How to solve the problem that the imx6dl console print the fb0 error

[pengxingwei]

Hello all,

            I come cross a problem ,the imx6dl console is always print the log:

[2308151.755871] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308152.265892] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308152.775892] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308153.285885] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308153.795892] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308154.306169] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308160.235880] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308160.745877] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308161.255889] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308161.765887] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308181.575883] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308182.095867] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308183.115928] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308183.635924] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308187.345912] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308187.855995] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308188.885913] mxc_sdc_fb fb@0: timeout when waiting for flip irq
[2308189.395906] mxc_sdc_fb fb@0: timeout when waiting for flip irq

my platform is imx6dl，on which run Android6.0.1 OS (kernel 4.1.15) , the lcd display is normal ,but when the board is run for a long time about several days, the LCD display is abnormal ,and I print the log by uart console,it always print:

mxc_sdc_fb fb@0: timeout when waiting for flip irq

How to solve it ? Thanks

[joanxie]

The error means there is display underrun on IPU. what operation do you do when the board is runing?To reduce the failure, the customer can add "dmfc=3" in the kernel boot command line