We have a custom LCD cape with a Beaglebone and Angstrom 3.2 branch.
The LCD display is shifted to the left, with the missing portion displayed on the right. I've tried all sorts of timing changes to "da8xx-fb.c" and "board-am335cevm.c" using numbers from Vesa Coordinated Timing spreadsheet and elsewhere but it doesn't seem to fix it, permanently. Sometimes its OK when I boot but when I reboot, its offset again.
How do I go about setting up the timing correctly? What is the reason for the offset?
Regards,
James
Here's what I've added to "da8xx-fb.c":-
[6] = {
.name = "AUO-G121XN01",
.width = 1024,
.height = 768,
.hfp = 24, //48, //80, //15, //48,
.hbp = 60, //80, //80, //15, //80,
.hsw = 136, //176, //32, //160, //160, //30, //32,
.vfp = 3, //3, //9, //3,
.vbp = 29, //15, //9, //15,
.vsw = 6, //4, //22, //20, //4,
.pxl_clk = 65000000,
.invert_pxl_clk = 0,
},
and this to "board-am335cevm.c":-
// we are being stupid and setting pixclock from here instead of da8xx-fb.c
if (conf_disp_pll(130000000)) {
pr_info("Failed to set pixclock to 130000000, not attempting to"
"register LCD cape\n");
}
