From 82568565683b4991964a5fc89a9ca0c7122818e8 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 5 Feb 2010 16:00:07 +1000 Subject: drm/radeon/kms: set gart pages to invalid on unbind and point to dummy page this uses a new entrypoint to invalidate gart entries instead of using 0. Changed to rather than pointing to 0 address point empty entry to dummy page. This might help to avoid hard lockup if for some wrong reasons GPU try to access unmapped GART entry. I'm not 100% sure this is going to work, we probably need to allocate a dummy page and point all the GTT entries at it similiar to what AGP does. but we can test this first I suppose. Signed-off-by: Jerome Glisse Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/rs600.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpu/drm/radeon/rs600.c') diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index 979b00034de9..28c8690c7a35 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -213,6 +213,7 @@ int rs600_gart_enable(struct radeon_device *rdev) r = radeon_gart_table_vram_pin(rdev); if (r) return r; + radeon_gart_restore(rdev); /* Enable bus master */ tmp = RREG32(R_00004C_BUS_CNTL) & C_00004C_BUS_MASTER_DIS; WREG32(R_00004C_BUS_CNTL, tmp); -- cgit v1.2.1