How to use M240HTN01.2 on i.MX6Q

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How to use M240HTN01.2 on i.MX6Q

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Contributor I

Dear,

We designed a carrier board with i.MX6Q. And then the board includes M240HTN01.2.

So I modified DT, and I'm writing code below. But it isn't working! I think my DT isn't correct, and I have some questions.

Please advice for me.

1. When I check fb information using fbset command, V Hz is too fast.

    # D: 142.410 MHz, H: 135.628 kHz, V: 120.025 Hz

2. I'm not sure the values of V/H Back porch, V/H Front porch and V/H Sync.

- My DT -

17 &mxcfb1 {
18 interface_pix_fmt = "RGB24";
19 };

32 &ldb {
33    split-mode;
34    status = "okay";
35
36    lvds-channel@0 {
37       fsl,data-mapping = "spwg";
38       fsl,data-width = <24>;
39       //crtc = "ipu1-di0";
40       crtc = "ipu1-di0";
41       status = "okay";
42       primary;
43
44       display-timings {
45       native-mode = <&timing0>;
46       timing0: hsd100pxn1 {
47       clock-frequency = <142400000>;
48       hactive = <960>;
49       vactive = <1080>;
50       hback-porch = <44>;
51       hfront-porch = <44>;
52       vback-porch = <24>;
53       vfront-porch = <24>;
54       hsync-len = <2>;
55       vsync-len = <2>;
56    };
57    };
58 };

60 lvds-channel@1 {
61    fsl,data-mapping = "spwg";
62    fsl,data-width = <24>;
63    crtc = "ipu1-di1";
64    status = "okay";
65
66    display-timings {
67       native-mode = <&timing1>;
68       timing1: hsd100pxn1 {
69       clock-frequency = <142400000>;
70       hactive = <960>;
71       vactive = <1080>;
72       hback-porch = <44>;
73       hfront-porch = <44>;
74       vback-porch = <24>;
75       vfront-porch = <24>;
76       hsync-len = <2>;
77       vsync-len = <2>;
78       };
79 };
80 };

115 mxcfb1: fb@0 {
116 compatible = "fsl,mxc_sdc_fb";
117 disp_dev = "ldb";
118 default_bpp = <24>;
119 int_clk = <0>;
120 late_init = <0>;
121 status = "disabled";
122 };

148 &mxcfb1 {
149 status = "okay";
150 };
151 /*
152 &mxcfb2 {
153 status = "okay";
154 };
155
156 &mxcfb3 {
157 status = "okay";
158 };
159
160 &mxcfb4 {
161 status = "okay";
162 };
163 */

- fbset command -

root@linaro-alip:~# fbset

mode "960x1080-120"
# D: 142.410 MHz, H: 135.628 kHz, V: 120.025 Hz
geometry 960 1080 960 1088 32
timings 7022 44 44 24 24 2 2
rgba 8/16,8/8,8/0,8/24
endmode

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NXP TechSupport
NXP TechSupport

Hi dong

one can look at examples of lcd configuration on:

https://community.nxp.com/thread/308170#comment-422519 

https://boundarydevices.com/configuring-i-mx6-machines-different-screens-nitrogen6x-sabre-lite/ 

Best regards
igor
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