BackMerge v5.1-rc5 into drm-next

Need rc5 for udl fix to add udl cleanups on top.

Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

@@ -1037,6 +1037,31 @@ void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_write);
 
+/* Filter out invalid setups to avoid configuring SCDC and scrambling */
+static bool dw_hdmi_support_scdc(struct dw_hdmi *hdmi)
+{
+	struct drm_display_info *display = &hdmi->connector.display_info;
+
+	/* Completely disable SCDC support for older controllers */
+	if (hdmi->version < 0x200a)
+		return false;
+
+	/* Disable if SCDC is not supported, or if an HF-VSDB block is absent */
+	if (!display->hdmi.scdc.supported ||
+	    !display->hdmi.scdc.scrambling.supported)
+		return false;
+
+	/*
+	 * Disable if display only support low TMDS rates and scrambling
+	 * for low rates is not supported either
+	 */
+	if (!display->hdmi.scdc.scrambling.low_rates &&
+	    display->max_tmds_clock <= 340000)
+		return false;
+
+	return true;
+}
+
 /*
  * HDMI2.0 Specifies the following procedure for High TMDS Bit Rates:
  * - The Source shall suspend transmission of the TMDS clock and data
@@ -1055,7 +1080,7 @@ void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi)
 	unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock;
 
 	/* Control for TMDS Bit Period/TMDS Clock-Period Ratio */
-	if (hdmi->connector.display_info.hdmi.scdc.supported) {
+	if (dw_hdmi_support_scdc(hdmi)) {
 		if (mtmdsclock > HDMI14_MAX_TMDSCLK)
 			drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 1);
 		else
@@ -1579,8 +1604,9 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
 
 	/* Set up HDMI_FC_INVIDCONF */
 	inv_val = (hdmi->hdmi_data.hdcp_enable ||
-		   vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
-		   hdmi_info->scdc.scrambling.low_rates ?
+		   (dw_hdmi_support_scdc(hdmi) &&
+		    (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
+		     hdmi_info->scdc.scrambling.low_rates)) ?
 		HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
 		HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
 
@@ -1646,7 +1672,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
 	}
 
 	/* Scrambling Control */
-	if (hdmi_info->scdc.supported) {
+	if (dw_hdmi_support_scdc(hdmi)) {
 		if (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
 		    hdmi_info->scdc.scrambling.low_rates) {
 			/*