drm: add test for AGP devices and driver override for it.
Added device_is_agp callback to drm_driver. This function is called by the
platform-specific drm_device_is_agp function. Added implementation of this
function the the Linux-specific portion of the MGA driver to detect PCI G450
cards. Added code to the Linux-specific portion of the generic DRM layer to
not initialize AGP infrastructure if the card is not AGP (this matches what
already existed in BSD).
Fix up i810/i830 and i915 drivers to always return AGP as they don't always
report the capability.
Fix the MGA to not report AGP for a card that has an AGP chip behind a PCI
bridge.
From: Ian Romanick, Dave Airlie, Alan Hourihane
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/i830_drv.h b/drivers/char/drm/i830_drv.h
index df77461..63f96a8 100644
--- a/drivers/char/drm/i830_drv.h
+++ b/drivers/char/drm/i830_drv.h
@@ -137,6 +137,7 @@
extern void i830_driver_release(drm_device_t *dev, struct file *filp);
extern int i830_driver_dma_quiescent(drm_device_t *dev);
extern void i830_driver_prerelease(drm_device_t *dev, DRMFILE filp);
+extern int i830_driver_device_is_agp(drm_device_t * dev);
#define I830_BASE(reg) ((unsigned long) \
dev_priv->mmio_map->handle)