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tu: disable VK_EXT_post_depth_coverage

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The HW returns the wrong result for gl_SampleMaskIn when
post_depth_coverage is enabled together with FSR. This is especially
problematic since we use gl_SampleMaskIn to lower gl_HelperInvocation.
Disable the extension as a workaround.

We are currently unaware of any apps that use VK_EXT_post_depth_coverage
so disabling it should not be a problem.

Signed-off-by: Job Noorman <jnoorman@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35788>
This commit is contained in:
Job Noorman 2025-07-31 08:52:45 +02:00 • committed by Marge Bot
parent 9f2538f1e7
commit a04e172042
2 changed files with 0 additions and 2 deletions
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1
src/freedreno/vulkan/tu_device.cc
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@ -316,7 +316,6 @@ get_device_extensions(const struct tu_physical_device *device,
.EXT_physical_device_drm = !is_kgsl(device->instance),
.EXT_pipeline_creation_cache_control = true,
.EXT_pipeline_creation_feedback = true,
.EXT_post_depth_coverage = true,
.EXT_primitive_topology_list_restart = true,
.EXT_primitives_generated_query = true,
.EXT_private_data = true,

1
src/freedreno/vulkan/tu_shader.cc
View file

@ -1867,7 +1867,6 @@ tu6_emit_fs_inputs(struct tu_cs *cs, const struct ir3_shader_variant *fs)
CONDREG(smask_in_regid, A6XX_RB_PS_INPUT_CNTL_SAMPLEMASK) |
CONDREG(samp_id_regid, A6XX_RB_PS_INPUT_CNTL_SAMPLEID) |
CONDREG(ij_regid[IJ_PERSP_CENTER_RHW], A6XX_RB_PS_INPUT_CNTL_CENTERRHW) |
COND(fs->post_depth_coverage, A6XX_RB_PS_INPUT_CNTL_POSTDEPTHCOVERAGE) |
COND(fs->frag_face, A6XX_RB_PS_INPUT_CNTL_FACENESS) |
CONDREG(shading_rate_regid, A6XX_RB_PS_INPUT_CNTL_FOVEATION));