AnsweredAssumed Answered

IPU_INT_STAT_10 = 0x00080000 when unblank display

Question asked by ZC Tee on Jun 3, 2015
Latest reply on Jul 12, 2015 by ZC Tee

Hi all,

Currently I am facing a problem when interfacing a 1280x1024 LVDS LCD display to the i.mx6 SOLO.

We are using dual channel LVDS. LCD able to show after boot up without problem.

 

Problem happens when I try to 'unblank' the display after blanking it for screen sleep mode.

the display will be corrupted, with error message as below:

     imx-ipuv3 imx-ipuv3.0: IPU Error - IPU_INT_STAT_10 = 0x00080000

     imx-ipuv3 imx-ipuv3.0: IPU Error - IPU_INT_STAT_5 = 0x00800000

 

I trace the kernel code and see that in order to 'unblank' the display, it goes to mxc_ipuv3_fb.c --> mxcfb_blank: set the blank to FB_BLANK_UNBLANK. However I am not sure what causes it and how to solve it.

The display corrupt after 'unblanking' only happens for bigger display (currently tested is 1280x1024). for smaller display (800x480, 800x600), this problem does not happen.

 

Does anybody has any experience on this and can give me advise? Thank you.

I am using kernel version 3.0.35.

 

Regards,

ZC

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