DSS2 TV settings

DSS2 TV settings

[Gary Thomas]

Tomi,

I'm running your latest DSS2 tree and have some questions about
the TV settings.  The timings, as published, don't work all that
well on our TV sets.  When I display a frame buffer to the TV
(using the recipe from the Documentation directory), some of
the actual frame buffer does not show on the screen.  In particular,
if I have "tux" from the default system console framebuffer
showing, the top of his head is chopped off, as is a fair
amount of his left side.  Further tests show that some amount
of the frame buffer is not present on all margins.

Is this to be expected?
Can the timings be adjusted so that the whole frame buffer shows?

[not 100% related] The documentation says that TI is working on
the V4L2 support.  Do you know the status of this?  where I might
find it?

Thanks for your comments

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: DSS2 TV settings

[Tomi Valkeinen]

Hi,

On Wed, 2009-06-10 at 19:17 +0200, ext Gary Thomas wrote:
> Tomi,
> 
> I'm running your latest DSS2 tree and have some questions about
> the TV settings.  The timings, as published, don't work all that
> well on our TV sets.  When I display a frame buffer to the TV
> (using the recipe from the Documentation directory), some of
> the actual frame buffer does not show on the screen.  In particular,
> if I have "tux" from the default system console framebuffer
> showing, the top of his head is chopped off, as is a fair
> amount of his left side.  Further tests show that some amount
> of the frame buffer is not present on all margins.
> 
> Is this to be expected?
> Can the timings be adjusted so that the whole frame buffer shows?

That is to be expected. I'm not an expert on analog TVs, but I think
analog TVs always have non-visible areas. Some TVs show more of the
total frame, and some show less.

You need to adjust the overlay position and size so that it's fully
visible on the TV. I guess there are some sane defaults that are more or
less ok for every TV out there, and omapfb could use those defaults, but
I haven't really had time to study the TV out.

> 
> [not 100% related] The documentation says that TI is working on
> the V4L2 support.  Do you know the status of this?  where I might
> find it?

I cannot help you with this. There have been mails about it on
linux-omap and v4l2 lists, so you could search those archives.

 Tomi

Re: DSS2 TV settings

[halli manjunatha]

Hi Thomas,

>> [not 100% related] The documentation says that TI is working on
>> the V4L2 support.  Do you know the status of this?  where I might
>> find it?
>
> I cannot help you with this. There have been mails about it on
> linux-omap and v4l2 lists, so you could search those archives.

There is a public repository representing the V4L2 driver on the
Tomi's DSS patches.  Here is the link to that.

http://arago-project.org/git/people/vaibhav/ti-psp-omap-video.git?p=people/vaibhav/ti-psp-omap-video.git;a=shortlog;h=refs/heads/ti_display


On Thu, Jun 11, 2009 at 11:38 AM, Tomi
Valkeinen<tomi.valkeinen@nokia.com> wrote:
> Hi,
>
> On Wed, 2009-06-10 at 19:17 +0200, ext Gary Thomas wrote:
>> Tomi,
>>
>> I'm running your latest DSS2 tree and have some questions about
>> the TV settings.  The timings, as published, don't work all that
>> well on our TV sets.  When I display a frame buffer to the TV
>> (using the recipe from the Documentation directory), some of
>> the actual frame buffer does not show on the screen.  In particular,
>> if I have "tux" from the default system console framebuffer
>> showing, the top of his head is chopped off, as is a fair
>> amount of his left side.  Further tests show that some amount
>> of the frame buffer is not present on all margins.
>>
>> Is this to be expected?
>> Can the timings be adjusted so that the whole frame buffer shows?
>
> That is to be expected. I'm not an expert on analog TVs, but I think
> analog TVs always have non-visible areas. Some TVs show more of the
> total frame, and some show less.
>
> You need to adjust the overlay position and size so that it's fully
> visible on the TV. I guess there are some sane defaults that are more or
> less ok for every TV out there, and omapfb could use those defaults, but
> I haven't really had time to study the TV out.
>
>>
>> [not 100% related] The documentation says that TI is working on
>> the V4L2 support.  Do you know the status of this?  where I might
>> find it?
>
> I cannot help you with this. There have been mails about it on
> linux-omap and v4l2 lists, so you could search those archives.
>
>  Tomi
>
>
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>



-- 
Regards
Manjunatha H
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Re: DSS2 TV settings

[Gary Thomas]

halli manjunatha wrote:
> Hi Thomas,
> 
>>> [not 100% related] The documentation says that TI is working on
>>> the V4L2 support.  Do you know the status of this?  where I might
>>> find it?
>> I cannot help you with this. There have been mails about it on
>> linux-omap and v4l2 lists, so you could search those archives.
> 
> There is a public repository representing the V4L2 driver on the
> Tomi's DSS patches.  Here is the link to that.
> 
> http://arago-project.org/git/people/vaibhav/ti-psp-omap-video.git?p=people/vaibhav/ti-psp-omap-video.git;a=shortlog;h=refs/heads/ti_display
> 

Thanks for the pointer.

Which board(s) has this been tested with (so I can look at the configs)?
What are you using to test it with?

