make kernel_menuconfig

Device Drivers  --->
    Character devices  --->
        [*]   Virtual terminal
    Graphics support  --->
        Frame buffer Devices  ---> 
            Video support for sunxi  --->
                 [*] Framebuffer Console Support(sunxi)
        Console display driver support  --->
Library routines  ---> 
    [*] Select compiled-in fonts

场景二：使用UART3，需要从UART0改为UART3（PB6，PB7）

1. 修改sys_config.fex（BOOT0与Uboot的串口）

sys_config.fex 的路径是 device/config/chips/t113/configs/evb1/sys_config.fex 中的 uart_debug_port

修改前：

[uart_para]
uart_debug_port = 0
uart_debug_tx   = port:PF02<3><1><default><default>
uart_debug_rx   = port:PF04<3><1><default><default>

修改后

[uart_para]
uart_debug_port = 3
uart_debug_tx   = port:PB06<7><1><default><default>
uart_debug_rx   = port:PB07<7><1><default><default>

2. 修改设备树（Linux使用的串口输出）

路径：device/config/chips/t113/configs/evb1/board.dts

修改前

uart3_pins_a: uart3_pins@0 {
	pins = "PC6", "PC7";
	function = "uart0";
	drive-strength = <10>;
	allwinner,muxsel = <4>;
	bias-pull-up;
};

uart3_pins_b: uart3_pins@1 {
	pins = "PC6", "PC7";
	function = "gpio_in";
};

&uart0 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart0_pins_a>;
	pinctrl-1 = <&uart0_pins_b>; 
	status = "okay"; 
};

&uart3 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart3_pins_a>;
	pinctrl-1 = <&uart3_pins_b>;
	status = "disabled"; 
};

修改后

uart3_pins_a: uart3_pins@0 {
	pins = "PB6", "PB7";
	function = "uart0";
	drive-strength = <10>;
	allwinner,muxsel = <7>;
	bias-pull-up;
};

uart3_pins_b: uart3_pins@1 {
	pins = "PB6", "PB7";
	function = "gpio_in";
};

&uart0 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart0_pins_a>;
	pinctrl-1 = <&uart0_pins_b>; 
	status = "disabled";                               # 关闭UART0
};

&uart3 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart3_pins_a>;
	pinctrl-1 = <&uart3_pins_b>;
	status = "okay";                                   # 开启UART3
};

3. 修改UBOOT CONSOLE INDEX

路径：brandy/brandy-2.0/u-boot-2018/configs/sun8iw20p1_defconfig
增加下列内容

CONFIG_SPECIFY_CONSOLE_INDEX=y
CONFIG_CONS_INDEX=4                            # UART 3+1 = 4 

4. 修改启动bootargs

路径：device/config/chips/t113/configs/evb1/env.cfg

修改前

earlyprintk=sunxi-uart,0x02500000
initcall_debug=0
console=ttyS0,115200

修改后
earlyprintk=sunxi-uart,0x02500000 需要修改为 UART3 的地址，查阅手册可知为 0x02500C00

earlyprintk=sunxi-uart,0x02500C00
initcall_debug=0
console=ttyS3,115200

注意 ARM 平台还需要设置Kernel，如下：

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

RISC-V 不需要此操作

YML 指定的 IMAGE_NV12 输入模式下，YUV 输入数据的方式是 Y,UV 分成两个文件送给验证程序，所以第一步，我们需要将 dog_416x416 图片转换为 YUV420 格式， 再拆分成两个文件

1. 转换

   我们使用 ffmpeg 将一张 416*416 的图片转换为 YUV ffmpeg -i dog_416x416.jpg -pix_fmt nv12 image_416x416.nv12.yuv

2. 将 Y 和 UV 平面分开，并分成两个文件按存储。 Y 和 UV 分 bin NV12 格式的大小，按理论计算，应该是 4164161.5=259584 字节。所以，Y 分量的大小应该为 4164161 = 173056, UV 分量大小为 86528。

分 Bin 我们使用 Linux 下的 dd 工具：

dd if=image_416x416.nv12.yuv of=Y.bin bs=1 count=173056
dd if=image_416x416.nv12.yuv of=UV.bin skip=173056 bs=1

仿真需要的数据也是要事先处理好的 Y.bin,UV.bin 作为参数，工具不帮忙给做

init 进程是内核启动的第一个用户进程，它根据配置文件决定启动那些程序，比如执行某些脚本、启动 shell、运行用户指定的程序等。init 进程是后续所有进程的发起者，比如init进程启动 /bin/sh 程序后，才能在控制台输入各种命令。

init进程的执行程序通常是在/sbin/init，上面讲述的 init 进程的作用只不过是 /sbin/init 这个程序的功能。我们完全可以编写自己的 /sbin/init 程序，或者传入命令行参数“init=xxxx”指定某个程序作为init进程运行。

tina系统中目前支持两种init程序：procd init 和 busybox init。下面我们来简单分析下kernel是如何调用第一个用户进程。

如上图所示，内核启动的第一个c语言入口函数为 start_kernel(), 在函数中：会设置与体系结构相关的环境变量，初始化控制台，以及挂载根文件系统，最后启动 init 进程。

