Re: Changes to via_drv.o solving problems of hardwired devices.

On Wed, 11 May 2005, Damian Janusz Gruszka wrote:
> On Wed, May 11, 2005, Luc Verhaegen wrote:
>> On Mon, May 09, 2005 at 02:51:59PM +0200, damian gruszka wrote:

>>> to support "hardwired" TV and LVDS devices, which doesn't apear on I2O
>>> bus I suggest following changes.
>>> The Option ConnectedDevice set the correesponding field in
>>> VIABIOSInfo.Since my routine and the the "switch" for ActiveDevice
>>> are quite similar, I also risked to replace  this code  by  new
>>> visually shorter  code.

>>> via.patch  - contains combined changes done to  .c and .h files.
>>> via_driver.c.patch, via_bios.h.patch and via_bios.c.patch - patches in
>>> separate files.

>> You're grabbing a value from the CrtC registers [0x3d4/5] but your
>> comments state SR32. SR tends to imply Sequencer register [0x3c4/5].
>> Please at least adjust one or the other.

>> How global is this? I wouldn't be one bit surprised if this was all very
>> kontron specific. I've been bashed by igel over something their bios did
>> differently than the via bios (memory sizing), so this wouldn't exactly
>> be a first.

>> Also, from a quick review of the docs i scraped together, it seems that
>> CR3E is the BIOS initialised active device listing. At least it seems to
>> be that on the epia M. Then there's SR12, which (somewhat) outlines
>> which is connected where...

> I wanted to use SR32, witch should reflect connected devices as stated in
> VIA's video bios interface specs.
> Basically it should be OEM's independent. But I found some BIOS versions
> that doesn't handle it correctly.
> Instead of correction (SR vs. CR), I redesigned this procedure to use int
> 0x10 Function 0x4f14  bx=4
> (video bios interface specs).

This has now been committed.  Thanks for the patch.

Marc.

+----------------------------------+-----------------------------------+
|  Marc Aurele La France           |  work:   1-780-492-9310           |
|  Academic Information and        |  fax:    1-780-492-1729           |
|    Communications Technologies   |  email:  [email protected]          |
|  352 General Services Building   +-----------------------------------+
|  University of Alberta           |                                   |
|  Edmonton, Alberta               |     Standard disclaimers apply    |
|  T6G 2H1                         |                                   |
|  CANADA                          |                                   |
+----------------------------------+-----------------------------------+
XFree86 developer and VP.  ATI driver and X server internals.