gallium/radeon: add an env variable to force a level of aniso filtering

Reviewed-by: Nicolai Hähnle <[email protected]>

2 files changed, 10 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 490cf8b66b5..a7477abea34 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -889,6 +889,13 @@ bool r600_common_screen_init(struct r600_common_screen *rscreen,
 	rscreen->chip_class = rscreen->info.chip_class;
 	rscreen->debug_flags = debug_get_flags_option("R600_DEBUG", common_debug_options, 0);
 
+	rscreen->force_aniso = MIN2(16, debug_get_num_option("R600_TEX_ANISO", -1));
+	if (rscreen->force_aniso >= 0) {
+		printf("radeon: Forcing anisotropy filter to %ix\n",
+		       /* round down to a power of two */
+		       1 << util_logbase2(rscreen->force_aniso));
+	}
+
 	util_format_s3tc_init();
 	pipe_mutex_init(rscreen->aux_context_lock);
 	pipe_mutex_init(rscreen->gpu_load_mutex);
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index 88879b7b8f0..a6abe09d438 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -306,6 +306,9 @@ struct r600_common_screen {
 	bool				has_cp_dma;
 	bool				has_streamout;
 
+	/* Texture filter settings. */
+	int				force_aniso; /* -1 = disabled */
+
 	/* Auxiliary context. Mainly used to initialize resources.
 	 * It must be locked prior to using and flushed before unlocking. */
 	struct pipe_context		*aux_context;