How to configure display on LVDS0 panel

[rajucm]

Hi all,

We got new version of hardware with imx6.

Here, LVDS0 ==(connected)==> ADV7123 to get RGB output.

Currently, we are able to see HDMI output

with bootargs=console=ttymxc0,115200 maxcpus=2 init=/init video=mxcfb0:dev=hdmi,720x480M@60,bpp=32 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc0 androidboot.hardware=freescale

But, We need display for LVDS0. Please suggest me command line for LVDS0 configuration and code changes...

do I need to make changes in /video/mxc/ldb.c & arch\arm\mach-mx6\board-mx6q_sabresd.c ?

Please suggest me.

Thanks,

Raju

[saurabh206]

Hi

Raju

You need to modified the boot args for video output to LVDS.

According to your required resolution you need modify the video/mxc/ldb.c

Thanks

Saurabh

[rajucm]

Hi Sourabh,

Thank you...

I tried command line following bootargs

setenv bootargs console=ttymxc0,115200 fb0base=0x27b00000 init=/init video=mxcfb0:dev=ldb,LDB-1080P60,if=RGB24,bpp=32 ldb=spl0 fbmem=28M,28M video=mxcfb1:dev=hdmi,1920x1080M@60,bpp=32 video=mxcfb2:off vmalloc=450M androidboot.console=ttymxc0 androidboot.hardware=freescale

@/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, 1024, 768, 15385,

     220, 40,

     21, 7,

     60, 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,},

    {

     "43wvf1g", 60, 800, 480, 30303,

     88, 40,

     32, 13,

     48, 3,

     0,

     FB_VMODE_NONINTERLACED,

     FB_MODE_IS_DETAILED,},

With above changes I can see HDMI working fine but still LVDS not working.    

Do we need some more changes?

Thanks,

Raju

[saurabh206]

Code change look ok.

Are you using Android or linux roofts?

[rajucm]

Hi sourabh,

we are using Android.....

I found little progress by with following commandline (LDB-1080P60 --to--> 43wvf1g).

setenv bootargs console=ttymxc0,115200 fb0base=0x27b00000 init=/init video=mxcfb0:dev=ldb,43wvf1g,if=RGB24,bpp=32 ldb=spl0 fbmem=28M,28M video=mxcfb1:dev=hdmi,1920x1080M@60,bpp=32 video=mxcfb2:off vmalloc=450M androidboot.console=ttymxc0 androidboot.hardware=freescale

Now, I am able to black screen (earlier no signal)...

Thanks

Raju

[rajucm]

Hi,

With above mentioned command line, I am getting either black or blue screen..

Do I need to change IPU id & Disp id?

static struct fsl_mxc_ldb_platform_data ldb_data = {

    .ipu_id = 0,

    .disp_id = 0,

    .ext_ref = 1,

    .mode = LDB_SIN0,

};

Please suggest me..

Thanks,

Raju