Forum Post: How can I set vpss output to interlaced frame ?

Hi all,

I'm using AM3874 and ezsdk_5_05_01_04.

and trying to make frame at 44.9Mhz pixel clock, 1024x768 interlaced frame and 43fps (it's one of VESA timing)

My initializing vpss system was as below.

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modprobe vpss sbufaddr=0xBFB00000 mode=hdmi:1080i-43 i2c_mode=1 debug=1

modprobe ti81xxhdmi debug=1

echo 1:hdmi > /sys/devices/platform/vpss/graphics0/nodes

echo 0 > /sys/devices/platform/vpss/display0/enabled

echo 44900,1024/8/148/56,768/25/20/4,1 > /sys/devices/platform/vpss/display0/timings

echo triplediscrete,rgb888 > /sys/devices/platform/vpss/display0/output

echo 1 > /sys/devices/platform/vpss/display0/enabled

fbset -xres 1024 -yres 768 -vxres 1024 -vyres 768

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but it worked not interlaced but 1024x768p@44Hz 

how can I fix this problem?

Any help would be sincerely appreciated.

Luke