about adv7181 display on screen

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about adv7181 display on screen

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rothwanhuang
Contributor II

Hi, i have same question about adv7181display on screen,

1 . Now I use Yocto project "imx6q_L3_14_52" & "fsl-releases-bsp";

2. CVBS signal through adv7181converts to bt656,and V4l2 capture image and display on LCD;

The quetsion is the display and capture iimage have some Horizontal stripes,for examples please look the attachment,and how about to slove it ? thanks!

QQ图片20160921160955.jpg

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi rothwan

for bt656 camera format mxc_v4l2_tvin.c should be used,

not V4l2 capture, please test with imx-test/test/mxc_v4l2_test

www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.3.tar.gz

Also stripes may be caused by resizing, please check

i.MX6 GStreamer-imx Plugins - Tutorial & Example Pipelines 

Best regards
igor
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rothwanhuang
Contributor II

Some people think that is the conversion, the singal of CVBS is interleave,and the signal from adv7181 is thinterleave,but imx6q the display is progressive,If this problem causes, how to solve?

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igorpadykov
NXP TechSupport
NXP TechSupport
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rothwanhuang
Contributor II

Yes, i have check it , and For adv7181, I have try the followed settting:

p->if_type = V4L2_IF_TYPE_BT656;

p->u.bt656.mode = V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT;

p->u.bt656.nobt_hs_inv = 0;

p->u.bt656.bt_sync_correct = 0;  // Use internal VSYNC mode, CSI_VSYNC and CSI_HSYNC pins are not needed.

p->u.bt656.clock_curr = 0;  //BT656 interlace clock mode

 

   adv7181 I2C register setting for CVBS input:

adv7180_write_reg(0x00,0x00);

adv7180_write_reg(0x03,0x0c);

adv7180_write_reg(0x04,0x77);

adv7180_write_reg(0x17,0x41);

adv7180_write_reg(0x1d,0x47);

adv7180_write_reg(0x31,0x02);

adv7180_write_reg(0x3a,0x17);

 

adv7180_write_reg(0x3b,0x81);

adv7180_write_reg(0x3d,0xa2);

adv7180_write_reg(0x3e,0x6a);

adv7180_write_reg(0x3f,0xa0);

adv7180_write_reg(0x86,0x0b);

adv7180_write_reg(0xf3,0x01);

adv7180_write_reg(0xf9,0x03);

              

adv7180_write_reg(0x0e,0x80);

adv7180_write_reg(0x52,0x46);

adv7180_write_reg(0x54,0x00);

adv7180_write_reg(0x7f,0xff);

adv7180_write_reg(0x81,0x30);

adv7180_write_reg(0x90,0xc9);

adv7180_write_reg(0x91,0x40);

adv7180_write_reg(0x92,0x3c);

adv7180_write_reg(0x93,0xca);

adv7180_write_reg(0x94,0xd5);

                        

adv7180_write_reg(0xb1,0xff);

adv7180_write_reg(0xb6,0x08);

adv7180_write_reg(0xc0,0x9a);

adv7180_write_reg(0xcf,0x50);

adv7180_write_reg(0xd0,0x4e);

adv7180_write_reg(0xd1,0xb9);

adv7180_write_reg(0xd6,0xdd);

adv7180_write_reg(0xd7,0xe2);

adv7180_write_reg(0xe5,0x51);

adv7180_write_reg(0xf6,0x3b);

 

adv7180_write_reg(0x0e,0x00);

 

but this problem is still ,Why?

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rothwanhuang
Contributor II

Yes,the picture is  from ./mxc_v4l2_tvin.out -ow 720 -oh 625 -ol 10 -ot 20 -f UYVY, and the motiom level is High, the problem is still have.

Best regards.

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