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i.MX7D - EPD ED133UT2 - Display problems

Question asked by roberto pozzi on Aug 4, 2017
Latest reply on Nov 7, 2017 by Glen Fine
Branched from an earlier discussion
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Hello gusarambula,

my problem is a bit different:

just renaming the Firmware epdc_ED060XH2C1.fw supplied with the Sabre board to epdc_ED133UT2.fw and making the above modification to the Kernel 

static struct fb_videomode config2_mode = {
.name="ED133UT2",
......

everything works quite well

 

 Only if I run the test

mxc_epdc_v2_fb_test.out -n 18

some characters of the text have less contrast than the nearby ones.

 

Instead if I work with the correct fw file for ES133UT2 given to me by the local NXP FAE I have the following problems:

-At the boot the edpc display is cleared but the splash image is not drawn

-the splash image is drawn  the first time I run the  epdc test program or my epdc program

-the clear function doesn't work:each new image is superimposed on the previous one

-I changed the num_ce parameter (from 1 to 2,3..)but I did not see any improvements
-I tested different versions of the kernel (krogoth L4.1.15_2.0.1 and morty L4.1.15_2.1.0) but I obtaneid the same results: ES133UT2 working quite well with the wrong Firmware and not working with the correct one.
Best Regards,
Roberto Pozzi
 

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