其中的 run_init_process 函数使用它的参数所指定的程序来创建第一个用户进程。

（1）如果 ramdisk_execute_command 变量指定了要运行的程序，则启动它。
ramdisk_execute_command 的取值分三种情况，
1）如果命令行参数指定了“rdinit=xxx”，则ramdisk_execute_command等于这个参数指定的程序
2）否则，如果/init程序存在，ramdisk_execute_command就等于“/init”。
3）否则，ramdisk__execute_command为空
（2）如果execute_command变量指定了要运行的程序，启动它。
如果命令行参数指定了"init=..."，则execute_command等于这个参数指定的程序，否则为空
（3）如果 ramdisk_execute_command 和 execute_command 参数都没有指定，则依次执行 ”/sbin/init、/etc/init、/bin/init、/bin/sh“

在tina系统中，我们可以通过去修改env.cfg文件 ”rdinit=xxx“ 或 ”init=xxx“ 参数来指定启动的第一个用户进程

example：
tina/target/allwinner/azalea-m2ultra/configs下，修改env-3.10.cfg（如果没有这个文件，则到tina/target/allwinner/generic/configs/拷贝一份env-3.10.cfg到tina/target/allwinner/azalea-m2ultra/configs/），修改文件中的”init=‘指定的应用进程’ “即可

lichee/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp

做以下修改即可

diff --git a/de/disp_display.c b/de/disp_display.c
index 45cb431..e3261f2 100644
--- a/de/disp_display.c
+++ b/de/disp_display.c
@@ -1313,11 +1313,10 @@ s32 bsp_disp_lcd_set_panel_funs(char *name, disp_lcd_panel_fun *lcd_cfg)
 	}
 	/*now only support lcd0*/
 	num_compat_cnt = disp_get_compat_lcd_panel_num(0);
-	for (screen_id = 0; screen_id < num_compat_cnt; screen_id++) {
-		lcd = disp_get_lcd_compat(0, screen_id);
+	for (screen_id = 1; screen_id <= num_compat_cnt; screen_id++) {
+		lcd = disp_get_direct_lcd_compat(0, screen_id);
 		if (lcd && (lcd->set_panel_func)) {
 			if (!lcd->set_panel_func(lcd, name, lcd_cfg)) {
-				gdisp.lcd_registered[screen_id] = 1;
 				registered_cnt++;
 				DE_INF("panel driver %s register for compatible usage\n", name);
 			}
diff --git a/de/disp_lcd.c b/de/disp_lcd.c
index 6dc6447..afe600f 100644
--- a/de/disp_lcd.c
+++ b/de/disp_lcd.c
@@ -20,8 +20,8 @@ struct disp_lcd_private_data
 {
 	disp_lcd_flow             open_flow;
 	disp_lcd_flow             close_flow;
-	/*0 for using this panel, other for index of compat_panel*/
 	u32                       compat_panel_index;
+	u32                       switch_to_compat_panel_index;
 	disp_panel_para           panel_info;
 	panel_extend_para         panel_extend_info;
 	disp_lcd_cfg              lcd_cfg;
@@ -67,51 +67,66 @@ static void disp_lcd_post_disable_ex(unsigned int disp);
 s32 disp_lcd_set_bright(struct disp_device *lcd, u32 bright);
 s32 disp_lcd_get_bright(struct disp_device *lcd);
 int disp_update_lcd_param(int lcd_param_index);
-/*now only lcd0   index is the index for var lcds_compat*/
-struct disp_device *disp_get_lcd_compat(u32 disp, u32 index)
+
+static struct disp_lcd_private_data *disp_lcd_get_priv(struct disp_device *lcd)
 {
-	u32 num_compat;
-	u32 num_screens;
+	if (NULL == lcd) {
+		DE_WRN("param is NULL!\n");
+		return NULL;
+	}
 
+	return (struct disp_lcd_private_data *)lcd->priv_data;
+}
+
+struct disp_device *disp_get_direct_lcd_compat(u32 disp, u32 index)
+{
+	/*
+	 *    if g_compat_index is set, means not first boot, lcd_compat is NULL.
+	 * disp_lcd_compat_set_panel_funs may try to get lcd_compat, so return NULL
+	 * to prevent access NULL pointer.
+	 */
 	if (g_compat_index)
-		return NULL;/*  if g_compat_index is set, means not first boot, lcd_compat is NULL.
-			     * disp_lcd_compat_set_panel_funs may try to get lcd_compat, so return NULL.
-			     */
-	num_screens = bsp_disp_feat_get_num_screens();
-	num_compat = disp_get_compat_lcd_panel_num(0);
-	if (disp >= num_screens || !bsp_disp_feat_is_supported_output_types(disp, DISP_OUTPUT_TYPE_LCD)) {
-		DE_INF("disp %d not support lcd output\n", disp);
 		return NULL;
-	}
-	if (index >= num_compat) {
-		DE_INF("not find %d lcd_compatible param for disp%d \n", index, disp);
+	return &lcds_compat[index - 1];
+}
+/*now only lcd0   index is the index for var lcds_compat*/
+static struct disp_device *disp_get_lcd_compat(u32 disp, u32 index)
+{
+	static int count;
+	struct disp_lcd_private_data *lcd_compatp = &lcd_compat_private[index - 1];
+	u32 next_index = lcd_compatp->switch_to_compat_panel_index;
+	count++;
+	if (count > 100) {
+		DE_WRN("disp_get_lcd_compat endless loop ?\n");
 		return NULL;
 	}
-	return &lcds_compat[index];
+	if (next_index)
+		return disp_get_lcd_compat(disp, next_index);
+	else {
+		count = 0;
+		return &lcds_compat[index - 1];
+	}
 }
 
