DS90UB960-Q1: 4 cameras cannot be turned on at the same time occasionally

xiangbo zhang

Prodigy 130 points

Part Number: DS90UB960-Q1

hi teams:

we are using the 960+935+4 sensors.The sensor output is the same pixel 1920*1080.

we use 960 two ports output data to two csi2 of cpu.

sensorA----------| -------------960 csi2 port 0

sensorB----------|

sensorC----------|--------------960 csi2 port 1

sensorD----------|

4 sensors can be opened separatly, but can not be open at the same time occasionally.

when we using the 960+933+4 sensors, and the same pixel, there is no such phenomenon,

the 960 reg configuration is following, Are there any other inaccuracies? Please look at this problem for me, Thanks.

//"*** set RX0 VC=0 enable ***"
ti960_write_reg(client, 0x4c, 0x01);

//BCC_CONFIG Rx port access and 50Mbps
ti960_write_reg(client, 0x58, 0x5e);

//SER_ALIAS_ID Register setting
ti960_write_reg(client, 0x5c, 0x30);

//Remoute i2c slave addr
ti960_write_reg(client, 0x5d, 0xda);

//SLAVE_ALIAS_ID0
ti960_write_reg(client, 0x65, 0xba);

ti960_write_reg(client, 0xb0, 0x1c);

//VC and DT set
ti960_write_reg(client, 0x70, 0x1e);

ti960_write_reg(client, 0x72, 0x00);

msleep(5);

        //"*** RX1 VC=1 ***"
        ti960_write_reg(client, 0x4c, 0x12);
        ti960_write_reg(client, 0x58, 0x5e);
        ti960_write_reg(client, 0x5c, 0x32);
        ti960_write_reg(client, 0x5d, 0xda);
        ti960_write_reg(client, 0x65, 0xbc);
        ti960_write_reg(client, 0xb0, 0x1c);
        ti960_write_reg(client, 0x70, 0x5e);
        ti960_write_reg(client, 0x72, 0x55);
        msleep(5);

        //"*** RX1 VC=2 ***"
        ti960_write_reg(client, 0x4c, 0x24);
        ti960_write_reg(client, 0x58, 0x5e);
        ti960_write_reg(client, 0x5c, 0x40);
        ti960_write_reg(client, 0x5d, 0xda);
        ti960_write_reg(client, 0x65, 0xbe);
        ti960_write_reg(client, 0xb0, 0x1c);
        ti960_write_reg(client, 0x70, 0x9e);
        ti960_write_reg(client, 0x72, 0xAA);
        msleep(5);

        //"*** RX1 VC=3 ***"
        ti960_write_reg(client, 0x4c, 0x38);
        ti960_write_reg(client, 0x58, 0x5e);
        ti960_write_reg(client, 0x5c, 0x42);
        ti960_write_reg(client, 0x5d, 0xda);
        ti960_write_reg(client, 0x65, 0xc0);
        ti960_write_reg(client, 0xb0, 0x1c);
        ti960_write_reg(client, 0x70, 0xde);
        ti960_write_reg(client, 0x72, 0xff);
        msleep(5);

//"CSI_PORT_SEL"
ti960_write_reg(client, 0x32, 0x01);

//"CSI_EN"
ti960_write_reg(client, 0x33, 0x03);

//"CSI_PORT_SEL"
ti960_write_reg(client, 0x32, 0x13);

//"CSI_EN"
ti960_write_reg(client, 0x33, 0x03);

        //"CSI_PORT_SEL"
        ti960_write_reg(client, 0x20, 0xFC);
        ti960_write_reg(client, 0x20, 0x0C);

over 3 years ago

0 Sally Cheung95 over 3 years ago

TI__Expert 5480 points

Hello Xiangbo,

Could you give me some more details about the CSI data? Please fill out the missing data for me.

Horizontal = 1920
Vertical = 1080
Framerate = ?
Bpp = 10
CSI-2 Output Lane Speed =?
CSI-2 Lanes = 4

Thanks,
Sally

0 xiangbo zhang over 3 years ago in reply to Sally Cheung95

Prodigy 130 points

hi Sally

Thanks for your reply.

Horizontal = 1920

Vertical = 1080

Framerate = 30

Bpp = 10

CSI-2 Output Lane Speed =2.5Gbps

CSI-2 Lanes = 4

1920*1080*30*16 = 995Mbps

2*995Mbps < cpu CSI-2 Lane Speed

So the cpu CSI-2 side can support two video streams.

Is this a problem of the 960 register configuration?

0 Casey McCrea over 3 years ago in reply to xiangbo zhang

TI__Guru* 98535 points

Xiangbo,

DS90UB960-Q1 does not have any 2.5Gbps/lane output speed setting. What CSI-2 lane speed setting are you using for 960 in register 0x1F?

Best Regards,

Casey

0 xiangbo zhang over 3 years ago in reply to Casey McCrea

Prodigy 130 points

hi Casey

Thanks for your reply.

I didn't configure the register and used the default value. The document indicates that the default value is 0x02, which corresponds to the rate of 800Mbps. Shoud I need to set it to 0x00 (1.664Gbps)? In addition, are there any other registers need to be configured? Thanks

0 xiangbo zhang over 3 years ago in reply to Casey McCrea

Prodigy 130 points

hi Casey

Thank you very much for your help. After changing the 0x1f register, the problem is solved.

0 xiangbo zhang over 3 years ago in reply to Casey McCrea

Prodigy 130 points

hi Casey

Now I have another question. I need your help. Now we changed the internal trigger camera to the external trigger camera. there is no camera data. how should we configure 960. How does the external trigger camera work? Can you help me? Thanks.