AnsweredAssumed Answered

How to change the backlight level ?

Question asked by victor Wang on Dec 21, 2017
Latest reply on Dec 21, 2017 by igorpadykov

Hi All,

I'm using Linux 4.1.15 and i.MX6 sabreSD for my layer.

I'm trying to modify the backlight level like below.

pwm-backlight {
compatible = "pwm-backlight";
pwms = <&pwm1 0 PANEL_PWM_PERIOD>;

brightness-levels = <
5 5 5 5 5 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49
50 50 50 50 50 50 50 50 50 50
50 50 50 50 50 50 50 50 50 50
50 50 50 50 50 50 50 50 50 50
50 50 50 50 50 50 50 50 50 50
50 50 50 50 50 50 50 50 50 50
50
>;
default-brightness-level = <100>;
status = "okay";
};

But the backlight nits is still up to 730.

The value 730 is when the balcklight settings still like below.

brightness-levels = <
/*0 1 2 3 4 5 6 7 8 9*/
5 5 5 5 5 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49
50 51 52 53 54 55 56 57 58 59
60 61 62 63 64 65 66 67 68 69
70 71 72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87 88 89
90 91 92 93 94 95 96 97 98 99
100
>;

 

Why the backlight Maximum is not changing ?

 

Thanks in Advanced!

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