 struct disp_device* disp_get_lcd(u32 disp)
 {
-	u32 num_screens;
+	u32 num_screens = bsp_disp_feat_get_num_screens();
+	u32 num_compat = disp_get_compat_lcd_panel_num(0);
+	u32 index = ((struct disp_lcd_private_data *)(lcds[disp].priv_data))->switch_to_compat_panel_index;
 
-	num_screens = bsp_disp_feat_get_num_screens();
 	if (disp >= num_screens || !bsp_disp_feat_is_supported_output_types(disp, DISP_OUTPUT_TYPE_LCD)) {
 		DE_INF("disp %d not support lcd output\n", disp);
 		return NULL;
 	}
-	if (!((struct disp_lcd_private_data *)(lcds[disp].priv_data))->compat_panel_index)
-		return &lcds[disp];
-	else
-		return disp_get_lcd_compat(disp, (((struct disp_lcd_private_data *)(lcds[disp].priv_data))->compat_panel_index) - 1);
-}
-static struct disp_lcd_private_data *disp_lcd_get_priv(struct disp_device *lcd)
-{
-	if (NULL == lcd) {
-		DE_WRN("param is NULL!\n");
-		return NULL;
-	}
 
-	return (struct disp_lcd_private_data *)lcd->priv_data;
+	if (index) {
+		if (index > num_compat) {
+			DE_WRN("not find %d lcd_compatible param for disp%d \n", index, disp);
+			return NULL;
+		}
+		return disp_get_lcd_compat(disp, index);
+	} else
+		return &lcds[disp];
 }
 
 static s32 disp_lcd_is_used(struct disp_device* lcd)
@@ -869,6 +884,7 @@ static s32 lcd_clk_exit(struct disp_device* lcd)
 static s32 lcd_clk_config(struct disp_device* lcd)
 {
 	struct disp_lcd_private_data *lcdp = disp_lcd_get_priv(lcd);
+	disp_panel_para *panel = &lcdp->panel_info;
 	struct lcd_clk_info clk_info;
 	unsigned long pll_rate = 297000000, lcd_rate = 33000000, dclk_rate = 33000000, dsi_rate = 0;//hz
 	unsigned long pll_rate_set = 297000000, lcd_rate_set = 33000000, dclk_rate_set = 33000000, dsi_rate_set = 0;//hz
@@ -939,8 +955,19 @@ static s32 lcd_clk_config(struct disp_device* lcd)
 	dclk_rate_set = lcd_rate_set / clk_info.tcon_div;
 	if ((pll_rate_set != pll_rate) || (lcd_rate_set != lcd_rate)
 		|| (dclk_rate_set != dclk_rate)) {
-			DE_WRN("disp %d, clk: pll(%ld),clk(%ld),dclk(%ld) dsi_rate(%ld)\n     clk real:pll(%ld),clk(%ld),dclk(%ld) dsi_rate(%ld)\n",
-				lcd->disp, pll_rate, lcd_rate, dclk_rate, dsi_rate, pll_rate_set, lcd_rate_set, dclk_rate_set, dsi_rate_set);
+		/*  ajust the tcon_div to fix the real pll  */
+		if (pll_rate_set > pll_rate) {
+			panel->tcon_clk_div_ajust.clk_div_increase_or_decrease = INCREASE;
+			panel->tcon_clk_div_ajust.div_multiple = pll_rate_set / pll_rate;
+			dclk_rate_set /= panel->tcon_clk_div_ajust.div_multiple;
+		} else {
+			panel->tcon_clk_div_ajust.clk_div_increase_or_decrease = DECREASE;
+			panel->tcon_clk_div_ajust.div_multiple = pll_rate / pll_rate_set;
+			dclk_rate_set *= panel->tcon_clk_div_ajust.div_multiple;
+		}
+
+		DE_WRN("disp %d, clk: pll(%ld),clk(%ld),dclk(%ld) dsi_rate(%ld)\n     clk real:pll(%ld),clk(%ld),dclk(%ld) dsi_rate(%ld)\n",
+			lcd->disp, pll_rate, lcd_rate, dclk_rate, dsi_rate, pll_rate_set, lcd_rate_set, dclk_rate_set, dsi_rate_set);
 	}
 
 	return 0;
@@ -1889,8 +1916,11 @@ s32 disp_lcd_switch_compat_panel(struct disp_device *lcd, unsigned int index)
 	disp_lcd_post_disable_ex(lcd->disp);
 	lcd->exit(lcd);
 	lcdp = disp_lcd_get_priv(lcd);
-	lcdp->compat_panel_index = index;
-	lcd_compat = disp_get_lcd_compat(lcd->disp, index - 1);
+
+	/*this flag make disp_get_lcd get correct compat_panel*/
+	lcdp->switch_to_compat_panel_index = index;
+
+	lcd_compat = disp_get_lcd_compat(lcd->disp, index);
 	lcdp = disp_lcd_get_priv(lcd_compat);
 	lcdp->need_open_again = true;
 
