Question

LK LOGO 到kernel LOGO 间有几秒的黑屏

Answer 1

UBoot logo切换到Kernel logo的时候
,会黑一下屏?
[DESCRIPTION]
UBoot logo切换到Kernel logo的时候,会黑一下屏
[SOLUTION]
通过修改mtkfb.c ,去掉刷黑屏的帧。
Code Path:mediatek/source/kernel/drivers/video/mtkfb.c
具体的修改方法如下:
一、在mtkfb_pan_display_impl方法前面定义变量:
static bool first_update = true;
static int cnt=3;
二、对mtkfb_pan_display_impl方法修改如下:
源码:
int ret = 0;
MTKFB_FUNC();
MSG_FUNC_ENTER();
修改为:
int ret = 0;
//Modify by mtk to avoid blackscreen
if(first_update){
first_update = false;
return ret;
}
if(0!=cnt){
printk("LCD:%dx%d\n",MTK_FB_XRES,MTK_FB_YRES);
cnt--;
}
//Modify by mtk to avoid blackscreen
MTKFB_FUNC();
MSG_FUNC_ENTER();