泰山派mipi3.1屏幕移植到合众恒跃rk3506

设备树HZ-RK3506_MiniEVM_MIPI3.1.dtsi

#include <dt-bindings/display/drm_mipi_dsi.h>
#include <dt-bindings/input/rk-input.h>
#include <dt-bindings/suspend/rockchip-rk3506.h>

&i2c0 {
	status = "okay";
	clock-frequency = <400000>;
	//pinctrl-0 = <&rm_io26_i2c0_scl &rm_io25_i2c0_sda>;
	pinctrl-0 = <&rm_io25_i2c0_scl
	&rm_io26_i2c0_sda>;
	myts@38 {
        compatible = "my,touch";
        reg = <0x38>;
        tp-size = <89>;
		tp-supply = <&vcc_sys>;
        max-x = <480>;
        max-y = <800>;
        touch-gpio = <&gpio1 RK_PB6 IRQ_TYPE_LEVEL_LOW>;
        reset-gpio = <&gpio1 RK_PB0 GPIO_ACTIVE_HIGH>;
    };

	GP7101@58 {
        compatible = "gp7101-backlight";
        reg = <0x58>;
		max-brightness-levels = <255>;
		default-brightness-level = <100>;
    };
};

&pinctrl {
	dsi {
		dsi_rst_gpio: dsi-rst-gpio {
			rockchip,pins = <0 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	myts{
		touch_gpio: touch-gpio {
			rockchip,pins = <1 RK_PB6 RK_FUNC_GPIO &pcfg_pull_up>;
		};
	};
};


&dsi {
	status = "okay";
	rockchip,lane-rate = <1000>;
	dsi_panel: panel@0 {
		status = "okay";
		compatible = "simple-panel-dsi";
        reset-gpios = <&gpio0 RK_PA1 GPIO_ACTIVE_LOW>;
		reg = <0>;
		backlight = <&backlight>;
		reset-delay-ms = <30>;
		enable-delay-ms = <100>;
		prepare-delay-ms = <20>;
		unprepare-delay-ms = <20>;
		disable-delay-ms = <20>;
		init-delay-ms = <120>;
		dsi,flags = <(MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
			      MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET)>;
		dsi,format = <MIPI_DSI_FMT_RGB888>;
		dsi,lanes  = <2>;
		panel-init-sequence = [
			// init code
			05 78 01 01
			05 78 01 11
			39 00 06 FF 77 01 00 00 11
			15 00 02 D1 11
			15 00 02 55 B0 // 80 90 b0
			39 00 06 FF 77 01 00 00 10
			39 00 03 C0 63 00
			39 00 03 C1 09 02
			39 00 03 C2 37 08
			15 00 02 C7 00 // x-dir rotate 0:0x00,rotate 180:0x04
			15 00 02 CC 38
			39 00 11 B0 00 11 19 0C 10 06 07 0A 09 22 04 10 0E 28 30 1C
			39 00 11 B1 00 12 19 0D 10 04 06 07 08 23 04 12 11 28 30 1C
			39 00 06 FF 77 01 00 00 11 // enable  bk fun of  command 2  BK1
			15 00 02 B0 4D
			15 00 02 B1 60 // 0x56  0x4a  0x5b
			15 00 02 B2 07
			15 00 02 B3 80
			15 00 02 B5 47
			15 00 02 B7 8A
			15 00 02 B8 21
			15 00 02 C1 78
			15 00 02 C2 78
			15 64 02 D0 88
			39 00 04 E0 00 00 02
			39 00 0C E1 01 A0 03 A0 02 A0 04 A0 00 44 44
			39 00 0D E2 00 00 00 00 00 00 00 00 00 00 00 00
			39 00 05 E3 00 00 33 33
			39 00 03 E4 44 44
			39 00 11 E5 01 26 A0 A0 03 28 A0 A0 05 2A A0 A0 07 2C A0 A0
			39 00 05 E6 00 00 33 33
			39 00 03 E7 44 44
			39 00 11 E8 02 26 A0 A0 04 28 A0 A0 06 2A A0 A0 08 2C A0 A0
			39 00 08 EB 00 01 E4 E4 44 00 40
			39 00 11 ED FF F7 65 4F 0B A1 CF FF FF FC 1A B0 F4 56 7F FF
			39 00 06 FF 77 01 00 00 00
			15 00 02 36 00 //U&D  Y-DIR rotate 0:0x00,rotate 180:0x10
			15 00 02 3A 55
			05 78 01 11
			05 14 01 29
		];

		panel-exit-sequence = [
			05 00 01 28
			05 00 01 10
		];

		disp_timings0: display-timings {
			native-mode = <&dsi_timing0>;
			dsi_timing0: timing0 {
				clock-frequency = <27000000>;
				hactive = <480>;   	
				vactive = <800>;   	 
				hfront-porch = <32>;  
				hsync-len = <4>;   	 
				hback-porch = <32>;  
				vfront-porch = <9>;  
				vsync-len = <4>;     
				vback-porch = <3>;   
				hsync-active = <0>;
				vsync-active = <0>;
				de-active = <0>;
				pixelclk-active = <0>;
			};
		};

		ports {
			#address-cells = <1>;
			#size-cells = <0>;

			port@0 {
				reg = <0>;
				panel_in_dsi: endpoint {
					remote-endpoint = <&dsi_out_panel>;
					status = "okay";
				};
			};
		};
	};

	ports {
		#address-cells = <1>;
		#size-cells = <0>;

		port@1 {
			reg = <1>;
			dsi_out_panel: endpoint {
				remote-endpoint = <&panel_in_dsi>;
			};
		};
	};
};


&display_subsystem {
	status = "okay";
	logo-memory-region = <&drm_logo>;
};

&vop {
	status = "okay";
};

&dsi_in_vop {
	status = "okay";
};

&rgb_in_vop {
	status = "disabled";
};

&route_dsi {
	status = "okay";
	//logo,rotate = <3>;
};

&route_rgb {
	status = "disabled";
};

&dsi_dphy {
	status = "okay";
};

&backlight {
	compatible = "pwm-backlight";
	pwms = <&pwm0_4ch_2 0 25000 0>;
	status = "okay";
};

驱动

其实设备树背光pwm节点没有用到，因为屏幕亮度通过I2C转pwm芯片来实现的(原因是3.1寸屏幕最大电流25ma，而泰山派板载背光驱动电路110ma,有烧毁风险)

I2C-->PWM-->SY7201ABC

触摸驱动使用的就是官方的驱动，my_touch.c和gp7101_bl.c,放到指定文件夹然后在对应的makefile加上使其编译进内核

屏幕显示kernel logo和开机log

CONFIG_FB=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_LOGO=y

还有就是uboot开机logo图片分辨率一定要与屏幕适配，否则报错