@@ -51,7 +51,7 @@
 #endif
 
 struct disp_device *disp_get_lcd(u32 disp);
-struct disp_device *disp_get_lcd_compat(u32 disp, u32 index);
+struct disp_device *disp_get_direct_lcd_compat(u32 disp, u32 index);
 
 struct disp_device *disp_get_hdmi(u32 disp);
 
diff --git a/de/include.h b/de/include.h
index 57c5db6..5e81f37 100644
--- a/de/include.h
+++ b/de/include.h
@@ -658,6 +658,16 @@ enum disp_lcd_dsi_port {
 	DISP_LCD_DSI_DUAL_PORT,
 };
 
+enum div_flag {
+	 INCREASE        = 1,
+	 DECREASE        = -1,
+};
+
+struct clk_div_ajust {
+	enum div_flag clk_div_increase_or_decrease;
+	int div_multiple;
+};
+
 typedef struct {
 	disp_lcd_if              lcd_if;
 
@@ -737,6 +747,7 @@ typedef struct {
 	unsigned int            ccir_clk_div; /*not need to config for user*/
 	unsigned int            input_csc;
 	unsigned int lcd_hv_data_polarity;
+	struct clk_div_ajust tcon_clk_div_ajust;
 } disp_panel_para;
 
 typedef enum {
diff --git a/de/lowlevel_v2x/de_dsi.c b/de/lowlevel_v2x/de_dsi.c
index 6d629c5..3bb405d 100644
--- a/de/lowlevel_v2x/de_dsi.c
+++ b/de/lowlevel_v2x/de_dsi.c
@@ -454,8 +454,11 @@ s32 dsi_dcs_rd(u32 sel, u8 cmd, u8 *para_p, u32 *num_p)
 		count++;
 		dsi_delay_us(100);
 	}
-	if (count >= 50)
+	if (count >= 50) {
 		dsi_dev[sel]->dsi_basic_ctl0.bits.inst_st = 0;
+		dsi_dev[sel]->dsi_gctl.bits.dsi_en = 0;
+		dsi_dev[sel]->dsi_gctl.bits.dsi_en = 1;
+	}
 
 	if (dsi_dev[sel]->dsi_cmd_ctl.bits.rx_flag) {
 		if (dsi_dev[sel]->dsi_cmd_ctl.bits.rx_overflow)
@@ -920,7 +923,6 @@ static s32 dsi_basic_cfg(u32 sel, disp_panel_para *panel)
 		dsi_dev[sel]->dsi_trans_zero.bits.hs_zero_reduce_set = 0;
 	} else {
 		s32 start_delay = panel->lcd_vt - panel->lcd_y - 10;
-		u32 vfp = panel->lcd_vt - panel->lcd_y - panel->lcd_vbp;
 		u32 dsi_start_delay;
 
 		/*
@@ -928,8 +930,7 @@ static s32 dsi_basic_cfg(u32 sel, disp_panel_para *panel)
 		 * set ready sync early to dramfreq, so set start_delay 1
 		 */
 		start_delay = 1;
-
-		dsi_start_delay = panel->lcd_vt - vfp + start_delay;
+		dsi_start_delay = start_delay;
 		if (dsi_start_delay > panel->lcd_vt)
 			dsi_start_delay -= panel->lcd_vt;
 		if (dsi_start_delay == 0)
@@ -942,7 +943,7 @@ static s32 dsi_basic_cfg(u32 sel, disp_panel_para *panel)
 		    dsi_start_delay;
 		dsi_dev[sel]->dsi_basic_ctl1.bits.video_precision_mode_align =
 		    1;
-		dsi_dev[sel]->dsi_basic_ctl1.bits.video_frame_start = 0; /* 1 */
+		dsi_dev[sel]->dsi_basic_ctl1.bits.video_frame_start = 1;
 		dsi_dev[sel]->dsi_trans_start.bits.trans_start_set = 10;
 		dsi_dev[sel]->dsi_trans_zero.bits.hs_zero_reduce_set = 0;
 		dsi_dev[sel]->dsi_basic_ctl1.bits.dsi_mode = 1;
diff --git a/de/lowlevel_v2x/de_lcd_sun50iw10.c b/de/lowlevel_v2x/de_lcd_sun50iw10.c
index 203e8a3..5a4cdf6 100644
--- a/de/lowlevel_v2x/de_lcd_sun50iw10.c
+++ b/de/lowlevel_v2x/de_lcd_sun50iw10.c
@@ -393,7 +393,7 @@ s32 lvds_open(u32 sel, disp_panel_para *panel)
 #if defined(SUPPORT_COMBO_DPHY)
 		if (sel == 0) {
 			lvds_combphy_open(sel, panel);
-		} else {
+		} else if (sel < DEVICE_NUM) {
 			lcd_dev[sel]->tcon0_lvds_ana[0].bits.c = 2;
 			lcd_dev[sel]->tcon0_lvds_ana[0].bits.v = 3;
 			lcd_dev[sel]->tcon0_lvds_ana[0].bits.pd = 2;
@@ -774,6 +774,7 @@ static s32 tcon0_cfg_mode_tri(u32 sel, disp_panel_para *panel)
 {
 	u32 start_delay = 0;
 	u32 de_clk_rate = de_get_clk_rate() / 1000000;
+	u32 delay_line = 0;
 
