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| author | Rob Clark <robclark@freedesktop.org> | 2016-05-03 12:43:12 -0400 |
|---|---|---|
| committer | Rob Clark <robclark@freedesktop.org> | 2016-05-04 11:25:55 -0400 |
| commit | 1f2bc64f31872f04c27f9aa7a93e63a0091aaabf (patch) | |
| tree | 738ca7c8ae664b4c425d35f16d6c5c0c8c544733 | |
| parent | a6ad30202cacc933290f478d8f518a7b066268b6 (diff) | |
freedreno/a4xx: deal with VS which do not write position
Fixes $piglit/bin/glsl-1.40-tf-no-position
a3xx may need similar?
Signed-off-by: Rob Clark <robclark@freedesktop.org>
| -rw-r--r-- | src/gallium/drivers/freedreno/a4xx/fd4_program.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/gallium/drivers/freedreno/a4xx/fd4_program.c b/src/gallium/drivers/freedreno/a4xx/fd4_program.c index 4396383eef..9dc4ebbf08 100644 --- a/src/gallium/drivers/freedreno/a4xx/fd4_program.c +++ b/src/gallium/drivers/freedreno/a4xx/fd4_program.c @@ -229,6 +229,13 @@ fd4_program_emit(struct fd_ringbuffer *ring, struct fd4_emit *emit, constmode = 1; pos_regid = ir3_find_output_regid(s[VS].v, VARYING_SLOT_POS); + if (pos_regid == regid(63, 0)) { + /* hw dislikes when there is no position output, which can + * happen for transform-feedback vertex shaders. Just tell + * the hw to use r0.x, with whatever random value is there: + */ + pos_regid = regid(0, 0); + } posz_regid = ir3_find_output_regid(s[FS].v, FRAG_RESULT_DEPTH); psize_regid = ir3_find_output_regid(s[VS].v, VARYING_SLOT_PSIZ); if (s[FS].v->color0_mrt) { |