v831刚上电没有log打印，到了kernel阶段才有

[cruise33]

正常来说，板子刚上电会类似有如下的打印：

但因为硬件没用到uart0，改成uart1后，到了kernel起来阶段，才有打印，而且烧录时也没有打印。请问这块的打印是在哪里控制？

查了些历史帖，都在讨论env.cfg、sys_config.fex、dts等

env.cfg部分内容如下

#kernel command arguments
earlyprintk=sunxi-uart,0x05000000
initcall_debug=0
console=ttyS1,115200
nand_root=/dev/ubiblock0_4
mmc_root=/dev/mmcblk0p4
nor_root=/dev/mtdblock2
init=/init
rdinit=/rdinit
loglevel=8
cma=4M
coherent_pool=16K

sys_config.fex如下：

[uart_para]
uart_debug_port = 1
uart_debug_tx   = port:PG06<5><1><default><default>
uart_debug_rx   = port:PG07<5><1><default><default>

;----------------------------------------------------------------------------------
;uart configuration
;uart_type ---  2 (2 wire), 4 (4 wire), 8 (8 wire, full function)
;----------------------------------------------------------------------------------
[uart1]
uart1_used       = 1
uart1_port       = 1
uart1_type       = 2
uart1_tx         = port:PG06<5><1><default><default>
uart1_rx         = port:PG07<5><1><default><default>

dts我直接改了sun8iw19p1-pinctrl.dsti：

			uart1_pins_a: uart1@0 {
				allwinner,pins = "PG6", "PG7";
				allwinner,pname = "uart1_tx", "uart1_rx";
				allwinner,function = "uart1";
				allwinner,muxsel = <5>;
				allwinner,drive = <1>;
				allwinner,pull = <1>;
			};

			uart1_pins_b: uart1@1 {
				allwinner,pins = "PG6", "PG7";
				allwinner,function = "io_disabled";
				allwinner,muxsel = <7>;
				allwinner,drive = <1>;
				allwinner,pull = <0>;
			};

原理图：

还有哪里没改对？

[WhycanService]

kernel要指定log的寄存器地址

make kernel_menuconfig 找到 Kernel low-level debugging functions，修改寄存器地址

[cruise33]

@whycanservice kernel加载阶段串口是有打印的，但板子刚上电时没有打印，也没有bootdelay的等待。“kernel指定log寄存器地址” 跟这个没关系吧？我也试了，没啥变化， debugging port也试过选成uart1，也没作用

[WhycanService]

@cruise33 uboot也需要修改，修改uart index

[cruise33]

@whycanservice 在 v831刚上电没有log打印，到了kernel阶段才有 中说：

@cruise33 uboot也需要修改，修改uart index

参考了这个精华帖
https://bbs.aw-ol.com/topic/1673/全志芯片tina-linux-修改-uart-引脚-uart端口?_=1679296875490

make kernel_menuconfig

env.cfg

earlyprintk=sunxi-uart,0x05000400
initcall_debug=0
console=ttyS1,115200

board.dts
（为啥用&uart1这个标签会编译不过 ）

soc@03000000 {
		uart@05000000 { 
			pinctrl-names = "default", "sleep";
			pinctrl-0 = <&uart0_pins_a>;
			pinctrl-1 = <&uart0_pins_b>; 
			status = "disabled";
		};
	
		/*&uart1*/
		uart@05000400 {  
			pinctrl-names = "default", "sleep";
			pinctrl-0 = <&uart1_pins_a>;
			pinctrl-1 = <&uart1_pins_b>;
			uart1_type = <2>;
			status = "okay";
		};
	
		pinctrl@0300b000 {
			uart1_pins_a: uart1@0 {
				allwinner,pins = "PG6", "PG7";
				allwinner,pname = "uart1_tx", "uart1_rx";
				allwinner,function = "uart1";
				allwinner,muxsel = <5>;
				allwinner,drive = <1>;
				allwinner,pull = <1>;
			};

			uart1_pins_b: uart1@1 {
				allwinner,pins = "PG6", "PG7";
				allwinner,function = "gpio_in";
			};

sun8iw19p1_nor_defconfig

CONFIG_SPECIFY_CONSOLE_INDEX=y
CONFIG_CONS_INDEX=2

还是只有如下开始的log :

BOOT0的打印 和烧录时的打印到底受哪里控制..