imx-ipuv3 imx-ipuv3.0: DC stop timeout - 0 * 10ms

[pfsang]

hi, all

     i  encountered a problem about ipu.

     i'm porting linux on imx6 customized board.

     after power-on , it can display the linux log on lvds panel. it also can play video with gstreamer.

     but after several minutes, it displays nothing and just becomes Black-screen.

     it will show the following message on the console

-------------------------------------------------------------------------------

     imx-ipuv3 imx-ipuv3.0: DC stop timeout - 0 * 10ms

     mxc_ldb mxc_ldb: LDB blank, control reg:0x200

--------------------------------------------------------------------------------

     what's problem with it.?

[qiang_li-mpu_se · Accepted solution]

It is linux timeout to blank screen, you can add "consoleblank=0" in your boot command to avoid such timeout.

[igorpadykov]

Hi fang

"control reg:0x200" means that LDB was reset

and stopped (disabled). Many reasons may cause it:

DDR errors, power supply issues, just errors in software.

I would suggest to start with hardware and check LDB

with SDK (one can run it with jtag)

i.MX 6Series Platform SDK : Bare-metal SDK

Best regards

chip

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[pfsang]

hi, chipexpert

       Does "power supply issues" means that pmic will also cause the error?

      and to i.MX 6Series Platform SDK : Bare-metal SDK ,

       how to test it with it ?

      i found the ips_test.c in iMX6_Platform_SDK\sdk\drivers\ipu\test.

      is this test file?

B&R

peter

[igorpadykov]

Hi fang

yes pmic also can reset LDB.

For SDK, first please read documentation

included in that package,

Then please create (if necessary) new community thread.

Best regards

chip