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panfrost: limit sample_shading to bifrost and later

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We haven't wired this up in the Midgard compiler, so we can't expose
sample shading on Midgard GPUs. This all seems fixable, because the KILL
instruction can update the coverage without the kill-flag (yeah, a bit
confusing naming), but until someone puts in the time to wire up that,
let's just disable the functionality to avoid crashes.

Fixes: 6bba718027 ("panfrost: Advertise SAMPLE_SHADING")
Reviewed-by: Eric R. Smith <eric.smith@collabora.com>
Reviewed-by: Mary Guillemard <mary.guillemard@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35881>
This commit is contained in:
Erik Faye-Lund 2025-07-02 12:34:33 +02:00 • committed by Marge Bot
parent 6237388454
commit 504e511c44
1 changed files with 1 additions and 1 deletions
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2
src/gallium/drivers/panfrost/pan_screen.c
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@ -639,7 +639,7 @@ panfrost_init_screen_caps(struct panfrost_screen *screen)
caps->depth_clip_disable = true;
caps->mixed_framebuffer_sizes = true;
caps->frontend_noop = true;
caps->sample_shading = true;
caps->sample_shading = dev->arch >= 6;
caps->fragment_shader_derivatives = true;
caps->framebuffer_no_attachment = true;
caps->quads_follow_provoking_vertex_convention = true;