SPI 驱动 ST7789VW 2.4 寸 LCD发生Label or path lcd_fb not found

[zhanweixin]

在V821的TINA-SDK里，参考链接文本适配2.4寸LCD
在board.dts树里定义如下：

&pio {
 	spi1_pins_default: spi1@0 {
		pins = "PD14", "PD15", "PD16"; /* CS, SCK, SDA */
		function = "spi1";
		allwinner,drive = <3>;
	};

	spi1_pins_hold: spi1@1 {
		pins = "PD18"; /* DC */
		function = "spi1_hold";
		allwinner,drive = <3>;
		bias-pull-up;
	};

	spi1_pins_sleep: spi1@2 {
		pins = "PD14", "PD15", "PD16", "PD18";
		function = "io_disabled";
	};
}；

&spi1 {
	pinctrl-0 = <&spi1_pins_default &spi1_pins_hold>;
	pinctrl-1 = <&spi1_pins_sleep>;
	pinctrl-names = "default", "sleep";
	clock-frequency = <100000000>;
	sunxi,spi-bus-mode = <SUNXI_SPI_BUS_DBI>;
	sunxi,spi-cs-mode = <SUNXI_SPI_CS_AUTO>;
	status = "okay";

	panel_st7789v_spi1: slave@0 {
		device_type = "spi-panel";
		compatible = "allwinner,spi-panel";
		reg = <0x0>;
		spi-max-frequency = <100000000>;
		lcd_used = <1>;
		lcd_driver_name = "st7789v";
		lcd_if = <0>;
		lcd_dbi_if = <2>;
		lcd_data_speed = <48>;
		lcd_x = <320>;
		lcd_y = <240>;
		lcd_pixel_fmt = <10>;
		lcd_dbi_fmt = <2>;
		lcd_rgb_order = <0>;
		lcd_width = <60>;
		lcd_height = <60>;
		lcd_pwm_used = <0>;
		lcd_pwm_ch = <6>;
		lcd_pwm_freq = <5000>;
		lcd_pwm_pol = <1>;
		lcd_frm = <1>;
		lcd_gamma_en = <1>;
		fb_buffer_num = <2>;
		lcd_backlight = <100>;
		lcd_fps = <60>;
		lcd_dbi_te = <0>;
		lcd_dbi_clk_mode = <0>;
		lcd_gpio_0 = <&pio PD 17 GPIO_ACTIVE_LOW>;
		status = "okay";
	};
};

&lcd_fb {
	status = "okay";
	port {
		#address-cells = <1>;
		#size-cells = <0>;
		spi_panel0: endpoint@0 {
			reg = <0>;
			remote-endpoint = <&panel_st7789v_spi1>;
		};
	};
};

但在编译过程中发生如下错误：

Nothing to do for unsupport configuration
make: Leaving directory '/data/V821/V821_SDK_V1.1/bsp/modules/gpu'
[ GPU]: Build done
---build dts for sun300iw1p1 v2w-----
INFO: Use die dtsi: /data/V821/V821_SDK_V1.1/bsp/configs/linux-5.4-ansc/sun300iw1p1.dtsi
Error: /data/V821/V821_SDK_V1.1/device/config/chips/v821/configs/v2w/board.dts:520.1-8 Label or path lcd_fb not found
FATAL ERROR: Syntax error parsing input tree
ERROR: build -j4 Failed
INFO: build kernel failed

如果在设备树里拿掉&lcd_fb { ... } 则可以编译通过，请问这是何故？

[zhanweixin]

通过分析错误日志，并结合阅读$SDK_PATH/bsp/configs/linux-5.4-ansc/sun300iw1p1.dtsi，
将板级board.dts里将&lcd_fb{ .... } 修正为&lcd_fb0{ .... }
该问题顺利解决

[awwwwa]

文档提供的驱动为新版本，需要更新，补丁如下，进入 bsp 文件夹打入：
0003-K1-sunxi-P2-lcd_fb-add-support-for-qspi-lcd.patch
0002-K1-sunxi-P2-lcd_fb-optimize-code-and-directory-struc.patch
0001-K1-sunxi-P2-disp-lcd_fb-fix-build-fail-when-enable-D.patch