topic Re: imx6q hdmi compatible test fail in i.MX Processors

imx6q hdmi compatible test fail

jiangyaqiang — Mon, 12 Oct 2020 02:24:06 GMT

HI anyone:

Our project need to pass the "hdmi compatible test" but some item fail.

Does anyone know about the hdmi CTS thing and give me a hand ?

Here is the project information:

1. hardware: imx6q

2. software: android4.4.2 kernel:3.0.14

fail items:

1, 7-29, fail only on VIC1 640x480p 60Hz, the lab advise to change the N and CTS value according to the table, but I don't know where to modify :

here is the log:

Test ID 7-29 : ACR

Verify N parameter value.
Found Audio Sample Packet
N Value = 0x1880
Pass
Verify CTS parameter value
Fs_actual = 39423.6005
CTS average = 31250.0000
Clock Accuracy (Bits 28,29) = [0x00]
Pass
Verify CTS transmitting interval
CTS interval = 0.00124292 Second
Error : Illegal CTS interval.
Test ID 7-29 : FAIL

fail 2: 7-13, C2 is too large on DUT OFF :

Re: imx6q hdmi compatible test fail

igorpadykov — Mon, 12 Oct 2020 04:31:48 GMT

Hi jiangyaqiang

for supported HDMI timings one can refer to sect.33.4.3 Supported Video Mode

i.MX 6Dual/6Quad Applications Processor Reference Manual

and AN4671

AN4671, i.MX 6 Series HDMI Test Method for Eye Pattern and Electrical Characteristics - Application Notes

Best regards
igor

Re: imx6q hdmi compatible test fail

jiangyaqiang — Fri, 16 Oct 2020 07:47:13 GMT

HI igorpadykov:

Thanks.

I have checked the video mode, it supports.

And the "Eye pattern" test is pass.

The test fail in CTS (hdmi compatible test), the fail item is :ID 7-29

and it only fail at resolution 640x480.

Here is the log:

(I have checked the N and CTS value, it's setted according toassociation provided, maybe the root cause is not the N and CTS value

)

Test ID 7-29 : ACR

Verify N parameter value.

Found Audio Sample Packet

N Value = 0x1880

Pass

Verify CTS parameter value

Fs_actual = 39423.6005

CTS average = 31250.0000

Clock Accuracy (Bits 28,29) = [0x00]

Pass

Verify CTS transmitting interval

CTS interval = 0.00124292 Second

Error : Illegal CTS interval.

Test ID 7-29 : FAIL

Re: imx6q hdmi compatible test fail

igorpadykov — Fri, 16 Oct 2020 10:22:31 GMT

Hi jiangyaqiang

for CTS tests may be suggested to proceed with extended support of

https://contact.nxp.com/new-prof-svcs-sw-tech

Best regards
igor

Re: imx6q hdmi compatible test fail

jiangyaqiang — Mon, 19 Oct 2020 03:20:57 GMT

HI :

But the "Professional Engineering Services" need to pay.

We don't want to pay for such an issue, the evk board should have did the test, could you contact your

internal engeer, who have ever handle the CTS ?

Re: imx6q hdmi compatible test fail

igorpadykov — Mon, 19 Oct 2020 04:49:09 GMT

Hi jiangyaqiang

unfortunately there are no other standard ways for CTS tests support.

Suggest to apply to local marketing office to check if it is possible to help with other options.

Best regards
igor