RE: MPC823 and LCD?

RE: MPC823 and LCD?

[Steven Blakeslee]

check out drivers/video/rpxfb.c

-----Original Message-----
From: Steven Scholz [mailto:steven.scholz@imc-berlin.de]
Sent: Monday, September 29, 2003 11:52 AM
To: Linuxppc-Embedded
Subject: MPC823 and LCD?



Hi there,

two questions about MPC823 and LCD:

1. Has someone a working driver for linux > 2.4.20?
2. what's the difference between lcd823.c and video823.c in linux-2.4.4 from
DENX?

Thanks,

Steven


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Re: MPC823 and LCD?

[Steven Scholz]

Steven,

>> 1. Has someone a working driver for linux > 2.4.20?
> check out drivers/video/rpxfb.c

Thanks for that hint.
Is this driver in any way special to RPX boards?
Or could we make it available to other MPC823 boards as well?

IIRC the lcd823.c driver in DENX kernel is quite generic.

Thanks,

Steven


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Re: MPC823 and LCD?

[Dan Malek]

Steven Scholz wrote:

> Is this driver in any way special to RPX boards?
> Or could we make it available to other MPC823 boards as well?

Hmmmm.....interesting how the driver I wrote becomes MV copyrighted...
Oh well.

There isn't anything uniqe to the RPX boards in the driver, only
the LCD type.  The original one had some backlight/touchscreen
stuff in it, but I see that is gone now.

The lcd driver is for an LCD screen, the video driver is for YUV
mode composite/S-Video output.


	-- Dan


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Re: MPC823 and LCD?

[Steven Scholz]

Dan Malek wrote:

>> Is this driver in any way special to RPX boards?
>> Or could we make it available to other MPC823 boards as well?
>
>
> Hmmmm.....interesting how the driver I wrote becomes MV copyrighted...
> Oh well.
:-(

> There isn't anything uniqe to the RPX boards in the driver, only
> the LCD type.  The original one had some backlight/touchscreen
> stuff in it, but I see that is gone now.
Ok. So we could move the code into a drivers/video/lcd823.c (or mpc823fb.c), put
your Copyrigth back in and make it available to all MPC823 boards.

Ok?
Objections?

> The lcd driver is for an LCD screen, the video driver is for YUV
> mode composite/S-Video output.

Thanks,

Steven


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Re: MPC823 and LCD?

[Dan Malek]

Steven Scholz wrote:

> Ok. So we could move the code into a drivers/video/lcd823.c (or
> mpc823fb.c), put your Copyrigth back in and make it available to all
> MPC823 boards.

How different are these drivers?  You mentioned Wolfgang's version
is "more generic"?  I know lots of people have touched this driver
since the beginning of time, and I think Scott Anderson actually
made it look pretty :-)  I think if the driver remains LCD only,
we need to keep that as part of the name (like lcd823fb.c).  If someone
merges the LCD and YUV video into one driver, then call it something
like mpc823fb.c....I don't care so much about the copyright update
as the loss of the history of people that have worked on it.


Thanks.


	-- Dan


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Re: MPC823 and LCD?

[Steven Scholz]

Dan,

>> Ok. So we could move the code into a drivers/video/lcd823.c (or
>> mpc823fb.c), put your Copyrigth back in and make it available to all
>> MPC823 boards.
>
> How different are these drivers?  You mentioned Wolfgang's version
> is "more generic"?
Am I not sure. I'll have a look though.

 > I know lots of people have touched this driver
> since the beginning of time, and I think Scott Anderson actually
> made it look pretty :-)
:o)

 > I think if the driver remains LCD only,
> we need to keep that as part of the name (like lcd823fb.c).  If someone
> merges the LCD and YUV video into one driver, then call it something
> like mpc823fb.c....
Good point.
I think we should keep it seperated.

 > I don't care so much about the copyright update
> as the loss of the history of people that have worked on it.
:o)

Ok. As I said I'll have a look.

Cheers,

Steven


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Re: MPC823 and LCD?

[Scott Anderson]

On Wednesday, October 1, 2003, at 08:35  AM, Dan Malek wrote:
> I know lots of people have touched this driver
> since the beginning of time, and I think Scott Anderson actually
> made it look pretty :-)

Thanks for the credit, but it wasn't me.  First fb  I touched
was the one I did for the Xilinx ML300.

    Scott


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RE: MPC823 and LCD?

[Steven Blakeslee]

It should work on all 823E boards.  Specific support for your LCD may be
required.

-----Original Message-----
From: Steven Scholz [mailto:steven.scholz@imc-berlin.de]
Sent: Tuesday, September 30, 2003 7:18 AM
To: Steven Blakeslee
Cc: Linuxppc-Embedded
Subject: Re: MPC823 and LCD?


Steven,

>> 1. Has someone a working driver for linux > 2.4.20?
> check out drivers/video/rpxfb.c

Thanks for that hint.
Is this driver in any way special to RPX boards?
Or could we make it available to other MPC823 boards as well?

IIRC the lcd823.c driver in DENX kernel is quite generic.

Thanks,

Steven


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MPC823 and LCD?

[Steven Scholz]

Hi there,

two questions about MPC823 and LCD:

1. Has someone a working driver for linux > 2.4.20?
2. what's the difference between lcd823.c and video823.c in linux-2.4.4 from DENX?

Thanks,

Steven


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Re: MPC823 and LCD?

[Tom Rini]

On Mon, Sep 29, 2003 at 05:51:49PM +0200, Steven Scholz wrote:

>
> Hi there,
>
> two questions about MPC823 and LCD:
>
> 1. Has someone a working driver for linux > 2.4.20?

I believe what is in 2_4_devel worked as of 2.4.21 at least (and maybe
2.4.22-pre/rc?) and should still be OK.

--
Tom Rini
http://gate.crashing.org/~trini/

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RE: MPC823 and LCD?

[Wolfgang Grandegger]

>-- Original Message --
>Date: Mon, 29 Sep 2003 17:51:49 +0200
>From: Steven Scholz <steven.scholz@imc-berlin.de>
>To: Linuxppc-Embedded <linuxppc-embedded@lists.linuxppc.org>
>Subject: MPC823 and LCD?
>
>
>
>Hi there,
>
>two questions about MPC823 and LCD:
>
>1. Has someone a working driver for linux > 2.4.20?

It'm not sure if we have already ported over our LCD
drivers from 2.4.4 to 2.4.20 but Wolfgang can clarify
this, I think.

>2. what's the difference between lcd823.c and video823.c in linux-2.4.4
from
>DENX?

The MPC823 has an interface for LCD displays but also for
video monitors (NTSC/PAL) through a video encoder, typically
a AD7176/7/9. Please have a look to the processor manual for
further information.

Wolfgang.
\x18
Wolfgang


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