 	de_clk_rate = (de_clk_rate == 0) ? 250 : de_clk_rate;
 
@@ -783,8 +784,30 @@ static s32 tcon0_cfg_mode_tri(u32 sel, disp_panel_para *panel)
 	lcd_dev[sel]->tcon0_cpu_tri1.bits.block_num = panel->lcd_y - 1;
 	lcd_dev[sel]->tcon0_cpu_tri2.bits.trans_start_mode = 0;
 	lcd_dev[sel]->tcon0_cpu_tri2.bits.sync_mode = 0;
-	start_delay = (panel->lcd_vt - panel->lcd_y - 8 - 1)
-	    * panel->lcd_ht * de_clk_rate / panel->lcd_dclk_freq / 8;
+
+	/**
+	 * When the blanking area of LCD is too small, the following formula is
+	 * not applicable, that calculates the start_ Delay is too large.
+	 *
+	 * The formula is
+	 * 		start_delay = (panel->lcd_vt - panel->lcd_y - 8 - 1)
+	 *    			* panel->lcd_ht * de_clk_rate / panel->lcd_dclk_freq / 8;
+	 *
+	 * Therefore, the following formula is obtained by balancing the
+	 * requirements of DE, TCON and PANEL modules for pixel data speed
+	 *
+	 */
+	if (panel->lcd_vbp > 10)
+		delay_line = 10;
+	else if (panel->lcd_vbp <= 10 && panel->lcd_vbp > 4)
+		delay_line = panel->lcd_vbp - 1;
+	else {
+		DE_WRN("vbp is too small, please readjust the timing parameters to increase vbp. \n");
+		delay_line = panel->lcd_vbp;
+	}
+
+	start_delay = delay_line * panel->lcd_ht * de_clk_rate / panel->lcd_dclk_freq / 8;
+
 	lcd_dev[sel]->tcon0_cpu_tri2.bits.start_delay = start_delay;
 
 	lcd_dev[sel]->tcon0_cpu_ctl.bits.trigger_fifo_en = 1;
diff --git a/de/lowlevel_v2x/disp_al.c b/de/lowlevel_v2x/disp_al.c
index 635db57..cf76927 100644
--- a/de/lowlevel_v2x/disp_al.c
+++ b/de/lowlevel_v2x/disp_al.c
@@ -746,10 +746,6 @@ int disp_al_lcd_get_clk_info(u32 screen_id, struct lcd_clk_info *info,
 	}
 #endif
 
-	if (panel->lcd_dclk_freq < 48 && panel->lcd_dclk_freq >= 3) {
-		tcon_div = 300 / panel->lcd_dclk_freq;
-	}
-
 	info->tcon_div = tcon_div;
 	info->lcd_div = lcd_div;
 	info->dsi_div = dsi_div;
@@ -773,6 +769,11 @@ int disp_al_lcd_cfg(u32 screen_id, disp_panel_para *panel,
 
 	tcon_init(screen_id);
 	disp_al_lcd_get_clk_info(screen_id, &info, panel);
+	if (panel->tcon_clk_div_ajust.clk_div_increase_or_decrease == INCREASE) {
+		info.tcon_div = info.tcon_div * panel->tcon_clk_div_ajust.div_multiple;
+	} else if (panel->tcon_clk_div_ajust.clk_div_increase_or_decrease == DECREASE) {
+		info.tcon_div = info.tcon_div / panel->tcon_clk_div_ajust.div_multiple;
+	}
 	tcon0_set_dclk_div(screen_id, info.tcon_div);
 