I noticed that your tree is 2.6.30-rc7, Tomi's is -rc8.  There are quite
a few differences (> 1MB patch file).  How can I reconcile what you've
changed with my working tree (which is based on Tomi's 2.6.30-rc8 tree)?

Thanks for any help

> On Thu, Jun 11, 2009 at 11:38 AM, Tomi
> Valkeinen<tomi.valkeinen@nokia.com> wrote:
>> Hi,
>>
>> On Wed, 2009-06-10 at 19:17 +0200, ext Gary Thomas wrote:
>>> Tomi,
>>>
>>> I'm running your latest DSS2 tree and have some questions about
>>> the TV settings.  The timings, as published, don't work all that
>>> well on our TV sets.  When I display a frame buffer to the TV
>>> (using the recipe from the Documentation directory), some of
>>> the actual frame buffer does not show on the screen.  In particular,
>>> if I have "tux" from the default system console framebuffer
>>> showing, the top of his head is chopped off, as is a fair
>>> amount of his left side.  Further tests show that some amount
>>> of the frame buffer is not present on all margins.
>>>
>>> Is this to be expected?
>>> Can the timings be adjusted so that the whole frame buffer shows?
>> That is to be expected. I'm not an expert on analog TVs, but I think
>> analog TVs always have non-visible areas. Some TVs show more of the
>> total frame, and some show less.
>>
>> You need to adjust the overlay position and size so that it's fully
>> visible on the TV. I guess there are some sane defaults that are more or
>> less ok for every TV out there, and omapfb could use those defaults, but
>> I haven't really had time to study the TV out.
>>
>>> [not 100% related] The documentation says that TI is working on
>>> the V4L2 support.  Do you know the status of this?  where I might
>>> find it?
>> I cannot help you with this. There have been mails about it on
>> linux-omap and v4l2 lists, so you could search those archives.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: DSS2 TV settings

[halli manjunatha]

On Thu, Jun 11, 2009 at 5:20 PM, Gary Thomas<gary@mlbassoc.com> wrote:
> halli manjunatha wrote:
>> Hi Thomas,
>>
>>>> [not 100% related] The documentation says that TI is working on
>>>> the V4L2 support.  Do you know the status of this?  where I might
>>>> find it?
>>> I cannot help you with this. There have been mails about it on
>>> linux-omap and v4l2 lists, so you could search those archives.
>>
>> There is a public repository representing the V4L2 driver on the
>> Tomi's DSS patches.  Here is the link to that.
>>
>> http://arago-project.org/git/people/vaibhav/ti-psp-omap-video.git?p=people/vaibhav/ti-psp-omap-video.git;a=shortlog;h=refs/heads/ti_display
>>
>
> Thanks for the pointer.
>
> Which board(s) has this been tested with (so I can look at the configs)?
> What are you using to test it with?

I have tested this on omap3 evm it's working fine. i just used some
v4l2 test apps to test the
video output

>
> I noticed that your tree is 2.6.30-rc7, Tomi's is -rc8.  There are quite
> a few differences (> 1MB patch file).  How can I reconcile what you've
> changed with my working tree (which is based on Tomi's 2.6.30-rc8 tree)?
>
> Thanks for any help
>
>> On Thu, Jun 11, 2009 at 11:38 AM, Tomi
>> Valkeinen<tomi.valkeinen@nokia.com> wrote:
>>> Hi,
>>>
>>> On Wed, 2009-06-10 at 19:17 +0200, ext Gary Thomas wrote:
>>>> Tomi,
>>>>
>>>> I'm running your latest DSS2 tree and have some questions about
>>>> the TV settings.  The timings, as published, don't work all that
>>>> well on our TV sets.  When I display a frame buffer to the TV
>>>> (using the recipe from the Documentation directory), some of
>>>> the actual frame buffer does not show on the screen.  In particular,
>>>> if I have "tux" from the default system console framebuffer
>>>> showing, the top of his head is chopped off, as is a fair
>>>> amount of his left side.  Further tests show that some amount
>>>> of the frame buffer is not present on all margins.
>>>>
>>>> Is this to be expected?
>>>> Can the timings be adjusted so that the whole frame buffer shows?
>>> That is to be expected. I'm not an expert on analog TVs, but I think
>>> analog TVs always have non-visible areas. Some TVs show more of the
>>> total frame, and some show less.
>>>
>>> You need to adjust the overlay position and size so that it's fully
>>> visible on the TV. I guess there are some sane defaults that are more or
>>> less ok for every TV out there, and omapfb could use those defaults, but
>>> I haven't really had time to study the TV out.
>>>
>>>> [not 100% related] The documentation says that TI is working on
>>>> the V4L2 support.  Do you know the status of this?  where I might
>>>> find it?
>>> I cannot help you with this. There have been mails about it on
>>> linux-omap and v4l2 lists, so you could search those archives.
>
> --
> ------------------------------------------------------------
> Gary Thomas                 |  Consulting for the
> MLB Associates              |    Embedded world
> ------------------------------------------------------------
>



-- 
Regards
Manjunatha H
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