Dear Support-Team,
is it possible to handle a display with dual LVDS port (channel 1 for odd pixels/channel 2 for even pixels) on armstoneA9. And if yes, how.
Thanks for answers.
connector description see attachement.
Dual LVDS
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Yes, this is possible. In the device tree, e.g. armstonea9q.dts, you have the following setting:
Code- /*
- * Define this for a two-channel display, i.e. one display, one framebuffer,
- * but two LVDS channels, even pixels from one channel, odd pixels from the
- * other channel. Only define either DISPLAY_LVDS0 or DISPLAY_LVDS1 in this
- * case, using the full display resolution.
- */
- //#define CONFIG_ARMSTONEA9_LVDS_SPLIT_MODE
So just uncomment the define and then set the full resolution in your LVDS0 timings entry. That's it.
Your F&S Support Team
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OK, thanks. We will try.
Another question for creating the cable is: What channel is for odd pixels, what is for even pixels?
If we make a 1:1 cable, channel 0 will be odd and channel 1 will be even pixels (I would expect it the other way).
Who can tell us?
Thanks
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As far as I know, pixels are counted from zero, i.e. starting with an even pixel. Even pixels should be on LVDS channel 0 then, odd pixels on LVDS channel 1. If the result is still showing swapped channels at the end, I believe you can fix this by using LVDS1 as display device instead of LVDS0. Then the even and odd pixels should be swapped, too.
Your F&S Support Team
