Hi Deepika,

As per the specs, VPIF cannot display planar YUV422 data. It says it takes Luma 
and Chroma data for top and bottom field for interlaced image and Luma and 
Chroma data for the Progressive image. Also there is no separate register even 
to specify buffer pointer for cb and cr data. This is also true for the VDCE. 
Can you please tell me where it says VPIF can display planar YUV422 images? 

Thanks,
Brijesh Jadav
________________________________________
From: davinci-linux-open-source-boun...@linux.davincidsp.com 
[davinci-linux-open-source-boun...@linux.davincidsp.com] On Behalf Of Deepika 
Makhija [deepika.makh...@einfochips.com]
Sent: Saturday, August 01, 2009 12:01 AM
To: Vinayagam Mariappan
Cc: Davinci-linux-open-source@linux.davincidsp.com
Subject: Re: saDisplay + DM6467 showing black an white image in SD Display

Hi,

DM6467 encode/decode  supports 4:2:0 YUV semi planar mode only
Capture driver supports 4:2:2 YUV semi planar and display supports 4:2:2  semi 
planar and planar.
VDCE module performs conversion irrespective of planar/semi planar mode, it 
does resize and CCV conversion

Assume you perform CCV conversion of 4:2:2 to 4:2:0 than

 *   If input is 4:2:2 semi planar than output will be 4:2:0 semi planar
 *   If input is 4:2:2 planar than output will be 4:2:0 planar

Capture and display drivers allocate buffer for 1920x1080 resolution during 
initialization.  Two buffers are located, one for luma and other for chroma.
So, Chroma will be at the offset of 1920*1080 irrespective of the capture 
resolution. Same is true for the display driver. But this is the case only for 
MMAP buffers as MMAP buffers are allocated by the driver.

Luma and chroma can be arranged together with the ioctl S_FMT. In that case 
chroma data will be at the offset of "width*height", where width/height 
corresponds to the resolution selected.

One more thing, in case of MMAP buffers, if S_FMT is performed than Luma and 
chroma will be aligned together and buffer length would be still 1920*1080*2 as 
those buffers are allocated during initialization. VDCE expects chroma at the 
offset of  "buffer length /2", in that case also only Y data will appear, as 
actual chroma data would be at 720*480 offset for NTSC.

Hope this helps you to debug your problem

Regards,
Deepika

Vinayagam Mariappan wrote:
Hi,

Its confusing me......

Let me give your data....

In my system, I just decode MPEG-4 Data and get YUV420 on D1 resolution.. Now 
What I am doing is Just get one Frame of YUV420 data from decoder (YUV420 => 
[YYYYYYYYYY....][UUUUUU...][VVVVV....] then convert that YUV420 to YUV422 using 
saCCV420_422 and then I use the converted YUV422 to display unit using 
saDisplay.

I get Luma data properly out on screen but never get Chroma.

Actually I use Decoder Demo Application which made for HD. I have able to 
display the HD Decoded data comes with demo and display it on SD unit. But when 
I use my customized decoded on D1 resolution I am not getting anything on 
screen. So I want to debug the issue using saDisplay then update it on 
applicayion.

I hope you got me in a right way...

Looking forward to fix this issue.

Regards,
Vinayagam M

On Sat, Aug 1, 2009 at 3:12 AM, Jadav, Brijesh R 
<brijes...@ti.com<mailto:brijes...@ti.com>> wrote:
Hello Murali,

DM6467 supports NV16 video format, where image is stored in two buffers. First 
buffer contains luma data and second buffer contains cb and cr interleaved 
data. It does not support completele YUV422 interleaved data.

You are right, chroma buffer pointer could also be an problem. Display driver 
always expects chroma data at the half of the buffer size.

Thanks,
Brijesh Jadav
________________________________________
From: Karicheri, Muralidharan
Sent: Friday, July 31, 2009 10:34 AM
To: Jadav, Brijesh R; Vinayagam Mariappan
Cc: 
Davinci-linux-open-source@linux.davincidsp.com<mailto:Davinci-linux-open-source@linux.davincidsp.com>
Subject: RE: saDisplay + DM6467 showing black an white image in SD Display

Brijesh,

DM6467 display accept YUV422 planar. The format is YUV422 => 
[YYYYYYYYYYYYYYYY][UUUUU][VVVVV].
as given by Vinayagam.

If you are seeing black and white image, it is probably because your cbcr offer 
is not correct.
The display driver in expects cbcr offset at half kernel buffer size (MMAP) and 
half of sizeimage for UserPTR.
I have been working to port the code to GIT and this is what I have understood.

Murali Karicheri
Software Design Engineer
Texas Instruments Inc.
Germantown, MD 20874
Phone : 301-515-3736
email: m-kariche...@ti.com<mailto:m-kariche...@ti.com>
________________________________
From: 
davinci-linux-open-source-bounces+m-karicheri2=ti.com<http://ti.com/>@linux.davincidsp.com<http://linux.davincidsp.com/>
 
[mailto:davinci-linux-open-source-bounces+m-karicheri2<mailto:davinci-linux-open-source-bounces%2Bm-karicheri2>=ti.com<http://ti.com/>@linux.davincidsp.com<http://linux.davincidsp.com/>]
 On Behalf Of Jadav, Brijesh R
Sent: Friday, July 31, 2009 8:42 AM
To: Vinayagam Mariappan
Cc: 
Davinci-linux-open-source@linux.davincidsp.com<mailto:Davinci-linux-open-source@linux.davincidsp.com>
Subject: RE: saDisplay + DM6467 showing black an white image in SD Display

Hi,

DM6467 display module accepts data in the YUV422 semi-planar format. It is as 
shown below

YUV422 => [YYYYYYYYYYYYYYYY][UVUVUVUVUV].
Probably, this is reason why you are not getting correct color information.

