AnsweredAssumed Answered

parallel lcd data offset

Question asked by Reuel Haavrahami on Jan 10, 2017
Latest reply on Jan 11, 2017 by Reuel Haavrahami



We have a parallel display (IPU0_D1) connected as follows:

D0 - to pin J25 (EIM_DA1__IPU1_DISP1_DATA08)........

D15 - to pin E25 (EIM_D27__IPU1_DISP1_DATA23).

Our kernel :Freescale i.MX Release Distro 3.14.52-1.1.1

The framebuffer is setup as RGB565. We can see the clock and sync signals. We can also see the high byte of the RGB signal on EIM_DA1__IPU1_DISP1_DATA08 through to DATA15. The upper byte is all zeros.

Clearly the system is outputting the RGB data on DATA0 to DATA15, but we need it on DATA8 to DATA23.

How do we have the IMX6 (Dual core) shift the RGB on the LCD interface by 8 bits?


It would seem possible to declare a framebuffer format similar to RGB565 with the a different .ofset for red, green and blue. However I am afraid that it might confuse overlay and other work done by the system on the framebuffer.