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Subject[PATCH 2.4.0] agpgart support for i815 not using on-board video
the agp driver for the i810/i815 is designed to support the 810/815's
on-board i7xx video. the i815 (which can use on-board video or a seperate
AGP 2x/4x/Pro card) does not function with this driver when using a
seperate AGP card.

the 440LX/BX/GX and 840 agp driver does work, however, if
agp_try_unsupported is set to 1 -- they all share the same generic Intel
AGP interface, the driver just does not detect the i815.

this patch, against 2.4.0-test11-pre5, adds specific support for the 815
to the 440LX/BX/GX/840 driver, so agp_try_unsupported need not be set, and
the i815 is detected and handled properly.

the patch also updates the configure docs to show that CONFIG_AGP_INTEL
now supports the i815, and CONFIG_AGP_I810 supports the i815 when using
the on-board video only.

ive been using this patch for a couple days with no problem, and
agp_try_unsupported=1 for many months ... DRI works great with it.

my system is an ASUS CUSL2 with a Matrox G400.

--
Robert M. Love
rml@ufl.edu
rml@tech9.net
diff --recursive -u linux~/CREDITS linux/CREDITS
--- linux~/CREDITS Tue Nov 14 20:39:13 2000
+++ linux/CREDITS Tue Nov 14 19:54:51 2000
@@ -1600,7 +1600,8 @@
E: rml@tech9.net
E: rml@ufl.edu
D: misc. kernel hacking and debugging
-S: FL, USA
+S: Gainesville, Florida 32608
+S: USA

N: Martin von Löwis
E: loewis@informatik.hu-berlin.de
diff --recursive -u linux~/Documentation/Configure.help linux/Documentation/Configure.help
--- linux~/Documentation/Configure.help Tue Nov 14 20:39:13 2000
+++ linux/Documentation/Configure.help Tue Nov 14 19:54:51 2000
@@ -2355,7 +2355,7 @@
Intel 440LX/BX/GX support
CONFIG_AGP_INTEL
This option gives you AGP support for the GLX component of the
- XFree86 4.x on Intel 440LX/BX/GX chipsets.
+ XFree86 4.x on Intel 440LX/BX/GX, 815, and 840 chipsets.

For the moment, you should probably say N, unless you want to test
the GLX component for XFree86 3.3.6, which can be downloaded from
@@ -2363,9 +2363,9 @@

Intel I810/I810 DC100/I810e support
CONFIG_AGP_I810
- This option gives you AGP support for the Xserver for the Intel
- 810 chipset boards. This is required to do any useful video
- modes.
+ This option gives you AGP support for the Xserver on the Intel 810
+ and 815 chipset boards for their on-board integrated graphics. This
+ is required to do any useful video modes with these boards.

VIA chipset support
CONFIG_AGP_VIA
diff --recursive -u linux~/drivers/char/Config.in linux/drivers/char/Config.in
--- linux~/drivers/char/Config.in Tue Nov 14 20:39:14 2000
+++ linux/drivers/char/Config.in Tue Nov 14 19:56:34 2000
@@ -178,8 +178,8 @@

tristate '/dev/agpgart (AGP Support)' CONFIG_AGP $CONFIG_DRM_AGP
if [ "$CONFIG_AGP" != "n" ]; then
- bool ' Intel 440LX/BX/GX 840 support' CONFIG_AGP_INTEL
- bool ' Intel I810/I815 support' CONFIG_AGP_I810
+ bool ' Intel 440LX/BX/GX and I815/I840 support' CONFIG_AGP_INTEL
+ bool ' Intel I810/I815 (on-board) support' CONFIG_AGP_I810
bool ' VIA chipset support' CONFIG_AGP_VIA
bool ' AMD Irongate support' CONFIG_AGP_AMD
bool ' Generic SiS support' CONFIG_AGP_SIS
diff --recursive -u linux~/drivers/char/agp/agpgart_be.c linux/drivers/char/agp/agpgart_be.c
--- linux~/drivers/char/agp/agpgart_be.c Tue Nov 14 20:39:14 2000
+++ linux/drivers/char/agp/agpgart_be.c Tue Nov 14 19:54:51 2000
@@ -2057,6 +2057,13 @@
"Intel",
"440GX",
intel_generic_setup },
+ /* could we add support for PCI_DEVICE_ID_INTEL_815_1 too ? */
+ { PCI_DEVICE_ID_INTEL_815_0,
+ PCI_VENDOR_ID_INTEL,
+ INTEL_I815,
+ "Intel",
+ "i815",
+ intel_generic_setup },
{ PCI_DEVICE_ID_INTEL_840_0,
PCI_VENDOR_ID_INTEL,
INTEL_I840,
diff --recursive -u linux~/include/linux/agp_backend.h linux/include/linux/agp_backend.h
--- linux~/include/linux/agp_backend.h Tue Nov 14 20:39:15 2000
+++ linux/include/linux/agp_backend.h Tue Nov 14 19:54:53 2000
@@ -45,6 +45,7 @@
INTEL_BX,
INTEL_GX,
INTEL_I810,
+ INTEL_I815,
INTEL_I840,
VIA_GENERIC,
VIA_VP3,
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