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authorArnd Bergmann2013-03-14 23:55:59 +0100
committerArnd Bergmann2013-03-14 23:55:59 +0100
commit7ac6c89189c669fd5f883937f291f18d324d470b (patch)
tree5f0712bdedac45a40148ede0064d4e6eddb4260e /drivers/gpu/drm/nouveau/nouveau_agp.c
parentinput/joystick: use get_cycles on ARM (diff)
parentARM: at91: fix infinite loop in at91_irq_suspend/resume (diff)
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Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes
From Nicolas Ferre <nicolas.ferre@atmel.com>: Two patches for Device Tree on at91sam9x5/NAND. Two more for fixing PM suspend/resume IRQ on AIC5 and GPIO used with pinctrl. * tag 'at91-fixes' of git://github.com/at91linux/linux-at91: ARM: at91: fix infinite loop in at91_irq_suspend/resume ARM: at91: add gpio suspend/resume support when using pinctrl ARM: at91: dt: at91sam9x5: complete NAND pinctrl ARM: at91: dt: at91sam9x5: correct NAND pins comments Includes an update to -rc2 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_agp.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_agp.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_agp.c b/drivers/gpu/drm/nouveau/nouveau_agp.c
index d28430cd2ba6..6e7a55f93a85 100644
--- a/drivers/gpu/drm/nouveau/nouveau_agp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_agp.c
@@ -47,6 +47,18 @@ nouveau_agp_enabled(struct nouveau_drm *drm)
if (drm->agp.stat == UNKNOWN) {
if (!nouveau_agpmode)
return false;
+#ifdef __powerpc__
+ /* Disable AGP by default on all PowerPC machines for
+ * now -- At least some UniNorth-2 AGP bridges are
+ * known to be broken: DMA from the host to the card
+ * works just fine, but writeback from the card to the
+ * host goes straight to memory untranslated bypassing
+ * the GATT somehow, making them quite painful to deal
+ * with...
+ */
+ if (nouveau_agpmode == -1)
+ return false;
+#endif
return true;
}