enable_encryption(struct intel_connector *connector)
 	}
 
 	if (intel_de_read(dev_priv, HDCP2_STATUS(dev_priv, cpu_transcoder, port)) &
-	    LINK_AUTH_STATUS) {
+	    LINK_AUTH_STATUS)
 		/* Link is Authenticated. Now set for Encryption */
-		intel_de_write(dev_priv,
-			       HDCP2_CTL(dev_priv, cpu_transcoder, port),
-			       intel_de_read(dev_priv, HDCP2_CTL(dev_priv, cpu_transcoder, port)) | CTL_LINK_ENCRYPTION_REQ);
-	}
+		intel_de_rmw(dev_priv, HDCP2_CTL(dev_priv, cpu_transcoder, port),
+			     0, CTL_LINK_ENCRYPTION_REQ);
 
 	ret = intel_de_wait_for_set(dev_priv,
 				    HDCP2_STATUS(dev_priv, cpu_transcoder,
@@ -1848,8 +1845,8 @@ static int hdcp2_disable_encryption(struct intel_connector *connector)
 	drm_WARN_ON(&dev_priv->drm, !(intel_de_read(dev_priv, HDCP2_STATUS(dev_priv, cpu_transcoder, port)) &
 				      LINK_ENCRYPTION_STATUS));
 
-	intel_de_write(dev_priv, HDCP2_CTL(dev_priv, cpu_transcoder, port),
-		       intel_de_read(dev_priv, HDCP2_CTL(dev_priv, cpu_transcoder, port)) & ~CTL_LINK_ENCRYPTION_REQ);
+	intel_de_rmw(dev_priv, HDCP2_CTL(dev_priv, cpu_transcoder, port),
+		     CTL_LINK_ENCRYPTION_REQ, 0);
 
 	ret = intel_de_wait_for_clear(dev_priv,
 				      HDCP2_STATUS(dev_priv, cpu_transcoder,

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

@@ -238,15 +238,11 @@ static void g4x_read_infoframe(struct intel_encoder *encoder,
 			       void *frame, ssize_t len)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	u32 val, *data = frame;
+	u32 *data = frame;
 	int i;
 
-	val = intel_de_read(dev_priv, VIDEO_DIP_CTL);
-
-	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
-	val |= g4x_infoframe_index(type);
-
-	intel_de_write(dev_priv, VIDEO_DIP_CTL, val);
+	intel_de_rmw(dev_priv, VIDEO_DIP_CTL,
+		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 	for (i = 0; i < len; i += 4)
 		*data++ = intel_de_read(dev_priv, VIDEO_DIP_DATA);
@@ -314,15 +310,11 @@ static void ibx_read_infoframe(struct intel_encoder *encoder,
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	u32 val, *data = frame;
+	u32 *data = frame;
 	int i;
 
-	val = intel_de_read(dev_priv, TVIDEO_DIP_CTL(crtc->pipe));
-
-	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
-	val |= g4x_infoframe_index(type);
-
-	intel_de_write(dev_priv, TVIDEO_DIP_CTL(crtc->pipe), val);
+	intel_de_rmw(dev_priv, TVIDEO_DIP_CTL(crtc->pipe),
+		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 	for (i = 0; i < len; i += 4)
 		*data++ = intel_de_read(dev_priv, TVIDEO_DIP_DATA(crtc->pipe));
@@ -396,15 +388,11 @@ static void cpt_read_infoframe(struct intel_encoder *encoder,
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	u32 val, *data = frame;
+	u32 *data = frame;
 	int i;
 
-	val = intel_de_read(dev_priv, TVIDEO_DIP_CTL(crtc->pipe));
-
-	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
-	val |= g4x_infoframe_index(type);
-
-	intel_de_write(dev_priv, TVIDEO_DIP_CTL(crtc->pipe), val);
+	intel_de_rmw(dev_priv, TVIDEO_DIP_CTL(crtc->pipe),
+		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 	for (i = 0; i < len; i += 4)
 		*data++ = intel_de_read(dev_priv, TVIDEO_DIP_DATA(crtc->pipe));
@@ -472,15 +460,11 @@ static void vlv_read_infoframe(struct intel_encoder *encoder,
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	u32 val, *data = frame;
+	u32 *data = frame;
 	int i;
 
-	val = intel_de_read(dev_priv, VLV_TVIDEO_DIP_CTL(crtc->pipe));
-
-	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
-	val |= g4x_infoframe_index(type);
-
-	intel_de_write(dev_priv, VLV_TVIDEO_DIP_CTL(crtc->pipe), val);
+	intel_de_rmw(dev_priv, VLV_TVIDEO_DIP_CTL(crtc->pipe),
+		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 	for (i = 0; i < len; i += 4)
 		*data++ = intel_de_read(dev_priv,