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Subject[PATCH] G450 support for matroxfb
Hi,
if there are unhappy owners of Matrox G450, I have gift for them.
Patch below is for 2.4.0-test11, and works on my dualhead G450,
16MB, DDR.

Because of there are no specs for this piece of hardware, currently:
(1) BIOS have to initialize hardware. Although chip presents
itself as G400, there is at least one additional PCI configuration
register :-( Not talking about completely new RAMDAC portion,
new memory interface, and so on... Hit them with big stick.
(2) Second head does not work. No spec, no game... Maybe after I
find some spare time.
(3) DAC is limited to 500MHz. Mine goes up to 959MHz, but without
datasheet I want to be conservative. It was very hard to get
this one piece...
(4) Everything is based on my piece of hardware; if it does not work
for you, complain loudly...

BTW, XF4.0.1e is also very unhappy on this hardware.
Best regards,
Petr Vandrovec
vandrove@vc.cvut.cz



diff -urdN linux/Documentation/Configure.help linux/Documentation/Configure.help
--- linux/Documentation/Configure.help Sat Nov 18 00:43:42 2000
+++ linux/Documentation/Configure.help Fri Nov 24 19:24:38 2000
@@ -3210,9 +3210,9 @@
CONFIG_FB_MATROX
Say Y here if you have a Matrox Millennium, Matrox Millennium II,
Matrox Mystique, Matrox Mystique 220, Matrox Productiva G100, Matrox
- Mystique G200, Matrox Millennium G200, Matrox Marvel G200 video or
- Matrox G400 card in your box. At this time, support for the G100,
- Mystique G200 and Marvel G200 is untested.
+ Mystique G200, Matrox Millennium G200, Matrox Marvel G200 video,
+ Matrox G400 or G450 card in your box. At this time, support for the G100
+ is untested and support for G450 is highly experimental.

This driver is also available as a module ( = code which can be
inserted and removed from the running kernel whenever you want).
@@ -3241,13 +3241,13 @@
packed pixel and 32 bpp packed pixel. You can also use font widths
different from 8.

-Matrox G100/G200/G400 support
+Matrox G100/G200/G400/G450 support
CONFIG_FB_MATROX_G100
- Say Y here if you have a Matrox Productiva G100, Matrox Mystique
- G200, Matrox Marvel G200 or Matrox Millennium G200 video card. If
- you select "Advanced lowlevel driver options", you should check 8
- bpp packed pixel, 16 bpp packed pixel, 24 bpp packed pixel and 32
- bpp packed pixel. You can also use font widths different from 8.
+ Say Y here if you have a Matrox G100, G200, G400 or G450 based
+ video card. If you select "Advanced lowlevel driver options", you
+ should check 8 bpp packed pixel, 16 bpp packed pixel, 24 bpp packed
+ pixel and 32 bpp packed pixel. You can also use font widths
+ different from 8.

If you need support for G400 secondary head, you must first say Y to
"I2C support" and "I2C bit-banging support" in the character devices
@@ -3270,6 +3270,8 @@

Matrox G400 second head support
CONFIG_FB_MATROX_MAVEN
+ WARNING !!! This support does not work with G450 !!!
+
Say Y or M here if you want to use a secondary head (meaning two
monitors in parallel) on G400 or MGA-TVO add-on on G200. Secondary
head is not compatible with accelerated XFree 3.3.x SVGA servers -
diff -urdN linux/drivers/video/Config.in linux/drivers/video/Config.in
--- linux/drivers/video/Config.in Mon Sep 18 22:15:22 2000
+++ linux/drivers/video/Config.in Fri Nov 24 19:16:18 2000
@@ -104,7 +104,7 @@
if [ "$CONFIG_FB_MATROX" != "n" ]; then
bool ' Millennium I/II support' CONFIG_FB_MATROX_MILLENIUM
bool ' Mystique support' CONFIG_FB_MATROX_MYSTIQUE
- bool ' G100/G200/G400 support' CONFIG_FB_MATROX_G100
+ bool ' G100/G200/G400/G450 support' CONFIG_FB_MATROX_G100
if [ "$CONFIG_I2C" != "n" ]; then
dep_tristate ' Matrox I2C support' CONFIG_FB_MATROX_I2C $CONFIG_FB_MATROX $CONFIG_I2C_ALGOBIT
if [ "$CONFIG_FB_MATROX_G100" = "y" ]; then
diff -urdN linux/drivers/video/matrox/matroxfb_DAC1064.c linux/drivers/video/matrox/matroxfb_DAC1064.c
--- linux/drivers/video/matrox/matroxfb_DAC1064.c Thu Aug 10 19:34:31 2000
+++ linux/drivers/video/matrox/matroxfb_DAC1064.c Fri Nov 24 19:25:40 2000
@@ -227,15 +227,35 @@
DBG("DAC1064_calcclock")

fvco = PLL_calcclock(PMINFO freq, fmax, in, feed, &p);
- p = (1 << p) - 1;
- if (fvco <= 100000)
- ;
- else if (fvco <= 140000)
- p |= 0x08;
- else if (fvco <= 180000)
- p |= 0x10;
- else
- p |= 0x18;
+
+ if (ACCESS_FBINFO(devflags.g450dac)) {
+ if (fvco <= 300000) /* 276-324 */
+ ;
+ else if (fvco <= 400000) /* 378-438 */
+ p |= 0x08;
+ else if (fvco <= 550000) /* 540-567 */
+ p |= 0x10;
+ else if (fvco <= 690000) /* 675-695 */
+ p |= 0x18;
+ else if (fvco <= 800000) /* 776-803 */
+ p |= 0x20;
+ else if (fvco <= 891000) /* 891-891 */
+ p |= 0x28;
+ else if (fvco <= 940000) /* 931-945 */
+ p |= 0x30;
+ else /* <959 */
+ p |= 0x38;
+ } else {
+ p = (1 << p) - 1;
+ if (fvco <= 100000)
+ ;
+ else if (fvco <= 140000)
+ p |= 0x08;
+ else if (fvco <= 180000)
+ p |= 0x10;
+ else
+ p |= 0x18;
+ }
*post = p;
}

