OMAP [TV] video

OMAP [TV] video

[Gary Thomas]

I'm trying to get TV [S-Video] working on my 3530 board.
The settings in the current kernel don't seem to work very
well on my TV (U.S. NTSC, standard).  Comparing the video
encoder setup with the suggested values in the manual, I
find many differences, mostly with respect to the framing
(signal shaping).

Questions:
* Are the settings in the kernel tree known to work [as is]?
* Why the divergence from the recommended values?

Any ideas or helpful pointers would be graciously accepted

Thanks

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

RE: OMAP [TV] video

[Hiremath, Vaibhav]

Thanks,
Vaibhav Hiremath
> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of Gary Thomas
> Sent: Tuesday, February 10, 2009 9:35 PM
> To: Linux OMAP
> Subject: OMAP [TV] video
> 
> I'm trying to get TV [S-Video] working on my 3530 board.
> The settings in the current kernel don't seem to work very
> well on my TV (U.S. NTSC, standard).  Comparing the video
> encoder setup with the suggested values in the manual, I
> find many differences, mostly with respect to the framing
> (signal shaping).
> 
> Questions:
> * Are the settings in the kernel tree known to work [as is]?
> * Why the divergence from the recommended values?
> 
> Any ideas or helpful pointers would be graciously accepted
> 
[Hiremath, Vaibhav] Can you provide some more details like,

Which kernel version are you using?
Are you using DSS2 for TV out?
Which board you are using, (must be EVM)?

> Thanks
> 
> --
> ------------------------------------------------------------
> Gary Thomas                 |  Consulting for the
> MLB Associates              |    Embedded world
> ------------------------------------------------------------
> --
> To unsubscribe from this list: send the line "unsubscribe linux-
> omap" in
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Re: OMAP [TV] video

[Gary Thomas]

Hiremath, Vaibhav wrote:
> 
> Thanks,
> Vaibhav Hiremath
>> -----Original Message-----
>> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
>> owner@vger.kernel.org] On Behalf Of Gary Thomas
>> Sent: Tuesday, February 10, 2009 9:35 PM
>> To: Linux OMAP
>> Subject: OMAP [TV] video
>>
>> I'm trying to get TV [S-Video] working on my 3530 board.
>> The settings in the current kernel don't seem to work very
>> well on my TV (U.S. NTSC, standard).  Comparing the video
>> encoder setup with the suggested values in the manual, I
>> find many differences, mostly with respect to the framing
>> (signal shaping).
>>
>> Questions:
>> * Are the settings in the kernel tree known to work [as is]?
>> * Why the divergence from the recommended values?
>>
>> Any ideas or helpful pointers would be graciously accepted
>>
> [Hiremath, Vaibhav] Can you provide some more details like,
> 
> Which kernel version are you using?

I started with the "official" OMAP tree (git://git.omapzoom.org/repo/omapkernel.git)

If there is a better starting point, I'd certainly like to know.
Trying to find the correct tree to use is challenging.

> Are you using DSS2 for TV out?

Not sure exactly what that means.  Again, trying to follow this
development is not straight forward - it seems that those who
know the answers assume that everyone does, so why bother explaining
anything?  (Maybe that's a bit cynical, but my experience so far)

> Which board you are using, (must be EVM)?

It's a new board under development, more or less like the beagle.

Again, I'd appreciate any help or pointers.  Thanks

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

Re: OMAP [TV] video

[Koen Kooi]

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Op 11 feb 2009, om 13:25 heeft Gary Thomas het volgende geschreven:

