drm/radeon/kms: optimize CS state checking for r100->r500

The colorbuffer, zbuffer, and texture states are checked only once when
they get changed. This improves performance in the apps which emit
lots of draw packets and few state changes.

This drops performance in glxgears by a 1% or so, but glxgears is not
a benchmark we care about.
The time spent in the kernel when running Torcs dropped from 33% to 23%
and the frame rate is higher, which is a good thing.

r600 might need something like this as well.

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/r100_track.h b/drivers/gpu/drm/radeon/r100_track.h
index af65600e656..ee85c4a1fc0 100644
--- a/drivers/gpu/drm/radeon/r100_track.h
+++ b/drivers/gpu/drm/radeon/r100_track.h
@@ -52,14 +52,7 @@ struct r100_cs_track_texture {
 	unsigned                compress_format;
 };
 
-struct r100_cs_track_limits {
-	unsigned num_cb;
-	unsigned num_texture;
-	unsigned max_levels;
-};
-
 struct r100_cs_track {
-	struct radeon_device *rdev;
 	unsigned			num_cb;
 	unsigned                        num_texture;
 	unsigned			maxy;
@@ -78,6 +71,10 @@ struct r100_cs_track {
 	bool                            separate_cube;
 	bool				zb_cb_clear;
 	bool				blend_read_enable;
+
+	bool				cb_dirty;
+	bool				zb_dirty;
+	bool				tex_dirty;
 };
 
 int r100_cs_track_check(struct radeon_device *rdev, struct r100_cs_track *track);