drm/radeon/kms: optimize streamout checking for evergreen

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index b39a089..0427b96 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -797,27 +797,32 @@ static int evergreen_cs_track_validate_texture(struct radeon_cs_parser *p,
 static int evergreen_cs_track_check(struct radeon_cs_parser *p)
 {
        struct evergreen_cs_track *track = p->track;
-       unsigned tmp, i, j;
+       unsigned tmp, i;
        int r;
+       unsigned buffer_mask = 0;
 
        /* check streamout */
-       for (i = 0; i < 4; i++) {
-               if (track->vgt_strmout_config & (1 << i)) {
-                       for (j = 0; j < 4; j++) {
-                               if ((track->vgt_strmout_buffer_config >> (i * 4)) & (1 << j)) {
-                                       if (track->vgt_strmout_bo[j]) {
-                                               u64 offset = (u64)track->vgt_strmout_bo_offset[j] +
-                                                       (u64)track->vgt_strmout_size[j];
-                                               if (offset > radeon_bo_size(track->vgt_strmout_bo[i])) {
-                                                       DRM_ERROR("streamout %d bo too small: 0x%llx, 0x%lx\n",
-                                                                 j, offset,
-                                                                 radeon_bo_size(track->vgt_strmout_bo[j]));
-                                                       return -EINVAL;
-                                               }
-                                       } else {
-                                               dev_warn(p->dev, "No buffer for streamout %d\n", j);
+       if (track->vgt_strmout_config) {
+               for (i = 0; i < 4; i++) {
+                       if (track->vgt_strmout_config & (1 << i)) {
+                               buffer_mask |= (track->vgt_strmout_buffer_config >> (i * 4)) & 0xf;
+                       }
+               }
+
+               for (i = 0; i < 4; i++) {
+                       if (buffer_mask & (1 << i)) {
+                               if (track->vgt_strmout_bo[i]) {
+                                       u64 offset = (u64)track->vgt_strmout_bo_offset[i] +
+                                                       (u64)track->vgt_strmout_size[i];
+                                       if (offset > radeon_bo_size(track->vgt_strmout_bo[i])) {
+                                               DRM_ERROR("streamout %d bo too small: 0x%llx, 0x%lx\n",
+                                                         i, offset,
+                                                         radeon_bo_size(track->vgt_strmout_bo[i]));
                                                return -EINVAL;
                                        }
+                               } else {
+                                       dev_warn(p->dev, "No buffer for streamout %d\n", i);
+                                       return -EINVAL;
                                }
                        }
                }