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panvk: Pull multiview lowering out of panvk_lower_nir()

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It only applies to vertex shaders right now.  Also, once we add
geometry, it won't really work anymore so we'll need to do something
else.

Reviewed-by: Christoph Pillmayer <christoph.pillmayer@arm.com>
Acked-by: Eric R. Smith <eric.smith@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38821>
This commit is contained in:
Faith Ekstrand 2025-11-06 11:00:02 -05:00 • committed by Marge Bot
parent 4f0386fbfb
commit 4909e23d11
1 changed files with 21 additions and 17 deletions
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38
src/panfrost/vulkan/panvk_vX_shader.c
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@ -780,23 +780,6 @@ panvk_lower_nir(struct panvk_device *dev, nir_shader *nir,
};
NIR_PASS(_, nir, nir_opt_access, &access_options);
#if PAN_ARCH >= 10
if (stage == MESA_SHADER_VERTEX && compile_input->view_mask) {
nir_lower_multiview_options options = {
.view_mask = compile_input->view_mask,
.allowed_per_view_outputs = ~0
};
/* The only case where this should fail is with memory/image writes,
* which we don't support in vertex shaders */
assert(nir_can_lower_multiview(nir, options));
NIR_PASS(_, nir, nir_lower_multiview, options);
/* Pull output writes out of the loop and give them constant offsets for
* pan_nir_lower_store_components */
NIR_PASS(_, nir, nir_lower_io_vars_to_temporaries,
nir_shader_get_entrypoint(nir), nir_var_shader_out);
}
#endif
const struct lower_ycbcr_state ycbcr_state = {
.set_layout_count = set_layout_count,
.set_layouts = set_layouts,
@ -1327,6 +1310,27 @@ panvk_compile_shader(struct panvk_device *dev,
nir_shader *nir =
clone_nir ? nir_shader_clone(NULL, info->nir) : info->nir;
#if PAN_ARCH >= 10
if (inputs.view_mask) {
nir_lower_multiview_options options = {
.view_mask = inputs.view_mask,
.allowed_per_view_outputs = ~0
};
/* The only case where this should fail is with memory/image
* writes, which we don't support in vertex shaders
*/
assert(nir_can_lower_multiview(nir, options));
NIR_PASS(_, nir, nir_lower_multiview, options);
/* Pull output writes out of the loop and give them constant
* offsets for pan_lower_store_components
*/
NIR_PASS(_, nir, nir_lower_io_vars_to_temporaries,
nir_shader_get_entrypoint(nir), nir_var_shader_out);
}
#endif
panvk_lower_nir(dev, nir, info->set_layout_count,
info->set_layouts, info->robustness,
state, &inputs, &variant->desc_info);