Enable 1366x768 LVDS screen on MX53 LVDS 0, Android R10.3.1 -blog archive

shaojun_wang — Tue, 10 Jan 2012 09:37:53 GMT

1. Kernel change

diff --git a/drivers/video/mxc/ldb.c b/drivers/video/mxc/ldb.c

index 088d36a..b49ef28 100644

--- a/drivers/video/mxc/ldb.c

+++ b/drivers/video/mxc/ldb.c

@@ -123,6 +123,7 @@ struct fb_videomode mxcfb_ldb_modedb[] = {

FB_VMODE_NONINTERLACED,

FB_MODE_IS_DETAILED,},

+#if 0

{

"XGA", 60, 1024, 768, 15385,

220, 40,

@@ -131,6 +132,17 @@ struct fb_videomode mxcfb_ldb_modedb[] = {

FB_VMODE_NONINTERLACED,

FB_MODE_IS_DETAILED,},

+#endif

+ {

+ /* 1366x768 @ 60 Hz 162M pixel clk*/

+ //" WXGA", 60, 1366, 768, 13255, // 75.44MHz

+ "WXGA", 60, 1360, 768, 13255, // 75.44MHz

+ 190, 10, // 194

+ 30, 8, // 38

+ 65, 12,

+ 0,

+ FB_VMODE_NONINTERLACED,

+ FB_MODE_IS_DETAILED },

};

int mxcfb_ldb_modedb_sz = ARRAY_SIZE(mxcfb_ldb_modedb);

@@ -433,7 +445,7 @@ static int ldb_fb_pre_setup(struct fb_info *fbi)

{

int ipu_di = 0;

struct clk *di_clk, *ldb_clk_parent;

- unsigned long ldb_clk_prate = 455000000;

+ unsigned long ldb_clk_prate = 528080000;

fbi->mode = (struct fb_videomode *)fb_match_mode(&fbi->var,

&fbi->modelist);

This change is for 1366x760 screen.

Since IPU IC require the input/output width must be multiple of 8, so set the screen width to 1360, rather than 1366.

2. Android change

In init.freescale.rc, change setprop ro.AUTO_CONFIG_DISPLAY 1 to setprop ro.AUTO_CONFIG_DISPLAY 0

This change is for LVDS0.

3. U-boot command line change

console=ttymxc0 init=/init androidboot.console=ttymxc0 video=mxcdi0fb:RGB666,WXGA ldb=di0 di0_primary ip=dhcp gpu_nommu, gpu_memory=64M

topic Enable 1366x768 LVDS screen on MX53 LVDS 0, Android R10.3.1 -blog archive in i.MX Processors