lvds 24 don't display kernel logo

俊宝胡 — Tue, 10 Nov 2015 08:26:54 GMT

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,

FB_VMODE_NONINTERLACED,

FB_MODE_IS_DETAILED,},

{

"LDB-XGA", 60, 1920,1080,9734,

220,25 ,

21, 10,

40, 10,

FB_VMODE_NONINTERLACED,

FB_MODE_IS_DETAILED,},

{

"LDB-1080P60", 60, 1920, 1080, 7692,

100, 40,

30, 3,

10, 2,

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!

Re: lvds 24 don't display kernel logo

igorpadykov — Mon, 23 Nov 2015 11:58:35 GMT

Hi yiyi

seems udoo LDB WXGA panel has similar characteristics, so one can look at

its integration on:

http://udoo.org/forum/threads/3-10-17-kernel.986/

http://udoo.org/forum/threads/guide-lvds-panel-set-up.843/

Best regards

igor

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i.MX Processorsのトピックlvds 24 don't display kernel logo

lvds 24 don't display kernel logo

Re: lvds 24 don't display kernel logo