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drm/radeon/kms: fix agp mode setup on cards that use pcie bridges

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Asics that use an AGP to PCIE bridge don't have the AGP_STATUS
register so just use whatever mode the host side setup.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: Jerome Glisse <glisse@freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2010-08-18 13:34:11 -04:00 committed by Dave Airlie
parent 09f0c489fa
commit e57415d85f
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/radeon/radeon_agp.c
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@ -156,7 +156,13 @@ int radeon_agp_init(struct radeon_device *rdev)
}
mode.mode = info.mode;
agp_status = (RREG32(RADEON_AGP_STATUS) | RADEON_AGPv3_MODE) & mode.mode;
/* chips with the agp to pcie bridge don't have the AGP_STATUS register
* Just use the whatever mode the host sets up.
*/
if (rdev->family <= CHIP_RV350)
agp_status = (RREG32(RADEON_AGP_STATUS) | RADEON_AGPv3_MODE) & mode.mode;
else
agp_status = mode.mode;
is_v3 = !!(agp_status & RADEON_AGPv3_MODE);
if (is_v3) {