RK3568 開發(fā)板 Buildroot 環(huán)境下內核 Logo 動畫效果配置實操指南

原創(chuàng) 作者 Forlinx 2026-02-10 16:25:00 RK3568 RK3568開發(fā)板 Logo動畫效果
本文為 OK3568-C開發(fā)板（基于瑞芯微RK3568處理器設計） 4.19.206 Buildroot 環(huán)境下添加內核 Logo 動畫的實操指南，聚焦RK3568開發(fā)板啟動 Logo 動畫的完整實現流程。從動畫幀圖片的格式轉換與重命名，到文件部署至內核指定目錄，再到 Makefile、logo.c 等核心文件的配置修改，最后完成編譯驗證，步驟清晰且實操性強，按指引操作可實現 25 幀居中循環(huán)、每幀延時 50ms 的 Logo 動畫效果。 瑞芯微RK3568

一、準備工作：圖片格式轉換

需提前準備動畫所需的 連續(xù)序列圖片（建議 25 張，對應動畫幀 00-24），并按以下命令轉換為內核支持的 ppm 格式：

1.1 PNG格式轉換

若圖片為 PNG 格式，使用以下命令轉換： 

pngtopnm logo.png > logo.pnm

1.2 BMP格式轉換

若圖片為 BMP 格式，使用以下命令轉換： 

bmptopnm logo.bmp > logo.pnm

1.3 統(tǒng)一轉為224色ppm格式

將轉換后的圖片統(tǒng)一處理為內核支持的224色ppm格式： 

pnmquant 224 logo.pnm > logo224.pnm
pnmtoplainpnm logo224.pnm > logo_linuxXX_clut224.ppm
命名規(guī)范

XX 需替換為 00-24（對應 25 幀動畫，如 logo_linux00_clut224.ppm、logo_linux01_clut224.ppm）。

二、文件部署：拷貝至內核指定目錄

將轉換后的 25 張logo_linuxXX_clut224.ppm圖片，拷貝到內核源碼的 logo 驅動目錄：

內核logo目錄文件列表示意圖
圖1：內核logo目錄文件部署結構

OK3568-linux-source/kernel/drivers/video/logo/

三、配置修改：核心文件編輯

（一）修改 Makefile（編譯規(guī)則添加）

編輯 Makefile，添加新增圖片的編譯規(guī)則，確保 25 幀圖片被內核編譯：

OK3568-linux-source/kernel/drivers/video/logo/Makefile

Makefile修改示意圖
圖2：Makefile中添加25幀圖片編譯規(guī)則

（二）修改 logo.c（幀切換邏輯）

編輯 logo.c，修正語法錯誤并添加幀序列匹配邏輯：

OK3568-linux-source/kernel/drivers/video/logo/logo.c

drivers/video/logo/logo.c 
diff --git a/drivers/video/logo/logo.c b/drivers/video/logo/logo.c
index 36aa050f9..71ce3bade 100644
--- a/drivers/video/logo/logo.c
+++ b/drivers/video/logo/logo.c
@@ -43,6 +43,8 @@ late_initcall_sync(fb_logo_late_init);
 const struct linux_logo *fb_find_logo(int depth)
 {
 	const struct linux_logo *logo = NULL;
+	int num = depth >> 16;
+	depth &= 0xFFFF;
 	if (nologo || logos_freed)
 		return NULL;
@@ -72,7 +74,34 @@ const struct linux_logo *_ref fb_find_logo(int depth)
 	if (depth >= 8) {
 #ifdef CONFIG_LOGO_LINUX_CLUT224
 		/* Generic Linux Logo */
-		logo = &logo_linux_clut224;
+		// logo = &logo_linux_clut224;
+		switch (num) {
+		case 0: logo = &logo_linux00_clut224; break;
+		case 1: logo = &logo_linux01_clut224; break;
+		case 2: logo = &logo_linux02_clut224; break;
+		case 3: logo = &logo_linux03_clut224; break;
+		case 4: logo = &logo_linux04_clut224; break;
+		case 5: logo = &logo_linux05_clut224; break;
+		case 6: logo = &logo_linux06_clut224; break;
+		case 7: logo = &logo_linux07_clut224; break;
+		case 8: logo = &logo_linux08_clut224; break;
+		case 9: logo = &logo_linux09_clut224; break;
+		case 10: logo = &logo_linux10_clut224; break;
+		case 11: logo = &logo_linux11_clut224; break;
+		case 12: logo = &logo_linux12_clut224; break;
+		case 13: logo = &logo_linux13_clut224; break;
+		case 14: logo = &logo_linux14_clut224; break;
+		case 15: logo = &logo_linux15_clut224; break;
+		case 16: logo = &logo_linux16_clut224; break;
+		case 17: logo = &logo_linux17_clut224; break;
+		case 18: logo = &logo_linux18_clut224; break;
+		case 19: logo = &logo_linux19_clut224; break;
+		case 20: logo = &logo_linux20_clut224; break;
+		case 21: logo = &logo_linux21_clut224; break;
+		case 22: logo = &logo_linux22_clut224; break;
+		case 23: logo = &logo_linux23_clut224; break;
+		case 24: logo = &logo_linux24_clut224; break;
+		}
 #endif
 #ifdef CONFIG_LOGO_DEC_CLUT224
 		/* DEC Linux logo (on MIPS/MIPS64 or ALPHA) */