> Hiremath, Vaibhav wrote:
>>
>> Thanks,
>> Vaibhav Hiremath
>>> -----Original Message-----
>>> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
>>> owner@vger.kernel.org] On Behalf Of Gary Thomas
>>> Sent: Tuesday, February 10, 2009 9:35 PM
>>> To: Linux OMAP
>>> Subject: OMAP [TV] video
>>>
>>> I'm trying to get TV [S-Video] working on my 3530 board.
>>> The settings in the current kernel don't seem to work very
>>> well on my TV (U.S. NTSC, standard).  Comparing the video
>>> encoder setup with the suggested values in the manual, I
>>> find many differences, mostly with respect to the framing
>>> (signal shaping).
>>>
>>> Questions:
>>> * Are the settings in the kernel tree known to work [as is]?
>>> * Why the divergence from the recommended values?
>>>
>>> Any ideas or helpful pointers would be graciously accepted
>>>
>> [Hiremath, Vaibhav] Can you provide some more details like,
>>
>> Which kernel version are you using?
>
> I started with the "official" OMAP tree (git://git.omapzoom.org/repo/ 
> omapkernel.git)
>
> If there is a better starting point, I'd certainly like to know.

The right one is at http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git;a=shortlog

regards,

Koen


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OMAP TV video

[Gary Thomas]

Note: if this is the wrong list, or if there's a better place
to ask these questions, please redirect me.

I have an OMAP/Zoom1 (3430 LDP).  I'm trying to use the
S-Video output, without much success.  Today, I grabbed
the latest tree (as least from what I can gather from various
web pages) from git://git.omapzoom.org/repo/omapkernel.git

When I try to use the TV, the kernel crashes immediately:
Unhandled fault: external abort on non-linefetch (0x1008) at 0xd8050440
Internal error: : 1008 [#1]
Modules linked in:

CPU: 0    Not tainted  (2.6.27.10-omap1-00181-gc9fd795 #1)
PC is at omap2_disp_enable_output_dev+0x30/0x44
LR is at write_layer_out+0x118/0x220
pc : [<c0053a84>]    lr : [<c018f3d4>]    psr: 60000013
sp : c7963ec8  ip : c7963ed8  fp : c7963ed4
r10: c7963f70  r9 : c7940e78  r8 : c039c8f0
r7 : 00000000  r6 : 00000003  r5 : c78626f8  r4 : c03c3c44
r3 : 00000000  r2 : d8050000  r1 : 00000003  r0 : 00000005
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 00c5387f  Table: 87320018  DAC: 00000015
Process echo (pid: 723, stack limit = 0xc79622e0)

kernel version: Linux version 2.6.27.10-omap1-00181-gc9fd795
config: omap_ldp_defconfig

Notes:
* An older kernel (circa 2008-12-01) does not crash.  The
  TV output is not correct, but at least it doesn't crash.
* How can I turn off the double printk()?  All kernel messages
  get duplicated and it makes it terribly hard to use.  e.g.

    <5>Looking up port of RPC 100003/2 on 192.168.1.100
    Looking up port of RPC 100003/2 on 192.168.1.100
    <5>Looking up port of RPC 100005/1 on 192.168.1.100
    Looking up port of RPC 100005/1 on 192.168.1.100
    VFS: Mounted root (nfs filesystem).
    VFS: Mounted root (nfs filesystem).

  Other kernels (PowerPC, etc) don't suffer from this.
* This kernel version is very unstable - it simply quits after
  just a few moments of running.  I didn't see this with the
  older kernel.

Thanks for any ideas/pointers

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

Re: OMAP TV video

[Imre Deak]

On Wed, Feb 04, 2009 at 03:57:37PM +0100, ext Gary Thomas wrote:
> Note: if this is the wrong list, or if there's a better place
> to ask these questions, please redirect me.
> 
> I have an OMAP/Zoom1 (3430 LDP).  I'm trying to use the
> S-Video output, without much success.  Today, I grabbed
> the latest tree (as least from what I can gather from various
> web pages) from git://git.omapzoom.org/repo/omapkernel.git
> 
> When I try to use the TV, the kernel crashes immediately:
> Unhandled fault: external abort on non-linefetch (0x1008) at 0xd8050440

I'm guessing that the external abort is caused by the DSS interface
clock being disabled.

