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r600: fix cayman msaa shading behavior

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The functionality was working properly at glMinSampleShading(0.)
and glMinSampleShading(1.). The issue was with the intermediary
values. This change makes this function compatible with the
evergreen setup.

Note: this was one of the few functionalities which were working
properly on evergreen but not on cayman.

Here are the tests fixed:
spec/arb_sample_shading/samplemask 4 all/0.500000 partition: fail pass
spec/arb_sample_shading/samplemask 4/0.500000 partition: fail pass
spec/arb_sample_shading/samplemask 6 all/0.250000 partition: fail pass
spec/arb_sample_shading/samplemask 6 all/0.500000 partition: fail pass
spec/arb_sample_shading/samplemask 6/0.250000 partition: fail pass
spec/arb_sample_shading/samplemask 6/0.500000 partition: fail pass
spec/arb_sample_shading/samplemask 8 all/0.250000 partition: fail pass
spec/arb_sample_shading/samplemask 8 all/0.500000 partition: fail pass
spec/arb_sample_shading/samplemask 8/0.250000 partition: fail pass
spec/arb_sample_shading/samplemask 8/0.500000 partition: fail pass
deqp-gles31/functional/shaders/sample_variables/sample_mask_in/bit_count_per_two_samples/multisample_rbo_4: fail pass
deqp-gles31/functional/shaders/sample_variables/sample_mask_in/bit_count_per_two_samples/multisample_rbo_8: fail pass
deqp-gles31/functional/shaders/sample_variables/sample_mask_in/bit_count_per_two_samples/multisample_texture_4: fail pass
deqp-gles31/functional/shaders/sample_variables/sample_mask_in/bit_count_per_two_samples/multisample_texture_8: fail pass

Fixes: f7796a966d ("radeonsi: add basic code for overrasterization")
Signed-off-by: Patrick Lerda <patrick9876@free.fr>
This commit is contained in:
Patrick Lerda 2025-11-24 12:47:51 +01:00
parent 87b81b7385
commit 5f2ac0c9de
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GPG key ID: BFFCAED4BFDCCD2A
1 changed files with 1 additions and 1 deletions
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2
src/gallium/drivers/r600/cayman_msaa.c
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@ -226,7 +226,7 @@ void cayman_emit_msaa_state(struct radeon_cmdbuf *cs, int nr_samples,
if (nr_samples > 1) {
radeon_set_context_reg(cs, CM_R_028804_DB_EQAA,
S_028804_MAX_ANCHOR_SAMPLES(log_samples) |
S_028804_PS_ITER_SAMPLES(log_ps_iter_samples) |
S_028804_PS_ITER_SAMPLES(log_ps_iter_samples ? log_samples : 0) |
S_028804_MASK_EXPORT_NUM_SAMPLES(log_samples) |
S_028804_ALPHA_TO_MASK_NUM_SAMPLES(log_samples) |
S_028804_HIGH_QUALITY_INTERSECTIONS(1) |