V4L on OMAP3

V4L on OMAP3

[Ajit Motra]

Hello,

 We received OMAP3 board from TI. This has linux from mistral on this. There is a node /dev/video0 on this but when I try to open this using O_RDONLY or O_RDWR option, this does not open device. Is V4L functionality missing in this case? 
We are using Linux version 2.6.22.1. We have registered our EVB on TI website but there are no new updates for OMAP3503.

Thanks 
Motra

RE: V4L on OMAP3

[Hiremath, Vaibhav]

Can you pleas tell me what kind of error message you are getting? And probably I may want to see your .config file.

Thanks,
Vaibhav Hiremath
Senior Software Engg.
Platform Support Products
Texas Instruments Inc
Ph: +91-80-25099927
TI IP Ph: 509-9927
http://dbdwss01.india.ti.com/pspproducts/

-----Original Message-----
From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Ajit Motra
Sent: Thursday, June 26, 2008 1:39 PM
To: linux-omap@vger.kernel.org
Subject: V4L on OMAP3

Hello,

 We received OMAP3 board from TI. This has linux from mistral on this. There is a node /dev/video0 on this but when I try to open this using O_RDONLY or O_RDWR option, this does not open device. Is V4L functionality missing in this case?
We are using Linux version 2.6.22.1. We have registered our EVB on TI website but there are no new updates for OMAP3503.

Thanks
Motra

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Re: V4L on OMAP3

[Ajit Motra]

I am not able to open device node, fd_v4l = open(v4l_device, O_RDWR) 
returns -1. I read documents and suspected that its read only. I tried 
with that also it still does not work. (crwxrwxrwx    1 504      
504       81,   0 Mar 12  2004 /dev/video0) is available in /dev. I have 
less experience with Linux but I have used color conversions using v4l 
in past. I was successful with framebuffer part. /dev/fb0 opens just ok 
and all ioctls are working fine for framebuffer on the same board.

Hiremath, Vaibhav wrote:

>Can you pleas tell me what kind of error message you are getting? And probably I may want to see your .config file.
>
>Thanks,
>Vaibhav Hiremath
>Senior Software Engg.
>Platform Support Products
>Texas Instruments Inc
>Ph: +91-80-25099927
>TI IP Ph: 509-9927
>http://dbdwss01.india.ti.com/pspproducts/
>
>-----Original Message-----
>From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Ajit Motra
>Sent: Thursday, June 26, 2008 1:39 PM
>To: linux-omap@vger.kernel.org
>Subject: V4L on OMAP3
>
>Hello,
>
> We received OMAP3 board from TI. This has linux from mistral on this. There is a node /dev/video0 on this but when I try to open this using O_RDONLY or O_RDWR option, this does not open device. Is V4L functionality missing in this case?
>We are using Linux version 2.6.22.1. We have registered our EVB on TI website but there are no new updates for OMAP3503.
>
>Thanks
>Motra
>
>--
>To unsubscribe from this list: send the line "unsubscribe linux-omap" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>  
>

RE: V4L on OMAP3

[Hiremath, Vaibhav]

Could you please tell me what exactly you are trying to do?

I am able to open the device /dev/video0 here at my end. Please verify your configuration file for all the required options. Here are my /dev/video nodes on my system -

[root@OMAP3EVM /]# ls -l /dev/video*
crw-rw----    1 root     root      81,   0 Jan  1 00:00 /dev/video0
crw-rw----    1 root     root      81,   1 Jan  1 00:00 /dev/video1
crw-rw----    1 root     root      81,   2 Jan  1 00:00 /dev/video2

Thanks,
Vaibhav Hiremath
Senior Software Engg.
Platform Support Products
Texas Instruments Inc
Ph: +91-80-25099927
TI IP Ph: 509-9927
http://dbdwss01.india.ti.com/pspproducts/

-----Original Message-----
From: Ajit Motra [mailto:motraat@iis.fraunhofer.de]
Sent: Thursday, June 26, 2008 2:06 PM
To: Hiremath, Vaibhav
Subject: Re: V4L on OMAP3

Hi,

  I am not able to open device node, fd_v4l = open(v4l_device, O_RDWR)
returns -1. I read documents and suspected that its read only. I tried
with that also it still does not work. (crwxrwxrwx    1 504
504       81,   0 Mar 12  2004 /dev/video0) is available in /dev. I have
less experience with Linux but I have used color conversions using v4l
in past. I was successful with framebuffer part. /dev/fb0 opens just ok
and all ioctls are working fine for framebuffer on the same board.

Regards
Ajit Motra
Hiremath, Vaibhav wrote:

>Can you pleas tell me what kind of error message you are getting? And probably I may want to see your .config file.
>
>Thanks,
>Vaibhav Hiremath
>Senior Software Engg.
>Platform Support Products
>Texas Instruments Inc
>Ph: +91-80-25099927
>TI IP Ph: 509-9927
>http://dbdwss01.india.ti.com/pspproducts/
>
>-----Original Message-----
>From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Ajit Motra
>Sent: Thursday, June 26, 2008 1:39 PM
>To: linux-omap@vger.kernel.org
>Subject: V4L on OMAP3
>
>Hello,
>
> We received OMAP3 board from TI. This has linux from mistral on this. There is a node /dev/video0 on this but when I try to open this using O_RDONLY or O_RDWR option, this does not open device. Is V4L functionality missing in this case?
>We are using Linux version 2.6.22.1. We have registered our EVB on TI website but there are no new updates for OMAP3503.
>
>Thanks
>Motra
>
>--
>To unsubscribe from this list: send the line "unsubscribe linux-omap" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>
>