--Imre

> Internal error: : 1008 [#1]
> Modules linked in:
> 
> CPU: 0    Not tainted  (2.6.27.10-omap1-00181-gc9fd795 #1)
> PC is at omap2_disp_enable_output_dev+0x30/0x44
> LR is at write_layer_out+0x118/0x220
> pc : [<c0053a84>]    lr : [<c018f3d4>]    psr: 60000013
> sp : c7963ec8  ip : c7963ed8  fp : c7963ed4
> r10: c7963f70  r9 : c7940e78  r8 : c039c8f0
> r7 : 00000000  r6 : 00000003  r5 : c78626f8  r4 : c03c3c44
> r3 : 00000000  r2 : d8050000  r1 : 00000003  r0 : 00000005
> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
> Control: 00c5387f  Table: 87320018  DAC: 00000015
> Process echo (pid: 723, stack limit = 0xc79622e0)
> 
> kernel version: Linux version 2.6.27.10-omap1-00181-gc9fd795
> config: omap_ldp_defconfig
> 
> Notes:
> * An older kernel (circa 2008-12-01) does not crash.  The
>   TV output is not correct, but at least it doesn't crash.
> * How can I turn off the double printk()?  All kernel messages
>   get duplicated and it makes it terribly hard to use.  e.g.
> 
>     <5>Looking up port of RPC 100003/2 on 192.168.1.100
>     Looking up port of RPC 100003/2 on 192.168.1.100
>     <5>Looking up port of RPC 100005/1 on 192.168.1.100
>     Looking up port of RPC 100005/1 on 192.168.1.100
>     VFS: Mounted root (nfs filesystem).
>     VFS: Mounted root (nfs filesystem).
> 
>   Other kernels (PowerPC, etc) don't suffer from this.
> * This kernel version is very unstable - it simply quits after
>   just a few moments of running.  I didn't see this with the
>   older kernel.
> 
> Thanks for any ideas/pointers
> 
> --
> ------------------------------------------------------------
> Gary Thomas                 |  Consulting for the
> MLB Associates              |    Embedded world
> ------------------------------------------------------------
> --
> 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: OMAP TV video

[Gary Thomas]

Imre Deak wrote:
> On Wed, Feb 04, 2009 at 03:57:37PM +0100, ext Gary Thomas wrote:
>> Note: if this is the wrong list, or if there's a better place
>> to ask these questions, please redirect me.
>>
>> I have an OMAP/Zoom1 (3430 LDP).  I'm trying to use the
>> S-Video output, without much success.  Today, I grabbed
>> the latest tree (as least from what I can gather from various
>> web pages) from git://git.omapzoom.org/repo/omapkernel.git
>>
>> When I try to use the TV, the kernel crashes immediately:
>> Unhandled fault: external abort on non-linefetch (0x1008) at 0xd8050440
> 
> I'm guessing that the external abort is caused by the DSS interface
> clock being disabled.

How can I fix it?  Am I missing some setup?

How am I supposed to use the S-Video (TV) interface?  Currently,
I'm executing this (which used to work):
  echo tv >/sys/class/display_control/omap_disp_control/graphics

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

Re: OMAP TV video

[Gary Thomas]

Gary Thomas wrote:
> Imre Deak wrote:
>> On Wed, Feb 04, 2009 at 03:57:37PM +0100, ext Gary Thomas wrote:
>>> Note: if this is the wrong list, or if there's a better place
>>> to ask these questions, please redirect me.
>>>
>>> I have an OMAP/Zoom1 (3430 LDP).  I'm trying to use the
>>> S-Video output, without much success.  Today, I grabbed
>>> the latest tree (as least from what I can gather from various
>>> web pages) from git://git.omapzoom.org/repo/omapkernel.git
>>>
>>> When I try to use the TV, the kernel crashes immediately:
>>> Unhandled fault: external abort on non-linefetch (0x1008) at 0xd8050440
>> I'm guessing that the external abort is caused by the DSS interface
>> clock being disabled.
> 
> How can I fix it?  Am I missing some setup?
> 
> How am I supposed to use the S-Video (TV) interface?  Currently,
> I'm executing this (which used to work):
>   echo tv >/sys/class/display_control/omap_disp_control/graphics

Interestingly, this sort of worked (no kernel crash) when I
disabled Power Management.  Sadly, it quit/vanished after some
scant few seconds...

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