lima: add precompile debug flag

This flag will be used by run from mesa-shader-db to trigger shader
compilation with default settings.

Tested-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Reviewed-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9583>

src/gallium/drivers/lima/lima_program.c

@@ -368,6 +368,7 @@ lima_create_fs_state(struct pipe_context *pctx,
    so->base.type = PIPE_SHADER_IR_NIR;
    so->base.ir.nir = nir;
 
+   if (lima_debug & LIMA_DEBUG_PRECOMPILE) {
       /* Trigger initial compilation with default settings */
       struct lima_fs_key key = {
          .shader_state = so,
@@ -377,6 +378,7 @@ lima_create_fs_state(struct pipe_context *pctx,
             key.tex[i].swizzle[j] = j;
       }
       lima_get_compiled_fs(ctx, &key);
+   }
 
    return so;
 }
@@ -568,11 +570,13 @@ lima_create_vs_state(struct pipe_context *pctx,
    so->base.type = PIPE_SHADER_IR_NIR;
    so->base.ir.nir = nir;
 
+   if (lima_debug & LIMA_DEBUG_PRECOMPILE) {
       /* Trigger initial compilation with default settings */
       struct lima_vs_key key = {
          .shader_state = so,
       };
       lima_get_compiled_vs(ctx, &key);
+   }
 
    return so;
 }

src/gallium/drivers/lima/lima_screen.c

@@ -568,6 +568,8 @@ static const struct debug_named_value lima_debug_options[] = {
           "disable growable heap buffer" },
         { "singlejob", LIMA_DEBUG_SINGLE_JOB,
           "disable multi job optimization" },
+        { "precompile", LIMA_DEBUG_PRECOMPILE,
+          "Precompile shaders for shader-db" },
         { NULL }
 };
 

src/gallium/drivers/lima/lima_screen.h

@@ -42,6 +42,7 @@
 #define LIMA_DEBUG_NO_TILING      (1 << 6)
 #define LIMA_DEBUG_NO_GROW_HEAP   (1 << 7)
 #define LIMA_DEBUG_SINGLE_JOB     (1 << 8)
+#define LIMA_DEBUG_PRECOMPILE     (1 << 9)
 
 extern uint32_t lima_debug;
 extern int lima_ctx_num_plb;