（三）修改 linux_logo.h（結構體聲明）

編輯 linux_logo.h，修正語法錯誤并聲明 25 幀圖片結構體：

OK3568-linux-source/kernel/include/linux/linux_logo.h

include/linux/linux_logo.h 
diff --git a/include/linux/linux_logo.h b/include/linux/linux_logo.h
index d4d5b93ef..b0ffc168b 100644
--- a/include/linux/linux_logo.h
+++ b/include/linux/linux_logo.h
@@ -35,7 +35,32 @@ struct linux_logo {
 extern const struct linux_logo logo_linux_mono;
 extern const struct linux_logo logo_linux_vga16;
-extern const struct linux_logo logo_linux_clut224;
+// extern const struct linux_logo logo_linux_clut224;
+extern const struct linux_logo logo_linux00_clut224;
+extern const struct linux_logo logo_linux01_clut224;
+extern const struct linux_logo logo_linux02_clut224;
+extern const struct linux_logo logo_linux03_clut224;
+extern const struct linux_logo logo_linux04_clut224;
+extern const struct linux_logo logo_linux05_clut224;
+extern const struct linux_logo logo_linux06_clut224;
+extern const struct linux_logo logo_linux07_clut224;
+extern const struct linux_logo logo_linux08_clut224;
+extern const struct linux_logo logo_linux09_clut224;
+extern const struct linux_logo logo_linux10_clut224;
+extern const struct linux_logo logo_linux11_clut224;
+extern const struct linux_logo logo_linux12_clut224;
+extern const struct linux_logo logo_linux13_clut224;
+extern const struct linux_logo logo_linux14_clut224;
+extern const struct linux_logo logo_linux15_clut224;
+extern const struct linux_logo logo_linux16_clut224;
+extern const struct linux_logo logo_linux17_clut224;
+extern const struct linux_logo logo_linux18_clut224;
+extern const struct linux_logo logo_linux19_clut224;
+extern const struct linux_logo logo_linux20_clut224;
+extern const struct linux_logo logo_linux21_clut224;
+extern const struct linux_logo logo_linux22_clut224;
+extern const struct linux_logo logo_linux23_clut224;
+extern const struct linux_logo logo_linux24_clut224;
 extern const struct linux_logo logo_dec_clut224;
 extern const struct linux_logo logo_mac_clut224;
 extern const struct linux_logo logo_parisc_clut224;

（四）修改 defconfig（內核配置啟用）

編輯 defconfig，啟用 Logo 功能（刪除冗余聲音配置）：

OK3568-linux-source/arch/arm64/configs/OK3568-C-linux_defconfig

arch/arm64/configs/OK3568-C-linux_defconfig 
diff --git a/arch/arm64/configs/OK3568-C-linux_defconfig b/arch/arm64/configs/OK3568-C-linux_defconfig
index 97d46ceff..d5af9f21d 100644
--- a/arch/arm64/configs/OK3568-C-linux_defconfig
+++ b/arch/arm64/configs/OK3568-C-linux_defconfig
@@ -590,3 +590,18 @@ CONFIG_RCU_CPU_STALL_TIMEOUT=60
 CONFIG_FUNCTION_TRACER=y
 CONFIG_BLK_DEV_IO_TRACE=y
 CONFIG_LKDTM=y
+
+#
+# Console display driver support
+#
+CONFIG_FONT_8x8=n
+CONFIG_VGA_CONSOLE=y
+CONFIG_DUMMY_CONSOLE=y
+CONFIG_DUMMY_CONSOLE_COLUMNS=80
+CONFIG_DUMMY_CONSOLE_ROWS=25
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
+# CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER is not set
+CONFIG_LOGO=y
+CONFIG_LOGO_LINUX_MONO=n
+CONFIG_LOGO_LINUX_VGA16=n
+CONFIG_LOGO_LINUX_CLUT224=y
配置項 說明
CONFIG_FRAMEBUFFER_CONSOLE=y 啟用幀緩沖控制臺
CONFIG_LOGO=y 啟用Logo顯示功能
CONFIG_LOGO_LINUX_CLUT224=y 啟用224色Linux Logo
CONFIG_LOGO_LINUX_MONO=n 禁用單色Logo
CONFIG_LOGO_LINUX_VGA16=n 禁用VGA16色Logo

