DTS to selectively enable audio out for testing, and a DPI tweak. DO NOT MERGE.

Author: njhollinghurst

arch/arm/boot/dts/overlays/Makefile

@@ -3,6 +3,7 @@
 dtb-$(CONFIG_ARCH_BCM2835) += overlay_map.dtb hat_map.dtb README
 
 dtbo-$(CONFIG_ARCH_BCM2835) += \
+	test-rp1-audio-out.dtbo \
 	act-led.dtbo \
 	adafruit-st7735r.dtbo \
 	adafruit18.dtbo \

arch/arm/boot/dts/overlays/test-rp1-audio-out-overlay.dts

@@ -0,0 +1,17 @@
+/*
+ * test-rp1-audio-out-overlay.dts -- for testing, do not merge
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&rp1_audio_out>;
+		__overlay__ {
+			status = "ok";
+		};
+	};
+};

arch/arm64/boot/dts/broadcom/rp1.dtsi

@@ -804,6 +804,16 @@
 				       "gpio24", "gpio25";
 				bias-disable;
 			};
+			rp1_dpi_18bit_cpadhi_gpio1: rp1_dpi_18bit_cpadhi_gpio1 { /* Mode 6 with GPIO1(DEN) but not GPIO0 */
+				function = "dpi";
+				pins = "gpio1", "gpio2", "gpio3", "gpio4", "gpio5",
+				       "gpio6", "gpio7", "gpio8", "gpio9",
+				       "gpio12", "gpio13", "gpio14", "gpio15",
+				       "gpio16", "gpio17",
+				       "gpio20", "gpio21", "gpio22", "gpio23",
+				       "gpio24", "gpio25";
+				bias-disable;
+			};
 			rp1_dpi_24bit_gpio2: rp1_dpi_24bit_gpio2 { /* Mode 7 */
 				function = "dpi";
 				pins = "gpio2", "gpio3", "gpio4", "gpio5",