• Peng Fan's avatar
    video: mxsfb: introduce lcdif_power_down · a3c252d6
    Peng Fan authored
    Introudce a new function lcdif_power_down.
    
    1. Waits for a VSYNC interrupt to guarantee the reset is done at the
       VSYNC edge, which somehow makes the LCDIF consume the display FIFO(?)
       and helps the LCDIF work normally at the kernel stage.
    2. Add power down function to stop lcdif.
    
    The reason to introduce lcdif_power_down is that we want lcdif to be in
    initial state when doing uboot reset or before kernel boot to make
    system stable, otherwise system may hang.
    Signed-off-by: default avatarPeng Fan <Peng.Fan@freescale.com>
    Cc: Stefano Babic <sbabic@denx.de>
    Cc: Anatolij Gustschin <agust@denx.de>
    Acked-by: default avatarAnatolij Gustschin <agust@denx.de>
    a3c252d6
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