2 files changed, 33 insertions, 19 deletions

diff --git a/src/gallium/drivers/r300/r300_context.h b/src/gallium/drivers/r300/r300_context.h
index 50dcd0fc67c..ac5ae23cb5a 100644
--- a/src/gallium/drivers/r300/r300_context.h
+++ b/src/gallium/drivers/r300/r300_context.h
@@ -365,6 +365,10 @@ struct r300_texture {
 
     /* Buffer tiling */
     enum r300_buffer_tiling microtile, macrotile;
+
+    /* This is the level tiling flags were last time set for.
+     * It's used to prevent redundant tiling-flags changes from happening.*/
+    unsigned surface_level;
 };
 
 struct r300_vertex_element_state {
diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index 93cc0dbe985..c1bac7328e7 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -609,32 +609,42 @@ static void r300_set_stencil_ref(struct pipe_context* pipe,
     r300->dsa_state.dirty = TRUE;
 }
 
-/* This switcheroo is needed just because of goddamned MACRO_SWITCH. */
-static void r300_fb_set_tiling_flags(struct r300_context *r300,
-                               const struct pipe_framebuffer_state *old_state,
-                               const struct pipe_framebuffer_state *new_state)
+static void r300_tex_set_tiling_flags(struct r300_context *r300,
+                                      struct r300_texture *tex, unsigned level)
 {
-    struct r300_texture *tex;
-    unsigned i, level;
-
-    /* Set tiling flags for new surfaces. */
-    for (i = 0; i < new_state->nr_cbufs; i++) {
-        tex = r300_texture(new_state->cbufs[i]->texture);
-        level = new_state->cbufs[i]->level;
+    /* Check if the macrotile flag needs to be changed.
+     * Skip changing the flags otherwise. */
+    if (tex->mip_macrotile[tex->surface_level] != tex->mip_macrotile[level]) {
+        /* Tiling determines how DRM treats the buffer data.
+         * We must flush CS when changing it if the buffer is referenced. */
+        if (r300->rws->is_buffer_referenced(r300->rws, tex->buffer, R300_REF_CS))
+            r300->context.flush(&r300->context, 0, NULL);
 
         r300->rws->buffer_set_tiling(r300->rws, tex->buffer,
                 tex->pitch[0] * util_format_get_blocksize(tex->b.b.format),
                 tex->microtile,
                 tex->mip_macrotile[level]);
+
+        tex->surface_level = level;
     }
-    if (new_state->zsbuf) {
-        tex = r300_texture(new_state->zsbuf->texture);
-        level = new_state->zsbuf->level;
+}
 
-        r300->rws->buffer_set_tiling(r300->rws, tex->buffer,
-                tex->pitch[0] * util_format_get_blocksize(tex->b.b.format),
-                tex->microtile,
-                tex->mip_macrotile[level]);
+/* This switcheroo is needed just because of goddamned MACRO_SWITCH. */
+static void r300_fb_set_tiling_flags(struct r300_context *r300,
+                               const struct pipe_framebuffer_state *state)
+{
+    unsigned i;
+
+    /* Set tiling flags for new surfaces. */
+    for (i = 0; i < state->nr_cbufs; i++) {
+        r300_tex_set_tiling_flags(r300,
+                                  r300_texture(state->cbufs[i]->texture),
+                                  state->cbufs[i]->level);
+    }
+    if (state->zsbuf) {
+        r300_tex_set_tiling_flags(r300,
+                                  r300_texture(state->zsbuf->texture),
+                                  state->zsbuf->level);
     }
 }
 
@@ -704,7 +714,7 @@ static void
     }
 
     /* The tiling flags are dependent on the surface miplevel, unfortunately. */
-    r300_fb_set_tiling_flags(r300, r300->fb_state.state, state);
+    r300_fb_set_tiling_flags(r300, state);
 
     util_assign_framebuffer_state(r300->fb_state.state, state);