 #if !defined(TCON1_DRIVE_PANEL)
diff --git a/dev_disp.c b/dev_disp.c
index b850d96..1fcd080 100644
--- a/dev_disp.c
+++ b/dev_disp.c
@@ -992,6 +992,17 @@ long disp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	//----layer----
 	case DISP_LAYER_SET_CONFIG:
 	{
+
+		const unsigned int lyr_cfg_size = ARRAY_SIZE(lyr_cfg);
+
+		if (IS_ERR_OR_NULL((void __user *)ubuffer[1])) {
+			__wrn("incoming pointer of user is ERR or NULL");
+			return -EFAULT;
+		}
+		if (ubuffer[2] == 0 || ubuffer[2] > lyr_cfg_size) {
+			__wrn("layer number need to be set from 1 to %d\n", lyr_cfg_size);
+			return -EFAULT;
+		}
 		if (copy_from_user(lyr_cfg,
 			(void __user *)ubuffer[1],
 			sizeof(struct disp_layer_config) * ubuffer[2]))	{
@@ -1005,6 +1016,17 @@ long disp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 	case DISP_LAYER_GET_CONFIG:
 	{
+
+		const unsigned int lyr_cfg_size = ARRAY_SIZE(lyr_cfg);
+
+		if (IS_ERR_OR_NULL((void __user *)ubuffer[1])) {
+			__wrn("incoming pointer of user is ERR or NULL");
+			return -EFAULT;
+		}
+		if (ubuffer[2] == 0 || ubuffer[2] > lyr_cfg_size) {
+			__wrn("layer number need to be set from 1 to %d\n", lyr_cfg_size);
+			return -EFAULT;
+		}
 		if (copy_from_user(lyr_cfg,
 			(void __user *)ubuffer[1],
 			sizeof(struct disp_layer_config) * ubuffer[2]))	{
@@ -1026,6 +1048,17 @@ long disp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 	case DISP_LAYER_SET_CONFIG2:
 	{
+
+		const unsigned int lyr_cfg_size = ARRAY_SIZE(lyr_cfg2);
+
+		if (IS_ERR_OR_NULL((void __user *)ubuffer[1])) {
+			__wrn("incoming pointer of user is ERR or NULL");
+			return -EFAULT;
+		}
+		if (ubuffer[2] == 0 || ubuffer[2] > lyr_cfg_size) {
+			__wrn("layer number need to be set from 1 to %d\n", lyr_cfg_size);
+			return -EFAULT;
+		}
 		if (copy_from_user(lyr_cfg2,
 		    (void __user *)ubuffer[1],
 		    sizeof(struct disp_layer_config2) * ubuffer[2])) {
@@ -1040,6 +1073,17 @@ long disp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 	case DISP_LAYER_GET_CONFIG2:
 	{
+
+		const unsigned int lyr_cfg_size = ARRAY_SIZE(lyr_cfg2);
+
+		if (IS_ERR_OR_NULL((void __user *)ubuffer[1])) {
+			__wrn("incoming pointer of user is ERR or NULL");
+			return -EFAULT;
+		}
+		if (ubuffer[2] == 0 || ubuffer[2] > lyr_cfg_size) {
+			__wrn("layer number need to be set from 1 to %d\n", lyr_cfg_size);
+			return -EFAULT;
+		}
 		if (copy_from_user(lyr_cfg2,
 		    (void __user *)ubuffer[1],
 		    sizeof(struct disp_layer_config2) * ubuffer[2])) {
diff --git a/disp_sys_intf.c b/disp_sys_intf.c
index a8032b5..5afccf1 100644
--- a/disp_sys_intf.c
+++ b/disp_sys_intf.c
@@ -378,6 +378,7 @@ int disp_get_set_lcd_param_index_from_flash(bool is_set, int idx)
 			ret = -1;
 		}
 	} else {
+#ifdef CONFIG_COMPATIBLE_PANEL_RECORD
 #ifdef CONFIG_FAT_WRITE
 		if (idx < 0 || idx > 9) {
 			ret = -1;
@@ -399,6 +400,9 @@ int disp_get_set_lcd_param_index_from_flash(bool is_set, int idx)
 		pr_error("please enable FAT_WRITE for lcd compatible first\n");
 		ret = -1;
 #endif
+#else
+		ret = idx_get = idx;
+#endif
 }
 exit_free:
 	kfree(buf);
-- 

虚拟机

我们为您准备了一个配置好的可以开发 V853 的虚拟机，该虚拟机基于 Oracle VM VirtualBox 6.1.16 版本，配置四核4G内存，您可以根据您开发PC的性能修改虚拟机配置，建议您增大核心数以提到编译速度。

这个虚拟机是 开放虚拟机平台的OVA格式，支持导入 VirtualBox、VMWare 等虚拟机软件

虚拟机下载地址（大小：6GB）：https://netstorage.allwinnertech.com:5001/sharing/9mbFsvtuT

系统：Ubuntu 20.04，用户名：allwinner，密码：Pass123456

虚拟机配置的环境

• 编译 Tina Linux 所需的依赖
• Python 环境（NPU使用）
• 交叉编译工具链
• apt，pip配置了清华源

注：本虚拟机不包含 Tina Linux SDK 与 NPU 工具链，如需要请按照下面说明自行配置
Tina Linux SDK 源码下载：https://v853.docs.aw-ol.com/study/study_3getsdk/
NPU 开发部署工具：https://v853.docs.aw-ol.com/study/study_7npu_startup/

