i.MX6 Warning IPU_INT_STAT_10 = 0x00080000

[宗標廖]

Hello

Qiang Li

I am now working on i.MX6DL with L3.0.35, and when we are playing video,we got a warning

"imx-ipuv3 imx-ipuv3.0: IPU Warning - IPU_INT_STAT_10 = 0x00080000", when the waring occured,

it appeared some color lines above the video view.(Frequency is very low).

Though I found many similar issues in the community(includes Re: imx6 android 4.3.1 IPU error when system start),

I did not find a solution for me.According to page 3174 of the IMX6SDLRM,there is discription for bit19 as below,

This bit indicates on the interrupt that is a result of an error during access to a synchronous display via DI0.

So could you tell me what kinds of error can cause the interrupt? And could you give me some advice to resolve

this problem?

I attached the kernel config file, u-boot config file and u-boot env settings

Thank you!

Best Regards,

ZongbiaoLiao

Original Attachment has been moved to: KernelConfig.txt.zip

Original Attachment has been moved to: UbootConfig.h.txt.zip

Original Attachment has been moved to: UbootEnvirment.txt.zip

[zctee]

Hi QiangLi,

in mxc_ipuv3_fb.c, I tried to remove the below coding in the function mxcfb_blank:

switch (blank){

     case FB_BLANK_POWERDOWN:

     case FB_BLANK_VSYNC_SUSPEND:

     case FB_BLANK_HSYNC_SUSPEND:

     case FB_BLANK_NORMAL:

          if (mxc_fbi->dispdrv && mxc_fbi->dispdrv->drv->disable)

               mxc_fbi->dispdrv->drv->disable(mxc_fbi->dispdrv);

          ipu_disable_channel(mxc_fbi->ipu, mxc_fbi->ipu_ch, true);

          if (mxc_fbi->ipu_di >= 0)

               ipu_uninit_sync_panel(mxc_fbi->ipu, mxc_fbi->ipu_di);

          ipu_uninit_channel(mxc_fbi->ipu, mxc_fbi->ipu_ch);

          break;

     case FB_BLANK_UNBLANK:

          ret = mxcfb_set_par(info);

          break;

     }

I am expecting the screen to have no effect when i do blanking and unblanking as i remove the disable and enable of the IPU. However, when i do blanking, the screen will go black, and when i do unblanking, the screen will not return to the previous screen before blanking.

I think there is something else happening.. but i am not sure what is that. Can you advise?

Thank you.

Regards,

ZC

[qiang_li-mpu_se]

Except the mxcfb_blank() function, the blank/unblank event will also be handled in display device driver, such as ldb.c, ldb_fb_event().

So you code modification will impact the LVDS display initialization sequence.

[zctee]

Hi QiangLi,

Indeed it's related to the ldb_fb_event. i tried to disable the coding at the function and now the blanking doesn't take any effect. I will continue to probe into why is the error happening.

Regards,

ZC