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drm/radeon/kms: allow rendering while no colorbuffer is set on r300

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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>
This commit is contained in:
Marek Olšák
2009-12-17 06:02:28 +01:00
committed by Dave Airlie
parent 5ea597f376
commit 46c64d4bfa
3 changed files with 19 additions and 1 deletions
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4
drivers/gpu/drm/radeon/r100_track.h
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@@ -67,13 +67,15 @@ struct r100_cs_track {
unsigned immd_dwords;
unsigned num_arrays;
unsigned max_indx;
unsigned color_channel_mask;
struct r100_cs_track_array arrays[11];
struct r100_cs_track_cb cb[R300_MAX_CB];
struct r100_cs_track_cb zb;
struct r100_cs_track_texture textures[R300_TRACK_MAX_TEXTURE];
bool z_enabled;
bool separate_cube;
bool fastfill;
bool blend_read_enable;
};
int r100_cs_track_check(struct radeon_device *rdev, struct r100_cs_track *track);