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系统使用LVDS接口屏幕#xff0c;进入系统有些界面会闪#xff0c;图像抖动#xff1b; 二#xff0c;解决办法#xff1a;
1.调试
调节LCD0的LVDS电压幅度#xff0c;寄存器地址是0x06511220#xff08;具体是在User Manual中的LCD LVDS Ana…一问题现象
系统使用LVDS接口屏幕进入系统有些界面会闪图像抖动 二解决办法
1.调试
调节LCD0的LVDS电压幅度寄存器地址是0x06511220具体是在User Manual中的LCD LVDS Analog Register 0bit19:bit17控制差模电压大小bit10:bit8控制共模电压大小。
kernel调试命令
echo 0x06511220 /sys/class/sunxi_dump/dumpcat /sys/class/sunxi_dump/dump
echo 0x06511220 0xc1fe0320 /sys/class/sunxi_dump/write2.代码固化
参考如下,uboot和kernel都需要修改然后读取寄存器检查是否设置成功。
diff --git a/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/lowlevel_v2x/de_lcd.c b/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/lowlevel_v2x/de_lcd.c
index a8335b8072..493e654c64 100644
--- a/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/lowlevel_v2x/de_lcd.cb/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/lowlevel_v2x/de_lcd.c-380,10 380,10 s32 lvds_open(u32 sel, struct disp_panel_para *panel)if (sel 0)lvds_combphy_open(sel, panel);
#endif
- lcd_dev[sel]-tcon0_lvds_ana[0].bits.c 2;lcd_dev[sel]-tcon0_lvds_ana[0].bits.c 3;lcd_dev[sel]-tcon0_lvds_ana[0].bits.v 3;lcd_dev[sel]-tcon0_lvds_ana[0].bits.pd 2;
- lcd_dev[sel]-tcon0_lvds_ana[1].bits.c 2;lcd_dev[sel]-tcon0_lvds_ana[1].bits.c 3;lcd_dev[sel]-tcon0_lvds_ana[1].bits.v 3;lcd_dev[sel]-tcon0_lvds_ana[1].bits.pd 2;-414,10 414,10 s32 lvds_open(u32 sel, struct disp_panel_para *panel)if (sel 0)lvds_combphy_open(sel, panel);
#endif
- lcd_dev[sel]-tcon0_lvds_ana[0].bits.c 2;lcd_dev[sel]-tcon0_lvds_ana[0].bits.c 3;lcd_dev[sel]-tcon0_lvds_ana[0].bits.v 3;lcd_dev[sel]-tcon0_lvds_ana[0].bits.pd 2;
- lcd_dev[sel]-tcon0_lvds_ana[1].bits.c 2;lcd_dev[sel]-tcon0_lvds_ana[1].bits.c 3;lcd_dev[sel]-tcon0_lvds_ana[1].bits.v 3;lcd_dev[sel]-tcon0_lvds_ana[1].bits.pd 2; -445,6 445,7 s32 lvds_open(u32 sel, struct disp_panel_para *panel)
#if defined(SUPPORT_COMBO_DPHY)if (sel 0) {lvds_combphy_open(sel, panel);lcd_dev[sel]-tcon0_lvds_ana[0].bits.c 3;} else {lcd_dev[sel]-tcon0_lvds_ana[0].bits.c 2;lcd_dev[sel]-tcon0_lvds_ana[0].bits.v 3;-467,7 468,7 s32 lvds_open(u32 sel, struct disp_panel_para *panel)}
#else{
- lcd_dev[sel]-tcon0_lvds_ana[sel].bits.c 2;lcd_dev[sel]-tcon0_lvds_ana[sel].bits.c 3;lcd_dev[sel]-tcon0_lvds_ana[sel].bits.v 3;lcd_dev[sel]-tcon0_lvds_ana[sel].bits.pd 2;3. 检查
读取寄存器检查值是否为所设值
echo 0x06511220 /sys/class/sunxi_dump/dumpcat /sys/class/sunxi_dump/dump