@memory

（1）如果ramdisk_execute_command变量指定了要运行的程序，则启动它。
          ramdisk_execute_command的取值分三种情况，
         1）如果命令行参数指定了“rdinit=xxx”，则ramdisk_execute_command等于这个参数指定的程序
         2）否则，如果/init程序存在，ramdisk_execute_command就等于“/init”。
         3）否则，ramdisk__execute_command为空
（2）如果execute_command变量指定了要运行的程序，启动它。
         如果命令行参数指定了"init=..."，则execute_command等于这个参数指定的程序，否则为空
（3）如果ramdisk_execute_command和execute_command参数都没有指定，则依次执行”/sbin/init、/etc/init、/bin/init、/bin/sh“

在tina系统中，我们可以通过去修改env.cfg文件”rdinit=xxx“或”init=xxx“参数来指定启动的第一个用户进程

busybox init 需要配置一些选项和 busybox-int-base-files这些东西

主要做这些修改

-CONFIG_SYSTEM_INIT_PROCD=y
-# CONFIG_SYSTEM_INIT_BUSYBOX is not set
+# CONFIG_SYSTEM_INIT_PROCD is not set
+CONFIG_SYSTEM_INIT_BUSYBOX=y
-CONFIG_PACKAGE_base-files=y
-# CONFIG_BUSYBOX_CONFIG_FEATURE_CALL_TELINIT is not set
-# CONFIG_BUSYBOX_CONFIG_INIT is not set
-# CONFIG_BUSYBOX_CONFIG_LINUXRC is not set
+CONFIG_BUSYBOX_CONFIG_INIT=y
+CONFIG_BUSYBOX_CONFIG_LINUXRC=y
+# CONFIG_BUSYBOX_CONFIG_FEATURE_USE_INITTAB is not set
+CONFIG_BUSYBOX_CONFIG_FEATURE_INIT_SCTTY=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_INIT_SYSLOG=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_INIT_QUIET=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_INIT_COREDUMPS=y
+CONFIG_BUSYBOX_CONFIG_INIT_TERMINAL_TYPE=""
+# CONFIG_BUSYBOX_CONFIG_FEATURE_INIT_MODIFY_CMDLINE is not set
-CONFIG_BUSYBOX_CONFIG_LOGGER=y
+# CONFIG_BUSYBOX_CONFIG_LOGGER is not set
+CONFIG_PACKAGE_busybox-init-base-files=y
+CONFIG_BUSYBOX_INIT_BASE_FILES_OPTIONS=y
+CONFIG_BUSYBOX_INIT_BASE_FILES_PATH="busybox-init-base-files"
+# CONFIG_BUSYBOX_INIT_BASE_FILES_RC_LOG is not set
+# CONFIG_BUSYBOX_INIT_BASE_FILES_RC_LOAD_SCRIPT is not set
+# CONFIG_BUSYBOX_INIT_BASE_FILES_RC_MODULES is not set
-CONFIG_PACKAGE_procd=y
-
-#
-# Configuration
-#
-# CONFIG_PROCD_SHOW_BOOT is not set
-# CONFIG_PROCD_ZRAM_TMPFS is not set
-# end of Configuration
-
+# CONFIG_PACKAGE_procd is not set

虚拟机安装说明

首先安装一个虚拟机软件，推荐 免费开源的 VirtualBox 虚拟机。当然也支持 VMWare WorkStation，ESXi 等虚拟机软件。这里以 VirtualBox 作为示例。

下载虚拟机文件，一个 Ubuntu20.04.ova 文件，双击打开它。

进入这个配置页面中，按图中所示配置虚拟机参数。

点击导入，开始导入（虚拟机较大，可能比较慢）

导入后启动即可

虚拟机使用说明

虚拟机安装好了，不过还需要配置下增强功能，例如主机与虚拟机文件的复制、共享文件夹、共享粘贴板等等。

我们先启动虚拟机，输入密码 Pass123456 进入系统。

到 设备 -> 安装增强功能 点击并安装增强功能。

点击 Run

输入密码 Pass123456

安装完成了，按回车

重启下虚拟机

设置共享粘贴板为双向、拖放双向

同时也可以设置一下共享文件夹

场景一：同样使用UART0，需要从PF2、PF4改到PE2、PE4

1. 修改sys_config.fex（BOOT0与Uboot的串口）

sys_config.fex 的路径是 device/config/chips/t113/configs/evb1/sys_config.fex 中的 uart_debug_port

修改前：

[uart_para]
uart_debug_port = 0
uart_debug_tx   = port:PF02<3><1><default><default>
uart_debug_rx   = port:PF04<3><1><default><default>

修改后

[uart_para]
uart_debug_port = 0
uart_debug_tx   = port:PE02<6><1><default><default>
uart_debug_rx   = port:PE03<6><1><default><default>

其中<3>改为<6> 是查阅数据手册中 PE2、PE3 的UART0是 Function6 得知的

port:PE02    <6><1><default><default>
        ^     ^
       PE2脚  引脚功能6（查阅datasheet得知）

2. 修改设备树（Linux使用的串口输出）

路径：device/config/chips/t113/configs/evb1/board.dts

修改前

uart0_pins_a: uart0_pins@0 {  /* For EVB1 board */
	pins = "PF2", "PF4";
	function = "uart0";
	drive-strength = <10>;
	allwinner,muxsel = <3>;
	bias-pull-up;
};

uart0_pins_b: uart0_pins@1 {  /* For EVB1 board */
	pins = "PF2", "PF4";
	function = "gpio_in";
};

