Hi,
Several years ago, I started a thread about stability issues with hp
zx1 chipset and ATI FireGL X1 graphics adapter on ia64 platform [1].
As an attempt to minimize problems, a quirk was introduced to restrict
AGP mode to 2x [2]. This never solve the stability issues, as the real
cause was in fact incorrect settings of the selectable timer interrupt
frequency [3].
The attached patch thus removes the useless restriction on AGP mode.
Indeed, I'm running at full AGP 4x mode for several weeks now without
a problem.
The attached patch applies cleanly against 3.15-rc5.
Thanks,
Émeric
[1] http://marc.info/?l=dri-devel&m=126494456828755&w=2
[2] http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/?id=a7f465f73363fce409870f62173d518b1bc02ae6
[3] http://marc.info/?l=linux-ia64&m=140077543819871&w=2
Removes useless quirk a7f465f73363fce409870f62173d518b1bc02ae6 introduced with
fdo #7770 as a failed attempt to minimize stability issues with hp zx1 chipset/
ATI FireGL X1 graphics adapter configuration
(see http://marc.info/?l=linux-ia64&m=140077543819871&w=2 for details/reason)
Signed-off-by: Émeric MASCHINO <emeric dot maschino at gmail dot com>
---
diff --git a/drivers/gpu/drm/radeon/radeon_agp.c b/drivers/gpu/drm/radeon/radeon_agp.c
index 4243334..a9297b2 100644
--- a/drivers/gpu/drm/radeon/radeon_agp.c
+++ b/drivers/gpu/drm/radeon/radeon_agp.c
@@ -117,9 +117,6 @@ static struct radeon_agpmode_quirk radeon_agpmode_quirk_list[] = {
/* ATI Host Bridge / RV280 [M9+] Needs AGPMode 1 (phoronix forum) */
{ PCI_VENDOR_ID_ATI, 0xcbb2, PCI_VENDOR_ID_ATI, 0x5c61,
PCI_VENDOR_ID_SONY, 0x8175, 1},
- /* HP Host Bridge / R300 [FireGL X1] Needs AGPMode 2 (fdo #7770) */
- { PCI_VENDOR_ID_HP, 0x122e, PCI_VENDOR_ID_ATI, 0x4e47,
- PCI_VENDOR_ID_ATI, 0x0152, 2},
{ 0, 0, 0, 0, 0, 0, 0 },
};
#endif
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