panfrost: Dynamically allocate shader variants

This fixes a crash in LZDoom where over 16 shader variants are needed
for a few shaders in some maps, and should also save a few kilobytes
of RAM as most of the time only one or two variants of the 8 previously
allocated are actually needed.

Reviewed-by: Alyssa Rosenzweig <[email protected]>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/gallium/drivers/panfrost/pan_context.h b/src/gallium/drivers/panfrost/pan_context.h
index ad0791bf06a..53ce9ec71df 100644
--- a/src/gallium/drivers/panfrost/pan_context.h
+++ b/src/gallium/drivers/panfrost/pan_context.h
@@ -199,7 +199,6 @@ struct panfrost_rasterizer {
 /* Variants bundle together to form the backing CSO, bundling multiple
  * shaders with varying emulated features baked in (alpha test
  * parameters, etc) */
-#define MAX_SHADER_VARIANTS 8
 
 /* A shader state corresponds to the actual, current variant of the shader */
 struct panfrost_shader_state {
@@ -248,7 +247,9 @@ struct panfrost_shader_variants {
                 struct pipe_compute_state cbase;
         };
 
-        struct panfrost_shader_state variants[MAX_SHADER_VARIANTS];
+        struct panfrost_shader_state *variants;
+        unsigned variant_space;
+
         unsigned variant_count;
 
         /* The current active variant */