LCD Display contrast/gamma adjustment

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LCD Display contrast/gamma adjustment

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slimSHA
Contributor III
We have a 7 inch LCD display connected to our SOC (IMX6) and a QTE-based application is running on it (No X Window system). 
Everything is fine but the LCD contrast is not that good. The colors need to be a little darker. 
we have tried adjusting gamma using MXCFB_SET_GAMMA ioctl (the source code is attached) and were able to see some changes in the color. but the colors are distorted. 
How to properly adjust the gamma/contrast of an LCD screen? 
 
any help is appreciated. 
Thanks in advance.
 
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igorpadykov
NXP Employee
NXP Employee
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igorpadykov
NXP Employee
NXP Employee

Hi Thejas

 

may be useful to look at unit test examples

https://source.codeaurora.org/external/imx/imx-test/tree/test/mxc_fb_test?h=lf-5.10.52_2.1.0

 

Best regards
igor