Fix for Theater200 on Radeon x600 VIVO
b_diaconescu at yahoo.com
Fri Sep 7 13:27:00 PDT 2007
Hi, the default case in RADEONVIP_reset setting
VIPH_CONTROL to 0x003F0004 is an error according to
the documentation I have. The LSB sets the divider for
te VIP clock and should be an even number, odd numbers
being not allowed. That should be the reason your
RT200 was not recognized. Adding the case for your
card is a good solution.
Writing a kernel driver that will be used by v4L
application to control the tuner and RT200 could be a
solution in moving towards changing avview with a
different aplication. Now xv is used by avview to
control the tuner through i2c bus.
--- Maciej Cencora <m.cencora at gmail.com> wrote:
> Hi all,
> If you are interested only in the solution, scroll
> to bottom.
> My name is Maciej Cencora. I've been using Linux
> since couple of years
> and since mainly I'm a programmer (mostly PHP/HTML,
> but also C/C++) I
> decided to start contributing a month ago. At that
> moment I knew nothing
> about how to write a kernel driver or how radeon or
> theater chip is build.
> I decided to choose one of my i-work-only-on-windows
> devices. First was
> bluetooth usb dongle, but after kernel upgrade it
> started working.
> Second - scanner in Lexmark x1195 - hmm, not very
> interesting. So I've
> chosen Rage Theater on my X600 Pro VIVO HDTV(rv380)
> card (in xorg.log it
> showed no response from all VIP buses).
> I began with reading "Linux Device Drivers" e-book,
> and studying xorg
> ati driver source code. I wrote small kernel module,
> that was supposed
> to check if theater chip exists (almost ripped off
> from theater_detect.c
> :) Unfortunatly it didn't worked.
> Using SoftIce I was investigating 2 regs
> (VIPH_REG_DATA, VIPH_REG_ADDR)
> in Windows, and with help of theater_detect source
> code I found out that
> theater chip is connected to second VIP bus (nr 1).
> Then my module was
> torturing that bus in Linux, but no success. I
> thought that there are
> some timing issues, that I won't be able to deal
> with without a
> documentation. I was very disappointed, and almost
> were about to abandon
> this short linux developer adventure.
> But after a week I decided to try one more time,
> with hope that it's not
> a timing issue. Logically thinking if I got no
> response from any bus,
> maybe those buses are disabled by default to save
> power. So there must
> be some register that controls those buses and
> surprisingly its called
> VIPH_CONTROL ;) In Linux that reg contains value
> 0x003F0004, and in
> Windows it is 0x003F000D. And that's it! Change two
> bits, and it works:)
> The rest was piece of cake: find where to program
> that reg and recompile
> radeon driver.
> Additional case statement in RADEONVIP_reset
> function (radeon_vip.c)
> with OUTREG(VIPH_CONTROL, 0x003F000D) (remaining
> OUTREGS copied from
> default case).
> I've checked it using avview. Composite input works
> almost perfectly
> (image vibrates a little), and s-video input gives
> very corrupted image
> (but works). Are there any other programs like
> FURTHER DEVELOPEMENT:
> What I think about is a kernel V4L theater driver,
> that would use 3
> functions (reset, read or write to VIP bus) exported
> by radeonfb or
> modesetting driver (once it goes to kernel). Is it
> doable, or maybe I
> should live it alone. Any ideas?
> What about licenses, because there will be much copy
> and paste from xorg
> ati driver code which is MIT, and I want kernel
> module to be GPL2, maybe
> Maciej Cencora
> xorg mailing list
> xorg at lists.freedesktop.org
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