mxc_fb wait vsync timeout

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mxc_fb wait vsync timeout

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yufe
Contributor II

hello,

We are using the i.MX6DP processor on a custom board, project's kernel version is 3.14.52. We found that some boards have a higher probability of “MXCFB_WAIT_FOR_VSYNC: timeout 0” error message, Some information is as follows, See the attachment for details.

[ 5.514772] mxc_sdc_fb fb.18: MXCFB_WAIT_FOR_VSYNC: timeout 0
[ 6.514760] mxc_sdc_fb fb.18: MXCFB_WAIT_FOR_VSYNC: timeout 0
[ 7.014770] mxc_sdc_fb fb.18: timeout when waiting for on the fly config irq
[ 7.014775] detected fb_set_par error, error code: -110
[ 7.025603] random: nonblocking pool is initialized
[ 7.217643] ------------[ cut here ]------------
[ 7.217651] Kernel BUG at 802cfeb4 [verbose debug info unavailable]

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi yufe

issue was fixed in latest linux kernels, also one can check

MXCFB_WAIT_FOR_VSYNC: timeout 0 

Best regards
igor
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ji_yun
Contributor II

Hi ,igorpadykov

we have the same question and log.

As you said the issue was fixed in latest linux kernel,can you tell us the detail about how the latest linux kernel fix the issue,or give us a patch. Our project's kernel version is 3.14.52