2011-06-06 02:48:55     LCD flicker issue in 2010 kerenl

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2011-06-06 02:48:55     LCD flicker issue in 2010 kerenl

ThangarJ P (INDIA)

Message: 101007   

 

Hi,

 

 

 

I am working BF527 based custom board and the kerenl "blackfin-linux-dist-2010R1-RC5".

 

we have ported the LCD driver with this distribution.

 

we are seeing more flicker on the LCD display.

 

But in 2009 kernel the flicker happens occasionally.

 

could you please help me to solve the issue in the 2010 kernel.

 

 

 

 

 

Thank you,

 

Thanagraj.P

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2011-06-06 22:02:00     Re: LCD flicker issue in 2010 kerenl

Aaron Wu (CHINA)

Message: 101013   

 

Could you give more description about your LCD module type, the display resolution and refresh rate. Also on the ADI Evaluatation board could you observe this flicker?

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2011-06-07 01:27:17     Re: LCD flicker issue in 2010 kerenl

ThangarJ P (INDIA)

Message: 101014   

 

Dear Aaron,

 

 

 

Thank you.

 

please find the details of our LCD below.

 

Type = Giantplus 2.4" LCD

 

x-resolution = 240

 

y-resolution = 320

 

display refresh rate = 45

 

we did not test in ADI Evalution board.

 

we fare acing the flicker issue in 2009 kernel itself.but its occasionally.

 

If we port the same driver in 2010 kernel the flicker is too much high compared to 2009 kernel.

 

please help us to solve the issue in the 2010 kerenl.

 

 

 

Thank you,

 

Thangaraj.P

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2011-06-07 02:22:47     Re: LCD flicker issue in 2010 kerenl

Sonic Zhang (CHINA)

Message: 101015   

 

Please attach your kernel configuration and LCD driver in 2010R1-RC5.

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2011-06-07 02:38:12     Re: LCD flicker issue in 2010 kerenl

ThangarJ P (INDIA)

Message: 101016   

 

Dear Sonic,

 

 

 

Please find the config file and driver files in the attachment.

 

 

 

Thank you,

 

Thangaraj.P

 

LCD.zip

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2011-06-07 03:31:08     Re: LCD flicker issue in 2010 kerenl

Sonic Zhang (CHINA)

Message: 101047   

 

Please don't forget to enable icache and dcache for external memory in your kernel config.

 

CONFIG_BFIN_ICACHE=y

# CONFIG_BFIN_EXTMEM_ICACHEABLE is not set

CONFIG_BFIN_DCACHE=y

# CONFIG_BFIN_EXTMEM_DCACHEABLE is not set

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