[BUG] dw-mipi-dsi-rockchip display corruption with dsi panel

[Peter Geis]

Good Evening,

I've been attempting to light off the feiyang fy07024di26a30d panel on
the rockpro64. This is the official panel from the Pine64 store.
I've confirmed it works with the downstream kernel on both the rk3399
and rk3566, but on the mainline driver the display is partially
corrupted (see attached photo: [1]).

As you can see, the left half of the display is fine, but the right half
of the display is corrupted with the pixels smearing horizontally.

I saw when the panel was added, some additional code was added to
handle burst mode in the sun6_mipi_dsi driver [2].
I've seen that the dw-mipi-dsi driver appears to already support burst
mode and I can't find anything out of place there.
I also haven't had much success finding anything obviously different in
the downstream driver vs the upstream driver that would explain this.

Attached below is the in-progress dts changes for an example of how the
panel is plugged in.

I admit, I have little understanding of the mipi-dsi internal workings,
so I'm reaching out to the experts on how to correct this.

Thank you for your time,
Peter Geis

[1] https://photos.app.goo.gl/LBA9M2WcweGaEb4cA
[2] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20181116163916.29621-1-jagan@amarulasolutions.com/

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
index 687a5afa5d2c..af55a30297ae 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
@@ -20,6 +20,13 @@ chosen {
 		stdout-path = "serial2:1500000n8";
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm0 0 1000000 0>;
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		default-brightness-level = <128>;
+	};
+
 	clkin_gmac: external-gmac-clock {
 		compatible = "fixed-clock";
 		clock-frequency = <125000000>;
@@ -69,7 +76,7 @@ diy_led: led-1 {
 
 	fan: pwm-fan {
 		compatible = "pwm-fan";
-		cooling-levels = <0 150 200 255>;
+		cooling-levels = <0 100 150 255>;
 		#cooling-cells = <2>;
 		fan-supply = <&vcc12v_dcin>;
 		pwms = <&pwm1 0 50000 0>;
@@ -220,6 +227,16 @@ vdd_log: vdd-log {
 		regulator-max-microvolt = <1700000>;
 		vin-supply = <&vcc5v0_sys>;
 	};
+
+	avdd: avdd {
+		compatible = "regulator-fixed";
+		regulator-name = "avdd";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <11000000>;
+		regulator-max-microvolt = <11000000>;
+		vin-supply = <&vcc3v3_s0>;
+	};
 };
 
 &cpu_l0 {
@@ -428,8 +445,8 @@ regulator-state-mem {
 
 			vcc3v0_touch: LDO_REG2 {
 				regulator-name = "vcc3v0_touch";
-				regulator-always-on;
-				regulator-boot-on;
+//				regulator-always-on;
+//				regulator-boot-on;
 				regulator-min-microvolt = <3000000>;
 				regulator-max-microvolt = <3000000>;
 				regulator-state-mem {
@@ -518,8 +535,8 @@ regulator-state-mem {
 
 			vcc3v3_s0: SWITCH_REG2 {
 				regulator-name = "vcc3v3_s0";
-				regulator-always-on;
-				regulator-boot-on;
+//				regulator-always-on;
+//				regulator-boot-on;
 				regulator-state-mem {
 					regulator-off-in-suspend;
 				};
@@ -593,6 +610,19 @@ fusb0: typec-portc at 22 {
 		vbus-supply = <&vcc5v0_typec>;
 		status = "okay";
 	};
+
+	touch: touchscreen at 5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		AVDD28-supply = <&vcc3v0_touch>;
+		VDDIO-supply = <&vcc3v0_touch>;
+		interrupt-parent = <&gpio4>;
+		interrupts = <RK_PD5 IRQ_TYPE_EDGE_FALLING>;
+		irq-gpios = <&gpio4 RK_PD5 GPIO_ACTIVE_HIGH>;
+		reset-gpios = <&gpio4 RK_PD6 GPIO_ACTIVE_HIGH>;
+//		touchscreen-inverted-x;
+//		touchscreen-inverted-y;
+	};
 };
 
 &i2s0 {
@@ -628,6 +658,88 @@ &io_domains {
 	gpio1830-supply = <&vcc_3v0>;
 };
 
+&mipi_dsi {
+	status = "okay";
+	clock-master;
+
+	ports {
+		mipi_out: port at 1 {
+			reg = <1>;
+
+			mipi_out_panel: endpoint {
+				remote-endpoint = <&mipi_in_panel>;
+			};
+		};
+	};
+
+	mipi_panel: panel at 0 {
+		compatible = "feiyang,fy07024di26a30d";
+		reg = <0>;
+		backlight = <&backlight>;
+		reset-gpios = <&gpio4 25 GPIO_ACTIVE_HIGH>;
+//		enable-gpios = <&gpio4 25 GPIO_ACTIVE_HIGH>;
+		width-mm = <154>;
+		height-mm = <86>;
+		rotation = <0>;
+		avdd-supply = <&avdd>;
+		dvdd-supply = <&vcc3v3_s0>;
+
+		display-timings {
+			native-mode = <&timing0>;
+			timing0: timing0 {
+				clock-frequency = <50000000>;
+				hactive = <1024>;
+				vactive = <600>;
+				hfront-porch = <160>;
+				hback-porch = <160>;
+				hsync-len = <10>;
+				vback-porch = <23>;
+				vfront-porch = <12>;
+				vsync-len = <1>;
+				hsync-active = <0>;
+				vsync-active = <0>;
+				pixelclk-active = <0>;
+				de-active = <0>;
+			};
+		};
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port at 0 {
+				reg = <0>;
+
+				mipi_in_panel: endpoint {
+					remote-endpoint = <&mipi_out_panel>;
+				};
+			};
+
+			port at 1 {
+				reg = <1>;
+
+				mipi1_in_panel: endpoint at 1 {
+					remote-endpoint = <&mipi1_out_panel>;
+				};
+			};
+		};
+	};
+};
+
+&mipi_dsi1 {
+	status = "okay";
+
+	ports {
+		mipi1_out: port at 1 {
+			reg = <1>;
+
+			mipi1_out_panel: endpoint {
+				remote-endpoint = <&mipi1_in_panel>;
+			};
+		};
+	};
+};
+
 &pcie0 {
 	ep-gpios = <&gpio2 RK_PD4 GPIO_ACTIVE_HIGH>;
 	num-lanes = <4>;