修改后

uart0_pins_a: uart0_pins@0 {  /* For EVB1 board */
	pins = "PE2", "PE3";
	function = "uart0";
	drive-strength = <10>;
	allwinner,muxsel = <6>;
	bias-pull-up;
};

uart0_pins_b: uart0_pins@1 {  /* For EVB1 board */
	pins = "PE2", "PE3";
	function = "gpio_in";
};

@kelsey 写错了已修改

MIC3有AEC功能，默认好像启用AEC了，去源码里关了看看

@qq519472926 我记得还要勾选一个rstp server，才能编译通过

-20℃~ 110℃

参考数据手册：

参考 《D1-H_Linux_SPI_开发指南.pdf》

使用spidev并不需要专门设置compatible = "spidev";。而设置spidev会导致 spidev listed directly in DT 错误。这里使用的虚拟设备可以通过compatible = "rohm,dh2228fv"; 这样的 compatible 设备绕过检测

可用的spidev如下：

WARN参考spidev源码：

解压到openwrt/package下

fbviewer.tar.gz

请按照如下步骤依次验证是否配置正确

使用UART3，需要从UART0改为UART3（PB6，PB7）

1. 修改sys_config.fex（BOOT0与Uboot的串口）

sys_config.fex 的路径是 device/config/chips/t113/configs/evb1/sys_config.fex 中的 uart_debug_port

修改前：

[uart_para]
uart_debug_port = 0
uart_debug_tx   = port:PF02<3><1><default><default>
uart_debug_rx   = port:PF04<3><1><default><default>

修改后

[uart_para]
uart_debug_port = 0
uart_debug_tx   = port:PB06<7><1><default><default>
uart_debug_rx   = port:PB07<7><1><default><default>

2. 修改设备树（Linux使用的串口输出）

路径：device/config/chips/t113/configs/evb1/board.dts

修改前

uart3_pins_a: uart3_pins@0 {
	pins = "PC6", "PC7";
	function = "uart0";
	drive-strength = <10>;
	allwinner,muxsel = <4>;
	bias-pull-up;
};

uart3_pins_b: uart3_pins@1 {
	pins = "PC6", "PC7";
	function = "gpio_in";
};

&uart0 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart0_pins_a>;
	pinctrl-1 = <&uart0_pins_b>; 
	status = "okay"; 
};

&uart3 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart3_pins_a>;
	pinctrl-1 = <&uart3_pins_b>;
	status = "disabled"; 
};

修改后

uart3_pins_a: uart3_pins@0 {
	pins = "PB6", "PB7";
	function = "uart0";
	drive-strength = <10>;
	allwinner,muxsel = <7>;
	bias-pull-up;
};

uart3_pins_b: uart3_pins@1 {
	pins = "PB6", "PB7";
	function = "gpio_in";
};

&uart0 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart0_pins_a>;
	pinctrl-1 = <&uart0_pins_b>; 
	status = "disabled";                               # 关闭UART0
};

&uart3 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&uart3_pins_a>;
	pinctrl-1 = <&uart3_pins_b>;
	status = "okay";                                   # 开启UART3
};

3. 修改UBOOT CONSOLE INDEX

路径：brandy/brandy-2.0/u-boot-2018/configs/sun8iw20p1_defconfig
增加下列内容

CONFIG_SPECIFY_CONSOLE_INDEX=y
CONFIG_CONS_INDEX=4                            # UART 3+1 = 4 

4. 修改启动bootargs

路径：device/config/chips/t113/configs/evb1/env.cfg

修改前

earlyprintk=sunxi-uart,0x02500000
initcall_debug=0
console=ttyS0,115200

修改后
earlyprintk=sunxi-uart,0x02500000 需要修改为 UART3 的地址，查阅手册可知为 0x02500C00

earlyprintk=sunxi-uart,0x02500C00
initcall_debug=0
console=ttyS3,115200

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

注意 ARM 平台还需要设置Kernel，如下：

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

RISC-V 不需要此操作

（之前忘记说了，现在补上

@huangjun-zopudt 更新了mtd驱动，你可以试试全盘擦除再刷写

GUID Partition Table Header signature is wrong: 0x6F627464 != 0x5452415020494645
part_get_info_efi: *** ERROR: Invalid GPT ***
ERROR: attempting read past flash size
*** ERROR: Can't read GPT header ***
part_get_info_efi: *** ERROR: Invalid Backup GPT ***
[00.265]Loading Environment from SUNXI_FLASH... GUID Partition Table Header signature is wrong: 0x6F627464 != 0x5452415020494645
part_get_info_efi: *** ERROR: Invalid GPT ***
ERROR: attempting read past flash size
*** ERROR: Can't read GPT header ***
part_get_info_efi: *** ERROR: Invalid Backup GPT ***
*** Warning - no device, using default environment

系统分区损坏了。无法读取到fs里的文件。可以参考下这个是怎么写的 https://www.aw-ol.com/downloads/resources/72