diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2009-10-19 17:23:33 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-10-26 13:28:19 +1000 |
| commit | 5885b7a9f4d2a0405b7e42d44eab4ed2302a8239 (patch) | |
| tree | 8b95a46fb5fcaf03c71f55105bbc6a2a48e1ba8d /drivers/gpu/drm/radeon/rv770.c | |
| parent | ceb776bc87280eb8d13f38e4d7afae757e95af44 (diff) | |
drm/radeon/kms: fix vram_width calculation on r6xx/r7xx
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/rv770.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rv770.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c index 595ac638039d..40553913b928 100644 --- a/drivers/gpu/drm/radeon/rv770.c +++ b/drivers/gpu/drm/radeon/rv770.c @@ -774,14 +774,36 @@ int rv770_mc_init(struct radeon_device *rdev) { fixed20_12 a; u32 tmp; + int chansize, numchan; int r; /* Get VRAM informations */ - /* FIXME: Don't know how to determine vram width, need to check - * vram_width usage - */ - rdev->mc.vram_width = 128; rdev->mc.vram_is_ddr = true; + tmp = RREG32(MC_ARB_RAMCFG); + if (tmp & CHANSIZE_OVERRIDE) { + chansize = 16; + } else if (tmp & CHANSIZE_MASK) { + chansize = 64; + } else { + chansize = 32; + } + tmp = RREG32(MC_SHARED_CHMAP); + switch ((tmp & NOOFCHAN_MASK) >> NOOFCHAN_SHIFT) { + case 0: + default: + numchan = 1; + break; + case 1: + numchan = 2; + break; + case 2: + numchan = 4; + break; + case 3: + numchan = 8; + break; + } + rdev->mc.vram_width = numchan * chansize; /* Could aper size report 0 ? */ rdev->mc.aper_base = drm_get_resource_start(rdev->ddev, 0); rdev->mc.aper_size = drm_get_resource_len(rdev->ddev, 0); |