diff options
| author | Marek Olšák <maraeo@gmail.com> | 2009-12-17 06:02:28 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-12-23 02:14:04 +0100 |
| commit | 46c64d4bfa01cda7d58c514164f8b127ab6741b7 (patch) | |
| tree | 92f3439c7b761d199714cb84bf09a937582b0c6e /drivers/gpu/drm/radeon/r300.c | |
| parent | drm/radeon/kms: enable memory clock reading on legacy (V2) (diff) | |
| download | linux-46c64d4bfa01cda7d58c514164f8b127ab6741b7.tar.xz linux-46c64d4bfa01cda7d58c514164f8b127ab6741b7.zip | |
drm/radeon/kms: allow rendering while no colorbuffer is set on r300
Because hardware cannot disable all colorbuffers directly to do depth-only
rendering, a user should:
- disable reading from a colorbuffer in blending
- disable fastfill
- set the color channel mask to 0 to prevent writing to a colorbuffer
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/r300.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r300.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c index 83490c2b5061..6a5d1177afab 100644 --- a/drivers/gpu/drm/radeon/r300.c +++ b/drivers/gpu/drm/radeon/r300.c @@ -992,6 +992,18 @@ static int r300_packet0_check(struct radeon_cs_parser *p, } ib[idx] = idx_value + ((u32)reloc->lobj.gpu_offset); break; + case 0x4e0c: + /* RB3D_COLOR_CHANNEL_MASK */ + track->color_channel_mask = idx_value; + break; + case 0x4d1c: + /* ZB_BW_CNTL */ + track->fastfill = !!(idx_value & (1 << 2)); + break; + case 0x4e04: + /* RB3D_BLENDCNTL */ + track->blend_read_enable = !!(idx_value & (1 << 2)); + break; case 0x4be8: /* valid register only on RV530 */ if (p->rdev->family == CHIP_RV530) |