Hi, i have trouble on the kernel bootup .
i use lvds 24 screen on the sabresd board(YOCTO 3.10.17), on bootup,kernel logo dose't show the screen,it just a black screen.
howerver in linux-3.0.35(ltlib),it show normal.
arch/arm/boot/dts/imx6qdl-sabresd.dtsi
mxcfb1: fb@0 {
compatible = "fsl,mxc_sdc_fb";
disp_dev = "ldb";
interface_pix_fmt = "RGB24";
mode_str ="LDB-XGA";
default_bpp = <32>;
int_clk = <0>;
late_init = <0>;
status = "disabled";
};
driver/video/mxc/ldb.c
static struct fb_videomode ldb_modedb[] = {
{
"LDB-WXGA", 60, 1280, 800, 14065,
40, 40,
10, 3,
80, 10,
0,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,},
{
"LDB-XGA", 60, 1920,1080,9734,
220,25 ,
21, 10,
40, 10,
0,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,},
{
"LDB-1080P60", 60, 1920, 1080, 7692,
100, 40,
30, 3,
10, 2,
0,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,},
};
uboot set
setenv bootargs console=ttymxc0,115200 init=/init video=mxcfb0:dev=ldb,LDB-XGA,if=RGB24,bpp=32 ldb=sin0 video=mxcfb1:off video=mxcfb2:off fbmem=24M
help me ,thanks!
