I have some questions about DSS.

I have some questions about DSS.

[InKi Dae]

I am trying to draw 720P streamming images decoded on LCD.
I really wonder about that.

In case of OMAP34XX, only video1 and video2 layer support color space
conversion, scaling, rotation.
I think that ways using these features are like below.

1. Application -> video1 or 2 device node -> V4L2 Interface -> DSS
Library -> LCD Panel or Digital output.
2. Application -> fb1 or 2 device node -> omafb driver -> DSS Library
-> LCD Panel or Digital output.

Are all of the 1 and 2 case possible to draw 720P streamming images on
LCD Panel in real-time ?
If the case of 1 is impossible, why impossible, and what is the reason
implementing like case 2 ?

If possible, What is the way better ?
Could you please tell me you know and you think ?

Thank you,
- InKi -

RE: I have some questions about DSS.

[Hiremath, Vaibhav]

Thanks,
Vaibhav Hiremath
________________________________________
From: InKi Dae [mailto:daeinki@gmail.com] 
Sent: Sunday, March 15, 2009 12:28 PM
To: Hiremath, Vaibhav
Cc: linux-omap@vger.kernel.org
Subject: I have some questions about DSS.

I am trying to draw 720P streamming images decoded on LCD.
I really wonder about that.
In case of OMAP34XX, only video1 and video2 layer support color space conversion, scaling, rotation.
I think that ways using these features are like below.

[Hiremath, Vaibhav] Rotation is independent on plane, we are supporting rotation through VRFB.

1. Application -> video1 or 2 device node -> V4L2 Interface -> DSS Library -> LCD Panel or Digital output.
2. Application -> fb1 or 2 device node -> omafb driver -> DSS Library -> LCD Panel or Digital output.

[Hiremath, Vaibhav] Both the methods are working fine, at-least I have tested both.

Are all of the 1 and 2 case possible to draw 720P streamming images on LCD Panel in real-time ?
If the case of 1 is impossible, why impossible, and what is the reason implementing like case 2 ?
If possible, What is the way better ?

[Hiremath, Vaibhav]For streaming kind of application I would suggest you to use V4L2 framework.

Could you please tell me you know and you think ?
Thank you,
- InKi -