vmwgfx: Do better culling of presents

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index ac24cfd431b5449aa0afbd344469b2abc3c5eb3b..d31ae338cfc1d433bd2fecc7107fba06fdc7c648 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1098,6 +1098,7 @@ int vmw_kms_present(struct vmw_private *dev_priv,
        size_t fifo_size;
        int i, k, num_units;
        int ret = 0; /* silence warning */
+       int left, right, top, bottom;
 
        struct {
                SVGA3dCmdHeader header;
@@ -1122,30 +1123,42 @@ int vmw_kms_present(struct vmw_private *dev_priv,
                return -ENOMEM;
        }
 
+       left = clips->x;
+       right = clips->x + clips->w;
+       top = clips->y;
+       bottom = clips->y + clips->h;
+
+       for (i = 1; i < num_clips; i++) {
+               left = min_t(int, left, (int)clips[i].x);
+               right = max_t(int, right, (int)clips[i].x + clips[i].w);
+               top = min_t(int, top, (int)clips[i].y);
+               bottom = max_t(int, bottom, (int)clips[i].y + clips[i].h);
+       }
+
        /* only need to do this once */
        memset(cmd, 0, fifo_size);
        cmd->header.id = cpu_to_le32(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN);
        cmd->header.size = cpu_to_le32(fifo_size - sizeof(cmd->header));
 
-       cmd->body.srcRect.left = 0;
-       cmd->body.srcRect.right = surface->sizes[0].width;
-       cmd->body.srcRect.top = 0;
-       cmd->body.srcRect.bottom = surface->sizes[0].height;
+       cmd->body.srcRect.left = left;
+       cmd->body.srcRect.right = right;
+       cmd->body.srcRect.top = top;
+       cmd->body.srcRect.bottom = bottom;
 
        blits = (SVGASignedRect *)&cmd[1];
        for (i = 0; i < num_clips; i++) {
-               blits[i].left   = clips[i].x;
-               blits[i].right  = clips[i].x + clips[i].w;
-               blits[i].top    = clips[i].y;
-               blits[i].bottom = clips[i].y + clips[i].h;
+               blits[i].left   = clips[i].x - left;
+               blits[i].right  = clips[i].x + clips[i].w - left;
+               blits[i].top    = clips[i].y - top;
+               blits[i].bottom = clips[i].y + clips[i].h - top;
        }
 
        for (k = 0; k < num_units; k++) {
                struct vmw_display_unit *unit = units[k];
-               int clip_x1 = destX - unit->crtc.x;
-               int clip_y1 = destY - unit->crtc.y;
-               int clip_x2 = clip_x1 + surface->sizes[0].width;
-               int clip_y2 = clip_y1 + surface->sizes[0].height;
+               int clip_x1 = left + destX - unit->crtc.x;
+               int clip_y1 = top + destY - unit->crtc.y;
+               int clip_x2 = right + destX - unit->crtc.x;
+               int clip_y2 = bottom + destY - unit->crtc.y;
 
                /* skip any crtcs that misses the clip region */
                if (clip_x1 >= unit->crtc.mode.hdisplay ||