v3d: Apply the GFXH-930 workaround to the case where the VS loads attrs.
We were emitting a dummy load for when the VS doesn't load any attributes, but we also need to emit a dummy load for when the render VS loads attributes but the binner VS doesn't. Fixes simulator assertion failures and GPU hangs on KHR-GLES31.core.texture_gather.\*
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@ -322,6 +322,7 @@ v3d_emit_gl_shader_state(struct v3d_context *v3d,
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vtx->defaults_offset);
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}
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bool cs_loaded_any = false;
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for (int i = 0; i < vtx->num_elements; i++) {
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struct pipe_vertex_element *elem = &vtx->pipe[i];
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struct pipe_vertex_buffer *vb =
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@ -341,6 +342,20 @@ v3d_emit_gl_shader_state(struct v3d_context *v3d,
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v3d->prog.cs->prog_data.vs->vattr_sizes[i];
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attr.number_of_values_read_by_vertex_shader =
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v3d->prog.vs->prog_data.vs->vattr_sizes[i];
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/* GFXH-930: At least one attribute must be enabled
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* and read by CS and VS. If we have attributes being
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* consumed by the VS but not the CS, then set up a
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* dummy load of the last attribute into the CS's VPM
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* inputs. (Since CS is just dead-code-elimination
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* compared to VS, we can't have CS loading but not
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* VS).
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*/
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if (v3d->prog.cs->prog_data.vs->vattr_sizes[i])
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cs_loaded_any = true;
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if (i == vtx->num_elements - 1 && !cs_loaded_any) {
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attr.number_of_values_read_by_coordinate_shader = 1;
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}
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#if V3D_VERSION >= 41
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attr.maximum_index = 0xffffff;
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#endif
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