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drm: add test for AGP devices and driver override for it.

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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>
This commit is contained in:
Dave Airlie
2005-07-10 17:31:26 +10:00
committed by Dave Airlie
parent ceb9c27aa7
commit cda1738066
13 changed files with 123 additions and 3 deletions
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3
drivers/char/drm/drm_stub.c
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@ -91,7 +91,8 @@ static int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct
goto error_out_unreg;
if (drm_core_has_AGP(dev)) {
dev->agp = drm_agp_init(dev);
if (drm_device_is_agp(dev))
dev->agp = drm_agp_init(dev);
if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) {
DRM_ERROR( "Cannot initialize the agpgart module.\n" );
retcode = -EINVAL;