Imx6 BT1120  720P progressive output issue

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Imx6 BT1120  720P progressive output issue

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Contributor I

Hi ,

We want 720P output on imx6Q platform , but met output issue .our platform ENV:

1. kernel 4.1.15 +manual path "L3.14.52_1.1.0_GA_bt656_output_patch".

 

we check the ITU-R BT1120 document  and progressive  scan like as bellow:

and we check the function code _ipu_dc_setup_bt656_progressive in  Ipu_disp.c,  we found that :

when send blank video on I-frame . it send whole line (bt656_v_start_width+bt656_v_end_width) by _ipu_dc_write_tmpl(ipu, microcode_addr, BMA, loop_frame_blank_line_times, 0, 0, 0, 0, 0, 0, 0);

we can't control the bank line (L2-L1) and (L6-L5), it is different on 720P and 1080P.  

Did you verify these code yet ? Kindly please give us advice or give me more information about these ,we requried question at several days ago at 

https://community.nxp.com/message/1047421 

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NXP TechSupport
NXP TechSupport

where did you get this patch? from the link as below? what detailed patch name you use?  is it"0001-Support-BT656-and-BT1120-output-for-iMX6-ipuv3.patch"?

Patch to Support BT656 and BT1120 Output For i.MX6 BSP 

what do you mean if we verify these code? yes, these codes are tested and verified by AE team, but you couldn't use 3.14.52 patch on the 4.1.15 directly, customer needs to change something according to the new kernel.

and this patch is for NTSC and PAL, 1080i  as demo, if you need to 720P, you also need to change.

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Contributor I

Hi,

        We have got the same problem as Zi Li  did in i.mx6 output bt1120 720P video, has some problem ,the only different thing is that we use kernel 3.14.52,but got the same result.

And I noticed that you said "and this patch is for NTSC and PAL, 1080i  as demo, if you need to 720P, you also need to change."

So if we need to 720P,what kind of change should be make?Can you give more detail about this?Thanks a lot!

 

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