TQM5200 + SM501 FB

TQM5200 + SM501 FB

[Rolf Offermanns]

Hi All,

does anyone has a working SM501 framebuffer on the STK5200 board? The 
board itself works fine on the 2.6.32 kernel.

I got a patch from TQ which used to work around 2.6.24 but it seems with 
the unification of the "simple mpc5200" boards the sm501 support got lost.

I toyed around with the patch a bit and I got the driver to probe and 
initialize the chip, but I don't get an output on the crt port and an 
open() on /dev/fb0 or /dev/fb1 fails with "no device".

Any hints are welcome.

Thanks,
Rolf.

Re: TQM5200 + SM501 FB

[Wolfgang Denk]

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Dear Rolf Offermanns,

In message <4B191B54.6030804@sysgo.com> you wrote:
> 
> does anyone has a working SM501 framebuffer on the STK5200 board? The 
> board itself works fine on the 2.6.32 kernel.

This is a pretty well supported configuration.


> I got a patch from TQ which used to work around 2.6.24 but it seems with 
> the unification of the "simple mpc5200" boards the sm501 support got lost.

Don't expect any real support from TQ on this; so far they never
spent any efforts on the arch/powerpc port of the TQM5200.

> I toyed around with the patch a bit and I got the driver to probe and 
> initialize the chip, but I don't get an output on the crt port and an 
> open() on /dev/fb0 or /dev/fb1 fails with "no device".

Did you check if you eventually have forgotten to enable Framebuffer
console in your kernel configuration? Make sure to set:

 Device Drivers  --->
   Character devices  --->
     [*] Virtual terminal
     [*]   Support for console on virtual terminal (NEW)

   ...
   Multifunction device drivers  ---> 
     <*> Support for Silicon Motion SM501

   ...
   Graphics support  --->
     <*> Support for frame buffer devices  --->
       [*]   Framebuffer foreign endianness support  --->
         Choice endianness support (Support for Big- and Little-Endian framebuffers)  --->
       ...
       <*>   Silicon Motion SM501 framebuffer support

     ...
     Console display driver support  --->
       [ ] VGA text console      (! disable VGA text console!)
       <*> Framebuffer Console support


Please find attached below a patch which fixes some issues (but we
don't consider it clean enough for inclusion into mainline yet), and a
known to be working config file. [Kudos to Anatolij for providing
this.]

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
What was sliced bread the greatest thing since?


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[-- Attachment #3: config-tqm5200-sm501.gz --]
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Re: TQM5200 + SM501 FB

[Rolf Offermanns]

Am 04.12.2009 um 23:04 schrieb Wolfgang Denk:

> Please find attached below a patch which fixes some issues (but we
> don't consider it clean enough for inclusion into mainline yet), and a
> known to be working config file. [Kudos to Anatolij for providing
> this.]
>=20

Thanks Wolfgang, I will try it on monday. What needs to be done to get =
this into mainline?

Modify the sm501 stuff for fdt and extend the tqm5200.dts file with the =
sm501 resources?

-Rolf=

Re: TQM5200 + SM501 FB

[Wolfgang Denk]

Dear Rolf Offermanns,

In message <F5B2E7AE-A0C5-4D9B-AF8F-3158B94D6236@sysgo.com> you wrote:
> 
> Thanks Wolfgang, I will try it on monday. What needs to be done to get
> this into mainline?
> 
> Modify the sm501 stuff for fdt and extend the tqm5200.dts file with the
> sm501 resources?

Right, especially the OF bindings in the SM501 driver and the device
tree entries are still missing.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
He'd been wrong, there _was_ a light at the end of the tunnel, and it
was a flamethrower.                         - Terry Pratchett, _Mort_