vc4: Implement job shuffling

Track rendering to each FBO independently and flush rendering only when
necessary.  This lets us avoid the overhead of storing and loading the
frame when an application momentarily switches to rendering to some other
texture in order to continue rendering the main scene.

Improves glmark -b desktop:effect=shadow:windows=4 by 27%
Improves glmark -b
    desktop:blur-radius=5:effect=blur:passes=1:separable=true:windows=4
    by 17%

While I haven't tested other apps, this should help X rendering a lot, and
I've heard GLBenchmark needed it too.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/gallium/drivers/vc4/vc4_simulator.c b/src/gallium/drivers/vc4/vc4_simulator.c
index 81d34761b41..b802391aa6e 100644
--- a/src/gallium/drivers/vc4/vc4_simulator.c
+++ b/src/gallium/drivers/vc4/vc4_simulator.c
@@ -74,11 +74,10 @@ drm_gem_cma_create(struct drm_device *dev, size_t size)
 }
 
 static int
-vc4_simulator_pin_bos(struct drm_device *dev, struct vc4_exec_info *exec)
+vc4_simulator_pin_bos(struct drm_device *dev, struct vc4_job *job,
+                      struct vc4_exec_info *exec)
 {
         struct drm_vc4_submit_cl *args = exec->args;
-        struct vc4_context *vc4 = dev->vc4;
-        struct vc4_job *job = vc4->job;
         struct vc4_bo **bos = job->bo_pointers.base;
 
         exec->bo_count = args->bo_handle_count;
@@ -220,7 +219,8 @@ vc4_dump_to_file(struct vc4_exec_info *exec)
 }
 
 int
-vc4_simulator_flush(struct vc4_context *vc4, struct drm_vc4_submit_cl *args)
+vc4_simulator_flush(struct vc4_context *vc4,
+                    struct drm_vc4_submit_cl *args, struct vc4_job *job)
 {
         struct vc4_screen *screen = vc4->screen;
         struct vc4_surface *csurf = vc4_surface(vc4->framebuffer.cbufs[0]);
@@ -257,7 +257,7 @@ vc4_simulator_flush(struct vc4_context *vc4, struct drm_vc4_submit_cl *args)
 
         exec.args = args;
 
-        ret = vc4_simulator_pin_bos(dev, &exec);
+        ret = vc4_simulator_pin_bos(dev, job, &exec);
         if (ret)
                 return ret;