Thanks,,
Brijesh Jadav

________________________________
From: Vinayagam Mariappan 
[mailto:vinayagamenm...@gmail.com<mailto:vinayagamenm...@gmail.com>]
Sent: Friday, July 31, 2009 6:08 PM
To: Jadav, Brijesh R
Cc: 
Davinci-linux-open-source@linux.davincidsp.com<mailto:Davinci-linux-open-source@linux.davincidsp.com>
Subject: Re: saDisplay + DM6467 showing black an white image in SD Display

Hi,

YUV422 => [YYYYYYYYYYYYYYYY][UUUUU][VVVVV].

How about YUV420....I have my own MPEG-4 Decoder which gives out YUV420 with D1 
resolution.

I am using TI Sample Application to Interface with our own MPEG-4 Decoder 
Server. I get my YUV data to application but I am not able to display it.

Where do I making mistake?

Regards,
Vinayagam M
On Fri, Jul 31, 2009 at 9:31 PM, Jadav, Brijesh R 
<brijes...@ti.com<mailto:brijes...@ti.com><mailto:brijes...@ti.com<mailto:brijes...@ti.com>>>
 wrote:

Hi,



What is the format of your YUV422 file? DM6467 supports only YUV422 Semi-Planar 
format.



Thanks,

Brijesh Jadav



________________________________

From: Vinayagam Mariappan 
[mailto:vinayagamenm...@gmail.com<mailto:vinayagamenm...@gmail.com><mailto:vinayagamenm...@gmail.com<mailto:vinayagamenm...@gmail.com>>]
Sent: Friday, July 31, 2009 5:57 PM
To: Jadav, Brijesh R
Cc: 
Davinci-linux-open-source@linux.davincidsp.com<mailto:Davinci-linux-open-source@linux.davincidsp.com><mailto:Davinci-linux-open-source@linux.davincidsp.com<mailto:Davinci-linux-open-source@linux.davincidsp.com>>
Subject: Re: saDisplay + DM6467 showing black an white image in SD Display



Hi,

Yes, I know...
But I have modified to play with YUV422 sample. I get only Luma not chroma....

I am just fulling the buffer with YUV422 Data.

Regards,
Vinayagam M

On Fri, Jul 31, 2009 at 9:19 PM, Jadav, Brijesh R 
<brijes...@ti.com<mailto:brijes...@ti.com><mailto:brijes...@ti.com<mailto:brijes...@ti.com>>>
 wrote:

Hi,



As far as I remember, this application does not work the sample image. 
Application actually generates color bar and displays it.



Thanks,

Brijesh Jadav



________________________________

From: 
davinci-linux-open-source-boun...@linux.davincidsp.com<mailto:davinci-linux-open-source-boun...@linux.davincidsp.com><mailto:davinci-linux-open-source-boun...@linux.davincidsp.com<mailto:davinci-linux-open-source-boun...@linux.davincidsp.com>>
 
[mailto:davinci-linux-open-source-boun...@linux.davincidsp.com<mailto:davinci-linux-open-source-boun...@linux.davincidsp.com><mailto:davinci-linux-open-source-boun...@linux.davincidsp.com<mailto:davinci-linux-open-source-boun...@linux.davincidsp.com>>]
 On Behalf Of kirthika varadarajan
Sent: Friday, July 31, 2009 3:28 PM
To: 
Davinci-linux-open-source@linux.davincidsp.com<mailto:Davinci-linux-open-source@linux.davincidsp.com><mailto:Davinci-linux-open-source@linux.davincidsp.com<mailto:Davinci-linux-open-source@linux.davincidsp.com>>
Subject: saDisplay + DM6467 showing black an white image in SD Display



We tried displaying yuv4::2:2(740x480) image in SD display using 
saDisplay(application sample ibn PSP),

But we  are getting black and white image even if we input color image.

We tried the sample  file  given in PSP.



But black.



we are curious to know how to get the color  SD display.



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--
Regards,
Vinayagam M

VeNMSOL Technologies,

#7A, First Cross Street, Ganapathy Colony,

Ekkaduthangal, Chennai - 600 032,India.

Tel:+91-44-4353 0168;Mobile:+91-9445-019919

URL: 
www.venmsol.com<http://www.venmsol.com/><http://www.venmsol.com<http://www.venmsol.com/>>
"We make a living by what we get, we make a life by what we give...- Unknown "



--
Regards,
Vinayagam M

VeNMSOL Technologies,

#7A, First Cross Street, Ganapathy Colony,

Ekkaduthangal, Chennai - 600 032,India.

Tel:+91-44-4353 0168;Mobile:+91-9445-019919

URL: 
www.venmsol.com<http://www.venmsol.com/><http://www.venmsol.com<http://www.venmsol.com/>>
"We make a living by what we get, we make a life by what we give...- Unknown "



--
Regards,
Vinayagam M

VeNMSOL Technologies,

#7A, First Cross Street, Ganapathy Colony,

Ekkaduthangal, Chennai - 600 032,India.

Tel:+91-44-4353 0168;Mobile:+91-9445-019919

URL: www.venmsol.com<http://www.venmsol.com>
"We make a living by what we get, we make a life by what we give...- Unknown "




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Thanks & Regards,
Deepika Makhija
eInfochips Ltd.
Tel. No. +91-79-26563705 Ext. 218
www.einfochips.com<http://www.einfochips.com>

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