HI all
I meet some problem to display with dual lvds signal.
The screen resolution is 1920x1080 and finally display interlace. by write data to /dev/fb0 found some clues .
if i want draw a red line, which X axis=0, but it will display on X axis = 1.
if i want draw a read line, which X axis =1 , it will display on X axis = 0.
for(x = 0; x< height; x++){
draw vertical line which axis = X
}
the final display will be
1 0 3 2 5 4 7 6 ...... 1919 1918
| | | | | | | | ........ | |
| | | | | | | | ........ | |
| | | | | | | | ........ | |
| | | | | | | | ........ | |
has some parameter to fix it ?
Hi coin
there is no lvds on i.MX8M and it is necessary to use solution similar to
how to use ldb/lvds in android8 of imx8mq ?
Are you able to draw correctly using MX8-DSI-OLED1, described on
AN12189 MX8-DSI-OLED1 for i.MX 8M Evaluation Kit
https://www.nxp.com/docs/en/application-note/AN12189.pdf
Best regards
igor
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thanks for your reply.
I use tc358775 IC to convert mipi-dsi to lvds signal. our bottom board has a fpc connector with single lvds for 1280x800 screen and a 40-pin connector with dual lvds for 1920x1080 screen. the little screen with 1280x800 resolution works well, but the big screen display blurry.
so write a display test to draw line on the screen. found the reason but i do not know to to deal with it.
one can try patches provided on link (Aug 23, 2018 12:14 AM)
i.MX8M EVK MIPI CSI Camera Frame Rate
If this will not help suggest to proceed with NXP Professional Services | NXP
Best regards
igor
Thanks .
I tried to exchange LVDSA and LVDSB connection sequence , the odd and even also follow the exchange . it it work and display normal now.