Hi all, I'm trying to configure IPU on a iMX6 based platform by reading EDID from the external monitor.
Everything seem to work fine except for the pixelclock. In particular my monitor has a standard resolution of 1280x1024@60 (108 MHz pixelclock).
When the function ipu_init_sync_panel (file ipu_disp.c) is called it correctly receive 108 MHz as pixelclock. but during the execution of this function it gets rounded to 130 MHz.
I can see that the function calls clk_round_rate to round the clock to 130 MHz but it's not clear for me how it works.
Can someone please tell me how to get the exact pixelclock I would like to achieve? I've carefully read the iMX6 manual but it's not very useful in this case.
Another doubt that I have regards the field "ext_clk" of parameter "ipu_di_signal_cfg_t sig". In this case, is it better to set it or not?
Thanks Regards Luca