（五）修改 fbcon.c（動畫播放邏輯）

編輯 fbcon.c，添加幀循環(huán)播放和延時邏輯：

OK3568-linux-source/kernel/drivers/video/fbdev/core/fbcon.c

drivers/video/fbdev/core/fbcon.c 
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index bf7959fdf..2607ac9cb 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -569,6 +569,7 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 	if (fb_get_color_depth(&info->var, &info->fix) == 1)
 		erase &= ~0x400;
 	logo_height = fb_prepare_logo(info, ops->rotate);
+	logo_height += (info->var.yres / 2) - (logo_height / 2); // 垂直居中
 	logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 	q = (unsigned short *) (vc->vc_origin +
 				vc->vc_size_row * rows);
@@ -2037,6 +2038,8 @@ static int fbcon_resize(struct vc_data *vc, unsigned int width,
 	return 0;
 }
 
+extern int fb_get_logo(struct fb_info *info, int num);
+
 static int fbcon_switch(struct vc_data *vc)
 {
 	struct fb_info *info, *old_info = NULL;
@@ -2158,7 +2161,14 @@ static int fbcon_switch(struct vc_data *vc)
 		logo_shown = fg_console;
 		/* This is protected above by initmem_freed */
-		fb_show_logo(info, ops->rotate);
+		// fb_show_logo(info, ops->rotate);
+#if 1
+		int i;
+		for (i = 0; i < 25; i++) { // 循環(huán)播放 25 幀 + fb_get_logo(info, i); + fb_show_logo(info, ops->rotate);
+			msleep(50); // 每幀延時 50ms，可調整動畫速度
+		}
+#endif
 		update_region(vc,
 			      vc->vc_origin + vc->vc_size_row * vc->vc_top,
 			      vc->vc_size_row * (vc->vc_bottom - vc->vc_top));
動畫參數調整

可通過修改msleep(50)的值來調整動畫播放速度，數值越小動畫越快，建議范圍 30-100ms。

（六）修改 fbmem.c（Logo 位置與函數導出）

編輯 fbmem.c，修正 Logo 顯示位置并導出 fb_get_logo 函數：

OK3568-linux-source/kernel/drivers/video/fbdev/core/fbmem.c

drivers/video/fbdev/core/fbmem.c 
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 7a70e7b80..63cfad4c0 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -509,10 +509,10 @@ static int fb_show_logo_line(struct fb_info *info, int rotate,
 		fb_set_logo(info, logo, logo_new, fb_logo.depth);
 	}
 
-	image.dx = 0;
-	image.dy = y;
 	image.width = logo->width;
 	image.height = logo->height;
+	image.dx = (info->var.xres / 2) - (logo->width / 2); // 水平居中
+	image.dy = (info->var.yres / 2) - (logo->height / 2); // 垂直居中
 
 	if (rotate) {
 		logo_rotate = kmalloc_array(logo->width, logo->height,
@@ -681,12 +681,25 @@ int fb_show_logo(struct fb_info *info, int rotate)
 	return y;
 }
 
+int fb_get_logo(struct fb_info *info, int num)
+{
+	int depth = fb_get_color_depth(&info->var, &info->fix);
+	depth |= num << 16; + fb_logo.logo = fb_find_logo(depth); + if (!fb_logo.logo) { + return -1; + } + return 0; +} #else int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } int fb_show_logo(struct fb_info *info, int rotate) { return 0; } +int fb_get_logo(struct fb_info *info, int num) { return 0; } #endif /* CONFIG_LOGO */ EXPORT_SYMBOL(fb_prepare_logo); EXPORT_SYMBOL(fb_show_logo); +EXPORT_SYMBOL(fb_get_logo);

（七）修改 bitblit.c（隱藏光標）

編輯 bitblit.c，禁用光標顯示避免影響動畫效果：

OK3568-linux-source/kernel/drivers/video/fbdev/core/bitblit.c

drivers/video/fbdev/core/bitblit.c 
diff --git a/drivers/video/fbdev/core/bitblit.c b/drivers/video/fbdev/core/bitblit.c
index 436365efa..e8e874653 100644
--- a/drivers/video/fbdev/core/bitblit.c
+++ b/drivers/video/fbdev/core/bitblit.c
@@ -373,7 +373,8 @@ static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 	if (info->fbops->fb_cursor)
 		err = info->fbops->fb_cursor(info, &cursor);
 
-	if (err)
+	// if (err) // 禁用軟光標
+	if (0)
 		soft_cursor(info, &cursor);
 
 	ops->cursor_reset = 0;

四、編譯驗證

完成所有修改后，執(zhí)行內核編譯命令，生成新的鏡像文件并燒錄到 RK3568 開發(fā)板，啟動開發(fā)板即可看到居中播放的 Logo 動畫（25 幀循環(huán)，每幀延時 50ms）。

編譯內核
執(zhí)行 make 命令編譯內核，生成 boot.img
燒錄鏡像
將編譯生成的鏡像燒錄到開發(fā)板
啟動驗證
重啟開發(fā)板，觀察開機Logo動畫效果
編譯參考

詳細編譯方法請參考飛凌嵌入式提供的《OK3568編譯手冊》。

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