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drm/radeon/kms: vram sizing on certain r100 chips needs workaround.

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If an rn50/r100/m6/m7 GPU has < 64MB RAM, i.e. 8/16/32, the
aperture used to calculate the MC_FB_LOCATION needs to be worked
out from the CONFIG_APER_SIZE register, and not the actual vram size.

TTM VRAM size was also being initialised wrong, use actual vram size
to initialise it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2009-07-21 20:39:30 +10:00
parent 664f865902
commit 7a50f01a4a
12 changed files with 56 additions and 42 deletions
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5
drivers/gpu/drm/radeon/r600.c
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@@ -67,7 +67,7 @@ int r600_mc_init(struct radeon_device *rdev)
"programming pipes. Bad things might happen.\n");
}
tmp = rdev->mc.vram_location + rdev->mc.vram_size - 1;
tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size - 1;
tmp = REG_SET(R600_MC_FB_TOP, tmp >> 24);
tmp |= REG_SET(R600_MC_FB_BASE, rdev->mc.vram_location >> 24);
WREG32(R600_MC_VM_FB_LOCATION, tmp);
@@ -140,7 +140,8 @@ void r600_vram_get_type(struct radeon_device *rdev)
void r600_vram_info(struct radeon_device *rdev)
{
r600_vram_get_type(rdev);
rdev->mc.vram_size = RREG32(R600_CONFIG_MEMSIZE);
rdev->mc.real_vram_size = RREG32(R600_CONFIG_MEMSIZE);
rdev->mc.mc_vram_size = rdev->mc.real_vram_size;
/* Could aper size report 0 ? */
rdev->mc.aper_base = drm_get_resource_start(rdev->ddev, 0);