topic Re: Question about CSIx_SENS_PRTCL bit function in i.MX Processors

Question about CSIx_SENS_PRTCL bit function

takayuki_ishii — Fri, 13 Oct 2017 12:59:50 GMT

Hello,

I have a question about CSIx_SENS_PRTCL bit setteng, between Interlace and Progressive.

When, CSI set to input BT656 interlace like a section "2.1.1 BT.656 Interlace Setting" in

document i.MX6 IPU TVIN Application Note.

In this time, if CSIx_SENS_PRTCL bit change from 0x3(BT.656 interlaced mode)

to 0x2(BT.656 progressive mode), it can capture only field 0 line data because only

detect EAV/SAV pattern setting in IPU_CSI_CCIR_CODE_1 register.

And the IPU_CSI_CCIR_CODE_2 register setting is ignored.

Is it correct?

Best regards,

Ishii.

Re: Question about CSIx_SENS_PRTCL bit function

igorpadykov — Fri, 13 Oct 2017 23:05:26 GMT

Hi Ishii

yes this understanding is correct, on p.5 document states:

"IPU_CSI_CCIR_CODE_1, it is for frame EAV/SAV setting
IPU_CSI_CCIR_CODE_2, not used for progressive mode "

Best regards
igor
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Re: Question about CSIx_SENS_PRTCL bit function

takayuki_ishii — Mon, 16 Oct 2017 12:19:51 GMT

Hello

Igor,

Thank you for your quick response.

In Progressive mode, I have three additional questions.

In this time, section "2.5.2 CCIR Register Setting for Progressive Signal" in document

iMX6 IPU TVIN Application Notes say that

"in register IPU_CSI_CCIR_CODE_1, only CSI_STRT_FLD0_BLNK_1ST, CSI_STRT_FLD0_ACTV and
CSI_END_FLD0_ACTV are used, the three bits register value for each region (MSB to LSB) is H, V, F
data, and F is always 0."

1) Why only this three bit field are used?

2) Some video decoder output BT656 progressive data with F bit = 1.

In this time, is this decoder not used with iMX6?

3) How detect a start line of the new frame/ blanking and Active Video area?

Only F,V,H bit pattern match with CSI_CCIR_CODE_1 register bit?

or use some other condition like IPU_CSI_SENS_FRM_SIZE and IPU_CSI_ACT_FRM_SIZE value.

Best regards,

Ishii.

Re: Question about CSIx_SENS_PRTCL bit function

igorpadykov — Mon, 16 Oct 2017 12:56:32 GMT

Hi Ishii

for new questions please create new thread.

Best regards
igor

Re: Question about CSIx_SENS_PRTCL bit function

takayuki_ishii — Mon, 16 Oct 2017 13:49:17 GMT

Hello Igor

Thank you very much for your assistance.

I create new thread as following.

Question about bt.656 progressive video capture function.

I am looking forward to hearing from you.

Best regards,

Ishii.