From mboxrd@z Thu Jan  1 00:00:00 1970
Message-Id: <5.1.0.14.0.20010826220745.00cf2cb0@pop.noos.fr>
To: 9fans@cse.psu.edu
From: Philippe Anel <philippe.anel@noos.fr>
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Subject: [9fans] G4xx Driver Bundle, /lib/vgadb, Vesa DPMS, Howto and  Help
 needed...
Date: Sun, 26 Aug 2001 22:20:54 +0200
Topicbox-Message-UUID: e68cdb70-eac9-11e9-9e20-41e7f4b1d025

  Dear Plan9 users

You'll find attached the newest version of the G400 and G450 cards
driver.  Unfortunatly, the 2D accel feature isn't yet implemented for
I wasn't home last week.  I'm working on it and I ask you to be
patient a little more

In order to install this driver, you must run this bundle (man bundle)
which will copy two files "vgamga4xx.c" in "/sys/src/9/pc" and
"mga4xx" in "/sys/src/cmd/aux/vga".  After that, you must do the
following :

In the directory /sys/src/cmd/aux/vga : in the file "data.c", you must
add the two next lines to ctlrs[] :

--------------------------------------------cut-here----
         &mga4xx,
         &mga4xxhwgc,
--------------------------------------------cut-here----

In the file "mkfile", you must add the line to OFILES :

--------------------------------------------cut-here----
         mga4xx.$O       \
--------------------------------------------cut-here----

In the file "vga.h", ou must add the two next lines :

--------------------------------------------cut-here----
         extern Ctlr mga4xx;
         extern Ctlr mga4xxhwgc;
--------------------------------------------cut-here----

In the directory /sys/src/9/pc (or alphapc - alpha not tested though):
in your kernel config file ("pcdisk" for example) add the next line :

--------------------------------------------cut-here----
         vgamga4xx       +cur
--------------------------------------------cut-here----

Finally here are a few lines from my /lib/vgadb :

--------------------------------------------cut-here----
ctlr
         0xC002D="MATROX/Matrox G400"
         0xC002D="MATROX/Matrox G450"
         link=vga
         ctlr=mga4xx linear=1
         hwgc=mga4xxhwgc
--------------------------------------------cut-here----

I hope everything will be all right on your config and I wait for any
feedback.  However, I found two bugs as of yet which I cant seem to be
able to get rid off :

  First, the resolutions 1920x1440x8 and 1800x1350x8 don't work on my
computer .. sounds like the hsync and vsync were badly set. But I took
the following values (for my vgadb) with the help of xvidtune from
X11R6. (Here are my vgadb monitor lines)

         #
         # IIYAMA Vision Master Pro 450
         #
         a901ht
         videobw=300
                 alias=multisync
         a901ht = 1920x1440
                 defaultclock=297
                 shb=2064 ehb=2288 ht=2640
                 shs=2030
                 vrs=1441 vre=1444 vt=1500
                 hsync=- vsync=-
         a901ht = 1800x1350              # 60Hz, 89.4KHz
                defaultclock=220         # 219.5MHz @ 1800x1440
                shb=1872 ehb=2128 ht=2248
                shs=1824 ehs=1896
                vrs=1356 vre=1368 vt=1394
         a901ht = 1600x1200              # 72Hz, 90.0KHz
                defaultclock=200         # 195.9MHz
                shb=1664 ehb=2088 ht=2144
                shs=1648
                vrs=1202 vre=1208 vt=1240
         a901ht = 1024x768
                clock=79
                include=1024x768

The driver features some code to take care of the blanking directly
with the hardware. In order to take care of the various blanking modes,
I've used a variable in plan9.ini, which can take the following values :

         *dpms=off
         *dpms=suspend
         *dpms=standby

However, the 32 bits mode runs strangely.  The CRTC seems correctly
initialized since I can see the mouse cursor. But nothing's printed on
the screen !.  But when launching "rio", the screen becomes black (the
frame buffer seems full) !.  When I click on the right mouse button,
the menu appears with the current selection on mauve/purple. So, it
seems the CRTC and the DAC ( for the pixel clock at least) are
correctly initialized.  if someone happens to come by an idea, or a
patch to fix one or both problems, please, tell me for I'm interested
by any suggestion and/or comment.

         Philippe,

PS: I've decided not to support 15 or 16 bits resolutions which I
consider being fake modes and only for game addicts (no hard feeling there).
If, however, some of you are interested by these color depth, I'll add them
when the driver will be finished (after the bugs fix and after the 2d
accel feature).

PS2: a thousand apologizes to Kenji Okatomo and to Carl D. Todaro for
not having replied faster than that. I hope this message will help
them to forgive me.