Dear all !
This video is the reaction of 1440x900 LVDS jitter
http://www.56.com/u17/v_MTM1Mjg2NDU0.html
Only 1440x900, the resolution will shake !
please help me !
已解决! 转到解答。
Hi li
one can try sightly change ldb module frequencies
(for example decrease fps). Also it may be caused
signal reflections (too strong signals), for that change
cable length and check board layout.
Best regards
igor
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static struct fb_videomode ldb_modedb[] = {
"LDB-1440P60", 60, 1440, 900, 9259,
240,10,//148, 88,
69, 10,
30, 8,
0
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,},
BOARD_KERNEL_CMDLINE := console=ttymxc0,115200 fb0base=0x27b00000 init=/init video=mxcfb0:dev=ldb,LDB-1440P60,if=RGB24,bpp=32 ldb=spl0 fbmem=28M video=mxcfb1:off video=mxcfb2:off vmalloc=450M androidboot.console=ttymxc0 androidboot.hardware=freescale
android 4.4.2 normal ! But Android 4.2.2 is not normal !
1080P is ok ! The following settings:
BOARD_KERNEL_CMDLINE := 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
{ |
"LDB-1080P60", 60, 1920, 1080, 6451,
240,0,//148, 88,
69, 0,
30, 8,
0,//FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, |
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,},
}
everything is ok !
I put the code to restore to the original state, also can appear such problem, I suspect that BSP does not support 1440x900 resolution !
When I did 1080P, android 4.2.2 everything is ok !but 1440x 900 is not good !