OMAP ISP and Overlay
Laurent,
So far I have the everything working with the OMAP ISP to where I can stream video on our custom board. On a previous generation of hardware with a completely different processor and sensor, we used the V4L2 overlay feature to stream directly to our LCD for preview. I am wondering what the plans are for overlay support in the omap ISP? How does the overlay feature fit into the new media bus feature?
Thanks,
Lane
Hi Lane,
Quoted 3 lines · On Tuesday 24 August 2010 15:40:01 Lane Brooks wrote:
So far I have the everything working with the OMAP ISP to where I can stream video on our custom board.
Great news.
A new version of the ISP driver will soon be published with all the legacy code removed. We need a few days to setup the repository properly. You can already get a preview at http://git.linuxtv.org/pinchartl/media.git (omap3isp- rx51 branch).
Quoted 4 lines
On a previous generation of hardware with a completely different processor and sensor, we used the V4L2 overlay feature to stream directly to our LCD for preview. I am wondering what the plans are for overlay support in the omap ISP? How does the overlay feature fit into the new media bus feature?
The OMAP3 ISP driver won't support V4L2 overlay directly. However, you can use the USERPTR streaming mode and pass framebuffer memory directly to the ISP driver, resulting in DMA to the framebuffer and improved efficiency.
Signature · 3 lines
Regards, Laurent Pinchart
Quoted 30 lines
-----Original Message-----
From: [email protected] [mailto:linux-media- [email protected]] On Behalf Of Laurent Pinchart
Sent: Wednesday, August 25, 2010 2:56 PM
To: Lane Brooks
Cc: [email protected]
Subject: Re: OMAP ISP and OverlayHi Lane,
Quoted 2 lines · On Tuesday 24 August 2010 15:40:01 Lane Brooks wrote:
So far I have the everything working with the OMAP ISP to where I can
stream
Quoted 1 line
video on our custom board.
Great news.
A new version of the ISP driver will soon be published with all the legacy code removed. We need a few days to setup the repository properly. You can already get a preview at http://git.linuxtv.org/pinchartl/media.git
(omap3isp-
rx51 branch).Quoted 1 line
On a previous generation of hardware with a completely different
processor
Quoted 1 line
and sensor, we used the V4L2 overlay feature to stream directly to our
LCD
Quoted 1 line
for preview. I am wondering what the plans are for overlay support in
Quoted 9 lines
the
Quoted 1 line
omap ISP? How does the overlay feature fit into the new media bus
feature?
The OMAP3 ISP driver won't support V4L2 overlay directly. However, you can use
the USERPTR streaming mode and pass framebuffer memory directly to the ISP driver, resulting in DMA to the framebuffer and improved efficiency.
Sorry for late reply,
Just wanted to add on top of this, you could use V4L2 Display driver here which supports 2 video planes (over /dev/video0 & /dev/video1) along with both User pointer mode and MMAP mode of operation.
Thanks,
Vaibhav
Quoted 8 lines
--
Regards,Laurent Pinchart
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