@@ -738,7 +758,11 @@
DBG("MGAG100_preinit")

/* there are some instabilities if in_div > 19 && vco < 61000 */
- ACCESS_FBINFO(features.pll.vco_freq_min) = 62000;
+ if (ACCESS_FBINFO(devflags.g450dac)) {
+ ACCESS_FBINFO(features.pll.vco_freq_min) = 130000; /* my sample: >118 */
+ } else {
+ ACCESS_FBINFO(features.pll.vco_freq_min) = 62000;
+ }
ACCESS_FBINFO(features.pll.ref_freq) = 27000;
ACCESS_FBINFO(features.pll.feed_div_min) = 7;
ACCESS_FBINFO(features.pll.feed_div_max) = 127;
diff -urdN linux/drivers/video/matrox/matroxfb_base.c linux/drivers/video/matrox/matroxfb_base.c
--- linux/drivers/video/matrox/matroxfb_base.c Mon Oct 2 03:35:16 2000
+++ linux/drivers/video/matrox/matroxfb_base.c Fri Nov 24 19:13:17 2000
@@ -1421,12 +1421,14 @@
#define DEVF_CRTC2 0x0800
#define DEVF_MAVEN_CAPABLE 0x1000
#define DEVF_PANELLINK_CAPABLE 0x2000
+#define DEVF_G450DAC 0x4000

#define DEVF_GCORE (DEVF_VIDEO64BIT | DEVF_SWAPS | DEVF_CROSS4MB | DEVF_DDC_8_2)
#define DEVF_G2CORE (DEVF_GCORE | DEVF_ANY_VXRES | DEVF_MAVEN_CAPABLE | DEVF_PANELLINK_CAPABLE)
#define DEVF_G100 (DEVF_GCORE) /* no doc, no vxres... */
#define DEVF_G200 (DEVF_G2CORE)
#define DEVF_G400 (DEVF_G2CORE | DEVF_SUPPORT32MB | DEVF_TEXT16B | DEVF_CRTC2)
+#define DEVF_G450 (DEVF_G2CORE | DEVF_SUPPORT32MB | DEVF_TEXT16B | DEVF_CRTC2 | DEVF_G450DAC)

static struct board {
unsigned short vendor, device, rev, svid, sid;
@@ -1554,18 +1556,24 @@
230000,
&vbG200,
"unknown G200 (AGP)"},
- {PCI_VENDOR_ID_MATROX, PCI_DEVICE_ID_MATROX_G400_AGP, 0xFF,
+ {PCI_VENDOR_ID_MATROX, PCI_DEVICE_ID_MATROX_G400_AGP, 0x80,
PCI_SS_VENDOR_ID_MATROX, PCI_SS_ID_MATROX_MILLENNIUM_G400_MAX_AGP,
DEVF_G400,
360000,
&vbG400,
"Millennium G400 MAX (AGP)"},
- {PCI_VENDOR_ID_MATROX, PCI_DEVICE_ID_MATROX_G400_AGP, 0xFF,
+ {PCI_VENDOR_ID_MATROX, PCI_DEVICE_ID_MATROX_G400_AGP, 0x80,
0, 0,
DEVF_G400,
300000,
&vbG400,
"unknown G400 (AGP)"},
+ {PCI_VENDOR_ID_MATROX, PCI_DEVICE_ID_MATROX_G400_AGP, 0xFF,
+ 0, 0,
+ DEVF_G450,
+ 500000, /* ??? vco goes up to 900MHz... */
+ &vbG400,
+ "unknown G450 (AGP)"},
#endif
{0, 0, 0xFF,
0, 0,
@@ -1627,7 +1635,7 @@
if (dfp)
ACCESS_FBINFO(output.ph) |= MATROXFB_OUTPUT_CONN_DFP;
}
-
+ ACCESS_FBINFO(devflags.g450dac) = b->flags & DEVF_G450DAC;
ACCESS_FBINFO(devflags.textstep) = ACCESS_FBINFO(devflags.vgastep) * ACCESS_FBINFO(devflags.textmode);
ACCESS_FBINFO(devflags.textvram) = 65536 / ACCESS_FBINFO(devflags.textmode);

diff -urdN linux/drivers/video/matrox/matroxfb_base.h linux/drivers/video/matrox/matroxfb_base.h
--- linux/drivers/video/matrox/matroxfb_base.h Thu Aug 10 19:34:31 2000
+++ linux/drivers/video/matrox/matroxfb_base.h Fri Nov 24 19:04:38 2000
@@ -531,6 +531,7 @@
unsigned int ydstorg; /* offset in bytes from video start to usable memory */
/* 0 except for 6MB Millenium */
int memtype;
+ int g450dac;
} devflags;
struct display_switch dispsw;
struct {
-
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